Siemens 3VA2225-5HL32-0DF0 — 250 A SENTRON MCCB for Line Protection
The Siemens 3VA2225-5HL32-0DF0 is a SENTRON molded case circuit breaker (MCCB) rated for 250 A continuous current at 40 °C, configured as a 3-pole line-protection device with an integrated undervoltage release and a 1 auxiliary switch plus 1 trip alarm switch (HQ design). Its interrupting capacity reaches 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 — figures that define the fault-current headroom available for selective coordination downstream. The breaker carries a trip indicator and an undervoltage release as standard, and is designed without communication function or ground-fault monitoring.
Thermal Derating and Operating Range
The 250 A rating holds from 40 °C through 50 °C ambient; above that it derates linearly to 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. Operating temperature spans -25 °C to 70 °C, with storage from -40 °C to 80 °C. Maximum power loss is 50.5 W, a figure to account for in enclosure thermal calculations when the breaker is fully loaded.
Physical Fit and Panel Integration
Dimensions are 181 mm height, 105 mm width, and 86 mm depth — a standard 3-pole MCCB footprint that fits SENTRON 3VA2 panel cutouts and busbar systems. The 86 mm depth (3.39 in) is the dimension to check against enclosure gland-plate clearance and door-mounted operator mechanisms.