Shelly Plus 1PM

CAUTION: This is a high voltage device. Please make sure to reach out to a Professional Electrician for installation.

By far, this is one of the most utilized Shelly Relays from the entire Shelly lineup. The Shelly Plus 1PM is equipped with an ESP32 module and the pairing is very quick.

Shelly Plus 1PM is a small form factor smart relay with power measurement, which allows remote control of electric appliances through a mobile phone, tablet, PC, or home automation system (like Home Assistant). It can work standalone in a local Wi-Fi network or it can also be operated through cloud home automation services.

Shelly Plus 1PM can be accessed, controlled and monitored remotely from anywhere as long as you have internet connectivity (the device also required to be connected to the Wi-Fi router and the Internet).

It can be retrofitted into standard electrical wall boxes, behind power sockets and light switches or other places with limited space.

Shelly Plus 1PM has embedded Web Interface which can be used to monitor and control the device, as well as adjust its settings.

Safety features

  • Overheating protection
  • Overvoltage protection
  • Overcurrent protection
  • Overpower protection

Supported load types

  • Resistive (incandescent bulbs, heating devices)
  • Capacitive (capacitor banks, electronic equipment, motor start capacitors)
  • Inductive with RC Snubber (LED light drivers, transformers, fans, refrigerators, air-conditioners)

Simplified Internal Schematics


  • 1 switch/button input on screw terminal
  • 5 power supply inputs on screw terminals: 2 N (+) and 3 L (Ʇ)


  • 1 relay outputs with power measurement on screw terminal

Detailed Specifications

Physical Size (HxWxD):37x42x16 ±0.5 mm / 1.46×1.65×0.63 ±0.02 in
Weight:27 g / 0.95 oz
Mounting:Wall console
Screw terminals max torque:0.4 Nm / 3.5 lbin
Conductor cross section:0.5 to 1.5 mm² / 20 to 16 AWG
Conductor stripped length:5 to 6 mm / 0.20 to 0.24 in
Shell material:Plastic
Ambient temperature:-20 °C to 40 °C / -5 °F to 105 °F
Humidity30 % to 70 % RH
Max. altitude2000 m / 6562 ft
Power supply:110 – 240 VAC / 24 – 30 VDC
Power consumption:< 1.2 W
Output circuits ratings 
Max switching voltage AC:240 V
Max switching voltage DC:30 V
Max switching current AC:16 A
Max switching current DC:10 A
Sensors & meters 
Temperature sensor:Yes
Voltmeter (AC)Yes
Ammeter (AC)Yes
Wi-Fi Protocol:802.11 b/g/n
Frequency:2412 – 2472 МHz; (Max. 2495 MHz)
Max. RF output power:13.38 dBm
Range:Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors(Depends on local conditions)
Bluetooth Protocol:BLE 4.1
Frequency:2402 – 2480 MHz (Max. 2483.5 MHz)
Max. RF output power:4.93 dBm
Range:Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors(Depends on local conditions)
Flash:4 MB
Firmware capabilities 
Webhooks (URL actions):20 with 5 URLs per hook

Wiring Diagram


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