What this MCCB does and what the ratings mean
The Siemens 3VA2063-5HL36-0DA0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) rated for line protection in distribution panels. It carries a continuous current of 63 A across the full ambient temperature range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel layout in warm enclosures. The interrupting capacity hits 187 kA at 240 V AC, 121 kA at 415 V, and 75.6 kA at 500 V; at 690 V it drops to 3 kA, so this breaker is sized for low-voltage main or feeder duty, not 690 V branch circuits. The 3-pole design with an integrated undervoltage release (UVR) means it can be wired to drop out on loss of control voltage — common for emergency-stop or safety isolation schemes.
Physical fit and panel integration
Dimensions are 105 mm wide, 181 mm tall, and 86 mm deep — a standard 3-pole MCCB footprint that mounts on a DIN rail or directly to a backplate. The 86 mm depth leaves clearance for wiring gutters in a 200 mm deep enclosure. Power loss is 7.9 W maximum, so heat dissipation inside a sealed panel is manageable without forced ventilation in most layouts.
Selectivity and coordination note
With a minimum trip threshold of 95 A (adjustable) and a maximum of 756 A, the breaker offers a wide magnetic trip band for selective coordination with downstream branch breakers. The insulation voltage is rated 800 V, giving headroom for 480 V and 600 V class systems. For a line-up with a 3VA2116-5HL32-0AK0, the physical footprint and terminal layout are the same series — a direct mechanical swap without rewiring the bus bars, provided the continuous current and interrupting ratings match the fault study.