The Siemens SENTRON 3VA1163-6GF46-0AA0 is a 4-pole molded case circuit breaker rated at 63 A continuous, with a TM240 thermal-magnetic overcurrent release. It's designed for line protection in distribution panels and switchgear assemblies, with an insulation voltage rating of 800 V.
Breaking capacity and selectivity
This MCCB delivers 220 kA at 240 V, 154 kA at 415 V, and 121 kA at 440 V — figures that place it in the high-interrupting category for large industrial services or transformer secondaries. At 500 V and 690 V the rating drops to 17 kA, which still covers most motor-circuit fault levels on 480 V and 600 V class systems. The 4-pole construction handles three-phase plus neutral, common in North American and European panel builds where a switched neutral is required.
Thermal derating curve
The 63 A rating holds flat from 40 °C through 50 °C, then tapers to 62 A at 55 °C, 61 A at 60 °C, 60 A at 65 °C, and 58 A at 70 °C. That means in a tightly packed panel with ambient near 60 °C you lose about 3% of headroom — not enough to force a frame upsizing for most loads, but worth checking if the circuit is already loaded to 60 A continuous.
Physical fit and panel integration
Dimensions are 130 mm height, 101.6 mm width, 70 mm depth — a standard 4-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures without re-drilling. Front protection is IP40, meaning tools and fingers stay out but the unit is not sealed against washdown. Operating range is -25 °C to 70 °C; storage range is -40 °C to 80 °C.