SENTRON 3VA2225-5KP32-0DA0 — 250 A Line Protection MCCB
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.
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.
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.