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Siemens 5SL6640-6 — 4-Pole MCB (DIN Rail)

Siemens 5SL6640-6 SENTRON MCB, 4P B-Char 40A 6kA

MPN5SL6640-6
Active

Siemens SENTRON 5SL6 series, miniature circuit breaker, 4-pole 3P+N, B-characteristic, 40 A rated current, 6 kA breaking capacity, 400 V AC.

Siemens 5SL6640-6 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL6640-6 — Identification
ParameterValue
Type / order code5SL6
Brand nameSENTRON
Application suitabilityResidential buildings/infrastructure
5SL6640-6 — Ratings
ParameterValue
Number of poles4
Pole configuration3P+N
Rated current (In), AC40 A
Rated voltage, AC (multi-phase)440 V
Rated voltage, DC (max.)60 V
Voltage typeAC
Rated frequency50 Hz
5SL6640-6 — Protection
ParameterValue
Tripping characteristic (trip curve)B
Rated breaking capacity (Icn), per EN 608986 kA
Rated breaking capacity, per IEC 60947-26 kA
Overvoltage category3
Degree of protection (IP)IP20, with connected conductors
Neutral conductor switchingYes
Touch protectionYes
5SL6640-6 — Mechanical
ParameterValue
Width in modular units4
Width72 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
SealableYes
5SL6640-6 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of ambient temperature (derating)Periodically +55°C, max. 95% humidity
5SL6640-6 — Performance
ParameterValue
Mechanical service life (switching cycles, typ.)10 000

Product details

The Siemens 5SL6640-6 is a 4-pole (3P+N) SENTRON miniature circuit breaker from the 5SL6 series, rated 40 A with a B tripping characteristic.

The 5SL6640-6 occupies 4 width units (72 mm) on a DIN rail, with a depth of 76 mm and an installation depth of 70 mm. Terminals accept solid or stranded conductors from 0.75 to 25 mm², with a tightening torque of 2.5 to 3 N·m. The neutral pole is switched (3P+N), and the unit is sealable — useful for installations requiring tamper-proofing after commissioning.

Frequently asked questions

What is the breaking capacity of 5SL6640-6?

The breaking capacity is 6 kA per both EN 60898 and IEC 60947-2, at 400 V AC.

What conductor sizes does 5SL6640-6 accept?

The terminals accept solid or stranded conductors from 0.75 to 25 mm², with a tightening torque of 2.5 to 3 N·m.

How do I get current pricing and availability for 5SL6640-6?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm response.

MPN
5SL6640-6