Power Assemblies and Controllers

Circuit Protection

Semikron Heatsinks

Semikron offers a broad range of heatsinks, including: forced and natural air cooling and coolers. Semikron’s heat sinks are available for capsules, insulated base modules and IPMs.

Please click the product types below to view the Semikron datasheets.

Product Type       



Rthsa in K/W natural    


Rthsa in K/W forced/water    

Suitable for  


Weight (Kg)

Product Status  


P1 Forced-air cooled   0.7 0.4 Studs or Modules 0.8 In production
P3 Forced-air cooled 0.45 0.14 Isolated Base Modules 0.7 In production
P11 Forced-air cooled 0.2 0.05 Capsules 3.8 In production
P16 Forced-air cooled - 0.06 SKiiP or Modules 1.3 In production
P17 Forced-air cooled 0.45 0.12 Capsules 1.5 In production
R 4A Forced-air cooled 1.4 0.38 Isolated Base Modules   0.6 In production
U 3 Forced-air cooled 0.14 0.06 Capsules 7.1 In production


SEMIKRON Heatsink P1 SEMIKRON Heatsink P3SEMIKRON Heatsink P11

SEMIKRON Heatsink P16SEMIKRON Heatsink P17SEMIKRON Heatsink R 4ASEMIKRON Heatsink U 3


View GD Rectifiers' complete Heatsink range here.

For further information on Semikron Heatsinks please call: 01444 243 452 or email: .(JavaScript must be enabled to view this email address)

Semikron Ltd

SEMIKRON is a leading global semiconductor manufacturer. Semikron focuses on new markets such as renewable energy and hybrid vehicles as well as industrial applications such as electric drives, welding machines, lifts, power supplies, pumps, conveyor belts, trains and trams.

Further information:

You can find further information on Semikron Ltd using the following links:

Tel: 01444 243 452

Fax: 01444 870 722

Email: enquiries@gdrectifiers.co.uk