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Bolec TM301 Timer 12/24VDC


TM301: Versatile 12/24V timer module with normally open and normally closed volt-free contact output for a variety of applications, including preheat (glow-plug) circuits in diesel engines, alarm before shutdown timers, cool down time for turbochargers, fixed time on for reversing alarms, and warm up and cool down timers on automatic start systems.

Specsheet: Download PDF
Instruction Manual: Download PDF

Introducing the TM301 Timer Module: The Ultimate Timing Solution for Your Automotive Needs

The TM301 timer module is the perfect solution for a variety of automotive applications, from preheating diesel engines to controlling reversing alarms. With its four selectable timing ranges, plug-and-play installation, and robust performance, the TM301 is the most versatile and user-friendly timer module on the market.

Key Features:

  • Four selectable timing ranges: 1-30 seconds, 2-60 seconds, 1-30 minutes, and 2-60 minutes
  • Plug-and-play installation: Simply connect the TM301 to your circuit and you’re good to go
  • Robust performance: Can handle up to 10 Amps of current load
  • User-friendly: Easy to set up and use
  • Backed by a one-year warranty


  • Preheat diesel engines
  • Control reversing alarms
  • Set alarm timers
  • Control turbocharger cool down
  • Optimize warm-up and cool-down timing for automatic start systems
  • And more!

Order your TM301 timer module today and experience the precision, power, and performance that sets it apart.

Additional Information

1. Dimensions: 58 x 42 x 29mm overall.
2. Voltage: 12 VDC / 24 VDC selected via DIP Switch.
3. Time Range: 1-30, 2-60 seconds; 1-30, 2-60 minutes selectable via DIP Switch.
4. Contact Rating: 12VDC 3amp, 24VDC 1.5amp resistive.


Ratio Switch Settings

Specsheet: Download PDF
Instruction Manual: Download PDF

Bolec Electronics

Founded in 1978, Bolec Electronics has developed a portfolio of over 80 products and a reputation that survive and thrive in some of Australia's harshest environments. Bolec Electronics is the OE supplier to some of the world's largest truck and engine manufactures.

Premium quality

Easy to install


Designed and made in Australia