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Siemens 5SL4663-8 — 4-Pole MCB (DIN Rail)

Siemens 5SL4663-8 SENTRON MCB, 63 A D-curve, 4-pole, 10 kA

MPN5SL4663-8
Active

Siemens SENTRON 5SL4663-8 miniature circuit breaker, 3P+N, D-curve, 63 A, 400 V AC, 10 kA breaking capacity per IEC 60947-2, 4 MW wide.

Siemens 5SL4663-8 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL4663-8 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityResidential buildings/infrastructure
5SL4663-8 — Ratings
ParameterValue
Number of poles4
Pole configuration3P+N
Rated voltage, AC (multi-phase)440 V
5SL4663-8 — Protection
ParameterValue
Tripping characteristic (trip curve)D
Energy limitation class3
Overvoltage categoryIII
Pollution degree2
Degree of protection (IP)IP20, with connected conductors
5SL4663-8 — Mechanical
ParameterValue
Width in modular units4
Width72 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Tightening torque, max.75 °C
Tightening torque, min.-40 °C
SealableYes
5SL4663-8 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
5SL4663-8 — Performance
ParameterValue
Power loss per pole, AC (hot state, at In)5 W

Product details

63 A D-curve MCB for high-inrush loads

The Siemens 5SL4663-8 is a SENTRON miniature circuit breaker rated 63 A with a D tripping characteristic, 3P+N (4-pole) construction, and a 400 V AC supply voltage. The 10 kA breaking capacity is certified to both EN 60898 and IEC 60947-2, meaning it can safely interrupt faults up to 10 kA at 400 V AC without cascading upstream. At 72 mm wide (4 modular width units), this breaker occupies four standard DIN-rail slots.

Sealable design allows lockout/tagout. Halogen-free and silicon-free construction meets material compliance requirements for infrastructure projects. The breaker is rated for DC circuits up to 72 V maximum.

Frequently asked questions

Will 5SL4663-8 drop into a panel specified around 5SL4363-7 without rewiring?

No — the 5SL4663-8 is 4-pole (3P+N) at 72 mm wide (4 MW), while the 5SL4363-7 is 3-pole at 54 mm wide (3 MW). The extra pole and wider footprint require a different DIN-rail allocation and additional neutral conductor termination. Rewiring is needed.

MPN
5SL4663-8