What this MCCB delivers on the line
The Siemens 3VA2163-5HN32-0KL0 is a SENTRON molded case circuit breaker rated for 63 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. Three poles, line-protection design, with a maximum interrupting capacity of 187 kA at 240 VAC and 121 kA at 415 VAC. That 187 kA figure at 240 V tells you this breaker handles high-fault utility feeds or transformer secondaries without cascading upstream. The 63 A frame is the one you spec for a 63 A feeder or a motor branch circuit where the full-load amps sit under that threshold.
Breaking capacity by voltage — where it fits
Interrupting ratings step down with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. That 690 V figure is low — this is a 480 V class breaker, not a 690 V main. For a 480 V distribution panel with available fault current under 75 kA, it clears comfortably. The 187 kA at 240 V is the standout number for high-capacity 240 V services.
Built-in accessories and physical fit
Comes with a shunt trip (STL) for remote opening, plus two auxiliary switches, one trip alarm switch, and one electrical alarm switch — all factory-integrated. No ground-fault monitoring module. Dimensions: 105 mm wide, 181 mm high, 86 mm deep. That 86 mm depth is the panel depth you need behind the door; the 105 mm width is three-pole standard for this frame. The basic switch assembly is order code 3VA21635HN320AA0. No communication module onboard — this is a standalone thermal-magnetic trip unit.
Lifecycle and sourcing posture
Listed as current production. This is the active SENTRON 3VA generation. Sourced to order against an RFQ through independent distribution.