The Siemens SENTRON 3VA1063-3ED32-0HC0 is a 3-pole molded case circuit breaker rated 63 A continuous at 40 °C, built around the TM210 thermal-magnetic overcurrent release. It is a line-protection device — no ground-fault monitoring, no undervoltage release, no communication module — just straightforward overcurrent and short-circuit interruption for a 3-phase feeder or downstream distribution.
Breaking capacity across voltage levels
This breaker delivers 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 7.5 kA at 690 V. The sharp drop at 690 V means it is sized for 400 V-class distribution — at 690 V the interrupting rating is low enough that you need to check coordination with upstream protection if the fault current exceeds that figure. For DC networks, the device manual covers derating.
Thermal derating curve
The breaker holds 63 A from 40 °C through 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 continuous load against the derated figure — not the 63 A nameplate.
Physical fit and auxiliary contacts
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep. The width is a standard 3-pole MCCB footprint for this SENTRON generation — it fits existing 3VA panel cutouts and busbar arrangements. Two auxiliary switches (HQ type) are integrated; the shunt trip (STL) release is built in, with the auxiliary trip designated 3VA9688-0BL30. Front protection is IP40, so it is suited for enclosed panel mounting rather than open washdown areas.