What this MCCB carries — and what that means for your panel
The Siemens SENTRON 3VA2163-5HN36-0CH0 is a 3-pole molded case circuit breaker rated for 63 A continuous current across its full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. 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. That 187 kA figure at 240 V means it can safely interrupt very high fault currents on the secondary side of a distribution transformer without cascading upstream — a serious SCCR headroom for industrial panel coordination studies. This is a line-protection design, not a motor-protective or feeder-only breaker. It ships with an undervoltage release (UVR) and a complement of 2 auxiliary switches plus 1 trip alarm switch. The UVR drops the breaker when control voltage falls below its dropout threshold — useful for safety circuits that need to guarantee a disconnect on loss of control power.
Physical fit — what the 86 mm depth means for panel layout
Dimensions: 86 mm deep, 105 mm wide, 181 mm tall. The 86 mm depth is the critical number for enclosure depth — standard 200 mm deep enclosures leave comfortable wiring space behind the breaker. Width of 105 mm for a 3-pole MCCB is typical for the SENTRON 3VA frame; it occupies roughly 4 inches of DIN-rail or mounting-plate width. Verify gland-plate clearance for the UVR wiring and auxiliary switch cables before final assembly.
What you get in the box — auxiliary releases and switches
Factory-fitted: undervoltage release (UVR) as the auxiliary release, plus 2 auxiliary switches and 1 trip alarm switch. No ground-fault monitoring version, no communication function, no voltage trigger. The trip indicator is present — a visual flag on the breaker face shows tripped state without needing to read the handle position.