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Siemens 5SY7401-8 — Miniature Circuit Breakers (MCB)

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.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

5SY7401-8 — Ratings
ParameterValue
Overvoltage categoryIII
5SY7401-8 — Mechanical
ParameterValue
Width72 mm
Height90 mm
Depth76 mm

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