• 1 NOC, 1 NCC or 1 change-over contact for max. 25 A
  • Drive by one or two coils
  • Defined switching position in the event of power outage
  • With manual override and position display
  • Ambient temperatures -25 to +70 °C
  • Customer-specific contacts
Have questions or need an offer?

We will be pleased to help you.

  • Hengstler GmbH
    Uhlandstr. 49
    78554 Aldingen
  • Tel. +49 / 7424 - 89 -468
  • Support request


Function / ApplicationBistable relay
Product lineKACO
Relay familyRPH
Ambient temperature [°C]-25 ... +70 °C
Soldering heat resistance [°C]260 °C
Max. soldering time [s]5 s
StandardsIEC 61810-1
Meets the requirementsRoHS


Number of NO contacts0 ... 1
Number of NC contacts0 ... 1
Number of CO contacts0 ...1
Dimensions L x W x H [mm]55,5 x 15,0 x 29,5 mm
Housingdustproof (RT II)
Shock resistance [g]100 g
Puls duration (half sinus)11 ms
Vibration resistance [g]20 g
Frequency range [Hz]10 - 55 Hz
Operating time [ms] 10 ms
Releasing time [ms] 10 ms
Mechanical service life (without load)1,000,000 switching cycles
Connection typeCoil: Solder pins for pcb
Fixing typeContact: Current bar (for pull bow fixing)


Drive system DC bistable
Nominal coil voltage [V]DC bistable
Nominal coil current [A]5 ... 48 V
Resistance tolerance [%]16 ... 3,500 Ohm
Max. switching current [A]AgCdO
Max. switching capacity [VA]230/240 V
Max. switching capacity [W]6615 VA
Short-circuit capacity 1000 A / AC 230 V [A]30,000 cycles


Over voltage categoryReinforced insualtion
Only a short switching pulse is required to make the K-RPH bistable relay from HENGSTLER reliably switch over. This means that, even in the event of a power outage, the relay is always in a clearly defined, safe switching position. The special H-armature construction means that extremely high shock and vibration resistance can be achieved. A manual switch is available in a number of colours to suit customer preference to enable the switching state to be manually operated. K-RPH bistable relays conform with standard IEC EN 61810-1.