The Siemens 3VA2163-5MN36-0JA0 is a SENTRON 3VA2 molded case circuit breaker (MCCB) built for motor protection — 63 A continuous rating across the full ambient range from 40 °C to 70 °C, so no derating headache when the panel runs hot. Three poles, shunt trip release (STL) for remote opening, and phase failure detection onboard. Breaking capacity hits 187 kA at 240 V, 121 kA at 415/440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V — covers most industrial distribution levels without a second fuse.
What the ratings mean for fit
The 63 A frame holds solid from 40 °C to 70 °C ambient — no reduction needed even in a crowded enclosure near a drive or transformer. That 4 W max power loss is low enough to skip forced ventilation in most panels. The shunt trip (STL) release lets a PLC or E-stop circuit drop the breaker remotely; undervoltage release is absent, so if your safety circuit relies on UVR, this isn't the variant. Motor protection design means the trip curve is shaped for motor inrush — not a straight thermal-magnetic for general distribution.
Mounting and panel fit
Dimensions: 105 mm wide, 181 mm high, 86 mm deep — standard 3-pole MCCB footprint for the 3VA2 family. Mounts on a DIN rail or direct panel; the 86 mm depth leaves room behind the gland plate for wiring. No communication function — this is a standalone breaker, not a power-monitoring node.