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12V Relay Module - 2/4/8 Channel with High/Low Trigger & Optocoupler

Name: 12V Relay Module | 2/4/8 Channel | High/Low Trigger
Brand: Sun Cheong Computer Company Limited
SKU: 21PS002244
Price: 15.0 HKD
Availability: InStock

12V Relay Module - 2/4/8 Channel with High/Low Trigger & Optocoupler

HK$15.00

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Type 12V 2 Channel 12V 4 Channel 12V 8 Channel

Delivery Options

Local delivery within Hong Kong and in-store pickup.
Free shipping for orders of HK$400 or above; HK$35 shipping fee for orders below HK$400.
Shipped by SF Express, usually dispatched the same day for orders confirmed before 6:00 PM (Mon–Sat).
Estimated delivery time: 1–3 business days after dispatch (Hong Kong).
In-store pickup details (location and time) will be confirmed by email or phone message.
Delivery times are estimates and may be affected by weather or unforeseen circumstances.

Take Control of Your High-Power Projects

Unlock the potential of your microcontroller with our 12V Opto-Isolated Relay Module. Whether you're a hobbyist working with an Arduino, Raspberry Pi, ESP32, or a professional building a custom automation system, this module provides a safe and reliable way to control high-voltage and high-current devices like lights, motors, fans, and solenoids.

Available in 2, 4, or 8-channel configurations, you can choose the perfect fit for your project's needs.

Key Features

Flexible Channel Options: Choose from 2, 4, or 8 channels to match the scale of your project, from simple a simple switch to complex multi-device automation.
High/Low Level Trigger (Selectable): A built-in jumper allows you to set each channel to trigger on either a HIGH signal (e.g., 3.3V/5V) or a LOW signal (0V/GND). This provides maximum compatibility with virtually any microcontroller.
True Optocoupler Isolation: Each relay channel is equipped with a genuine optocoupler, creating an electrical barrier between your delicate microcontroller and the high-power output circuit. This protects your logic board from voltage spikes and ground loop interference.
High-Current Relays: Equipped with high-quality Songle SRD-12VDC-SL-C relays, each channel can handle heavy loads up to 10A at 250VAC or 10A at 30VDC.
Status Indicator LEDs: Each channel has two onboard LEDs: a power indicator (Green) and a relay status indicator (Red) that lights up when the relay is active, making debugging your circuit a breeze.
Stable & Reliable: Features screw terminal blocks for secure input and output connections, and mounting holes for easy installation in your enclosure.

How to Use the High/Low Trigger

This module offers maximum flexibility with its trigger selection:

Locate the Jumper: Find the 3-pin jumper block for the module (or for each channel on multi-channel boards).
Set to Low Level Trigger: Place the jumper cap to connect the L pin and the COM pin. The relay will activate when your I/O pin sends a LOW (0V) signal.
Set to High Level Trigger: Place the jumper cap to connect the H pin and the COM pin. The relay will activate when your I/O pin sends a HIGH (e.g., 5V) signal.