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Fast recovery diodes

Diodes can be subdivided into two main classes: Rectifier diodes (standard recovery) and fast diodes. Rectifier diodes are generally used for conversion of AC (alternating current) to DC (direct current). While optimized for low conduction losses, Rectifier diodes withstand only moderate dynamic stress in transition from conducting to the blocking state.

Fast diodes, on the other hand, are companion devices to switches in DC to AC conversion. Every switch (GTO, IGCT or IGBT) requires a complementary diode (e.g. for "free-wheeling" reactive power) in order to enable operation of the DC-AC conversion system with inductive loads.

Fast diodes are optimized to accept high dynamic stress (fast transition from conducting to blocking state). However, they generally have higher conduction losses than rectifier diodes. For every switch family (GTO, IGCT and IGBT), we offer fast diodes that are optimized for the switch application.

For downloading and printing of data sheets in pdf format, click on the part numbers. 

Part number VRRM (V) IFAVM (A) IFSM (kA) Qrr (µC)  VDC (V) Package* (mm)
5SDF 13H4501 4500 1200 25.0  - 2800 94/63
5SDF 10H6004 6000 1100 18.0  - 3800 94/63

*Note: maximum diameter / pole-piece diameter

Part number VRRM (V)  IFAVM (A) IFSM (kA)  Qrr(µC)  Package* (mm)
5SDF 20L4521  4500  1950  38  5300 120/85
5SDF 28L4521  4500  2620  48  10100 120/85


*Note: maximum diameter / pole-piece diameter

Part number VRRM (V) IFAVM (A) IFSM (kA) VDC (V) Package* (mm) Plecs model 
5SDF 03D4502 4500 275 5.0 2800 60/34  
5SDF 05F4502 4500 435 16.0 2800 75/47  
5SDF 10H4503 4500 1100 20.0 2800 94/63  
5SDF 20L4520 4500 1950 38 2800 120/85  XML
5SDF 28L4520 4500 2620 48 2800 120/85  XML
5SDF 02D6004 5500 175 3.0 3300 60/34  
5SDF 04F6004 5500 380 10.0 3300 75/47  
5SDF 08H6005 5500 585 18.0 3300 94/63  


*Note: maximum diameter / pole-piece diameter

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