1-Channel Relay Module 3.3V 5V 12V 24V High/Low Level Trigger
1-Channel Relay Module 3.3V 5V 12V 24V High/Low Level Trigger
1-Channel Relay Module – Versatile Multi-Voltage Trigger Board
Take full control of your electronics projects with this compact and reliable 1-Channel Relay Module. Compatible with 3.3V, 5V, 12V, and 24V systems, this board is ideal for Arduino, Raspberry Pi, microcontrollers, and a wide range of DIY automation applications. Made in Mainland China.
Key Features
- Wide Voltage Compatibility: Supports 3.3V, 5V, 12V, and 24V input — works seamlessly with most popular microcontrollers and development boards.
- High & Low Level Trigger Selection: Each channel can be independently set for high or low level triggering via a simple jumper — maximum flexibility for any circuit design.
- Double Optocoupler Isolation: Provides strong drive capability, stable performance, and protects your control circuits. Trigger current: just 5mA.
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Maximum Load Capacity:
- Normally Open (NO) interface: AC 250V / 10A or DC 30V / 10A
- Fault-Tolerant Design: Even if the control line is disconnected, the relay remains in its current state — no unintended switching.
- Clear Status Indicators: Green LED for power-on status; Red LED for relay activation status — instant visual feedback at a glance.
- User-Friendly Terminal Connections: All interfaces connect directly via screw terminals — no soldering required for fast, secure wiring.
Module Interface Guide
- DC+ – Connect to positive pole of power supply
- DC– – Connect to negative pole of power supply
- IN – Signal input; controls relay via high or low level
Relay Output Terminals
- NO (Normally Open): Circuit is open at rest; closes when relay is energized.
- COM (Common): Common terminal shared by NO and NC contacts.
- NC (Normally Closed): Circuit is closed at rest; opens when relay is energized.
Trigger Level Selection
- S1 Jumper: Selects high or low level trigger for relay 1.
- Short COM to LOW → Low-level trigger mode
- Short COM to HIGH → High-level trigger mode
Specifications
| Channels | 1 |
| Input Voltage | 3.3V / 5V / 12V / 24V |
| Max Load (NO) | AC 250V/10A or DC 30V/10A |
| Trigger Current | 5mA |
| Isolation | Double Optocoupler |
| Indicators | Power (Green), Relay Status (Red) |
| Country of Origin | Made in Mainland China |
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Frequently Asked Questions
Q: What voltages does this relay module support?
A: This 1-channel relay module supports 3.3V, 5V, 12V, and 24V input voltages, making it compatible with a wide range of microcontrollers including Arduino, Raspberry Pi, and other development boards.
Q: Can I choose between high-level and low-level triggering?
A: Yes. The S1 jumper on the board lets you select either high-level or low-level triggering for the relay channel. Simply short COM to HIGH for high-level trigger mode, or to LOW for low-level trigger mode.
Q: What is the maximum load this relay can handle?
A: The normally open (NO) interface supports a maximum load of AC 250V/10A or DC 30V/10A — suitable for switching a wide variety of home automation and electronics loads.
Q: Is optocoupler isolation included for circuit protection?
A: Yes. This module uses double optocoupler isolation to protect your microcontroller or control circuit from the load side, ensuring stable and safe operation.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.