The Siemens SENTRON 3VA2163-7MS32-0CC0 is a 3-pole molded case circuit breaker (MCCB) designed for starter protection — meaning its trip curve and auxiliary release are matched to motor-starting inrush rather than general distribution loads. It carries 63 A continuously across the full ambient range from 40 °C to 70 °C with no derating needed, which simplifies panel thermal budgeting when the breaker sits near other heat sources.
Breaking capacity and trip range
Breaking capacity hits 330 kA at 240 V and 242 kA at 415/440 V, then drops to 187 kA at 500 V and 3.7 kA at 690 V. That 3.7 kA figure at 690 V is the hard limit — if your motor circuit runs at 690 V and the available fault current exceeds that, this breaker is not the right fit. The adjustable thermal-magnetic trip range spans 189 A minimum to 945 A maximum, which covers motor FLA from roughly 75 A to 380 A depending on the tap setting.
Starter protection and undervoltage release
The starter-protection design (design code 7MS32) integrates an undervoltage release (UVR) that drops the breaker if control voltage falls below the dropout threshold — standard for motor control centers where a voltage sag should trip the starter rather than let it re-accelerate uncontrolled. The UVR is factory-fitted; no field kit required. Two HQ auxiliary switches are included for status feedback to the PLC or HOA station.
Physical fit and environment
Dimensions are 105 mm wide, 181 mm high, 86 mm deep — a standard SENTRON 3VA frame that drops into the existing panel footprint without re-drilling the mounting plate. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. Maximum power loss is 6.5 W, negligible for enclosure heat-load calculations.