63 A MCCB with high interrupting capacity
The Siemens SENTRON 3VA2163-6HN36-0CA0 is a 3-pole molded case circuit breaker (MCCB) rated for continuous current of 63 A across ambient temperatures up to 50 °C, with a slight derating curve above that — 60.6 A at 55 °C, down to 53.6 A at 70 °C. Its headline breaking capacity hits 242 kA at 240 V AC, falling to 187 kA at 415/440 V, 121 kA at 500 V, and 5 kA at 690 V. That 242 kA figure at 240 V means it can interrupt a fault current that high without the arc re-striking or the case rupturing — critical for high-fault installations like transformer secondaries or large motor control centers where available fault current can exceed 100 kA.
ETU350 release and undervoltage protection
This MCCB ships with an ETU350 electronic trip unit — a microprocessor-based release that provides adjustable long-time, short-time, and instantaneous protection curves, plus ground-fault alarm capability (though the ground-fault monitoring version here is listed as without). The undervoltage release (UVR) is integrated as standard, wired to trip the breaker when control voltage drops below a set threshold — common for safety circuits that need to drop power on loss of control supply. The UVR design uses a separate auxiliary trip coil (order code 3VA9608-0BB24) that can be replaced independently. Rated insulation voltage is 800 V, so it handles 480/600 V systems with margin.
Physical fit and panel integration
Dimensions are 181 mm height, 105 mm width, and 86 mm depth — a compact footprint for a 63 A MCCB with 242 kA interrupting capacity. The 105 mm width is the standard 3-pole SENTRON 3VA2 frame width, so it drops into existing panel cutouts and bus-bar systems designed for that frame. No auxiliary contacts are included (auxiliary contact version: without), so if you need status feedback to a PLC or indicator light, you'll add a separate auxiliary switch block. Maximum power dissipation is 6.5 W at rated current — manageable for thermal budgeting inside a sealed enclosure, but worth checking if the panel is densely packed.