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Siemens 5SY4425-6 — 4-Pole MCB (DIN Rail)

Siemens 5SY4425-6 SENTRON 4-Pole MCB, 25 A B-Curve

MPN5SY4425-6
Active

Siemens SENTRON 5SY4425-6, 4-pole miniature circuit breaker, 25 A rated current, B tripping characteristic, 10 kA (EN 60898) / 20 kA (IEC 60947-2) breaking capacity, 4 MW DIN rail mount.

$41.91Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

5SY4425-6 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY4425-6 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated current (In), AC25 A
Rated voltage, AC (multi-phase)440 V
Rated voltage, AC (single-phase)440 V
Voltage typeAC
5SY4425-6 — Protection
ParameterValue
Tripping characteristic (trip curve)B
Rated breaking capacity (Icn), per EN 6089810 kA
Rated breaking capacity, per IEC 60947-220 kA
Breaking capacity, AC (UL 1077 / CSA C22.2 No.235)5 kA
Energy limitation class3
Overvoltage categoryIII
Pollution degree3
Degree of protection (IP)IP20, with connected conductors
Neutral conductor switchingNo
Touch protectionYes
5SY4425-6 — 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
5SY4425-6 — 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

Product details

25 A B-curve 4-pole — the selectivity anchor

The 4-pole construction (4P) switches all three phases plus the neutral in a single unit, which simplifies panel wiring and ensures full disconnection on a fault.

DIN-rail fit and temperature derating

Rated current is 25 A at 35 °C ambient. Above that, derate: 23.5 A at 45 °C, 22.98 A at 50 °C, 22.45 A at 55 °C, and 21.9 A at 60 °C. In a sealed panel running at 50 °C, you lose about 8 % of the nominal rating — budget the load accordingly. The surrounding temperature influence curve also caps humidity: 95 % RH up to 55 °C, then 55 % RH up to 70 °C, then 35 % RH up to 75 °C maximum.

Active production, sourced per RFQ

Approvals are implicit in the EN 60898 and IEC 60947-2 ratings — this MCB carries the CE mark for the European low-voltage directive.

Frequently asked questions

Is the 5SY4425-6 a 4-pole circuit breaker?

Yes, it is a 4-pole (4P) miniature circuit breaker, switching all three phases and the neutral. It occupies 4 modular width units on a DIN rail.

Can the 5SY4425-6 be used for DC applications?

The rated voltage type is AC only — no DC rating is listed. For DC circuits, select an MCB with a DC-rated breaking capacity.

MPN
5SY4425-6