Electrical fit

Read the appliance rating before choosing a smart plug

Read the appliance plate before reading the plug badge

A smart plug sits between a receptacle and a load. The plug's rating is one boundary; the appliance's voltage, current, wattage, motor behavior and own instructions are the other. The appliance's normal operating draw is not always the whole story, especially when a motor starts. If the device label or manual is unclear, pause and confirm the allowable switching method with its manufacturer or a qualified electrician.

Current and watts answer different questions

Current is measured in amperes. Wattage is power under a stated voltage. A manufacturer's maximum watts may apply only at a particular voltage and load category. Do not compare an appliance's watt figure at one voltage with a plug's maximum at another without understanding the difference. If both amp and watt markings are available, compare both; a matching number on one field does not erase a limit on another.

Motor and compressor loads need their own rating

Many plug specifications state one ceiling for general or resistive use and a different one for motor loads. A motor can draw more current briefly at startup than during steady running, and frequent switching can be unsuitable for some compressors. Read the exact model's motor limit and the appliance's own operating instructions. A generic 15 A claim is not an invitation to power a larger compressor, air conditioner or other high-starting-current device.

One outdoor profile is a different kind of load control: the earlier Kasa KP405 V1 is a lighting dimmer, not a general-purpose relay. Its V1 datasheet specifies up to 300 W incandescent or 150 W dimmable LED (MLV) and leading-edge TRIAC dimming; it does not establish a general appliance current or motor rating. Check the bulb's dimming method and the model-specific instructions rather than treating the KP405 as a resistive-appliance or motor match. See the KP405 V1 assessment.

As examples, TP-Link's Tapo P105 and P110 US material lists 15 A and 1,800 W at 120 V for general/resistive use and separately lists a 1/6 hp motor limit. P105's load table gives lower examples for some appliance types, including a 1,200 W coffee maker, 1,500 W toaster and 120 W water pump. P110 also lists a distinct 8 A incandescent limit (960 W at 120 V). These are separate fit checks, not permission to use a general 1,800 W figure for every load. The appliance label and exact manual still matter. See the P105 load notes and P110 rating details.

Switching is not energy measurement

App control, timers and energy monitoring are separate features. If you want to estimate running cost, confirm that the exact plug measures and reports consumption in the app you plan to use. A plug that can turn a device off has not necessarily measured how much energy it used. We leave monitoring unconfirmed when the product documents do not establish it.

Stop when the rating is uncertain

Do not rely on the finder if the appliance label is missing, the load type is unusual, the plug-in device is damaged, or the instructions prohibit remote control. Do not defeat grounding, adapters, outlet covers or overload protection. Match the exact US version and keep the user guide. The feature filter can reject documented mismatches, but it cannot inspect your wiring or approve a household electrical installation.

Finder answer: general or resistive appliance

Thirty current profiles have a documented general/resistive match, including TP25, HS300 and KP115, the three TP15 V1 package routes, all six Shelly Plug US Gen4 package profiles and Wave Plug LR. Check each appliance against the exact plug’s separate limits rather than treating this class as universal approval; Gen4 is resistive-only, and Wave LR has no documented motor horsepower ceiling.

Thirty current profiles have a documented general/resistive match, including the three black Shelly Plug US Gen4 package profiles and Wave Plug LR; the Gen4 1,800 W ceiling is resistive-only, and Wave LR has no documented motor horsepower rating. Compare black single, black 2-pack, black 4-pack, Wave Plug LR. Wave LR’s exact product page and printed guide disagree on nominal voltage, so use the product-specific assessment rather than treating 1,800 W as blanket appliance approval. Compare the single, 2-pack and 4-pack reviews, then open the same-condition general/resistive finder result.

The outdoor TP25 and P400M each have a 15 A / 1,800 W general-resistive ceiling, but their two sockets share one limit per body; TP25 separately lists a 1/2 hp motor limit. P400M's V1.6-sheet motor value conflicts with the live page's 1/2 hp statement, so keep its seller version check. HS300 V1 is an indoor strip whose six switched AC outlets share 15 A/1,875 W at 125 V; its V1 documents do not establish a motor horsepower ceiling. KP115 V1 has a single 15 A/1,800 W at 120 V outlet, but the checked V1 sources likewise do not establish motor approval. P316M’s six switched outlets share one strip-wide limit. The P430M is not in this general-load set: it is a lighting dimmer with 125 V bulb-specific limits, not an appliance relay. P105 has lower examples for some appliance types, and HS103P3 V3.8's 15 A figure alone does not establish wattage or a supported class. Compare P105, P110, P110M two-pack route, P110M four-pack, P115 two-pack, P115 four-pack, P316M strip, P400M, TP25, HS300 V1, KP115 V1, P430M's lighting-only limit, KP125MP4, EP25P2 V2.6 and P125M V1.20; show every current general/resistive match.

TP15 pack configurations are separate assessment entries; the ratings and functions stated here are per plug, not multiplied by package count. See the evidence for the TP15 V1 one-pack, two-pack and three-pack.

Finder answer: motor rated up to 1/6 hp

Eighteen current configurations match the 1/6 hp motor-class option. TP25 V1 joins because its V1.6 datasheet separately lists a higher 1/2 hp motor ceiling; EP40M is another higher-capacity outdoor model at 0.5 hp. The appliance’s actual horsepower and startup demand remain separate hard checks.

The P105, P110, P110M, P115, P125, P125M and P316M sources state 1/6 hp. The P400M V1.6-linked sheet also states 1/6 hp, although its live product page says 1/2 hp; the exact seller revision is unresolved, so the finder uses the lower figure. TP25 and EP40M each have separately documented 0.5 hp ceilings. HS300 V1 and KP115 V1 do not have a separate motor ceiling in the checked sources and therefore do not satisfy this option. These ratings are not interchangeable: P110M adds a Matter path, P316M puts six AC outlets behind one shared rating, and outdoor units have distinct mounting instructions. Inspect the motor nameplate and switching guidance. Compare P105, P110, P110M two-pack route, P110M four-pack, P115 two-pack, P115 four-pack, P316M, TP25, P400M, P125 and EP40M, then filter for the documented 1/6 hp motor class.

Finder answer: dimmable lamps only

Three current profiles match the dimmable-lamps-only choice: indoor P135 KIT and outdoor P430M and Meross MPD100HK. They have different layouts, installation instructions and lighting limits.

P135 KIT dims two matched lamps together using leading-edge TRIAC; P430M and MPD100HK each control one compatible outdoor light. Meross states the MPD100HK's separate ceilings as 400 W incandescent and 150 W LED/CFL and requires a dimmable bulb; those figures are not a general appliance or motor rating. P430M's sheet gives its own bulb limits, so do not transfer one dimmer's table to another. The earlier outdoor Kasa KP405 is a separate edition. None of the three current dimmers is a general-resistive relay or a motor match. Read the P135 KIT V1.6 assessment, P430M assessment and MPD100HK review, then show the default-current dimmable-lamp match set or show all current dimmable-lamp matches.

With earlier editions included, Shelly Plus Plug US SNPL-00116US carries a retailer-stated 1,800 W screen at 15 A and nominal 120 V: it passes at 1,800 W and is excluded at 1,810 W. That published general-use ceiling is not a motor-start rating. Read the Plus Plug US assessment and compare the same earlier-edition condition at 1,800 W and 1,810 W.

Numeric answer: appliance wattage

The base MSS110 US/JP, MSS110HK, all six white/black Shelly Plug US Gen4 package routes and Wave Plug LR publish a 1,800 W ceiling; Gen4 specifies resistive loads only, while Wave LR sources conflict on voltage and do not state a motor horsepower ceiling. Compare black single, black 2-pack, black 4-pack, Wave Plug LR. Compare the MSS110 US/JP single-plug rating, the MSS110HK per-plug rating, the Shelly Gen4 single, 2-pack and 4-pack, the MSS315 15 A-only documentation and the MSS425FHK shared strip limit; inspect the 1,800 W and 1,810 W numeric cases.

For TP15 V1, 1,800 W at 120 V is documented per plug: all three package routes meet the 1,800 W input, while the 1,810 W step returns no current profile. Meross MSS115 adds a 15 A per-plug output at 120 V, an arithmetic 1,800 W ceiling, and its 2-pack does not multiply that rating. TP25, HS300 and KP115 also have a documented 1,800 W-at-120-V comparison ceiling; none multiplies the value by outlet or pack count.

The numeric-only 1,800 W result includes TP25, HS300 and KP115 and the MSS115 per-plug arithmetic ceiling where no location or load-class condition is selected; 1,810 W removes them. P400M adds another outdoor general/resistive route at the same threshold. This numeric screen is not a load-class approval: the MSS115 source does not publish a motor horsepower or general/resistive tag, MSS620BHK's two sockets share a device limit but lack a per-socket rating, and MPD100HK has separate bulb-type limits rather than one general 120 V maximum. P306's wattage does not establish class, HS300 has no V1 motor HP value, and P110M/P115 have separate incandescent ceilings. P430M's 125 V lamp values are not substituted for general 120 V appliance watts. Review the MSS115, MSS620BHK, MPD100HK, P306, P316M, P400M, TP25, HS300 V1, KP115 V1, P430M, P105, P110, P110M two-pack route, P110M four-pack, P115 two-pack, P115 four-pack, KP125MP4, EP25P2 and EP40M, then compare 1,800 W with 1,810 W in the finder.

Shelly's white single, 2-pack and 4-pack each retain a per-device 1,800 W figure for resistive loads only; package count does not combine those limits. Compare the single, 2-pack and 4-pack reviews and run the same-condition 1,800 W or 1,810 W finder case.

No current assessed product documents a numeric 120 V watt ceiling of at least 1,810 W; that is a boundary in this library, not proof that no suitable model exists elsewhere.

The earlier Shelly Plus Plug US has a manufacturer-listed 15 A maximum. A 15.0 A numeric requirement fits that published ceiling; the 15.1 A step does not, and neither figure establishes a motor or compressor rating. Compare the SNPL-00116US review and the same earlier-edition finder screen at 15.0 A and 15.1 A.

MSS315, base-model MSS110 US/JP, MSS110HK, all six Shelly Gen4 package routes and Wave Plug LR publish a 15 A per-plug maximum, while MSS425FHK’s 15 A rating is strip-wide; package counts do not pool current and none of these current values establishes motor approval. Compare the white single, white 2-pack, white 4-pack, black single, black 2-pack, black 4-pack and Wave Plug LR before applying a current ceiling.

Numeric answer: appliance current

For original MSS620 US, a 10.0 A requirement meets its published 10 A single-socket maximum and the 10.1 A step does not; MSS425F US/JP and MSS630 US publish 15 A whole-device maxima. Read their MSS620, MSS425F and MSS630 assessments, and compare the same unfiltered current field at 10.0 A and 10.1 A. This rating screen is not appliance or motor approval.

MSS315, base-model MSS110 US/JP and MSS110HK each publish 15 A per plug, while MSS425FHK publishes 15 A for its whole strip; these models fail a 15.1 A requirement. A current label is not a motor rating. Compare the MSS315, MSS110 US/JP, MSS110HK and MSS425FHK sources and the 15 A/15.1 A boundary.

MSS315, base-model MSS110 US/JP, MSS110HK, all six white/black Shelly Gen4 package routes and Wave Plug LR publish a 15 A per-plug maximum, while MSS425FHK’s 15 A rating is strip-wide; package counts do not pool current and none of these current values establishes motor approval. Compare black single, black 2-pack, black 4-pack, Wave Plug LR. Compare the Shelly Gen4 single, 2-pack and 4-pack reviews, then test the same current ceiling at 15 A and 15.1 A.

TP25, HS300, KP115 and each MSS115 plug document 15 A maximum, so they meet the 15 A input; 15.1 A exceeds that limit. The two MSS115 units remain separate. The separate dimmer-specific 2.5 A boundary is for lamps, not general appliance or motor approval.

Compare the distinct cases in the MSS115, TP25, HS300 V1 and KP115 V1 assessments; layouts and source limits differ even where the numeric current is shared. The MSS115 rating does not provide a motor HP class.

No current eligible profile has a documented maximum of at least 15.1 A; profiles with unknown current do not count as supporting that requirement.

Original MSS620 US first passes at 10.0 A per socket; the 10.1 A step exceeds that exact 10 A single-socket ceiling, even though the whole plug is rated 15 A. MSS425F US/JP and MSS630 US publish 15 A device maxima, not separate per-socket values. Compare the MSS425F strip, original MSS620 and MSS630 evidence before treating the numeric field as a load approval.

Original MSS620 US first passes a 10.0 A appliance-current entry, while the 10.1 A step exceeds its 10 A single-socket cap; MSS425F and MSS630 publish a 15 A whole-device maximum. Compare the same Apple Home/routine context at 10 A and 10.1 A, then the 15 A ceiling at 15 A and the no-match 15.1 A step. The exact no-match explanation is: No current eligible profile has a documented maximum of at least 15.1 A; profiles with unknown current do not count as supporting that requirement. This assessed-library result is not a market-wide conclusion.

Exact current-threshold finder cases: 2.5 A, 2.6 A, 15 A and 15.1 A. These numeric filters do not replace load-class and appliance checks.

Compare the exact model limits and review evidence for P135 KIT; amperage and load class are separate questions.

Compare the exact model limits and review evidence for P400M; amperage and load class are separate questions.

Compare the exact model limits and review evidence for P306; amperage and load class are separate questions.

Compare the exact model limits and review evidence for P316M; amperage and load class are separate questions.

Compare the exact model limits and review evidence for EP40M; amperage and load class are separate questions.

The P135 KIT’s 2.5 A limit is for matched dimmable lamps and it drops out at the 2.6 A query; it is not a general switch. TP15’s 15 A is a per-plug cap in every pack, not a bundle total.

Outdoor placement and the conservative one-sixth-horsepower boundary

With outdoor use and a motor-class requirement, 0.166 hp matches EP40M, P400M and TP25; at 0.167 hp the P400M drops out but EP40M and TP25 remain because their separate limits are 0.5 hp.

The P400M live product page says 1/2 hp, a conflicting claim that does not bridge the selected route to the seller's exact hardware version; confirm the unit label with TP-Link. TP25's V1.6 sheet separately rates its motor ceiling at 1/2 hp. EP40M also has a separate 0.5 hp limit, but each appliance still must fit its own instructions and starting demand. Read the P400M discrepancy, TP25's V1.6 motor limit and EP40M's motor details; compare outdoor, 1/6 hp class at 0.166 with the next 0.001 hp input at 0.167.

Combining outdoor use, a general load and the 1,800-watt ceiling

Outdoor location, a general/resistive load and a numeric maximum of 1,800 W match EP40M, P400M and TP25; a 1,810 W requirement returns no current outdoor profile.

No reviewed outdoor general/resistive arrangement documents 1,810 W at 120 V; this is a boundary in the assessed library, not a claim about every product on the market.

P400M and TP25 are documented for general/resistive use at 15 A/1,800 W at 120 V, each with a shared two-socket rating and a separate motor caveat; the P400M motor value is disputed, while TP25 V1.6 says 1/2 hp. EP40M is a distinct dual-socket product with its own electrical table. The P430M is excluded because it is a dimmer for compatible lights, not a general appliance relay. This filter is a source-backed ceiling, not permission to exceed an appliance instruction or ignore startup behavior. Compare P400M, TP25, EP40M and why P430M is excluded, then test outdoor + general/resistive + 1,800 W against the next 10 W input.

Shelly lists resistive, capacitive and inductive load classes for the Plus Plug US but no motor horsepower ceiling. Its 15 A and retailer-stated 1,800 W figures therefore cannot satisfy a numeric motor requirement; check the exact-model review and see that model excluded from the same earlier, indoor motor screen at 0.1 hp.

Numeric answer: motor horsepower

With outdoor use and the motor-class filter, 0.166 hp returns EP40M, P400M and TP25; 0.167 hp returns EP40M and TP25, 0.5 hp still returns both, and 0.501 hp returns no current outdoor profile. Separately, TP15 V1’s indoor 1/6 hp ceiling matches at 0.166 hp but not at 0.167 hp; the indoor witness links show that distinct condition.

P400M's support-linked V1.6 sheet says 1/6 hp but its current family page says 1/2 hp; the selected route does not bridge the seller's exact suffix, so this finder uses the conservative sheet value. TP25's V1.6 sheet and EP40M sources separately document 0.5 hp ceilings. Do not convert current or watt ratings to horsepower, multiply ratings by socket count, or infer startup tolerance. Confirm the product label and motor instructions. Read the P400M discrepancy, TP25's motor limit, EP40M's motor evidence, P316M's shared rating and P110M's 1/6 hp route; compare outdoor motor at 0.166 hp with the next step, 0.167 hp, then 0.5 hp with 0.501 hp.

No current outdoor motor profile documents a motor ceiling of at least 0.501 hp; this is not a market-wide claim.

Combining an indoor motor with the one-sixth-horsepower boundary

For an indoor motor requirement, 0.166 hp matches fifteen configurations, including all three TP15 V1 pack routes with a documented 1/6 hp ceiling; one valid 0.001 hp input step higher, 0.167 hp, removes all indoor candidates in this checked set.

One-sixth horsepower is approximately 0.1667 hp, so the form's 0.001 hp step makes 0.166/0.167 a meaningful boundary pair. At 0.166 hp the set includes two P105 and P110M package routes, two P115 routes, P110 V1, P125/P125M configurations and the six-outlet P316M strip. Do not round the motor nameplate to create a fit; check starting demand, the shared strip rating and appliance instructions. Review the P105, P110, P110M two-pack, P110M four-pack, P115 two-pack, P115 four-pack, P316M and P125, then compare indoor motor at 0.166 hp with the same motor class at 0.167 hp.

No current indoor profile with a documented motor ceiling of at least 0.167 hp matches this scenario; this is a boundary in the checked set, not proof none exists elsewhere. At 0.167 hp in this indoor motor scenario, the reviewed Tapo models no longer meet their documented ceiling; do not change the appliance rating or disregard its instructions.

Combining an indoor location with a motor load

Indoor placement plus a motor-class requirement at 0.166 hp leaves fifteen current configurations: twelve other Tapo profiles and all three TP15 V1 pack routes, each with the same documented 1/6 hp per-plug ceiling. At 0.167 hp none of these indoor candidates matches.

The matcher applies environmental and motor requirements to the same reviewed configuration. P105, P110, P110M, P115, P125, P125M and P316M have different app, outlet and package details despite sharing this separate 1/6 hp ceiling. P316M's six AC outlets share the strip's total electrical rating; they are not six separate 1/6 hp channels. Read P105, P110, P110M two-pack, P110M four-pack, P115 two-pack, P115 four-pack, P316M and P125, or apply indoor and motor requirements together.

Interaction answer: include earlier editions with an indoor motor load

At 0.166 hp, this earlier-inclusive indoor motor screen returns 18 documented profiles, including HS103P2 V3 and KP303 V1; at 0.167 hp it returns none.

The HS103P2 V3 product specification and KP303 V1 US manual state separate 1/6 hp motor limits; neither figure is inferred from a general-resistive current or watt ceiling. The HS103P2 is a two-pack of individual plugs while KP303 is one strip with three separately controlled AC outlets, so the common horsepower number does not make them the same setup. Both are earlier routes and require opting into earlier editions. At 0.167 hp, no profile in the assessed library has a documented indoor motor ceiling that high; this is not a market-wide claim. Compare the HS103P2 V3 package assessment and KP303 V1 strip assessment, and run the complete case at 0.166 hp or the next valid 0.001 hp step, 0.167 hp. Check the appliance's own motor instructions and startup requirements before use.

Combining an indoor Kasa setup with both watt and current limits

With earlier editions included, indoor Kasa control, a general/resistive load, 1,800 W at 120 V and a 15 A current cap match eight profiles, including the HS103P2 V3 pair and KP303 V1 strip.

Each threshold is a separate manufacturer limit, not a value that can be added across two plugs or outlets. HS103P2's two-package units are each rated 15 A and 1,800 W general use; KP303's three outlets share its strip limit. Check an appliance's own current, wattage and motor instructions rather than treating the finder as electrical approval. Compare the HS103P2 V3 two-pack, KP303 V1 strip and KP115 V1 plug, then open the same-condition 1,800 W / 15 A finder set.

Keeping those earlier, indoor, general-load, Kasa and 15 A conditions unchanged but raising the watt requirement to 1,810 W leaves no matching profile in this assessed library. Check the same setup at 1,810 W and 15 A.

Keeping the 1,800 W requirement instead and raising current to 15.1 A likewise leaves no match in this assessed library. Check the same setup at 1,800 W and 15.1 A.

An empty result here marks a documentation boundary in this partial library; it does not show that no suitable plug exists elsewhere or authorize exceeding an appliance's instructions.

Requiring indoor use, general/resistive support and a 1,800 W ceiling leaves twenty-seven profiles, including the white and black Shelly Plug US Gen4 packages and Wave Plug LR; each Gen4 device is resistive-only, while Wave LR’s voltage sources disagree and neither family supplies a documented motor horsepower ceiling. Compare the black single, black 2-pack, black 4-pack and Wave Plug LR; use the exact same-condition finder link in this section.

Combining load type, location and wattage

Requiring indoor use, general/resistive support and a 1,800 W ceiling leaves twenty-seven profiles, including the black Gen4 packages and Wave Plug LR alongside the separate TP15 V1 package routes, HS300 V1 and KP115 V1. The three TP15 listings represent one, two or three plugs; each retains its per-plug 1,800 W maximum.

The twenty-seven-profile result includes Kasa EP10, EP25P2, HS300, KP115 and KP125MP4, Tapo P105, P110, P110M, P115, P125, P125M and P316M packages, the separate Shelly Gen4 white and black packages, and Wave Plug LR. Gen4’s 1,800 W limit is explicitly for resistive loads, with no documented motor horsepower ceiling; Wave LR’s current US page and exact manual disagree on nominal voltage, and its sources do not specify motor horsepower. P306 does not enter this three-part match because its reviewed source set does not establish a supported general/resistive class; a numeric watt figure alone is not such evidence. That does not mean the matching profiles fit every appliance: HS300's six smart AC outlets share a strip-wide ceiling, while KP115 is a single plug; P110M/P115 have a separate 8 A incandescent and 1/6 hp motor ceiling; P105 lists lower examples for some loads; P316M's outlets also share one rating. Review P105, P110, P110M two-pack, P110M four-pack, P115 two-pack, P115 four-pack, P316M, HS300, KP115, KP125MP4, EP25P2, Shelly white single, white 2-pack, white 4-pack, black single, black 2-pack, black 4-pack and Wave Plug LR, then run the complete three-part finder.

Requiring indoor use, general/resistive support and a 1,800 W ceiling leaves twenty-seven profiles, including the three Shelly Plug US Gen4 white packages; each device’s limit is 1,800 W for resistive loads only, with no documented motor horsepower limit.

Combining a lamp-dimming task with location and control app

For an indoor dimmable-lamp task with Tapo-app control, only P135 KIT matches; current outdoor dimming with Tapo control instead matches P430M, while an earlier outdoor Kasa-app setup matches KP405 V1.

The same word “dimmer” does not erase different device roles. P135 is an indoor kit with a matched lamp pair on two outlets and a bundled wireless button; P430M is a current single-light outdoor dimmer with 125 V bulb limits; KP405 is an earlier outdoor lighting dimmer with its own bulb ceilings and instructions. None is a general appliance plug. Check the exact bulb type, dimming method, paired-load requirement, location and seller revision. Read the P135 KIT assessment, P430M assessment and KP405 V1 assessment; use indoor dimming with Tapo control and earlier editions hidden, current outdoor P430M with Tapo control or include the earlier outdoor Kasa dimmer setup.

Combining a 15 A current ceiling with a motor requirement

At 15 A, the indoor motor-class finder retains fifteen profiles with their own motor evidence, but excludes MSS110HK, MSS315 and MSS425FHK because none has a documented matcher motor class. Compare P110M's 1/6 hp documentation, the TP15 V1 1/6 hp route and the P316M shared strip limit with the Meross MSS110HK, MSS315 and MSS425FHK evidence; apply all four requirements together.

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