Engine Heater SafeStart 300 series

Heater w. T- or spreader rail

Heaters in the 300 series have flanges shaped as cups or as a disc.


The 300 series heaters consist of a cup or a disc-shaped flange. The heater is fastened to the engine block with a fixed or a spreader rail.

Engine pre-heaters are supplied separately because of specific necessary adaptations to each individual engine and vehicle type.

Normal usage – DEFA engine heaters are designed for “normal usage.” DEFA defines “normal usage” as; 3 connections for 3 hours pr. Twenty-four hours for 150 days (5 months) a year.

Professional use – For use emergency vehicles or other vehicles where the heater is in use continually, yearly controls are necessary. It might be required to install a replacement heater. DEFA AS will not cover the yearly service cost.

NOTE! Pulse power – Some parking facilities use interval (pulse) power timers that turning the power On and Off several times per hour. Using a DEFA engine heater in combination with these timers is NOT considered “Normal use” and claims will be declined.

Technical description

The heater is fastened to the engine block with a fixed or a spreader rail, which is fitted against the inside walls of the engine block, and a nut/sealing nut to secure the rail. This method is also used if there is not enough space around the heating element for a press t heater (000/100 series) and also for aluminum engines.

Up to 26-pack. Varies with the size of the heater.

DEFA AS conforms to the requirements of both ISO 9001- 2008, ISO 14001:2004 and OHSAS 18001:2007. In addition, our engine heaters and cables conform to the requirements of ISO/TS 16949:2002.

IP rating