What the interrupting ratings mean for your panel
The Siemens 3VA2063-5HN36-0AB0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) with an ETU350 electronic trip unit, rated 63 A continuous at 40 °C and carrying a 187 kA interrupting capacity at 240 V — that is the headline number for most North American 480Y/277 V panels, where the line-to-neutral fault current is the limiting case. At 415 V and 440 V it still holds 121 kA, and at 500 V it delivers 79 kA, so it handles high-fault industrial services without cascading upstream. The 3.4 kA at 690 V is the tail-off point; if your system runs 690 V, this breaker is still rated but the interrupting margin tightens. The 63 A frame holds flat from 40 °C to 50 °C, then derates to 53.55 A at 70 °C — useful if the breaker lives in a hot enclosure next to drives.
Panel fit and integration
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint for DIN-rail or panel-mount enclosures. IP40 on the front means it is protected against solid objects over 1 mm but not sealed against moisture; keep it inside a cabinet, not in a washdown zone. The ETU350 electronic trip offers adjustable thermal and magnetic settings via the front dials, so you can coordinate with downstream breakers without swapping trip units. Two auxiliary switches (HP type) are built in for status feedback to a PLC or alarm panel.
What is not on this variant
This order code carries no undervoltage release, no shunt trip, no ground-fault monitoring, no phase-failure detection, and no communication module. If you need remote tripping or earth-leakage protection, this is not the variant — look at the 3VA2 with the appropriate release option. The 20 000-cycle latching endurance is typical for a distribution MCCB; it is not a high-cycle motor-switching breaker.