DC 12V NE555 Delay Relay Timer Switch – Monostable Delay Module for Automotive & More

Take precise control of your electrical timing with this DC 12V NE555 Delay Relay Timer Switch. Built around the trusted NE555 timer chip, this compact monostable module lets you set an adjustable delay from 0 to 10 seconds before your relay engages — protecting your car electronics, sequential-start setups, and more from damaging inrush current.

Made in Mainland China.

Why You'll Love This Delay Timer Module

Premium NE555 Chip: Industry-standard, highly reliable timer IC delivers stable and repeatable delay performance every time.
Adjustable Delay (0–10 Seconds): On-board potentiometer lets you fine-tune the delay right out of the box — no soldering required for basic use.
Extendable Delay Time: Need longer delays? Simply add a larger capacitor (C1) or an external potentiometer to extend beyond 10 seconds. Delay formula: T = 1.1 × R × C
Dual Status Indicators: Dedicated LED indicators for input power and relay pull-in status — always know what state your module is in at a glance.
High-Power Relay Output: Controls AC 220V / 10A loads (up to 2,000W) — ideal for switching larger devices safely.
Relay Renewal Protection: Built-in protection circuitry shields the relay from voltage spikes and wear.
Compact Form Factor: Measures just 65 × 21 × 12 mm — fits neatly in automotive panels, project enclosures, and control boxes.

Specifications

Main Chip	NE555
Operating Voltage	DC 12V
Delay Range	0 – 10 seconds (adjustable)
Relay Output	AC 220V / 10A (max 2,000W)
Module Type	Monostable
Product Dimensions	65 × 21 × 12 mm
Country of Origin	Mainland China
Package Includes	1 × NE555 Time Delay Relay Module

Ideal Use Cases

🚗 Automotive Electronics: Delay power to sensitive car components during ignition to prevent burnout from high startup current.
⚡ Sequential Start Systems: Stagger the startup of multiple devices to avoid overloading circuits when switching on simultaneously.
🏠 Home Automation & DIY Projects: Integrate into relay control circuits, alarm systems, lighting timers, and more.
🔧 Industrial Control: Add a reliable time-delay function to any 12V control circuit without complex programming.

How It Works

When 12V power is supplied to the module, the relay remains open (normally open contacts disconnected, normally closed contacts connected). After the programmed delay period (1–10 seconds, adjustable), the relay energizes and latches in that state until power is removed. This monostable behavior makes it perfect for protecting downstream devices from startup transients.

Related Products You May Like

10-Pack 22AWG Glass Tube Fuse Holder 5x20mm & 6x30mm Screw – Protect your circuits with reliable inline fuse holders.
100W Dual-Port Car Charger for Starlink Mini – Fast Charging – Keep your automotive electronics powered on the go.

Technical Reference

For more information on electrical safety standards and circuit protection best practices, visit the U.S. Consumer Product Safety Commission (CPSC).

Note: Due to monitor calibration differences, actual product color may vary slightly from images. Please allow ±1–2 cm tolerance due to manual measurement.

Frequently Asked Questions

Q: What is the adjustable delay range of this NE555 relay timer module?

A: The delay range is adjustable from 0 to approximately 10 seconds using the on-board potentiometer. You can extend this range by adding a larger capacitor (C1) or an external potentiometer. The delay time follows the formula: T = 1.1 × R × C. For example, with a 100µF capacitor and 100KΩ resistor, T ≈ 11 seconds.

Q: Can this delay relay module be used for automotive applications?

A: Yes — it is specifically designed with automotive use in mind. When your vehicle starts, ignition draws a large surge of current that can damage sensitive electronics. This module delays power delivery to your devices by up to 10 seconds after the 12V supply is connected, protecting your car electronics from inrush current damage.

Q: What load can the relay output switch?

A: The relay is rated for AC 220V at up to 10A, which means it can safely control loads up to 2,000W (2kW). It is suitable for a wide range of devices including lighting, fans, motors, and other automotive or household electrical equipment.

Q: Is any programming or soldering required to use this module?

A: No programming is required. Simply connect your DC 12V power supply and adjust the on-board potentiometer with a small screwdriver to set your desired delay time. The module is ready to use out of the box for standard 0–10 second delays.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.

We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.