1000 V, 30 A dual fast recovery diode in ISOTOP
The 100 ns reverse recovery time places this part in the fast-recovery class (under 500 ns per the classification), which matters when the diode is commutating off at tens of kilohertz in a hard-switched converter. At 30 A and 1000 V, the stored charge is low enough that the recovery snap is controlled — the designer still needs a snubber across the transformer leakage inductance, but the diode itself won't dominate the turn-off loss. The 2 V forward drop at 30 A is typical for a 1000 V silicon fast-recovery die at this current density.
ISOTOP package — thermal and mechanical reality
The ISOTOP (also branded ISOTOP® by ST) is a chassis-mount module with a screw-down metal tab that bolts directly to a heatsink or cold plate. The two independent diodes share the same baseplate, so the total dissipation is the sum of both junctions. The package suits high-reliability builds where a TO-247 or similar through-hole part would struggle with the lead-frame thermal resistance.
It is not in a last-time-buy or NRND window. The base product number STTH6110 covers the family, so a buyer searching for the TV1 suffix is looking at the ISOTOP variant specifically.