What this MCCB carries — and what that means in the panel
The Siemens 3VA2163-8KP46-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 63 A continuous current across the full temperature range from 40 °C to 70 °C — no derating needed up to that ceiling. Four poles, so it switches all three phases plus neutral in a single compact package. The ETU850 electronic trip unit gives you adjustable overload and short-circuit protection curves, plus a communication function for remote monitoring or integration into a plant-wide power management system. The interrupting ratings are the headline here: 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and still 53 kA at 690 V. That means this breaker can clear a fault on a high-capacity transformer secondary or a large motor starter lineup without needing upstream current-limiting fuses — it's sized for high-fault installations where a standard MCCB would weld shut. Dimensions are 140 mm wide, 181 mm high, 86 mm deep — a standard 4-pole MCCB footprint that fits SENTRON panelboards and switchgear cubicles. The IP40 front protection keeps dust and tools out of the mechanism in a clean indoor panel environment.
Lifecycle and sourcing — still a current-production part
The lifecycle stage is marked as current — this is not an obsolete or NRND part. Siemens continues to manufacture the 3VA2 series as their main MCCB line for commercial and industrial distribution. The 3VA2163-8KP46-0AA0 is sourced to order through independent distribution; pricing and availability are confirmed at quote time against an RFQ.
Panel fit and integration notes
Mounts into a standard SENTRON panelboard or a DIN-rail adapter kit. The 86 mm depth leaves clearance for rear-connected busbars. Rated insulation voltage is 800 V.
Trip unit detail — ETU850
The ETU850 electronic trip unit provides adjustable long-time pickup and delay (tr min. 0.5 s, tr max. 25 s), plus short-time and instantaneous protection. The N-conductor protection is adjustable from OFF to 40% up to 160% of the phase current — useful for sizing the neutral on a 4-wire system with harmonic loads. Ground fault monitoring is not included on this version; if you need GF protection, look at the -8KP46 variants with a different suffix.