Siemens SENTRON 3VA2063-5JQ32-0JH0 — Molded Case Circuit Breaker, 63 A, 3-Pole
The Siemens SENTRON 3VA2063-5JQ32-0JH0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C, with a full-scale value of 63 A and an adjustable thermal-magnetic trip range from 95 A minimum to 756 A maximum. Its breaking capacity reaches 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V — so it handles high-fault-current service entrances and distribution feeders without cascading upstream. This MCCB is designed for line protection (cable/feeder protection) and carries a shunt trip (STL) release plus two auxiliary switches and one trip alarm switch (HQ configuration), making it suitable for remote tripping and status feedback in a control panel. The unit includes a trip indicator and a voltage trigger, and supports communication functions for integration into higher-level monitoring systems. The 3VA2063-5JQ32-0JH0 mounts on a DIN rail or panel-mount footprint with dimensions of 181 mm height, 105 mm width, and 86 mm depth — a standard SENTRON frame size that fits existing 3VA-series panel layouts without re-drilling. Operating temperature range is -25 °C to 70 °C, with storage from -40 °C to 80 °C. Maximum power loss is 5.4 W.
What the Ratings Mean for Fit
The 63 A rating is maintained across the full 40 °C to 70 °C ambient range — no derating needed in a warm enclosure. The adjustable trip range (95 A minimum to 756 A maximum) means the breaker can be set to protect a feeder sized for 95 A cable, while the magnetic instantaneous pickup can be dialed up to 756 A to avoid nuisance tripping on motor inrush.