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Siemens 5SY7401-7 — 4-Pole MCB (DIN Rail)

Siemens 5SY7401-7 SENTRON MCB, 4P C-Curve, 15kA IEC/EN 60898

MPN5SY7401-7
Active

Siemens SENTRON 5SY7401-7, 4-pole miniature circuit breaker, C characteristic, 15 kA per IEC/EN 60898-1, 50 kA per IEC 60947-2, 400 V AC, 4 MW.

Siemens 5SY7401-7 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY7401-7 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY7401-7 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated voltage, AC (multi-phase)440 V
5SY7401-7 — Protection
ParameterValue
Tripping characteristic (trip curve)C
Energy limitation class3
Overvoltage categoryIII
Pollution degree3
Degree of protection (IP)IP20, with connected conductors
5SY7401-7 — 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
5SY7401-7 — 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
5SY7401-7 — Performance
ParameterValue
Power loss per pole, AC (hot state, at In)1.2 W

Product details

What this MCB covers

The Siemens 5SY7401-7 is a 4-pole SENTRON miniature circuit breaker with a C-trip curve, rated 15 kA breaking capacity under IEC/EN 60898-1 and 50 kA under IEC 60947-2. It also carries a UL 1077 listing at 5 kA (AC). That dual-standard coverage means it fits both European panel builds (IEC 60898-1 for domestic/commercial, IEC 60947-2 for industrial) and North American supplementary-protection applications — one part number for a mixed-spec BOM. If your line sees high inrush from drives or welders, you'd want a D curve; for purely resistive loads, a B curve. This one splits the difference for general industrial and mechanical-engineering duty.

Four modular-width units (4 MW, 72 mm wide) on a DIN rail — snap-on quick-assembly system. Mounting position any orientation. The sealable design lets you lock the toggle position after commissioning — useful for a panel that must stay in a known state during maintenance.

At DC, it breaks 15 kA at 60 V and max operating voltage 72 V.

Frequently asked questions

Will 5SY7401-7 drop into a panel specified around 5SY4304-7CV?

Both are 4-pole SENTRON MCBs on a 4 MW DIN-rail footprint, so the mechanical fit is the same. The difference is in the trip curve and breaking capacity — the 5SY7401-7 is a C-curve with higher interrupting ratings (15/50 kA vs the 5SY4304-7CV's lower values). Verify the downstream coordination study before swapping; the physical swap is straightforward.

MPN
5SY7401-7