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Siemens 5SY7403-7CC — 4-Pole MCB (DIN Rail)

Siemens 5SY7403-7CC SENTRON MCB, 4P C-3A, 30kA IEC

MPN5SY7403-7CC

Siemens SENTRON miniature circuit breaker, 5SY7403-7CC, 4-pole, C-tripping characteristic, 3 A rated current, 30 kA breaking capacity per IEC 60947-2, IP20.

Siemens 5SY7403-7CC datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY7403-7CC — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY7403-7CC — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated current (In), AC3 A
Rated voltage, AC (multi-phase)440 V
Rated voltage, AC (single-phase)440 V
Voltage typeAC
5SY7403-7CC — Protection
ParameterValue
Tripping characteristic (trip curve)C
Rated breaking capacity, per IEC 60947-230 kA
Breaking capacity, AC (UL 1077 / CSA C22.2 No.235)5 kA
Overvoltage categoryIII
Pollution degree3
Degree of protection (IP)IP20, with connected conductors
Neutral conductor switchingNo
Touch protectionYes
5SY7403-7CC — 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
5SY7403-7CC — 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
5SY7403-7CC — Performance
ParameterValue
Mechanical service life (switching cycles, typ.)10 000

Product details

The Siemens 5SY7403-7CC is a SENTRON miniature circuit breaker, 4-pole, C-curve, rated 3 A at 50/60 Hz AC. It carries a 30 kA breaking capacity per IEC 60947-2, with a 5 kA rating per UL 1077 and CSA C22.2 No.235. Finger-safe touch protection is built in.

Temperature Derating

Above that, derate linearly: 2.84 A at 40 °C, 2.75 A at 45 °C, 2.66 A at 50 °C, 2.56 A at 55 °C. If the panel runs hot, size the breaker for the actual load current at your ambient, not the 40 °C nameplate.

Compliance & Approvals

Halogen-free and silicon-free construction. Sealable for lockout/tagout. Vibration resistance tested per IEC 60068-2-6: ±1 mm at 5 to 25 Hz, 50 m/s² at 25 to 150 Hz.

Frequently asked questions

What is the breaking capacity of 5SY7403-7CC?

30 kA per IEC 60947-2, and 5 kA per UL 1077 and CSA C22.2 No.235. The IEC rating covers industrial fault levels; the UL/CSA rating applies to North American branch-circuit applications.

What is the temperature derating for 5SY7403-7CC above 40 °C?

At 45 °C rated current drops to 2.75 A, at 50 °C to 2.66 A, and at 55 °C to 2.56 A. Size the breaker for the actual load at your panel ambient.

Where can I buy 5SY7403-7CC?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
5SY7403-7CC