What it is and what it does
The Siemens SENTRON 3VA2225-6JQ32-0AB0 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 industrial switchboards. Its interrupting capacity reaches 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 — figures that govern selectivity coordination and SCCR compliance in high-fault installations. The breaker includes a communication function for integration into monitoring or energy-management systems, and carries two auxiliary switches (HP design) for remote status indication.
Current rating and thermal derating
Rated 250 A from 40 °C through 50 °C ambient; derates to 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. The thermal trip adjustment range is 50 A to 250 A (full-scale). No undervoltage release or voltage-trip accessory is fitted; the auxiliary release slot is empty, so any add-on must be ordered separately.
Physical fit and environment
Dimensions: 181 mm height, 105 mm width, 86 mm depth. Mounts in a standard panel or enclosure footprint for 3-pole MCCBs of this frame size. Operating temperature range -25 °C to 70 °C; storage range -40 °C to 80 °C. Maximum power loss is 48 W.