Solutions for your safety

Type: ESR20


The ESR20 standard solid state relay can replace standard automotive relays in all applications where loads must be switched, for example the controllers of pumps, valves, lighting or fans. The great variety of product versions covers positive and negative control levels and also high side switch and low side switch.

The ESR20 solid state relay features high continuous current and switching frequency as well as long endurance and noiseless switching operation. In addition it is extremely resistant against environmental influences.

  • It ensures full usability over the vehicle’s entire life span due to wear-free switching operations. Costly complaints or service works are eliminated.
  • Noiseless switching operations ensure unrivalled driver convenience.
  • The ESR20 offers flexible use due to an enormous resistance against environmental conditions such as dust, humidity and vibration.

The ESR20 standard solid state relay is available for DC 12 V and DC 24 V applications and is suitable for standard automotive relay sockets to ISO 7588.

Technical Data

Voltage rating of load DC 12 V/ DC 24 V
Continuous current 4 A
Physical isolation of load circuit 1 (NO)
Temperature range -40 °C … +85 °C
Terminal design ISO 7588 MINI Sockel
Mounting method standard automotive relay socket
Design Cubic enclosure 30 mm x 30 mm x 30 mm
Feature Cubic relay available as high or low side switch
Contact system type electronic



  • Buses
  • Construction machinery
  • Passenger cars
  • agricultural and forestry machinery
  • boats
  • emergency cars
  • trucks

Scopes of applications

  • Monitoring of all switching operations of loads such as pumps, valves, lighting and fans.
  • Positive and negative control levels as well as high side switch and low side switch.


Data sheet 154.1 KB