Line protection MCCB for the panel schedule
The Siemens 3VA2225-5HL32-0DL0 is a SENTRON molded case circuit breaker rated for 250 A continuous current (Iu) across a 3-pole configuration, carrying an ETU320 electronic overcurrent release for line protection duty. Its interrupting capacity hits 187 kA at 240 V and 121 kA at 415/440 V, dropping to 79 kA at 500 V and 5.1 kA at 690 V — the SCCR headroom you need for high-fault panel coordination without cascading upstream. Thermal derating is published from 40 °C through 70 °C: the breaker holds 250 A up to 50 °C, then steps down to 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. That curve governs the actual ampacity in a crowded enclosure.
Auxiliary and release configuration
The breaker ships with an undervoltage release (UVR) and a 2+1+1 auxiliary contact block: two auxiliary switches, one trip alarm switch, and one electrical alarm switch (HQ type). That covers remote status and shunt-trip supervision without adding a separate accessory module. The basic switch is order code 3VA2225-5HL32-0AA0; the integrated auxiliary trip is 3VA9608-0BB25. Both are factory-fitted, not field-add — verify the nameplate matches the BOM before panel build.
Physical fit and environmental limits
Dimensions are 105 mm wide, 181 mm tall, and 86 mm deep — a standard 3-pole MCCB footprint for DIN-rail or panel-mount integration. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 50.5 W at rated current — factor that into enclosure thermal calculations if the panel is sealed or has limited convection.