What this MCCB carries — and what it means for your panel
The Siemens SENTRON 3VA2225-5HL32-0KH0 is a 3-pole molded case circuit breaker (MCCB) rated at 250 A continuous current at 40 °C, with the ETU320 electronic trip unit. That 250 A holds flat through 50 °C — above that it derates to 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. If your panel ambient runs warm, the 55 °C figure is the one to size against, not the catalogue 250 A. Interrupting capacity is 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. That 187 kA at 240 V covers high-fault utility feeds; the drop to 4.5 kA at 690 V means it is not the breaker for a 690 V motor branch with high available fault current — check the point-on-wave coordination study before committing. Rated insulation voltage (Ui) is 800 V. The ETU320 is an electronic trip — adjustable thermal-magnetic curves are not what you get here. This unit is line-protection version, no ground-fault monitoring, no undervoltage release, no communication module.
Footprint and panel fit
Dimensions: 105 mm wide, 181 mm high, 86 mm deep. IP40 on the front face — fine for a clean indoor panel; not rated for washdown or dust. The auxiliary contact configuration is 2 auxiliary switches plus 1 trip alarm switch (HQ type), which gives three separate signal paths for status feedback to a PLC or annunciator panel.