I usually use one of the HS series by Arcol (formerly several different names). They had a 25x rating for peak power; I don't see it mentioned in the latest "datasheet". Usually a HS100 (nominally 100 W) will come in under that limit. These are aluminium clad, bolt down types. They don't need a heatsink, because of the short duration of the power pulse.
A pre-charge resistor that explodes is not fun, and stinks for a week. Plus, there could be danger with wire ejected. So I would not exceed the rating.
On the old datasheets, there were graphs of peak energy(?) that I admit I don't understand. It may be that that's how Tesla get away with appearing to exceed the ratings.
A pre-charge resistor that explodes is not fun, and stinks for a week. Plus, there could be danger with wire ejected. So I would not exceed the rating.
On the old datasheets, there were graphs of peak energy(?) that I admit I don't understand. It may be that that's how Tesla get away with appearing to exceed the ratings.