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Siemens 5SY4363-6KK11 — 3-Pole MCB (DIN Rail)

Siemens 5SY4363-6KK11 SENTRON MCB, 63 A, 3P, B Curve

MPN5SY4363-6KK11

Siemens SENTRON 5SY4363-6KK11, miniature circuit breaker, 3-pole, 63 A, B characteristic, 10 kA per EN 60898, 15 kA per IEC 60947-2, 54 x 90 x 76 mm (WxHxD).

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

5SY4363-6KK11 — Identification
ParameterValue
Brand nameSENTRON
Number of poles3
Pole configuration3P
Suitability for operationMechanical engineering / industry
5SY4363-6KK11 — Protection
ParameterValue
Tripping characteristic (curve)B
Breaking capacity per EN 6089810 kA
Breaking capacity per IEC 60947-215 kA
Overvoltage categoryIII
IP protection classIP20, with connected conductors
Energy limitation class3
Pollution degree3
5SY4363-6KK11 — Electrical
ParameterValue
Rated voltage (AC, multi-phase)440 V
Voltage type (AC/DC)AC
Supply frequency range50/60 Hz
Power loss per pole at rated current (AC, hot)6 W
Mechanical service life (operating cycles, typ.)10 000
Neutral conductor switchingNo
Rated voltage (AC, single-phase)440 V
5SY4363-6KK11 — Mechanical
ParameterValue
Modular width units3
Mounting positionany
Width54 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Terminal tightening torque, max.75 °C
Terminal tightening torque, min.-40 °C
Combined terminal, topYes
Combined terminal, bottomYes
Fastening methodQuick assembly system
SealableYes
Accepts supplementary devicesYes
5SY4363-6KK11 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of surrounding temperaturemax. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C
Vibration resistance (IEC 60068-2-6)±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz

Product details

Siemens SENTRON 5SY4363-6KK11 — 63 A, 3-Pole, B-Curve MCB

The Siemens 5SY4363-6KK11 is a 3-pole miniature circuit breaker from the SENTRON 5SY series, rated 63 A at AC with a B tripping characteristic. The breaker is certified to DIN EN60898-1 with a 10 kA breaking capacity and to IEC 60947-2 with a 15 kA rating, making it suitable for both residential and industrial branch-circuit protection.

Any mounting position is permitted. The IP20 rating applies with conductors connected, so it is intended for use inside a closed enclosure.

Frequently asked questions

Where can I buy 5SY4363-6KK11 and how do I get a price?

The part is sourced to order through independent distribution. Submit an RFQ for current availability and pricing; the quote will reflect the market at that time.

What is the closest functional alternative to 5SY4363-6KK11?

The 5SY6332-7CC is a 3-pole, 63 A, C-curve MCB from the same SENTRON family. The key difference is the tripping characteristic: B-curve (3–5× In) on the 5SY4363-6KK11 versus C-curve (5–10× In) on the 5SY6332-7CC. The C-curve is better suited for moderate inrush loads like small motors or transformers. Both share the same 54 mm width, DIN-rail mount, and 10/15 kA breaking capacities, so a swap is mechanically possible but the protection coordination must be rechecked.

What is 5SY4363-6KK11's listed depth?

The overall depth is 76 mm; the installation depth behind the panel face is 70 mm.

What is 5SY4363-6KK11's listed width?

The width is 54 mm, which corresponds to 3 modular width units on a standard DIN-rail grid.

Will 5SY4363-6KK11 drop into a panel specified around 5SY6332-7CC without rewiring?

Mechanically yes — both are 3-pole, 54 mm wide, DIN-rail mounted breakers with the same terminal arrangement. However, the tripping characteristic differs (B vs C curve), so the protective coordination must be verified. If the downstream loads have moderate inrush, the B-curve may nuisance-trip where the C-curve would hold.

What compliance documentation does Siemens provide for 5SY4363-6KK11?

The breaker is certified to DIN EN60898-1 and IEC 60947-2. It is halogen-free and silicon-free. The product designation and standard references are on the nameplate. Full test certificates and declaration of performance are available through Siemens Industry Online Support.

MPN
5SY4363-6KK11