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Siemens 5SL6340-7MB — 3-Pole MCB (DIN Rail)

Siemens 5SL6340-7MB SENTRON MCB, 3P C 40A 6kA 400V

MPN5SL6340-7MB
Active

Siemens SENTRON 5SL6340-7MB miniature circuit breaker, 3-pole, C-curve, 40 A rated, 6 kA breaking capacity per EN 60898 at 400 V AC, 3 modular width units.

Siemens 5SL6340-7MB datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL6340-7MB — Identification
ParameterValue
Brand nameSENTRON
Number of poles3
Pole configuration3P
Suitability for operationResidential buildings/infrastructure
5SL6340-7MB — Protection
ParameterValue
Tripping characteristic (curve)C
Breaking capacity per EN 608986 kA
Overvoltage categoryIII
IP protection classIP20, with connected conductors
Energy limitation class3
Pollution degree2
5SL6340-7MB — 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)3.3 W
Mechanical service life (operating cycles, typ.)10 000
Rated voltage (AC, single-phase)250 V
5SL6340-7MB — 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
SealableYes
Accepts supplementary devicesYes
5SL6340-7MB — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes

Product details

The Siemens 5SL6340-7MB is a SENTRON miniature circuit breaker — 3-pole, C-curve, rated 40 A with a 6 kA breaking capacity per EN 60898 at 400 V AC.

IP20 with connected conductors — finger-safe once wired, but not sealed against moisture; keep it inside the enclosure. Mounting position is unrestricted, which helps when the panel layout is tight.

If your service entrance has a prospective short-circuit current above 6 kA, you'd step up to the 5SL4363-7 (10 kA) sibling. The 40 A rating on a C-curve handles motor inrush from small pumps or compressors without tripping, but it's not a motor-protective device; pair it with a contactor and overload for motor circuits.

Frequently asked questions

Where can I buy the 5SL6340-7MB and get a price?

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 price and lead time.

What's the difference between the 5SL6340-7MB and the 5SL4363-7?

The 5SL4363-7 is the higher-breaking-capacity sibling: 10 kA per both EN 60898 and IEC 60947-2, versus 6 kA on the 5SL6340-7MB. Same 3-pole C-curve 40 A rating, same physical footprint (54 mm wide, 76 mm deep). If your panel's available fault current exceeds 6 kA, the 5SL4363-7 is the correct choice; otherwise the 5SL6340-7MB is functionally identical and costs less.

Will the 5SL6340-7MB drop into a panel specified around the 5SL4363-7?

Yes — same DIN-rail footprint, same 54 mm width, same 76 mm depth, same 70 mm installation depth. No rewiring or busbar changes needed. The only difference is the interrupting rating.

What compliance documentation is available for the 5SL6340-7MB?

The SENTRON series carries CE marking, meets RoHS and REACH requirements, and is designed to EN 60898 and IEC 60947-2. Specific UL/CSA documentation should be confirmed against the project's jurisdiction; the standard catalog listing does not include UL/CSA marks for this variant.

MPN
5SL6340-7MB