PCs 3V Relay Module Power Switch Board Optocoupler Isolation Drive Control Board 1 Channel (High Level Trigger) DC 3-3.3V

Optocoupler Isolation: The 1-channel DC 3-3.3V relay power switch module adopts the EL817 optocoupler isolation design, improving anti-interference performance and ensuring stable signal transmission. High Load Capacity: Supports AC 250V/10A or DC 30V/10A, and each relay typically has open and normally closed contacts. Selectable via jumper, relay, TTL, or ground. Widely Compatible: Compatible with DC 3V~3.3V control signals, suitable For ESP8266, ESP32, NodeMCU, Arduino, Raspberry Pi, MCU control board, ARM/PIC/AVR series and various microcontrollers. High-level signals (>1.3V) can be triggered, ideal for 3.3V logic devices, equipped with a signal output LED indicator; the interface is clearly marked VCC/GND/IN (signal end) and NO/COM/NC (relay end). Durable and safe: built-in diode fill protection, response time less than 20ms, mechanical lifespan > 100,000 times.