What this MCCB carries
The Siemens 3VA2225-8HL32-0DA0 is a SENTRON 3VA2 molded case circuit breaker rated for 250 A continuous current (at 40 °C through 50 °C) and designed for line protection. It is a 3-pole unit with an integrated undervoltage release (UVR) — the auxiliary release type is specified as undervoltage release. The supplied basic switch is order code 3VA2225-8HL32-0AA0.
Breaking capacity — what it means for fault duty
Breaking capacity is voltage-dependent and ranges from 440 kA at 240 V down to 52.5 kA at 690 V. At 415 V and 440 V it holds 330 kA; at 500 V it drops to 220 kA. This tells you the maximum fault current the breaker can safely interrupt at each voltage level — critical for SCCR coordination studies. If your available fault current at the panel bus exceeds these numbers at the operating voltage, you need a higher-rated upstream device or a current-limiting feeder.
Thermal derating and ambient limits
The 250 A continuous rating holds from 40 °C to 50 °C ambient. Above that it derates linearly: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. Operating ambient range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 50.5 W — factor that into enclosure thermal calculations if the panel is tightly packed.
Physical fit and panel integration
Dimensions are 105 mm wide, 181 mm high, 86 mm deep. This is a standard 3-pole MCCB footprint for DIN-rail or panel-mount installation. No communication function, no ground-fault monitoring, no auxiliary switch — the only integrated release is the undervoltage release. Trip indicator is not fitted; voltage trigger is absent.