The Electrical IS heater – Heater with Electronic Relays
● Heating comfort for modern vehicle concepts
Modern, fuel-efficient vehicle engines provide too little waste heat to ensure a sufficient and comfortable temperature in the passenger compartment. With additional electrical air and water heaters (PTC heaters), Espar catem offers an effective solution to this challenge.

The PTC heater elements can be adapted without difficulty to customized applications and can also be used decentrally in the vehicle, for example for targeted neck-level heating. This know-how is already operational in more than 25 million vehicles around the globe.

With high-voltage applications up to 500 V, Espar catem is already developing mass-production-ready PTC heaters. They can be installed in very little space in future vehicle generations with hybrid, electric and fuel cell drives. These PTC heater elements cover an output range of up to 7 kW and can be adapted to the typical voltage ranges, providing highly efficient heating even in new vehicle concepts.

● IS heater – Heater with Electronic Relays
The IS (integrated switch) heater represents a cost-effective and commercial solution for electronic PTC heater elements. The electronic activation is restricted to the switching of individual heating circuits via electronic power switches integrated into heating element.
Compared to actuation with mechanical relays, electronic relays stand out thanks to their silent switching of the heating circuits and a considerably longer service life.