What the ratings mean for fit
The Siemens SENTRON 3VA2163-7MS36-0JA0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous at ambient temperatures from 40 °C through 70 °C — no derating needed across that span, which simplifies panel design in warm enclosures. Its maximum current rating of 945 A and minimum of 189 A define the adjustable thermal-magnetic trip range, so it can be set to protect a motor or feeder branch without swapping the breaker frame. The interrupting capacity tells you where it clears faults: 330 kA at 240 V AC, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. At 690 V the drop to 3.7 kA means this breaker is not the right choice for high-voltage motor circuits; it is sized for 400 V class distribution where the full 242 kA SCCR is available.
Deployment context
This MCCB is designed for starter protection — it integrates directly with motor starters in a panel, handling overload and short-circuit protection in one device. The shunt trip release (STL) allows remote tripping from a safety circuit or emergency-stop chain, which is common in conveyor and pump panels. Dimensions are 86 mm deep, 105 mm wide, and 181 mm high, fitting standard MCCB mounting footprints in industrial enclosures.