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Siemens 5SY5405-7 — 4-Pole MCB (DIN Rail)

Siemens 5SY5405-7 SENTRON MCB, 4P C-curve 0.5A 10kA

MPN5SY5405-7
Active

Siemens SENTRON 5SY5405-7 miniature circuit breaker, 4-pole, C tripping characteristic, 0.5 A rated current, 10 kA breaking capacity AC/DC, 4 MW units.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY5405-7 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityuniversal current
5SY5405-7 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated current (In), AC0.5 A
Rated voltage, AC (multi-phase)440 V
Rated voltage, AC (single-phase)440 V
Voltage typeAC/DC
5SY5405-7 — Protection
ParameterValue
Tripping characteristic (trip curve)C
Rated breaking capacity (Icn), per EN 6089810 kA
Energy limitation class3
Overvoltage categoryII
Pollution degree2
Degree of protection (IP)IP20, with connected conductors
Neutral conductor switchingNo
Touch protectionYes
5SY5405-7 — 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
5SY5405-7 — 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
5SY5405-7 — Performance
ParameterValue
Mechanical service life (switching cycles, typ.)10 000

Product details

Breaking capacity is 10 kA per EN 60898 on AC and 10 kA per EN 60898-2 on DC up to 880 V. The DC polarity must be observed (AC supply is polarity-independent). Rated for universal current (AC/DC), so it works on both supply types without swapping the internal mechanism. Overvoltage category II and pollution degree 2 suit it for fixed-installation distribution panels in clean indoor environments.

Temperature derating — the number that matters for dense panels

At 40 °C ambient the 0.5 A rating derates to 0.48 A; at 50 °C it drops to 0.45 A; at 60 °C it is 0.42 A. In a tightly packed DIN-rail enclosure, internal temperature can reach 50–60 °C.

IP20 with connected conductors — not rated for washdown, but fine inside a sealed enclosure.

Listed as current production (active lifecycle stage). No PCN or end-of-life notice.

MPN
5SY5405-7