Cart Go to basket
Item added to favorites Item removed from favorites

Heatsink O343 for disc diodes and thyristors


Pressure Differential [Pa]: 30
Heat resistance Air speed is 6 m/sec [°С/W]: 0,100
Heat resistance (Dissipation capacity) natural cooling [°С/W (W)]: 0,355 (220)
Overall dimensions without current lead (width/length/height) [mm]: 170x150x150
Screw hole diameter (Diameter of the contact surface) [mm]: (42)
Weight (without current lead) [кg]: 5,26 (4,46)

Send a request in 1 clickAsk a Question

  • Documents and certificates
  • Description


    Heatsinks O343 are designed for power diodes and thyristors in B2, B3, C1, C2, C3, C5, C6 disc housings.

    The dissipation power with natural cooling is 220 W. This type of cooling benefits from simple design, minimal noise, high reliability, low cost, easy operation and repairs. Alternatively, dissipation power may be increased with forced cooling in more intensive operation modes.

    The heatsink is made of aluminum reducing its weight to only 5.26 kg including current lead.

    The heatsink is installed using bolts and threaded holes in the heatsink baseplate. To ensure optimal heat dissipation values it is necessary to maintain even pressure through the entire surface of the heatsink with specified force.

    Compact size makes O343 a good choice for operation in limited space.

    Proton-Electrotex designs and manufactures own heatsinks for its semiconductors, allowing the company to offer efficient solutions for reliable heat removal.

    Proton-Electrotex is able to select suitable heatsink model for specific operation modes on customer’s request. It is also possible to order complete, ready-to-use power semiconductors in assembly with the heatsink.

    To buy the O343 heatsink, request the price or a technical advice please contact our sales department by phone +7 4862 440455 or email marketing@proton-electrotex.com.



    • is suitable for single- or dual-sided cooling of semiconductors;
    • industry standard dimensions 170x150x150 mm;
    • easy installation;
    • can be used in various environment conditions;
    • has a low pressure differential with forced cooling 30 Pa.
  • Applications

    These heatsinks are used for single- or dual-sided cooling of disc diodes and thyristors.

  • Additional Information

    Heatsink numbering guide:







    Air heatsink

    Design version


    Length, mm


    Ambient conditions



Address: 19 Leskova Str., Orel, 302040, Russia, room 27, off. 14

Send orderSend order
Ask a QuestionAsk a Question
Leave a reviewLeave a review