The Siemens SENTRON 3VA2225-6HL32-0BL0 is a 3-pole molded case circuit breaker (MCCB) rated for 250 A continuous current, designed for line protection in industrial distribution panels. Its 242 kA breaking capacity at 240 V AC means it can safely interrupt fault currents up to that level without cascading upstream — critical for high-fault installations like transformer secondaries or large motor control centers.
Breaking capacity and selectivity
Breaking capacity drops from 242 kA at 240 V to 187 kA at 415/440 V, then to 121 kA at 500 V, and 4.5 kA at 690 V. The steep fall at 690 V means this breaker is optimized for 240–500 V systems; at 690 V the SCCR is only 4.5 kA, so verify the available fault current if deploying on a 690 V line. The adjustable thermal-magnetic trip unit covers 375 A to 2 500 A maximum setting range, giving flexibility to coordinate with downstream breakers in a selective distribution scheme.
Thermal derating and ambient conditions
Rated 250 A continuous from 40 °C up to 50 °C ambient, then derates linearly to 213 A at 70 °C. In a sealed panel with poor airflow, expect to apply the 70 °C column. Operating range is -25 °C to +70 °C; storage from -40 °C to +80 °C. Dimensions are 105 mm wide, 181 mm high, 86 mm deep — fits standard Siemens 3VA panel cutouts and busbar arrangements. The 86 mm depth is shallow enough for most 600 mm deep enclosures with room for cable bending radius behind it.
Auxiliary and release configuration
Factory-fitted with an undervoltage release (UVR) plus 2 auxiliary switches, 1 trip alarm switch, and 1 electrical alarm switch HQ. The UVR trips the breaker when control voltage drops below threshold — standard for safety circuits that need a dropout on power loss. No ground-fault monitoring or communication module on this variant. Maximum power loss is 50.5 W at rated current — factor this into enclosure thermal calculations, especially when grouping multiple breakers.