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


PowerSSR Tail
PN 80125: $19.99 ea
In Stock

An isolated dc-actuated power cord for controlling power to 120vac appliances from a microcontroller I/O pin (3-12vdc, 3-30ma).

  • Solid-state triac switching; longer service life, no audible contact click and faster response time.
  • Controls power to loads up to 300 watts, non-inductive, with a 3vdc (3ma) to 12vdc (30ma) steady or pulsed control signal.
  • Provides random (not zero-cross) switching suitable for 120vac phase-control dimmer applications for incandescent and LED light strings. Use the ZeroCross Tail to safely obtain the necessary zero-crossing sync pulse. Arduino sample sketch or variable dimmer . Video demo.
  • Connects directly to I/O pin of the Arduino, Raspberry Pi, Beaglebone or other 3.3 or 5 volt MCU. 
  • 5300vrms isolation between ac circuit and signal connection.
  • Built-in LED indicates status of control signal.
  • No exposed 120vac voltages and no dangerous 120vac wiring required. Can be installed by non-technical users:  Instruction sheet .
  • Plugs into standard 120vac 3-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, 300 watts maximum continuous load, non-inductive.
  • Switching device: Solid-state triac.
  • DC input: 3-12vdc (3-30ma), terminal block accepts #14-30 AWG wire..
  • Operate times: Suitable for 60hz phase control of incandescent and LED light strings.
  • DC to ac circuit isolation: Optically isolated >5,000vrms.
  • Indicator: LED indicates when dc side is energized.
  • Protection: AC side protected with 150vac MOV. DC side is transient free.
  • Mounting: Two #6 screws or free standing.
  • Environment: Indoor use only.

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