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Siemens 5SY7401-8 — 4-Pole MCB (DIN Rail)

Siemens 5SY7401-8 SENTRON MCB, 4P D 1A, 15/50 kA

MPN5SY7401-8
Active

Siemens SENTRON 5SY7401-8, 4-pole miniature circuit breaker, D tripping characteristic, 1 A rated current, 400 V AC, 15 kA (EN 60898) / 50 kA (IEC 60947-2), IP20, quick-assembly system.

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

Specifications

5SY7401-8 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY7401-8 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated current (In), AC400 V
Rated voltage, AC (multi-phase)440 V
Rated voltage, AC (single-phase)440 V
Voltage typeAC
5SY7401-8 — Protection
ParameterValue
Tripping characteristic (trip curve)D
Rated breaking capacity (Icn), per EN 6089815 kA
Rated breaking capacity, per IEC 60947-250 kA
Breaking capacity, AC (UL 1077 / CSA C22.2 No.235)5 kA
Overvoltage categoryIII
Pollution degree3
Degree of protection (IP)IP20, with connected conductors
Neutral conductor switchingNo
Touch protectionYes
5SY7401-8 — 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
5SY7401-8 — 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
5SY7401-8 — Performance
ParameterValue
Mechanical service life (switching cycles, typ.)10 000

Product details

The D-curve holds through the surge and clears on sustained overload or short circuit.

Approvals include UL 1077 and CSA C22.2 No. 235 (5 kA), plus CE and UKCA marking per the SENTRON family. RoHS and REACH declarations are standard with the brand. The degree of pollution 3 and overvoltage category III ratings confirm it's suited for industrial control panels, not just residential.

Environmental and handling specs

Ambient temperature range is -40 °C to 75 °C, with derating for humidity: max 95% RH at 55 °C, tapering to 35% RH at 75 °C. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz. Halogen-free and silicon-free construction — no outgassing concerns in sealed enclosures or near sensitive optics. Sealable terminals (top and bottom combined) and touch protection built in. Neutral conductor switching is not provided — this is a 4-pole breaker with all poles switched, but no dedicated neutral pole.

MPN
5SY7401-8