630 A MCCB with high interrupting capacity
The Siemens SENTRON 3VA2463-5JP32-0DH0 is a 3-pole molded case circuit breaker rated for 630 A continuous current at 40 °C, designed for line protection in distribution panels. Its interrupting capacity reaches 187 kA at 240 V and 121 kA at 415 V and 440 V, dropping to 75.6 kA at 500 V and 9 kA at 690 V — the 240 V and 415 V figures are what you size SCCR against in North American and IEC panels respectively. The minimum trip setting is 945 A, maximum 5 670 A, giving a 1.5x to 9x I_r adjustment band for coordinating downstream feeders. Thermal derating is published: 630 A at 40 °C, 600 A at 45 °C, 570 A at 50 °C, 540 A at 55 °C, 510 A at 60 °C, 480 A at 65 °C, and 450 A at 70 °C. If the panel ambient runs above 40 °C, the continuous rating must be adjusted per these values — a common miss when repurposing a standard 630 A frame into a hot enclosure.
Built-in auxiliaries and communication
This variant ships with 2 auxiliary switches plus 1 trip alarm switch (HQ design) and an undervoltage release (UVR). The UVR trips the breaker when control voltage drops — standard for emergency-stop chains or undervoltage protection schemes. A communication function is onboard, though the protocol isn't specified here; expect it to interface with the SENTRON power monitoring ecosystem. The basic switch core is order code 3VA2463-5JP32-0AA0, which means the auxiliaries and release are factory-integrated, not field-added.
Physical fit and environmental limits
Dimensions are 110 mm deep, 138 mm wide, 248 mm tall — a standard MCCB footprint for 630 A frames. Operating temperature range is -25 °C to 70 °C; storage from -40 °C to 80 °C. Maximum power loss is 164.5 W, so ventilation around the breaker matters in a sealed enclosure.