SENTRON 3VA2225-5HN42-0DL0 — 250 A, 4-Pole MCCB with ETU350 Trip Unit
The Siemens 3VA2225-5HN42-0DL0 is a SENTRON molded case circuit breaker (MCCB) rated for a continuous current Iu of 250 A across a 4-pole configuration, configured for line protection duty. The ETU350 electronic trip unit manages overcurrent and short-circuit response, with a maximum power loss of 50.5 W at rated load. Breaking capacity is voltage-dependent: 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 5.1 kA at 690 V. These values define the maximum fault current the breaker can safely interrupt at each voltage level — critical for verifying SCCR coordination with downstream equipment. Thermal derating begins above 50 °C ambient: the breaker carries 250 A continuously up to 50 °C, then drops to 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. For a panel running near its upper temperature limit, this curve governs whether the breaker can hold the load without nuisance tripping.
Physical Fit and Auxiliary Configuration
Dimensions are 181 mm high, 140 mm wide, and 86 mm deep. The width is the critical panel-space dimension for multi-breaker lineups — confirm the mounting footprint against the existing switchboard cutout or DIN-rail adapter plate. The breaker ships with an integrated undervoltage release (UVR) as the auxiliary release type, plus a 2+1+1 auxiliary contact block: two auxiliary switches, one trip alarm switch, and one electrical alarm switch (HQ type). The basic switch is order code 3VA2225-5HN42-0AA0; the integrated auxiliary trip is 3VA9608-0BB25.