TRT3 48v


  • Delay on operate and on release
  • Timer relay module with 1 changeover, width 23 mm
  • The input-side transformer offers the following advantages: 1. High interference voltage protection 2. Galvanic separation
  • Supply: 48V AC with control LED for energised relay
  • 2 functions: Delay on operate and on release
  • Description
  • Ordering information
  • Input data
  • Output data
  • General data

    • The TRT3 is a delay on operate and on release timer relay with built-in transformer for harsh networks.
    • The functions are selectable via an outer bridge.
    • The time range is 0.2-3 seconds.


    • The 48V supply voltage is connected to terminals A and B.
    • The changeover is located at terminals:
      – F common
      – E normally open contact and
      – G normally closed contact
    • Delay on operate: The device is connected to the delay on operate timer relay by a bridge at C and D. When the set time elapses, the contact closes between F and E after application of the supply voltage.
    • Delay on release: If terminals H and D are jumpered and opened again, the output relay is energised and releases again when the set time elapses.
    Case colour: orange  
    Type TRT3
    Order number 905117
    Supply voltage 48 V ± 10%, 50-60 Hz
    Power consumption 0,35VA
    Function indication LED
    Contact arrangement 1 changeover
    Max switching voltage 250V AC
    Continuous current 5A
    Inrush current 8A
    Switching power AC max. 1200 VA (ohmic load)
    Switching power DC max. 120 W (ohmic load)
    Coil/contact isolation voltage 4 kV ms.
    Time range 0,2 – 3 s
    Service temperature 0°C to +40°C
    Storage temperature  – 20°C to +80°C
    Degree of protection IP 20
    Screwed connection AWG 12
    Dimensions 60 x 58 x 23 mm


    Monitoring / Supply