4CH 5V RELAY MODULE

The 4-Channel 5V Opto-Isolated Relay Module allows microcontrollers (Arduino, AVR, PIC, ARM, Raspberry Pi, etc.) to switch high-current and high-voltage loads. Each relay is individually controlled via an opto-isolated digital input, switchable by 1.0V–5V signals. Supports both high-level and low-level trigger modes. Each relay has one normally open (NO) and one normally closed (NC) contact.

Note: Relay model may be JQC3F-5VDC-C, SRD-05VDC-SL-C, or FL-3FF-S-Z — supplied randomly.

Features:

1. 4 independent opto-isolated relay channels
2. Normally open (NO) and normally closed (NC) contacts per relay
3. Triode driver with pull-down circuit to prevent false triggering
4. Power and control indicator LEDs per channel
5. Control and load areas isolated per international safety standards
6. Supports DC and AC load control (up to 220V AC)