Type MTR30


~ 52 mm
MTR30 von E-T-A: Das mechanische Zeitrelais MTR30 ergänzt eine eventuell fehlende Anzugs- oder Abfallverzögerung.

As a replacement of a standard automotive relay, the MTR20 provides a possibly missing ON or OFF delay.

The MTR30 can be adjusted on site by means of a position switchon the unit with 10 positions. In addition, it can be adjusted by means of a potentiometer on the housing top with a small screw driver. Depending on the version ordered, the 10 positions of the position switch are assigned different functions and time windows. The exact time can be adjusted with a potentiometer.

  • Complexity and costs in inventory can be reduced, because several relays can be replaced by one flexibly adjustable device.
  • Reverse polarity protection and pre-set time settings provide time savings and failure reduction in production.
  • Easy replacement of standard relays in order to include ON or OFF delay – without changing the control unit software.

The MTR30 mechanical timer relays are available for DC 12 V and DC 24 V applications and are suitable for standard automotive relay sockets to ISO 7588 (ISO MINI).

Technical Data

Voltage rating DC 12 V
DC 24 V
Continuous current 10 A
30 A
Number of poles 2-pole
Temperature range -40° C … +85° C
Terminal design blade terminals for ISO 7588 MINI socket
Mounting method standard automotive relay socket
Design Cubic enclosure dimensions 30 mm x 30 mm x 40 mm
Feature - Versatile timer relay with mechanical contact system and electronic counter with 10 preset programmes
- Time window can be adjusted site
Contact system type mechanical


  • Automotive
  • Bus: Transit and School
  • Construction machinery
  • Heavy truck
  • Specialty vehicles

Scopes of applications

  • Control of pumps, valves, lighting or motors, which are meant to overtravel or stay open for a defined period of time
  • Co-ordinated, sequential switch-on of loads to avoid load peaks (e.g. with fans).


Datasheet & Explanations