3VA2325-5JP32-0AA0 — SENTRON MCCB, 250 A, ETU550 Trip Unit
The Siemens 3VA2325-5JP32-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, with a 3-pole configuration and an ETU550 electronic trip unit for line protection duty. Breaking capacity reaches 187 kA at 240 V, 121 kA at 415 V, and 55 kA at 440 V — figures that govern fault-clearing capability across common industrial distribution voltages. At 690 V it still interrupts 7.5 kA. The ETU550 release allows adjustable time-current curves (tr min 0.5 s, tr max 25 s), giving the specifying engineer selectivity coordination headroom downstream. Rated insulation voltage Ui is 800 V, and the front face carries IP40 protection — suitable for enclosed panel mounting where splash ingress is not expected.
Integration — Panel Fit and Mounting
Dimensions: 248 mm height, 138 mm width, 110 mm depth. The 3-pole frame mounts via screw fixing to a backplate or mounting rail in a standard distribution panel. Maximum power loss is 37.5 W — factor this into enclosure thermal calculations, especially when grouping multiple breakers in a sealed cabinet. Operating temperature range: -25 °C to +70 °C; storage range: -40 °C to +80 °C. The 250 A rating holds flat across the full 40–70 °C band — no derating required up to the maximum operating temperature.