What this MCCB delivers — and what the ratings mean for your panel
The Siemens SENTRON 3VA2163-5HL32-0KH0 is a 3-pole molded case circuit breaker (MCCB) rated 63 A continuous current (Iu) with an ETU320 electronic trip unit, built for line protection in distribution panels and motor control centers. The 187 kA interrupting capacity at 240 V and 121 kA at 415 V mean it can safely clear high-fault currents without cascading upstream — critical for maintaining selectivity in a multi-level distribution system. The ETU320 release provides adjustable thermal-magnetic or electronic protection curves, so you can coordinate downstream breakers without nuisance trips. A shunt trip (STL) is integrated for remote emergency-off or undervoltage control, and the auxiliary contact block (2 auxiliary switches + 1 trip alarm switch HQ) gives the PLC a clean status signal on open/closed/tripped states. The 63 A rating holds flat from 40 °C up to 50 °C, then derates linearly to 53.55 A at 70 °C — so in a warm enclosure near the top of the ambient range you still have headroom for a 50 A continuous load. The 800 V rated insulation voltage (Ui) covers 480 V and 600 V class systems with margin.
Panel fit and mounting — what the dimensions mean for your layout
The 3VA2163-5HL32-0KH0 measures 105 mm wide × 181 mm high × 86 mm deep. That 105 mm width is the standard 4-module (4 x 27 mm) footprint for SENTRON 3VA breakers in this frame size — it clips onto the DIN rail or mounts directly to a backplate with the supplied screws. The 86 mm depth leaves room behind a 200 mm deep enclosure for wiring and busbar connections. Verify the gland-plate cutout matches the 105 mm width if you're retrofitting into an existing panel; the 3VA frame is wider than a typical 3-pole miniature breaker, so a pre-punched 3-module opening won't work without an adapter plate.
How it compares to a common sibling — 3VA1010-2ED32-0JA0
The 3VA1010-2ED32-0JA0 is a smaller-frame 3VA (100 A frame, typically 3-pole) with a lower interrupting rating and a thermal-magnetic release. The 3VA2163-5HL32-0KH0 uses the larger 3VA2 frame (160 A frame) with an ETU320 electronic trip, giving you adjustable protection curves and higher SCCR — 187 kA vs roughly 65 kA at 240 V for the 3VA1010. If your panel was specified around the 3VA1010-2ED32-0JA0, this 3VA2163 will not drop in without rewiring: the 3VA2 frame is physically larger (105 mm wide vs 70 mm for the 3VA1 frame), and the terminal spacing differs. Stick with the original frame size unless you are redesigning the panel layout.