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Siemens 5SY6425-8 — 4-Pole MCB (DIN Rail)

Siemens 5SY6425-8 SENTRON MCB, 4P D 25A 6kA/15kA

MPN5SY6425-8

Siemens SENTRON 5SY6 series, miniature circuit breaker, 4-pole D-curve 25 A, 6 kA per EN 60898 / 15 kA per IEC 60947-2, 400 V AC, 72 mm wide (4 MW).

$567.14Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

5SY6425-8 — Identification
ParameterValue
Type / order code5SY6
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY6425-8 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated current (In), AC400 V
Rated voltage, AC (multi-phase)440 V
Rated voltage, AC (single-phase)440 V
Rated voltage, DC (max.)72 V
Voltage typeAC
Rated frequency50/60 Hz
5SY6425-8 — Protection
ParameterValue
Tripping characteristic (trip curve)D
Rated breaking capacity (Icn), per EN 608986 kA
Rated breaking capacity, per IEC 60947-215 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
5SY6425-8 — Mechanical
ParameterValue
Width in modular units4
Width72 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Combined terminal, topYes
Combined terminal, bottomYes
Tightening torque, max.75 °C
Tightening torque, min.-40 °C
SealableYes
5SY6425-8 — 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
5SY6425-8 — Performance
ParameterValue
Mechanical service life (switching cycles, typ.)10 000

Product details

Four poles (4P) switch all phases plus neutral, though the neutral is not switched separately.

At 72 mm wide (4 width units,), it occupies four 18 mm module spaces on the rail. Combined top and bottom terminals allow busbar feed-through without extra bridging.

Operating temperature range is -40 °C to 75 °C, with humidity derating above 55 °C: max 95% RH up to 55 °C, then 55% RH at 70 °C, then 35% RH at 75 °C. The breaker is sealable for tamper-proof installations. Overvoltage category III suits fixed-installation distribution panels.

Frequently asked questions

How do I get pricing and availability for 5SY6425-8?

Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through independent distribution channels — no stock count or price is published here.

What is the depth of 5SY6425-8?

Overall depth is 76 mm; installation depth behind the panel is 70 mm.

What is the width of 5SY6425-8?

72 mm wide, which is 4 standard width units (18 mm each) on a DIN rail.

What compliance documentation is available for 5SY6425-8?

The breaker carries ratings per EN 60898 (6 kA) and IEC 60947-2 (15 kA), plus UL 1077 / CSA C22.2 No. 235 (5 kA). It is halogen-free and silicon-free. Standard RoHS/REACH declarations are provided by Siemens for the SENTRON line.

MPN
5SY6425-8