M5Stack Solid State Relay Unit

The M5Stack Solid State Relay Unit (SSR) enables fast, reliable AC switching with optocoupler isolation and zero-cross detection. Supporting 3.3-5V control signals, it’s ideal for remote automation projects, lighting control, and CNC applications requiring silent, high-speed switching.

The M5Stack Solid State Replay 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.

It has no physical contacts, long lifespan, high reliability, and can adapt to complex working environments such as severe vibrations. It is used in scenarios requiring frequent switching and fast response, such as lighting control and CNC machine tools.

Features

• Zero-crossing SSR
• Built-in overcurrent protection
• Built-in optocoupler isolation with zero-crossing detection
• Fast speed, low noise, long lifespan, high reliability, and high sensitivity
• Uses GROVE interface for easier connection
• Supports UIFlow graphical programming, enabling remote control of the relay with an M5 controller in just 3 minutes

Specifications

Thyristor Model	BT136S
Optocoupler Model	MOC3043
Control Signal	3.3-5V DC
Switching Voltage	Single-phase AC: 220-250V
Maximum Load Current	2A
Control Channels	1
Overcurrent Protection	Fuse: 2A
Operating Temperature	-10 ~ 80°C
Product Size	56.0 x 24.0 x 10.2mm
Product Weight	8.3g

Warning

• Be cautious when using high-voltage AC loads; do not operate with power on.
• This relay is only suitable for AC loads.

Resources

• Product documentation

Package Contents

• 1x M5Stack Solid State Relay Unit (BT136S)
• 1x HY2.0-4P Grove cable (20cm)
• 1x VH3.96-4P Terminal