The Siemens SENTRON 3VA2163-5HM36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current, designed for line protection in distribution panels. Its 121 kA breaking capacity at 415 V AC means it can safely interrupt fault currents up to that level without upstream cascading—critical for high-fault installations like transformer secondaries or large motor control centers. The 800 V rated insulation voltage gives headroom for 690 V systems.
Breaking capacity across voltages
This MCCB delivers 187 kA at 240 V AC, 121 kA at both 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. The steep drop at 690 V is typical for a 63 A frame—the arc extinction limits at higher voltage. For 690 V applications, verify the available fault current stays under 3.7 kA or step to a higher-rated frame.
Thermal performance and ambient derating
The breaker holds its full 63 A rating from 40 °C through 70 °C ambient—no derating needed across the typical panel temperature range. Operating ambient spans -25 °C to 70 °C, storage from -40 °C to 80 °C. Maximum power loss is 4 W, negligible for enclosure heat calculations.
Ground-fault monitoring and protection design
The unit includes summation current ground-fault monitoring on the line conductors—it measures vector sum of the phase currents to detect leakage to earth. This is a line-protection variant (not motor protection), so no undervoltage release, no voltage trigger, and no communication function are fitted. The adjustable thermal-magnetic trip range is 95 A minimum to 756 A maximum, with a fixed 16 A initial setting.
Panel integration
Dimensions are 105 mm wide, 181 mm high, 86 mm deep—fits standard MCCB panel cutouts and busbar spacing for 3-pole frames. No DIN-rail mount; direct screw-mount to the backplate or busbar system.