Siemens 3VA2225-8HN42-0AA0 — 250 A SENTRON MCCB with ETU350 Trip Unit
The Siemens 3VA2225-8HN42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, with a 4-pole configuration and an ETU350 electronic trip unit. Its interrupting capacity reaches 440 kA at 240 V AC, 330 kA at 415 V, and 220 kA at 500 V — figures that place it in the high-fault-current tier for industrial distribution panels. This MCCB is designed for line protection (feeder duty) in main or branch distribution, where the 250 A frame and the ETU350's adjustable trip curves allow coordination with downstream breakers. The IP40 front protection suits panel-mount installations where the enclosure provides the environmental seal.
Thermal derating is minimal up to 50 °C (full 250 A), then drops to 241 A at 55 °C and 213 A at 70 °C.
Dimensions: 181 mm height, 140 mm width, 86 mm depth. The 4-pole width (140 mm) matches the standard SENTRON 3VA2 frame footprint for 250 A breakers. Panel cutout and mounting hole pattern are consistent across the 3VA2 family, so a swap with a sibling of the same frame size requires no re-drilling.