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A safer way for Makers and DIY'ers to control mains ac power with a microcontroller.

PowerSwitch Tail II
PowerSwitch Tail II Kit
240vac Kits
16-ch PWM Controller
PowerSSR Tail
ZeroCross Tail
PowerState Tail
CB500 Circuit Breaker
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 (PN 85010)
$29.99 each
In stock!

PowerSSR and ZeroCross Tails in one power cord for phase-controlled power to 120vac non-inductive loads with a microcontroller
  • Combines the features of our PowerSSR and ZeroCross Tails into one power cord device.
  • PowerSSR function provides fast solid-state triac switching suitable for ac dimmers and motor speed control.
  • Control loads up to 450 watts, non-inductive, with a 3vdc (3ma) to 12vdc (30ma) steady or pulsed control signal.
  • Integrated zero-crossing detector has open collector output adaptable to microcontroller logic level.
  • Simple 3-wire low-voltage connections: PSSR in, Common, ZeroCross out. See instructions.
  • Local LED indicator shows status of control voltage.
  • No exposed 120vac voltages and no dangerous 120vac wiring required. Plugs into standard NEMA 5-15R/P 120vac 3/2 prong household outlets, power strips and extension cords.


  • AC input: NEMA 5-15P Plug, standard 120vac with ground.
  • AC output: NEMA 5-15R Receptacle, standard 120vac with ground.
  • Load capacity: 120vac, 450 watts maximum continuous load, non-inductive.
  • Switching device: Solid-state triac, indefinite life expectancy.
  • DC input: 3vdc @3ma to 12vdc @ 30ma, terminal block accepts #14-30 AWG wire.
  • ZeroCross output: Open collector. Requires a resistor connected to the supply voltage of the microcontroller. Not to exceed 30vdc. Positive going sync pulse to supplied voltage.
  • Operate times: Suitable for 50/60hz phase control of incandescent and LED light strings.
  • DC to ac circuit isolation: Optically isolated to 5300Vrms.
  • Indicator: LED indicates when dc side is energized.
  • Protection: AC side protected with 150vac MOV; DC side is transient free.
  • Mounting: Two #6 screws on 2" x 2.5" grid or free standing.
  • Indoor use only.

Our liability is limited to the purchase price of this product only. By using this product you agree that, LLC can not be held liable for any damages or injuries resulting from use, misuse, or repair. This product is for indoor use only.