The Siemens SENTRON 3VA2163-5MN32-0JA0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous at 40 °C, built for motor protection duty with an ETU350M electronic trip unit. It carries a 187 kA interrupting capacity at 240 V AC, stepping down to 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V — numbers that matter when you're coordinating with upstream gear in a high-fault panel. This is a motor-protection MCCB, so it includes phase-failure detection and a voltage-trigger function. The shunt-trip release (STL) design lets you remotely open the breaker, and the integrated auxiliary trip is the 3VA9688-0BL32. No auxiliary contact block is fitted, and there's no ground-fault monitoring or communication module on this variant.
Thermal derating and endurance
The 63 A rating holds steady up to 50 °C ambient. Above that, it derates: 60.48 A at 55 °C, 59.22 A at 60 °C, 57.96 A at 65 °C, and 56.7 A at 70 °C. If your panel runs hot — say a crowded enclosure with drives — factor that drop before sizing. Mechanical endurance is 20 000 operations, which is typical for this class. Max power loss through the breaker is 75 W. Operating temperature range is -25 °C to 70 °C; storage goes from -40 °C to 80 °C. Rated insulation voltage is 800 V.
Physical fit and panel integration
The breaker measures 105 mm wide, 181 mm high, and 86 mm deep. That width is a standard 3-pole MCCB footprint — it'll drop into a SENTRON 3VA panel mount without surprises. No trip indicator on the front face, so you'll need to check the ETU status via the trip unit's own LED or a remote signal.