SENTRON 3VA2225-5KP32-0DA0 — 250 A Line Protection MCCB
The Siemens SENTRON 3VA2225-5KP32-0DA0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C, designed for line protection in distribution panels. Its interrupting capacity reaches 187 kA at 240 V and 121 kA at both 415 V and 440 V — enough headroom for high-fault utility feeds or transformer secondaries where SCCR coordination matters. An integral undervoltage release (UVR) trips the breaker when supply drops below the dropout threshold, and the communication function enables remote monitoring or integration with a BMS. The 86 mm depth and 105 mm width fit standard MCCB mounting footprints in switchboards or enclosed panelboards.
Thermal Derating and SCCR by Voltage
The 250 A continuous rating holds from 40 °C through 50 °C ambient, then derates linearly to 200 A at 70 °C — a curve you need when the breaker sits in a congested enclosure or near other heat sources. Short-circuit capacity drops with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V. At 690 V the 4.5 kA figure limits this breaker to low-fault installations or where upstream current-limiting devices reduce let-through.
Integration and Mounting
The 3VA2225-5KP32-0DA0 occupies a 105 mm wide by 181 mm tall footprint with 86 mm depth — standard for SENTRON 3VA frame sizes. The 3-pole design connects to busbars or cable lugs in switchboard or panelboard sections. The undervoltage release and communication function require auxiliary wiring; the UVR coil must be supplied from the load side or a separate control voltage to avoid nuisance trips on upstream switching.