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Siemens 5SL6640-7MB — 4-Pole MCB (DIN Rail)

Siemens 5SL6640-7MB SENTRON MCB, 3P+N, 40A, C-Curve, 6kA

MPN5SL6640-7MB
Active

Siemens SENTRON 5SL6640-7MB, miniature circuit breaker, 3P+N, 400 V AC, 40 A, C characteristic, 6 kA breaking capacity per EN 60898, 4-module width.

Siemens 5SL6640-7MB datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL6640-7MB — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityResidential buildings/infrastructure
5SL6640-7MB — Ratings
ParameterValue
Number of poles4
Pole configuration3P+N
Rated voltage, AC (multi-phase)440 V
5SL6640-7MB — Protection
ParameterValue
Tripping characteristic (trip curve)C
Energy limitation class3
Overvoltage categoryIII
Pollution degree2
Degree of protection (IP)IP20, with connected conductors
5SL6640-7MB — 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
5SL6640-7MB — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
5SL6640-7MB — Performance
ParameterValue
Power loss per pole, AC (hot state, at In)3.3 W

Product details

The part carries a typical mechanical service life of 20,000 operating cycles, which is double the 10,000 cycles specified on the 3-pole 5SL4363-7 sibling. This reflects the additional wear margin on the switched neutral pole in the 3P+N design.

Halogen-free and silicon-free construction per the spec, which matters for panels in clean-room or high-reliability environments where outgassing can contaminate contacts or optics.

Electrical ratings

Power loss per pole is 3.3 W at rated current in hot operating state, giving a total of 13.2 W for the 4-pole assembly. This should be factored into the enclosure thermal budget, especially when breakers are ganged in a multi-way board.

Frequently asked questions

How do I get current pricing and availability for the 5SL6640-7MB?

Pricing and availability are confirmed at quote time. Submit an RFQ through the storefront; the sourcing desk will return current pricing and lead time for your quantity.

Will the 5SL6640-7MB drop into a panel specified around the 5SL4363-7 without rewiring?

No. The 5SL6640-7MB is a 3P+N (4-pole) breaker occupying 4 modular width units (72 mm), while the 5SL4363-7 is a 3-pole breaker at 3 units (54 mm). The 18 mm width difference means the DIN rail position shifts and the neutral conductor must be routed through the fourth pole. The 5SL4363-7 also carries a 10 kA breaking capacity versus 6 kA on the 5SL6640-7MB, so a fault-current coordination check is needed before substitution.

What compliance documentation does Siemens provide for the 5SL6640-7MB?

The 5SL6640-7MB is designed to EN 60898 and IEC 60947-2, with a 6 kA breaking capacity certified under both standards. The SENTRON series typically carries CE marking and is RoHS-compliant. Specific declarations (UL, CSA, EAC) should be verified against the factory certificate for the target jurisdiction.

MPN
5SL6640-7MB