The Siemens SENTRON 3VA2440-5MQ32-0AC0 is a 3-pole molded case circuit breaker on the IEC frame 630 platform, rated In=400A with a breaking capacity class M delivering Icu=55kA at 415 V AC. The ETU860M electronic trip unit provides LSIG protection — overload (L), short-time (S), instantaneous (I), and ground-fault (G) — with adjustable settings: Ir from 160 A to 400 A, Isd from 1.2 to 15 x In, Ii from 3 to 15 x In, and Ig from 0.2 to 1 x In with a ground-fault time delay tg of 0.05 to 0.8 s. This makes it a motor-protection MCCB, not a line-protection generalist — the LSIG curve and the ETU860M's communication-ready design target motor feeder circuits where selectivity and ground-fault coordination matter.
Sourcing & lifecycle
The lifecycle stage is listed as current, meaning Siemens still manufactures this order code as an active catalog line. No successor or phase-out notice is recorded. For BOM-line commitment, the part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.
What the ratings mean for fit
The 55 kA Icu at 415 V AC places this in breaking capacity class M — it can interrupt fault currents up to that level without upstream fusing, which is the typical requirement for industrial motor control centers (MCCs) and sub-distribution boards on 400 V networks. The ETU860M is the top-tier trip unit in the 3VA2 family; it supports communication (PROFIBUS, PROFINET, Modbus TCP via optional modules) and offers a wider adjustment range than the ETU330 or ETU560 found on line-protection siblings. The LSIG protection set means this breaker handles both phase and ground faults, so it can serve as the main feeder breaker in a panel supplying multiple motor starters where ground-fault coordination is required by code.
Panel integration
The 3VA2 frame 630 mounts with nut keeper kits on both sides for the main current circuit — front-terminal connection, not rear or plug-in. The description notes a nut keeper kit is included. Two auxiliary switch changeover contacts are integrated. The IP40 front protection is standard for panel-mounted breakers; the enclosure itself provides the overall IP rating.