DC 12V LED Digital Delay Timer Relay Module – A02F-3X

DC 12V LED Display Digital Delay Timer Control Switch Relay Module

The A02F-3X DC 12V Digital Delay Timer Relay Module is a compact, reliable automation control solution designed for a wide range of 12V DC applications. Featuring a bright LED display and straightforward parameter programming, this module lets you precisely control the on/off timing of devices — perfect for automotive systems, industrial automation, home projects, and DIY electronics builds.

Key Features

• LED Digital Display: Clear, easy-to-read readout for quick timer parameter monitoring at a glance.
• Automation Relay Module: Functions as a programmable delay timer, control switch relay, and relay module all in one compact unit.
• Anti-Reverse Protection: Built-in supply anti-reverse function protects the circuit from accidental reverse polarity connections.
• Persistent Memory: Parameters are retained after power-off, so your settings are preserved even through power interruptions.
• PCB Construction: Built on a quality printed circuit board for stable, long-lasting performance in daily use.
• Compact Form Factor: Dimensions of 64.2mm × 34.8mm × 18.5mm make it easy to integrate into tight enclosures and custom builds.
• Operating Voltage: DC 12V input for broad compatibility with automotive and electronics systems.

Specifications

• Model: A02F-3X
• Type: Automation Relay / LED Digital Relay / Delay Timer / Control Switch Relay / Relay Module
• Input Voltage: DC 12V
• Dimensions: 64.2mm × 34.8mm × 18.5mm
• Material: Printed Circuit Board (PCB)
• Semi-finished Product: No

What's in the Box?

• 1 × A02F-3X DC 12V LED Digital Delay Timer Control Switch Relay Module

Ideal Applications

• Automotive electrical systems and accessories
• Home automation and DIY electronics projects
• Industrial control panels and timing circuits
• Pump, fan, and motor delay control setups

For general guidance on electrical safety when working with relay modules and control circuits, refer to the OSHA Electrical Safety guidelines.

Frequently Asked Questions

Q: What does the A02F-3X DC 12V LED Digital Delay Timer Relay Module do?

A: The A02F-3X is a programmable digital delay timer relay module that allows you to set precise time delays for switching 12V DC circuits on or off. It features an LED display for easy parameter monitoring, a built-in anti-reverse protection function, and persistent memory that retains your settings after power is removed — making it ideal for automation, automotive, and DIY electronics applications.

Q: What voltage does this relay module require?

A: This module operates on DC 12V input, making it compatible with most automotive electrical systems, 12V power supplies, and a wide variety of electronics projects.

Q: How are the timer parameters set and stored?

A: Timer parameters are configured directly via the module's controls and shown on the LED digital display. Once set, the parameters are stored in non-volatile memory, meaning they are retained even after the power is disconnected, so you don't need to reprogram the module each time it is powered on.

Q: What is the physical size of the A02F-3X module?

A: The module measures 64.2mm × 34.8mm × 18.5mm, making it compact enough to fit into custom enclosures, control boxes, and space-constrained installations.