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(PPR) is designed for power control on active and active-inductive loads: heaters, light bulbs, commutator motors.


Technical Parameters



Rated voltage, V


Power control limit, % of rated


Max. load current, A


Max. operating package temperature, ºС

+ 85

Min. operating package temperature, ºС

- 45

Max. load power, W


Min. load power, W


Max. voltage amplitude between leads 1 and 2, V, not more


Voltage drop between leads 1 and 2 at rated current, V, not more


Leakage current in off-condition, mA


Operability at momentary load current, sec

              - at 15 A

              - at 70 A





External and Mounting Dimensions

Connection Diagram

1 and 2 – power leads
3 – control lead

a) for active load
b) for inductive motor load

Application & Operation Notes

It is recommended:

  1. to connect the load to the 2nd or 1st PPR lead.
  2. to use the heat sink compound КПТ-8 or its counterpart for lowering heat resistance while PPR mounting onto the radiator. Radiator option depends on heat-exchange conditions, load current and peak values of operating package temperature.
  3. It is possible to use the PPR without radiator when load current is not more than 2A.
  4. recommended resistance of the outer control resistor R1 = (700-1200) kOhm/ 0,25W.
  5. for min. power setting to use connection series of an additional resistor R2=150 kОhm/0,25 W and a trimmer R3=(100-300)kОhm/0,25 W which shall be connected parallel to the regulating resistor (see Connection Diagram).
  6. to connect RC-daisy chain parallel to the PPR leads 1-2 in order to maintain steady PPR operation with inductive load (cos φ<0,8). Bogey values of RC-daisy chain components are  100nF (400V) and 100 Ohm (2W). It is also recommended to connect parallel to the mentioned daisy chain a voltage suppressor (a voltage-variable resistor or limited diode) with protection voltage 380 – 420V.
  7. Owing to lead configuration to use the connection type Faston 2,8 x 0,5 or soldering for lead connecting.
  8. Lead soldering has to be done by soldering alloy  ПОС-61, soldering  temperature  shall  be 260±5 ºС, soldering duration shall not be longer than 6 sec. and the spacing between tin-plating point and package has (depending on lead length) to be not less than 3mm.
  9. The connection of the capacitance load to the PPR is not allowed.
  10. Lead bending is not acceptable.