Constructing a High-Current Zth-Test Bench with Low-Voltage MOSFETs for Power Semiconductor Modules

Abstract:
This paper describes a self-made 2000 A low-voltage MOSFET for power-cycling and Zth test bench. The development of the auxiliary switches is based on surface-mountable MOSFETs in a two-step soldering process, using lead-free solder alloys (SAC, SnBi). The aim was to realise a reduction in the electrical power of the Zth test bench. In the end, the losses could be reduced by around 70 % through the developed the auxiliary switches alone. Also shown is a Zth measurement of the self-made 2000 A low-voltage MOSFET and the entire structure of the High-Current Zth-Test Bench.