4PCS 12V 1 Channel Relay Module Board Optocoupler High Low Level Trigger 10A

4PCS DC 12V 1 Channel Relay Module Board with Optocoupler Isolation

Control electrical devices safely and efficiently with this 4-pack of DC 12V single-channel relay modules. Designed with optocoupler isolation, selectable high or low-level triggering, and convenient screw terminals, these relay boards are ideal for microcontroller projects, automation systems, robotics, and DIY electronics.

Reliable 12V Relay Control

Each relay module operates on DC 12V and supports switching loads up to AC 250V 10A or DC 30V 10A, making it suitable for controlling a variety of compatible electrical devices.

Optocoupler Isolation Protection

Built-in optocoupler isolation helps separate the control circuit from relay switching current. This design helps protect sensitive I/O ports while providing stable and reliable performance.

High or Low Level Trigger

Features a convenient jumper design that allows you to configure the relay for either high-level or low-level signal triggering, offering flexibility for different electronic control projects.

NC, COM & NO Screw Terminals

Each relay board includes easy-access screw terminals for:

• NC – Normally Closed
• COM – Common
• NO – Normally Open

Input terminals provide convenient connections for the coil and trigger signal.

Fault-Tolerant Design

Designed so that the relay remains inactive if the control line is disconnected, helping provide dependable operation in electronic control applications.

Wide Range of Applications

Compatible with many control platforms and DIY projects, including:

• ARM Systems
• PIC Controllers
• AVR Boards
• MCU Projects
• Raspberry Pi Projects
• CNC Machines
• Automation Systems
• Robotics
• Smart Home Projects
• Electronic Control Circuits

Product Specifications

• Type: 1 Channel Relay Module
• Operating Voltage: DC 12V
• Quantity: 4 Pieces
• Maximum AC Load: 250V AC / 10A
• Maximum DC Load: 30V DC / 10A
• Trigger Type: High Level or Low Level
• Isolation: Optocoupler
• Opto-Isolator Trigger Current: 5mA
• Relay Contacts: NC / COM / NO
• Connection Type: Screw Terminals
• Application: Electronics, Automation & DIY Projects