What this MCCB carries
The Siemens SENTRON 3VA2225-7HN32-0AF0 is a 3-pole molded case circuit breaker rated for 250 A continuous current at 40 °C ambient, with a maximum interrupting capacity of 330 kA at 240 VAC. It is designed for line protection and includes a 1 auxiliary switch plus 1 trip alarm switch (HQ configuration) for remote status indication. The breaker measures 181 mm high, 105 mm wide, and 86 mm deep, fitting standard MCCB panel cutouts and busbar layouts.
Interrupting capacity across voltages
This breaker delivers 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 4.5 kA at 690 V — covering most low-voltage distribution scenarios where high fault currents are expected. The 250 A frame is thermally rated through 70 °C ambient; at 55 °C it still holds 241 A, and at 70 °C it derates to 213 A, so the 250 A rating is solid for normal panel environments up to 50 °C.
Panel fit and integration
Mounts in standard MCCB panel cutouts; the 105 mm width and 86 mm depth leave room for adjacent breakers and busbar connections without re-spacing. The integrated auxiliary and trip alarm switches (HQ) provide dry contacts for PLC or SCADA monitoring, eliminating the need for a separate add-on module in most control panels.