The Siemens 3VA2063-5HN36-0CC0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in commercial and industrial distribution panels. It carries a continuous current rating of 63 A across the full operating temperature range from -25 °C to 70 °C, with no derating needed up to 70 °C ambient. The 756 A frame size gives you headroom on the bus for future load growth without swapping the breaker chassis.
Breaking capacity and fault clearance
This 3-pole MCCB delivers 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V. At 415 V, that 121 kA rating means it can safely interrupt a fault current up to that level without cascading upstream — critical for high-fault installations like transformer secondaries or large motor control centers. The 3 kA at 690 V covers 690 V line-to-line systems common in mining and marine applications, though the continuous rating stays at 63 A.
Integrated undervoltage release and auxiliary switches
The breaker ships with an undervoltage release (UVR) as the auxiliary release type and two HQ auxiliary switches built in. The UVR trips the breaker when control voltage drops below a threshold, which is standard for emergency-stop circuits or undervoltage protection on motor feeders. The two auxiliary switches provide status feedback (open/closed) to a PLC or indication lamp without needing an external add-on block. The basic switch assembly is order code 3VA20635HN360AA0.
Physical fit and panel integration
Dimensions are 105 mm wide, 181 mm tall, and 86 mm deep. The 105 mm width is a 3-pole MCCB standard footprint — it occupies three 35 mm DIN-rail module spaces. Depth of 86 mm fits standard distribution boards with 100 mm+ backpan depth. Panel builders should verify gland-plate clearance for the 86 mm projection plus cable bending radius.