What this MCCB delivers — and what the ratings actually mean for your panel
The Siemens 3VA2463-8HM42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 630 A continuous current across four poles — that's the full-frame rating, not a derated value, so it handles the full load of a large feeder or a main disconnect without needing to oversize the frame. Its interrupting capacity hits 440 kA at 240 V AC and still holds 330 kA at 415 V and 440 V — numbers that put it in the high-fault-current class, meaning it can be installed downstream of a transformer or in a plant with stiff utility supply without worrying about cascading failure upstream. The breaker is designed for line protection (cable/feeder protection, not motor or generator), and it carries a rated insulation voltage of 800 V, which gives headroom for 690 V systems common in heavy industrial installations. Thermal derating is published across the full ambient range: 630 A at 40 °C, dropping to 520 A at 70 °C — so if your panel runs hot (say, 55 °C inside the enclosure), the breaker still carries 575 A without nuisance tripping.
Sourcing and lifecycle — what to expect when you order
The lifecycle stage is listed as current — this is an active, in-production catalog item from Siemens, not a phase-out or NRND part. No official successor has been announced — this is the current generation of the 3VA2 platform.
Dimensions and panel fit — what the 110 mm depth means for your enclosure
The breaker measures 184 mm wide, 248 mm tall, and 110 mm deep — the depth is the critical dimension for shallow enclosures or when mounting on a DIN rail with limited rear clearance. At 110 mm deep, it fits enclosures with room for wiring and bus bars behind the breaker.
Compliance and documentation — what you get with the part
As a Siemens SENTRON MCCB, this breaker carries the usual suite of industrial certifications: IEC/EN 60947-2, UL 489, and CSA C22.2 No. 5 — the specific approvals are listed on the nameplate and in the manufacturer's declaration of conformity. RoHS and REACH compliance documentation is available from Siemens for this product family; the declaration covers the 3VA2 series as a whole.