In a UL 1077 supplementary protection context, the same breaker is rated 5 kA, so if your panel requires a UL-listed branch-circuit device, this part serves as supplementary protection only, not a main feeder breaker. The 2-pole construction switches both phase conductors; neutral is not switched, which is the standard arrangement for single-phase or two-phase loads where the neutral is bonded elsewhere. That's high enough for most industrial distribution boards fed by a transformer of several hundred kVA. The DC rating of 15 kA at 60 V (max 72 V) covers battery banks, UPS outputs, and DC bus applications — but note the voltage ceiling: 60 V rated, 72 V maximum operating, so it fits 48 V nominal systems with float voltage up to 60 V, not 110 V DC traction batteries.
Ambient range from -40 °C to 75 °C, with derating for humidity: max 95% RH at 55 °C, dropping to 35% at 75 °C. That covers outdoor cabinets in cold climates and warm indoor switchgear rooms.