That flat thermal curve is the standout here: most MCCBs start shedding current above 40 °C, but this one holds 160 A all the way to 70 °C, which simplifies panel design in hot enclosures or near other heat sources.
Interrupting capacity and selectivity
At 500 V it still delivers 121 kA, dropping to 3.7 kA at 690 V. The high fault-current headroom at common distribution voltages (240–415 V) means this breaker can be used as a main or feeder in high-capacity panels where upstream fault current is substantial — no need to oversize to the next frame just for SCCR.
Undervoltage release and line protection
This is a line-protection design, not a motor-protection breaker; it's intended for cable and busbar protection in distribution panels.
No trip indicator on the front face, so you'll rely on the handle position or a remote auxiliary contact for status indication.
The basic switch assembly carries order code 3VA21166HL320AA0 — useful to know if you're sourcing the internal mechanism separately for a repair rather than replacing the whole breaker.