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Siemens 5SY4325-6 — 3-Pole MCB (DIN Rail)

Siemens 5SY4325-6 SENTRON MCB, 3P B-Curve 10kA IEC, 20kA IEC

MPN5SY4325-6
Active

Siemens SENTRON 5SY4325-6, 3-pole miniature circuit breaker, B characteristic, 10 kA (EN 60898) / 20 kA (IEC 60947-2) at 400 V AC.

$31.75Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

5SY4325-6 — Identification
ParameterValue
Brand nameSENTRON
Number of poles3
Pole configuration3P
Suitability for operationMechanical engineering / industry
5SY4325-6 — Protection
ParameterValue
Tripping characteristic (curve)B
Breaking capacity per EN 6089810 kA
Breaking capacity per IEC 60947-220 kA
Overvoltage categoryIII
IP protection classIP20, with connected conductors
Energy limitation class3
Pollution degree3
5SY4325-6 — Electrical
ParameterValue
Rated voltage (AC, multi-phase)440 V
Voltage type (AC/DC)AC
Supply frequency range50/60 Hz
Power loss per pole at rated current (AC, hot)2.4 W
Mechanical service life (operating cycles, typ.)10 000
Neutral conductor switchingNo
Rated voltage (AC, single-phase)440 V
5SY4325-6 — Mechanical
ParameterValue
Modular width units3
Mounting positionany
Width54 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Terminal tightening torque, max.75 °C
Terminal tightening torque, min.-40 °C
Combined terminal, topYes
Combined terminal, bottomYes
Fastening methodQuick assembly system
SealableYes
Accepts supplementary devicesYes
5SY4325-6 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of surrounding temperaturemax. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C
Vibration resistance (IEC 60068-2-6)±1mm at 5 to 25Hz; 50m/s² at 25 to 150Hz

Product details

The 400 V AC rated operational voltage covers the common 230/400 V three-phase system; the 440 V single-phase rating handles line-to-line feeds on 277/480 V panels. Any mounting position is permitted, and the IP20 enclosure (with connected conductors) suits enclosed panel environments. The -40 to +75 °C operating range covers unheated enclosures and high-ambient machine cabinets alike.

Integration note — footprint and selectivity

The B curve, combined with the 20 kA breaking capacity under IEC 60947-2, gives headroom for selective coordination with downstream branch MCBs — the energy limitation class 3 limits let-through energy, reducing arc-flash risk on the bus.

Frequently asked questions

What is the breaking capacity of 5SY4325-6?

10 kA per EN 60898-1 and 20 kA per IEC 60947-2 at 400 V AC. Under UL 1077 it is rated 5 kA.

Where can I buy 5SY4325-6?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

Will 5SY4325-6 drop into a panel specified around 5SY4304-7CV?

Both are 3-pole SENTRON MCBs with the same DIN-rail footprint (3 MW, 54 mm wide). The 5SY4325-6 uses a B curve; the 5SY4304-7CV uses a C curve. If the panel was wired for a C-curve device, swapping to B may cause nuisance tripping on loads with higher inrush — verify the load type before substitution.

MPN
5SY4325-6