Siemens SENTRON 3VA2163-7MN36-0AC0 MCCB, 63 A, 3-pole, Motor

The Siemens SENTRON 3VA2163-7MN36-0AC0 is a 3-pole molded case circuit breaker rated 63 A continuous current, built for motor protection duty. The ETU350M electronic overcurrent release provides adjustable thermal-magnetic curves with phase failure detection — so it catches a dropped phase on a three-phase motor load before the winding cooks. No undervoltage release, no ground-fault module, no communication stack: this is a standalone thermal-magnetic MCCB for a motor branch circuit, not a power-monitoring node. SCCR is the headline number here. At 240 V the breaker interrupts 330 kA; at 415 V and 440 V it holds 242 kA, and at 690 V it still clears 52.5 kA. Those are high-fault ratings — typical for a large-frame industrial MCCB installed at the service entrance or feeding a motor control center where available fault current exceeds 100 kA. The 63 A rating is flat from 40 °C through 50 °C, then derates to 60.48 A at 55 °C and 56.7 A at 70 °C. If the panel ambient runs above 50 °C, the continuous load stays under 57 A. Physical fit: 105 mm wide, 181 mm tall, 86 mm deep. Fixed mount — no DIN-rail clip on this frame size. The 2 auxiliary switches (HQ type) are pre-installed; the integrated auxiliary trip is order code 3VA9688-0BL33. Max power dissipation is 75 W, so the panel ventilation needs to move that heat. Latching endurance is 20 000 cycles — mechanical life is higher, but the latching mechanism is the wear item for frequent switching applications.