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Siemens 5SY4663-8CC — 4-Pole MCB (DIN Rail)

Siemens 5SY4663-8CC SENTRON MCB, 63A D-curve, 4-pole, 10kA

MPN5SY4663-8CC

Siemens SENTRON 5SY4663-8CC, miniature circuit breaker, 3P+N, D characteristic, 63 A, 400 V AC, 10 kA per EN 60898, 4 MW units.

Siemens 5SY4663-8CC datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY4663-8CC — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY4663-8CC — Ratings
ParameterValue
Number of poles4
Pole configuration3P+N
Rated voltage, AC (multi-phase)440 V
5SY4663-8CC — Protection
ParameterValue
Tripping characteristic (trip curve)D
Overvoltage categoryIII
Pollution degree3
Degree of protection (IP)IP20, with connected conductors
5SY4663-8CC — Mechanical
ParameterValue
Width in modular units4
Width72 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Fastening / mounting methodQuick assembly system
Mounting positionany
Combined terminal, topYes
Combined terminal, bottomYes
Tightening torque, max.75 °C
Tightening torque, min.-40 °C
SealableYes
5SY4663-8CC — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of ambient temperature (derating)max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C
5SY4663-8CC — Performance
ParameterValue
Power loss per pole, AC (hot state, at In)4.9 W

Product details

The Siemens 5SY4663-8CC is a SENTRON miniature circuit breaker (MCB) rated 63 A with a D tripping characteristic, 4-pole configuration (3P+N), and a 10 kA breaking capacity per EN 60898 at 400 V AC.

Mounting, environment, and panel integration

Ambient operating range is -40 °C to 75 °C, but the thermal trip derates above 55 °C per the humidity/temperature influence table: max 95% RH at 55 °C, dropping to 35% RH at 75 °C. If the panel runs hot, factor that into the effective current rating.

Key electrical and mechanical parameters

Rated operational voltage is 400 V AC (440 V max for both single-phase and multi-phase operation). Frequency range is 50/60 Hz. Power loss per pole at rated current in hot state is 4.9 W — for a 4-pole breaker that's 19.6 W total heat to dissipate inside the enclosure; factor that into your thermal budget. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.

Frequently asked questions

How do I get current pricing and availability for 5SY4663-8CC?

Submit an RFQ through this listing. The part is sourced to order through independent distribution; availability and current pricing are confirmed at quote time.

What is the breaking capacity of the 5SY4663-8CC?

10 kA per EN 60898 at 400 V AC. That is the rated short-circuit capacity for this MCB under the standard's test conditions.

What compliance documentation does Siemens provide for the 5SY4663-8CC?

The breaker is halogen-free and silicon-free. Standard Siemens MCB documentation includes CE declaration of conformity and material declarations; specific RoHS/REACH certificates are available from Siemens Industry Support upon request.

Will the 5SY4663-8CC drop into a panel specified around a 5SY4304-7CV?

Both are 4-pole SENTRON MCBs on the same DIN-rail footprint with the same modular width per pole. The 5SY4663-8CC is a 63 A D-curve; the 5SY4304-7CV is a different rating and characteristic. Physical fit is the same, but verify the electrical ratings match your circuit requirements before substituting.

MPN
5SY4663-8CC