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Siemens 5SY5408-7 — 4-Pole MCB (DIN Rail)

Siemens 5SY5408-7 SENTRON MCB, 4P C-Curve, 10kA, 400V AC

MPN5SY5408-7
Active

Siemens SENTRON 5SY5408-7, 4-pole miniature circuit breaker, C-curve, 10 kA breaking capacity per IEC/EN 60898-2, 400 V AC rated, 72 mm wide.

Siemens 5SY5408-7 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY5408-7 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityuniversal current
5SY5408-7 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated voltage, AC (multi-phase)440 V
5SY5408-7 — Protection
ParameterValue
Tripping characteristic (trip curve)C
Energy limitation class3
Overvoltage categoryII
Pollution degree2
Degree of protection (IP)IP20, with connected conductors
5SY5408-7 — 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
5SY5408-7 — 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
5SY5408-7 — Performance
ParameterValue
Power loss per pole, AC (hot state, at In)0.9 W

Product details

Rated 400 V AC (440 V max multi- or single-phase) and 880 V DC (1,000 V DC max), it handles a wide range of supply voltages.

IP20 with connected conductors — suitable for dry indoor panels, not washdown zones. Combined top and bottom terminals simplify daisy-chaining busbars. Neutral conductor is not switched (solid neutral bar passes through). Sealable design allows lockout/tagout. Halogen-free and silicon-free construction reduces outgassing in sensitive environments.

Rated for ambient temperatures from -40 °C to 75 °C, with humidity derating above 55 °C (95% RH up to 55 °C, 55% up to 70 °C, 35% at 75 °C). Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz. Pollution degree 2, overvoltage category II.

Frequently asked questions

What is the breaking capacity of 5SY5408-7?

10 kA per IEC/EN 60898-2 and 15 kA at DC per IEC 60947-2.

Where can I buy the 5SY5408-7?

The 5SY5408-7 is sourced and quoted to order through independent distribution. Submit an RFQ for current pricing and availability.

What is the closest functional second-source to 5SY5408-7?

The 5SY5416-7 is a higher-current sibling in the same SENTRON 5SY series, same 4-pole C-curve form factor. It will drop into the same DIN-rail footprint but check the amp rating against your branch-circuit load.

MPN
5SY5408-7