Description Unit SSR is a solid-state relay unit integrated with MOC3043M optocoupler isolation and zero-crossing detection. The Unit SSR accepts a 3.3-5V DC control signal and switches a single-phase 220-250V AC output, making it a compact Grove-connected relay option for M5 controller projects. Compared with ordinary mechanical relays, the Unit SSR uses power semiconductor devices for microsecond-level switching and built-in overcurrent protection. With no physical contacts, the Unit SSR offers long service life, high reliability, low noise, high sensitivity, and better adaptation to demanding environments such as severe vibration. Notes Be cautious when using high-voltage AC loads; do not operate with power on. This relay is only suitable for AC loads. Features Unit SSR zero-crossing solid-state relay for single-phase AC switching. Built-in MOC3043M optocoupler isolation with zero-crossing detection. Built-in overcurrent protection with a 2A fuse. Supports 3.3-5V DC control signal and 220-250V AC switching voltage. Grove interface for quick connection to M5 controllers. Supports UIFlow graphical programming for remote relay control with an M5 controller. Specifications Specification Parameter 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 Package Size 138.0 x 93.0 x 11.2mm Gross Weight 16.5g Applications Motor control. Industrial and household lighting. Heating and static switching. Stage lighting. Medical equipment and traffic lights. Frequent-switching AC control tasks that need fast response and quiet operation. Product List 1 x Unit SSR 1 x HY2.0-4P Grove cable (20cm) 1 x VH3.96-4P Terminal Other Content Solid-State Relay Advantages Faster switching speed with no physical contact wear. Completely silent operation. No electrical sparks, suitable for complex environments. Longer lifespan. Smaller size. PinMap HY2.0-4P Black Red Yellow White PORT.B GND 5V DIN NC Control Setup The Unit SSR can be driven through the Grove interface from a compatible M5 controller. In software, the relay state is controlled by changing the output signal connected to the DIN pin. Resources Unit SSR product document Unit SSR schematic image Unit SSR model size image BT136S thyristor datasheet MOC3043M optocoupler datasheet Unit SSR UiFlow2 API documentation Unit SSR PDF document FAQ What type of load can Unit SSR control? The Unit SSR is designed for AC loads only. It supports single-phase 220-250V AC switching with a maximum load current of 2A. Can Unit SSR be used with DC loads? No. The product note states that the Unit SSR is only suitable for AC loads. What control signal does Unit SSR use? The Unit SSR uses a 3.3-5V DC control signal through the HY2.0-4P Grove interface on PORT.B. Why use Unit SSR instead of a mechanical relay? The Unit SSR provides faster switching, silent operation, no electrical sparks, longer lifespan, and smaller size compared with mechanical relays. What is included with Unit SSR? The package includes 1 x Unit SSR, 1 x HY2.0-4P Grove cable (20cm), and 1 x VH3.96-4P Terminal.
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