4-pole MCCB with TM220 trip — 63 A frame, 76 kA SCCR
The Siemens SENTRON 3VM1163-3GE42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying a TM220 thermal-magnetic overcurrent release. The TM220 designation means the thermal element tracks the load current for overload protection, while the magnetic element reacts instantaneously to short-circuit currents — no electronic adjustment, just reliable bimetal and solenoid action. At 40 °C the continuous current rating is 63 A, and it holds that rating through 50 °C before the thermal derating curve begins to bite: 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. If your panel ambient runs hot, that derating table is the one that determines whether this frame is undersized for a 60 A continuous load. Breaking capacity climbs as the system voltage drops: 76 kA at 240 V AC, 53 kA at 415 V, 32 kA at 440 V, and 12 kA at 500 V. For a 480 V distribution panel, the 32 kA SCCR at 440 V is the nearest published point — expect the actual 480 V rating to sit between the 440 V and 500 V figures. The 4-pole construction (100% N-conductor protection) makes this breaker suitable for three-phase-plus-neutral systems where the neutral is fully rated, not just switched.
Mounting and panel fit
Footprint is 101.6 mm wide by 130 mm tall by 70 mm deep — a standard MCCB cutout that drops into most SENTRON or 3VA-series panelboards without re-drilling the mounting plate. IP40 on the front face means it's protected against tools and wires >1 mm, but not against water ingress; keep it inside a rated enclosure. Rated insulation voltage is 800 V, so it's comfortable on 480 V and 600 V class systems with headroom. Maximum power dissipation at full load is 17 W — negligible for thermal budgeting inside a ventilated panel, but worth noting if the breaker is packed tight with other heat sources.