Dual 120 A fast recovery diode in ISOTOP
The STTH20002TV1 from STMicroelectronics is a dual fast recovery diode in the ISOTOP chassis-mount package. This combination suits high-frequency rectification in welding machines, UPS systems, and motor drive DC-link snubbers where switching losses dominate the thermal budget.
A 50 ns reverse recovery time at 120 A means the diode can switch at frequencies above 50 kHz without the recovery tail eating into the efficiency. In a 100 A boost stage, the 1.05 V forward drop at 100 A sets the conduction loss floor; the 50 ns trr keeps the switching loss term low enough that a single ISOTOP module can handle the full bridge without parallel diodes.
Mounting and thermal path
The ISOTOP package is bolted directly to a heatsink through the baseplate — no insulator pad needed if the heatsink is at the same potential as the cathode. The two diodes share the common cathode tab, so the heatsink is at cathode potential. Screw terminals carry the anode and cathode connections; the M4 or M5 studs handle the full 120 A per diode without additional busbars for the package itself.