4-channel 12 V relay module with optical isolation for Arduino, ESP32 and automation systems

4-channel relay module with 12 V coils and optocoupler input isolation for controlling four high-power loads from a microcontroller.

Product code	13347
Category	Modules and Boards (PCB), Arduino
In stock	Only 4 left

125 TL

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§ 01 — Specifications

Relay coil supply voltage	12 V DC
Number of channels	4
Relay	JQC3F-12VDC-C
Maximum load	10 A 250 V AC / 30 V DC
Input isolation	optocouplers, JD-VCC jumper
Board dimensions	approx. 75 × 55 mm

§ 02 — Description

The 4-channel 12 V relay module lets you independently control four high-power loads — lighting, pumps, fans, electric actuators — from signals sent by Arduino, ESP32 and other microcontrollers. The board carries four JQC3F-12VDC-C relays. Each channel has an optocoupler on its input, a protection diode, an indicator LED and a 3-pin screw terminal (NO, COM, NC). Control connections are made through a pin header: GND, IN1–IN4, VCC. The JD-VCC jumper lets you power the relay coils from a separate 12 V source, fully isolating the power section from the microcontroller. Specifications: Relay coil supply voltage: 12 V DC Number of channels: 4 Relay: JQC3F-12VDC-C Load rating printed on relay: 10 A 250 V AC / 125 V AC, 10 A 30 V DC / 28 V DC Input isolation: optocouplers Load contacts: NO, COM, NC on each channel Control header: GND, IN1, IN2, IN3, IN4, VCC Board dimensions: approx. 75 × 55 mm