63 A MCCB with ETU350M — motor protection that tracks the pressure curve
The Siemens SENTRON 3VA2163-5MN36-0CA0 is a 3-pole molded case circuit breaker rated 63 A continuous, built for motor protection duty. The ETU350M electronic release gives you adjustable overload and short-circuit curves, so you can dial in the trip characteristic to match the inrush and running profile of a pump, conveyor, or compressor — every shot the same, no nuisance trips on start-up.
Interrupting capacity — selectivity headroom across voltage tiers
This MCCB delivers 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V. That spread lets you coordinate downstream with smaller branch breakers while keeping the main tie intact — the 187 kA figure at 240 V is especially useful for high-fault panels fed by large transformers. Rated insulation voltage is 800 V, so the 690 V interrupting rating is within the design envelope.
Panel fit — 105 mm wide, 86 mm deep
At 105 mm wide by 86 mm deep by 181 mm tall, this breaker fits a standard MCCB footprint. The 3-pole block with undervoltage release (UVR) and phase failure detection built in means no external relay for loss-of-phase protection — one less device to wire and one less terminal to torque. Maximum power loss is 75 W, so account for that heat in a sealed enclosure.
Thermal derating — holds 63 A up to 50 °C
The 63 A continuous rating holds flat from 40 °C to 50 °C. At 55 °C it derates to 60.48 A, at 60 °C to 59.22 A, at 65 °C to 57.96 A, and at 70 °C to 56.7 A. If the panel ambient runs above 50 °C, size the breaker one frame up or accept the reduced ampacity. Operating range is -25 °C to 70 °C; storage from -40 °C to 80 °C.