The Siemens 3VA2463-5HR32-0AA0 is a 3-pole IEC frame 630 molded-case circuit breaker with a 55 kA interrupting capacity at 415 V (class M). It carries an ETU345 LI electronic trip unit configured for line protection — the LI curve means long-time and instantaneous protection, no short-time delay. Rated continuous current In is 630 A, but the overload protection (Ir) is adjustable from 252 A to 630 A, and the instantaneous pickup Ii is fixed at 9 × In (5670 A). This is a busbar-connected unit, so it lands directly on a panel bus, not a line-side cable.
What the Ratings Mean for Fit
The 55 kA Icu at 415 V puts this in the 'M' (medium) breaking capacity class per IEC 60947-2 — it handles high fault currents typical of industrial main feeders or large sub-distribution boards without needing an upstream current-limiting fuse. The ETU345 LI trip unit is electronic, so it offers better accuracy and adjustability than a thermal-magnetic breaker; the Ir adjustment range (252–630 A) lets you match the breaker to the actual load without changing the frame. The lack of overload protection (the description flags 'without overload protection') means this unit is intended for use where the overload function is handled elsewhere — typically a separate overload relay for motor circuits, or a downstream feeder breaker. The instantaneous pickup at 9 × In is a fixed value, so coordination studies should account for that threshold.
Deployment Context
This breaker mounts in a switchboard or panel via the busbar connection — no DIN-rail adapter, it bolts directly to the bus. The 3VA2 frame is the 630 A frame size; panel cutouts and bus spacing follow the standard 3VA2 footprint. For an OEM panel builder, the busbar connection saves wiring time on the main feed, but verify the busbar center-to-center spacing matches your panel layout.