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Siemens 5SY7405-8CC — 4-Pole MCB (DIN Rail)

Siemens 5SY7405-8CC SENTRON MCB, 4P D 0.5 A, 50 kA

MPN5SY7405-8CC

Siemens SENTRON 5SY7405-8CC, miniature circuit breaker, 4-pole, D tripping characteristic, 0.5 A rated current, 400 V AC, 50 kA breaking capacity per IEC 60947-2.

Siemens 5SY7405-8CC datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY7405-8CC — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY7405-8CC — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated voltage, AC (multi-phase)440 V
5SY7405-8CC — Protection
ParameterValue
Tripping characteristic (trip curve)D
Overvoltage categoryIII
Pollution degree3
Degree of protection (IP)IP20, with connected conductors
5SY7405-8CC — 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
5SY7405-8CC — 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
5SY7405-8CC — Performance
ParameterValue
Power loss per pole, AC (hot state, at In)1.1 W

Product details

The Siemens 5SY7405-8CC is a SENTRON miniature circuit breaker (MCB) with a D tripping characteristic, 4 poles, rated 0.5 A at 400 V AC.

Installation depth is 70 mm. Mount in any position.

Halogen-free and silicon-free (–), suitable for clean-room or sensitive electronics environments. Humidity tolerance: max 95% at 55 °C, derating to 35% at 75 °C. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz. Mechanical life 10,000 operating cycles typical. Accepts supplementary devices for alarm or shunt-trip functions.

Frequently asked questions

Where can I buy 5SY7405-8CC and get a price?

Sourced to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time.

What is the depth of 5SY7405-8CC?

76 mm. Installation depth is 70 mm.

What is the width of 5SY7405-8CC?

72 mm, which corresponds to 4 modular width units.

Will 5SY7405-8CC drop into a panel specified around 5SY4304-7CV without rewiring?

Both are 4-pole MCBs on standard DIN rail, so the mechanical fit is the same. However, 5SY4304-7CV is a different series with different breaking capacity and characteristic — verify the electrical ratings (current, curve, interrupting capacity) against your panel design before substituting.

What compliance documentation does Siemens provide for 5SY7405-8CC?

The part carries a 50 kA breaking capacity rating per IEC 60947-2 and a 5 kA rating per UL 1077 / CSA C22.2 No.235. It is halogen-free and silicon-free (–). Standard Siemens documentation includes CE declaration, RoHS, and REACH compliance data.

MPN
5SY7405-8CC