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Siemens 5SY4308-7KK11 — 3-Pole MCB (DIN Rail)

Siemens 5SY4308-7KK11 SENTRON MCB, C-Curve 3P 10kA

MPN5SY4308-7KK11

Siemens SENTRON 5SY4308-7KK11 miniature circuit breaker, 3-pole, C-curve, 10 kA (EN 60898-1) / 20 kA (IEC 60947-2), 400 V AC, 3 modular width units.

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

Specifications

5SY4308-7KK11 — Identification
ParameterValue
Brand nameSENTRON
Number of poles3
Pole configuration3P
Suitability for operationMechanical engineering / industry
5SY4308-7KK11 — Protection
ParameterValue
Tripping characteristic (curve)C
Breaking capacity per EN 6089810 kA
Breaking capacity per IEC 60947-220 kA
Overvoltage categoryIII
IP protection classIP20, with connected conductors
Energy limitation class3
Pollution degree3
5SY4308-7KK11 — 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)0.9 W
Mechanical service life (operating cycles, typ.)10 000
Neutral conductor switchingNo
Rated voltage (AC, single-phase)440 V
5SY4308-7KK11 — 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
5SY4308-7KK11 — 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

The Siemens 5SY4308-7KK11 is a SENTRON 3-pole miniature circuit breaker with a C-curve trip characteristic, rated 10 kA breaking capacity per DIN EN60898-1 and 20 kA per IEC 60947-2 at 400 V AC. The 10 kA SCCR covers most secondary distribution scenarios; the 20 kA IEC 60947-2 rating gives headroom for higher-fault installations.

Snap-on mounting to DIN rail (quick assembly system per) in any position. Terminal design allows combined top/bottom feed, and the supply cord position is arbitrary. The -40 °C to +75 °C operating range covers unheated enclosures in cold climates and hot cabinet interiors near drives.

Compliance & Approvals

Designed for railway applications and mechanical engineering/industry. Complies with DIN EN60898-1 and IEC 60947-2. Sealable design allows lockout/tagout.

Frequently asked questions

Where can I buy 5SY4308-7KK11 and get a price?

This part is sourced to order through independent distribution channels. Submit an RFQ for current pricing and availability — confirmed at quote time, no stock-count promise.

What is the breaking capacity of 5SY4308-7KK11?

10 kA per DIN EN60898-1 and 20 kA per IEC 60947-2 at 400 V AC. For DC applications, the breaking capacity is 15 kA per IEC 60947-2 at 60 V DC (max 72 V DC).

Will 5SY4308-7KK11 fit a panel designed for 5SY4140-7?

Both are 3-module-width SENTRON MCBs on the same DIN-rail footprint, so mechanical fit is identical. The difference is the current rating — verify the load's ampacity against the 5SY4308-7KK11's rating before swapping.

MPN
5SY4308-7KK11