What the ratings mean for fit
The Siemens SENTRON 3VA2163-5HM46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 63 A continuous current — that is the load it carries without tripping under normal conditions, not a short-circuit rating. The interrupting capacity tells you where it can be installed safely: 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. Those numbers govern the available fault current the breaker can clear without welding contacts or rupturing the case. If your panel's fault current at 415 V is 100 kA, this breaker has headroom; if it's 130 kA, you need a higher-rated device upstream. Rated current holds flat at 63 A from 40 °C through 70 °C ambient — no derating curve to calculate in a warm enclosure. The initial trip threshold is 16 A, meaning the thermal-magnetic element starts its characteristic bend at that level, not that the breaker holds 16 A steady. Full-scale trip is 63 A. Ground-fault monitoring is built in via summation current formation on L + N conductors, so it detects leakage without a separate module. Rated insulation voltage is 800 V, which sets the voltage stress the internal clearances and creepage distances are designed for. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The 4 W maximum power loss matters for thermal budgeting inside a sealed enclosure — four breakers on a bus run 16 W of heat that must be vented or conducted out.
Deployment context
This MCCB is designed for line protection in distribution panels — it sits upstream of branch circuits, not downstream as a motor-protective device. The 4-pole configuration suits three-phase-plus-neutral systems (TN-S, TN-C-S) where the neutral must be switched and protected. Dimensions are 140 mm wide, 181 mm high, 86 mm deep — a standard SENTRON 3VA frame that fits Siemens' own panelboard mounting systems and most DIN-rail adapter plates. No communication function, no undervoltage release, no trip indicator: this is a basic thermal-magnetic breaker with ground-fault summation, specified for panels where remote monitoring and shunt-trip are not required.
Lifecycle and sourcing reality
The lifecycle stage is listed as current — meaning Siemens still manufactures this order code as an active catalog item. No end-of-life notice or last-time-buy date is on record. For a BOM freeze or a panel that must stay serviceable for years, this is the straightforward choice: same code, same specs, same mounting footprint as the original build. The part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.