SENTRON 3VA2040-4JQ42-0AA0 — 40 A 4-pole MCCB with ETU560 electronic trip unit
The Siemens SENTRON 3VA2040-4JQ42-0AA0 is a 4-pole molded case circuit breaker rated for 40 A continuous current across the full operating temperature range from -40 °C to 70 °C, with no derating needed at elevated panel temperatures. It carries the ETU560 electronic trip unit, which supports adjustable long-time pickup and delay settings (tr from 0.5 s to 25 s), plus configurable N-conductor protection (OFF, 40 %, or 160 % of phase rating) — making it suited for line-feeder duty where coordination with downstream breakers matters. The interrupting ratings are 121 kA at 240 V, 76 kA at 415 V and 440 V, 53 kA at 500 V, and 3 kA at 690 V — the 415 V figure covers the common 400 V class panel bus, giving solid SCCR headroom for transformer-fed distribution. Communication function is onboard (the ETU560 supports the SENTRON communication-capable platform), and ground fault monitoring uses summation current sensing on L+N conductors.
Sourcing and lifecycle — active, with a direct peer for panel swaps
The 3VA2040-4JQ42-0AA0 shares the same 4-pole SENTRON 3VA frame dimensions (86 mm deep, 140 mm wide, 181 mm high) and ETU560 trip platform as the 3VA2140-8JQ42-0AA0.
The envelope is 86 mm deep by 140 mm wide by 181 mm high (3.4 in × 5.5 in × 7.1 in), fitting standard SENTRON 3VA panel cutouts for 4-pole frames. Maximum power loss is 2.2 W, so internal panel heating from this breaker is negligible even in dense layouts.