Hoembpn 5 Pcs 3V Relay Module Power Switch Board 1 Channel Optocoupler Isolation Drive Control (High Level Trigger) DC 3 3.3V for IoT ESP8266 Microcontroller Development

Optocoupler Isolation: The DC 3-3.3V 1-channel relay power switch module adopts the EL817 optocoupler isolation design, enhancing anti-interference performance and ensuring stable signal transmission. High load capacity: Supports AC 250V/10A or DC 30V/10A load, and each relay usually has open and normally closed contacts. Selectable by jumper, relay and 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 Triggering: High level signal (>1.3V) can be triggered, ideal for 3.3V logic devices, equipped with 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 backfill protection, response time less than 20ms, mechanical life ≥ 100,000 times.