63 A MCCB with ETU850 — 330 kA interrupting at 240 V
The Siemens 3VA2163-7KP36-0AA0 is a SENTRON molded case circuit breaker (MCCB) designed for line protection in distribution panels. It carries a continuous rated current of 63 A across the full ambient temperature range from 40 °C to 70 °C (–), meaning no derating is needed for typical panel environments — a practical advantage when sizing for a warm enclosure. The interrupting ratings are the headline: 330 kA at 240 V AC, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V. That 330 kA figure at 240 V means this breaker can be applied on high-fault-capacity services — think large transformer secondaries or busway taps — where standard 65 kA or 100 kA MCCBs would not hold coordination. The ETU850 electronic trip unit provides adjustable long-time, short-time, instantaneous, and ground-fault protection curves. The trip range spans 95 A minimum to 756 A maximum, covering motor feeders, transformer primaries, and general distribution. Communication function is onboard, enabling integration with energy management or remote monitoring systems — useful for a plant engineer tracking load profiles without a panel walk.
Panel fit and mounting
Three-pole construction in a 105 mm wide by 181 mm tall by 86 mm deep footprint (–). The IP40 front protection suits indoor switchboard installation; the breaker mounts via the standard SENTRON 3VA2 baseplate or direct screw fixing. Insulation voltage is rated 800 V, adequate for 690 V line-to-line systems with margin. Power loss is 4 W maximum, low enough that ventilation spacing in a typical distribution panel is sufficient — no forced cooling required for this single unit.
Lifecycle and sourcing posture
The lifecycle stage is listed as current, meaning Siemens has not announced end-of-life or phase-out for this order code. It is sourced to order against an RFQ through independent distribution channels; availability and current pricing are confirmed at quote time.