What it is and what it carries
The Siemens SENTRON 3VA2225-6HL32-0DH0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, designed for line protection in distribution panels and switchgear assemblies. Breaking capacity is 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 4.5 kA at 690 V — the 690 V figure is the weak point; if your system runs at that voltage, this breaker is not the right choice for high-fault duty. The auxiliary switch configuration is 2 auxiliary switches plus 1 trip alarm switch (HQ type), and the undervoltage release (UVR) is factory-fitted — no field retrofit needed for that function.
Current derating and thermal limits
At 40 °C, 45 °C, and 50 °C the breaker holds full 250 A rating. Derating begins at 55 °C (241 A), dropping to 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. If your panel ambient runs hot, size the load accordingly — the 70 °C figure is 15% below the nameplate. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 50.5 W — account for that in enclosure thermal calculations.
Physical fit and integration
Dimensions: 105 mm wide, 181 mm high, 86 mm deep. Mounts in standard panel cutouts for 3-pole MCCBs of this frame size — verify the mounting footprint against your existing busbar or DIN-rail adapter. The basic switch variant is order code 3VA2225-6HL32-0AA0; this -0DH0 suffix adds the undervoltage release and the specific auxiliary switch complement.