What this MCCB carries
The Siemens SENTRON 3VA2163-5HL36-0CA0 is a 3-pole molded case circuit breaker (MCCB) rated for 63 A continuous current at 40 °C through 70 °C — no derating needed across that full ambient span, which simplifies panel layout in warm enclosures. Breaking capacity runs 187 kA at 240 V, drops to 121 kA at 415 V and 440 V, then 75.6 kA at 500 V, and 3.7 kA at 690 V. That 187 kA at 240 V is the headline number for high-fault panels on the secondary side of a 480 V–208Y/120 V transformer. Rated insulation voltage is 800 V.
Line protection and the undervoltage release
This variant is designated for line protection — it's the feeder breaker, not a motor circuit protector. The built-in undervoltage release (UVR) trips the breaker when control voltage drops below a set threshold, which is standard for emergency-stop chains or undervoltage ride-through schemes where you want the load disconnected on a brownout. The UVR is a separate auxiliary release, not a shunt trip — it holds the breaker closed only while control voltage is present. Lose the control supply, and the breaker opens. That's the distinction for the panel builder wiring the control circuit.
Dimensions and panel fit
At 105 mm wide, 181 mm tall, and 86 mm deep, this 3-pole MCCB fits standard SENTRON 3VA mounting footprints. The 86 mm depth is the key dimension for gland-plate clearance in shallow backpanels — verify your enclosure depth before committing the cutout. Maximum power loss is 6.5 W, which is modest for a 63 A frame. No forced ventilation needed in most enclosures, but account for it in the thermal budget if the panel is densely packed.