M5Stack U122 UNIT SSR Solid-State Relays

m5Stack U122 UNIT SSR Solid-State Relays are different from traditional electromagnetic relays in that the switching life is much longer than that of electromagnetic relays. Integrated MOC3043M optocoupler isolation and zero-crossing detection support input 3.3V to 5V DC control signal and control-output output single-phase 220-250V AC power.

Power semiconductor devices control the m5Stack U122 UNIT SSR, with microsecond on/off speed and built-in overcurrent protection. Extensively used in lighting control, CNC machine tools, etc., where frequent on/off lines and fast response are required. The user must be careful when using high voltage AC loads and do not operate with electricity. This relay is for AC loads only.


  • Over-zero type SSR
  • Built-in over-current protection
  • Built-in optocoupler isolation, with over-zero detection
  • High speed, Low noise, Durable, high reliability, high sensitivity
  • More convenient to access with GROVE interface
  • Supports UIFlow graphic programming, realizing the relay remote control with M5 controller in 3 mins


  • SCR model - BT136S
  • Optocoupler isolation model - MOC3043
  • 3.3V to 5V DC control signal
  • 220-250V AC on/off voltage
  • 2A max. load current
  • Number of control channels - 1
  • 2A overcurrent protection fuse
  • -10 to +80°C operating temperature
  • Net weight (52g)
  • Gross weight (70g)
  • 54mm x 54mm x 16mm product dimensions
  • 75mm x 60mm x 20mm package size

Kit Contents

  • 1x unit SSR
  • 1x HY2.0-4P cable


  • Motor control
  • Industrial and domestic lighting
  • Heating and static switching
  • Stage lighting
  • Medical equipment, traffic signal lights
Publicado: 2021-10-26 | Actualizado: 2022-03-11