Name: Solid State Relay Unit (BT136S)
Brand: M5Stack

U122 · M5Stack

Unit SSR is a solid-state relay integrated with MOC3043M optocoupler isolation and zero-crossing detection. It supports a 3.3-5V DC control signal to control a single-phase 220-250V AC power output. Combined with the M5 controller and the UIFlow programming platform, it can easily achieve remote control. Compared to ordinary mechanical relays, this solid-state relay uses power semiconductor devices for control, offering microsecond-level switching speed and built-in overcurrent protection.… (M5Stack U122)

Part number	U122
Manufacturer	M5Stack
Category	Relays › Relay Modules
Pins	4
Voltage (max)	250 V
Voltage (min)	3.3 V

Solid State Relay Unit (BT136S) pinout

Pin	Name	Type	Description
1	SIG1	bidirectional	PORT.B: GPIO/analog; PORT.C: UART - see the unit's pin map
2	SIG2	bidirectional	PORT.B: GPIO/analog; PORT.C: UART - see the unit's pin map
3	5V	power
4	GND	ground