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Siemens 5SY4403-7 — 4-Pole MCB (DIN Rail)

Siemens SENTRON 5SY4403-7 4P C-Curve MCB, 10kA/35kA

MPN5SY4403-7
Active

Siemens SENTRON 5SY4403-7, 4-pole C-curve MCB, 400 V AC, 10 kA (EN 60898) / 35 kA (IEC 60947-2), -40 to 75 °C.

$344.94Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

5SY4403-7 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY4403-7 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated voltage, AC (multi-phase)440 V
5SY4403-7 — Protection
ParameterValue
Tripping characteristic (trip curve)C
Energy limitation class3
Overvoltage categoryIII
Pollution degree3
Degree of protection (IP)IP20, with connected conductors
5SY4403-7 — 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
5SY4403-7 — 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
5SY4403-7 — Performance
ParameterValue
Power loss per pole, AC (hot state, at In)1.3 W

Product details

The 5SY4403-7: Handles -40 to 75 °C ambient. IP20 with conductors connected.

Compliance and build notes

Compliance covers IEC/EN 60898-1, IEC/EN 60947-2, and UL1077. Halogen-free and silicon-free construction. That nameplate carries real certification paperwork, not just a marketing stamp. Energy limitation class 3. Sealable — good for revenue-meter applications or panel lockout procedures.

Mounts in any position. Quick-assembly system for DIN rail. Top and bottom combined terminals. Neutral conductor switching is not separate — the 4-pole design handles all four poles, so verify your neutral switching requirement. Power feed position is arbitrary; no preferred side.

Frequently asked questions

What compliance documentation does this part carry?

It complies with IEC/EN 60898-1, IEC/EN 60947-2, and UL1077. It is halogen-free and silicon-free. Rated for overvoltage category III, pollution degree 3.

What is the depth and width of the 5SY4403-7?

Depth 76 mm, width 72 mm (4 modular units), height 90 mm.

MPN
5SY4403-7