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Siemens 5SY7301-8 — 3-Pole MCB (DIN Rail)

Siemens 5SY7301-8 SENTRON MCB, D-curve, 3-pole, 15/50 kA

MPN5SY7301-8
Active

Siemens SENTRON 5SY7301-8, 3-pole miniature circuit breaker, D tripping characteristic, 15 kA (EN 60898) / 50 kA (IEC 60947-2), 400 V AC, 3 MW units.

Siemens 5SY7301-8 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY7301-8 — Identification
ParameterValue
Brand nameSENTRON
Number of poles3
Pole configuration3P
Suitability for operationMechanical engineering / industry
5SY7301-8 — Protection
ParameterValue
Tripping characteristic (curve)D
Breaking capacity per EN 6089815 kA
Breaking capacity per IEC 60947-250 kA
Overvoltage categoryIII
IP protection classIP20, with connected conductors
Pollution degree3
5SY7301-8 — 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)1.1 W
Mechanical service life (operating cycles, typ.)10 000
Neutral conductor switchingNo
Rated voltage (AC, single-phase)440 V
5SY7301-8 — 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
5SY7301-8 — 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 5SY7301-8 — D-curve MCB for high-inrush loads

For a panel builder, that means fewer callbacks for false trips on compressor or conveyor feeds. Rated breaking capacity spans three standards: 15 kA at 400 V AC per EN 60898-1 (household / commercial), 50 kA at 400 V AC per IEC 60947-2 (industrial), and 5 kA per UL 1077 / CSA C22.2 No.235 for North American supplementary protection. The 50 kA industrial rating gives selectivity headroom downstream of a larger feeder breaker — useful in a machine control panel where fault currents can hit that level.

At 3 MW wide (54 mm), it fits standard enclosure cutouts.

Environmental and compliance specs

Ambient operating range from -40 °C to 75 °C, with humidity derating above 55 °C (max 95% RH at 55 °C, tapering to 35% at 75 °C). Vibration tested per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.

Frequently asked questions

What is the 5SY7301-8 used for?

It is a 3-pole D-curve miniature circuit breaker for protecting circuits with high inrush currents — motor starters, transformers, welding equipment — in industrial control panels and distribution boards.

What breaking capacity does the 5SY7301-8 have?

15 kA per EN 60898-1 at 400 V AC, 50 kA per IEC 60947-2 at 400 V AC, and 5 kA per UL 1077 / CSA C22.2 No.235.

What compliance documentation is available for the 5SY7301-8?

The breaker is certified to IEC / EN 60898-1, IEC / EN 60947-2, and UL 1077 / CSA C22.2 No.235. It is halogen-free and silicon-free, meeting typical RoHS/REACH requirements for industrial equipment.

Where can I buy the 5SY7301-8?

The 5SY7301-8 is sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time.

MPN
5SY7301-8