DC 12V 20A Digital Timer Relay Module | 0–999s/min/hr Dual Display

DC 12V Digital Time Relay Module — Dual Display, 20A, 0–999 Second / Minute / Hour

Take precise control of your electrical circuits with this compact DC 12V Digital Timer Relay Module. Featuring a bright 0.56-inch dual Nixie tube display, a robust 20A relay rating, and six versatile working modes, this module is ideal for makers, engineers, hobbyists, and industrial automation projects. Program delay-on, delay-off, timed on/off, and cyclic on/off sequences spanning from 0 to 999 seconds, minutes, or hours — all via a simple three-button interface.

Key Features

• Wide Timing Range: 0–999 seconds, 0–999 minutes, or 0–999 hours — choose the unit that fits your application.
• Six Working Modes: Delay-on, delay-off, single timed-on, single timed-off, cyclic on/off, and cyclic off/on for maximum flexibility.
• 20A Relay Capacity: Handles demanding loads across a variety of circuits and appliances.
• Dual 0.56" Nixie Tube Display: Clearly shows both T1 and T2 countdown values simultaneously.
• Non-Volatile Memory: Settings are automatically saved after 5–6 seconds — no battery backup required.
• Compact & Lightweight: Measures just 45.5 × 26.5 × 30 mm and weighs only 25 g — easy to integrate into enclosures or panels.
• Low Operating Voltage: Runs on DC 12V (bulk customization available for 5V/24V at 100+ units).

Specifications

How to Use

Setting Time (Short Press SET): The Nixie tube will blink to enter time-setting mode. Use the + and − buttons to adjust T1 and T2. Wait 5 seconds after your last adjustment — the module saves your settings automatically.

Setting Parameters (Long Press SET): Enters parameter mode. Two parameter groups are available:

• P0 — Selects timing unit: P0–0 = seconds (0–999s) | P0–1 = minutes (0–999min) | P0–2 = hours (0–999h)
• P1 — Selects working mode:
  • P1–0: Relay connects after T1 delay (one-shot delay-on)
  • P1–1: Relay disconnects after T1 delay (one-shot delay-off)
  • P1–2: Relay ON for T1, then OFF for T2 (single cycle, connect first)
  • P1–3: Relay OFF for T1, then ON for T2 (single cycle, disconnect first)
  • P1–4: Relay ON for T1, OFF for T2 — repeating cycle (connect-first loop)
  • P1–5: Relay OFF for T1, ON for T2 — repeating cycle (disconnect-first loop)

Example: To run a 10-second ON / 20-second OFF cycle: set T1 = 10, T2 = 20, P0–0 (seconds), P1–5 (cyclic, disconnect-first).

What's in the Box

• 1 × T2401 Digital Time Relay Module

Learn More About Electrical Safety

For best practices when working with relay modules and low-voltage circuits, refer to the OSHA Electrical Safety guidelines to ensure safe installation and operation.

Frequently Asked Questions

Q: What timing units does this DC 12V digital timer relay module support?

A: The module supports three timing units — seconds, minutes, and hours — each with a range of 0 to 999. You can select the unit using parameter P0 (P0–0 for seconds, P0–1 for minutes, P0–2 for hours), making it suitable for both very short and very long timing sequences.

Q: Will my settings be lost if the power is cut?

A: No. The module features non-volatile memory storage. After you finish adjusting settings, simply wait 5–6 seconds and the data is saved automatically — your timing parameters will be retained even after a power cycle.

Q: Can this relay module be used for cyclic (repeating) timer applications?

A: Yes. Modes P1–4 and P1–5 provide continuous cyclic operation. The relay will alternate between ON and OFF states using your programmed T1 and T2 intervals indefinitely, making it perfect for irrigation systems, ventilation control, LED lighting cycles, and other automated repeating tasks.

Q: What is the maximum load this 20A timer relay module can handle?

A: The onboard relay is rated for up to 20A, allowing it to switch substantial electrical loads. Always ensure your wiring and connected devices are rated to match or exceed this current capacity, and follow local electrical codes and safety standards during installation.