Buy 5v 4 Channel Relay with Optocoupler Online in India

Package Includes:

• 1 x 4 channel 5v Relay

Specifications

1. What is a 4 channel relay module?

• The 4 Channel Relay Module is a convenient board that can control high voltage and high current loads such as motor, solenoid valves, lamps, and AC load. It is designed to interface with microcontrollers such as Arduino, PIC, etc.

2. How does 4 channel relay work?

• The 4 channel Relays are the switches that open and close circuits electronically. Relays control one electrical circuit by opening and closing contacts in another circuit. When a relay contact is normally open (NO), there is an open contact when the relay is not energized. When a relay contact is Normally Closed (NC), there is a closed contact when the relay is not energized. In either case, applying electrical current to the contacts will change their state

3. What are the components present on a four-channel relay module?

• The major components present on the 4-channel 5V relay board are terminal blocks, male headers, transistors, optocouplers, diodes, and LEDs.

4. How do you connect 4 Channel relay modules to Arduino?

• NC: Normally closed 120-240V terminal
• NO: Normally open 120-240V terminal
• C: Common terminal
• Ground: Connects to the ground pin on the Arduino 5V
• Vcc: Connects the Arduino’s 5V pin
• Signal: Carries the trigger signal from the Arduino that activates the relay

5. What are Normal Open and Normal Closed in a 4-channel 5V relay board?

• The 4 channel relay module has two different types of electrical contacts inside normally open (NO) and normally closed (NC). The one you use will depend on whether you want the 5V signal to turn the switch on or turn the switch off. The 120-240V supply current enters the relay at the common (C) terminal in both configurations. To use the normally open contacts, use the NO terminal. To use the normally closed contacts, use the NC terminal.

Shipping Policy

• All orders confirmed before 3:00 PM IST are shipped the same day, barring rare pickup delays on holidays or disturbances.
• Delivery time in Metro cities is 1–3 days; for other locations, it is 3–7 days. Delivery varies based on location and courier service.

Return & Refund Policy

• Return window: 7 days from receipt unless stated otherwise.
• No refunds or replacements after the return window.
• Returns are accepted only for non-working or damaged products.
• Initiate return requests via a Support ticket or contact us at +91-8123057137.
• Refunds are processed within 3–4 working days after inspection and approval.