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Siemens 5SL6425-6 — 4-Pole MCB (DIN Rail)

Siemens 5SL6425-6 SENTRON MCB, 4P, B-Curve, 25A, 6kA

MPN5SL6425-6
Active

Siemens SENTRON 5SL6425-6, miniature circuit breaker, 4-pole, B-curve, 25 A, 6 kA breaking capacity per EN 60898 / IEC 60947-2, 400/440 V AC, 4 MW wide.

Siemens 5SL6425-6 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL6425-6 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityResidential buildings/infrastructure
5SL6425-6 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated voltage, AC (multi-phase)440 V
5SL6425-6 — Protection
ParameterValue
Tripping characteristic (trip curve)B
Energy limitation class3
Overvoltage categoryIII
Pollution degree2
Degree of protection (IP)IP20, with connected conductors
5SL6425-6 — Mechanical
ParameterValue
Width in modular units4
Width72 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Tightening torque, max.75 °C
Tightening torque, min.-40 °C
SealableYes
5SL6425-6 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
5SL6425-6 — Performance
ParameterValue
Power loss per pole, AC (hot state, at In)2.8 W

Product details

What this 4-pole B-curve MCB does in the panel

At 25 A per pole, it handles a 400 V three-phase feeder or a 230/400 V split-phase subfeed in a residential or light-commercial distribution board.

DIN-rail fit and panel integration

The 72 mm width (4 MW) occupies four 18 mm module spaces; plan your enclosure fill accordingly.

How it compares to the 3-pole C-curve sibling

The closest functional peer in the same SENTRON family is the 5SL4363-7 — a 3-pole, C-curve, 10 kA unit. The 5SL6425-6 is 4-pole and B-curve, so it won't drop into a panel wired for 5SL4363-7 without rewiring the neutral leg and checking the trip coordination. The 6 kA vs 10 kA breaking capacity means this unit is suited for lower fault-current installations; if your panel's prospective short-circuit current exceeds 6 kA, step up to the 10 kA sibling or a higher-rated SENTRON variant.

Frequently asked questions

Where can I buy 5SL6425-6 and get a price?

We source the 5SL6425-6 to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit a request and we'll return a firm quotation with lead time.

Will 5SL6425-6 drop into a panel specified for 5SL4363-7?

No — the 5SL6425-6 is 4-pole (72 mm wide) versus the 5SL4363-7's 3-pole (54 mm wide). It also carries a B-curve instead of C-curve and 6 kA instead of 10 kA breaking capacity. The panel would need rewiring for the neutral pole and a trip-coordination check before substitution.

What compliance documentation does Siemens provide for 5SL6425-6?

The 5SL6425-6 carries approvals per EN 60898 and IEC 60947-2, with a 6 kA rated breaking capacity under both standards. It is rated for overvoltage category III, pollution degree 2, and the SENTRON series typically includes CE, UKCA, and EAC declarations. Specific RoHS and REACH declarations are available from Siemens documentation.

MPN
5SL6425-6