The Siemens 3VA2163-5MN32-0AA0 is a SENTRON molded case circuit breaker (MCCB) built for motor protection — not just branch-circuit overcurrent. Its 63 A continuous rating holds flat from 40 °C through 70 °C (no derating needed across that band), and the adjustable trip class (10A, 10E, 20E) lets you match the thermal curve to the motor start profile. Phase failure detection is built in, so a single-phasing condition trips the breaker before the winding overheats.
Breaking capacity and selectivity
The interrupting ratings span the common industrial voltages: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. At 415 V, that 121 kA SCCR gives you headroom for high-fault panels without cascading upstream — useful when the transformer is close to the switchboard. The 800 V rated insulation voltage supports 690 V line-to-line systems with margin.
Panel fit and mounting
The 3-pole frame measures 105 mm wide, 181 mm tall, and 86 mm deep — a standard MCCB footprint that drops into most SENTRON distribution panels and switchboard cubicles without re-drilling the mounting plate. Maximum power loss is 4 W, so heat buildup inside a sealed enclosure stays manageable.