SENTRON 3VA2 MCCB — 40 A, ETU550, Line Protection
The Siemens 3VA2140-8JP32-0AA0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) in the line protection version, carrying a rated continuous current Iu of 40 A across the full operating temperature range from -40 °C to 70 °C — no derating needed up to 70 °C ambient. Three poles, fitted with the ETU550 electronic trip unit. The ETU550 is a microprocessor-based overcurrent release with adjustable time-current curves — tr adjustable from 0.5 s to 25 s, tsd up to 0.5 s — giving you selective coordination flexibility downstream of a transformer or upstream of distribution panels. Breaking capacity is voltage-dependent: 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 53 kA at 690 V. That puts it in the high-interrupting category for this frame size — suitable for fault currents near the transformer secondary in industrial switchgear.
The 3VA2 frame uses a screw-fixed mounting pattern — not DIN rail — so plan for a drilled backplate or mounting plate in the enclosure.