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Siemens 5SL6340-6 — Miniature Circuit Breakers (MCB)

Siemens 5SL6340-6 SENTRON MCB, 3P, 40A, B Curve, 6kA

MPN5SL6340-6
Active

Siemens SENTRON 5SL6340-6, miniature circuit breaker, 3-pole, B characteristic, 40 A rated current, 6 kA breaking capacity at 400 V AC, 3 modular width units.

Siemens 5SL6340-6 datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

5SL6340-6 — Ratings
ParameterValue
Overvoltage categoryIII
5SL6340-6 — Mechanical
ParameterValue
Width54 mm
Height90 mm
Depth76 mm

Product details

Rated for 40 A, B curve, 6 kA — what that means for the panel

The Siemens 5SL6340-6 is a 3-pole SENTRON miniature circuit breaker rated 40 A with a B tripping characteristic, breaking 6 kA at 400 V AC per both EN 60898 and IEC 60947-2. Overvoltage category III (distribution-level) and pollution degree 2 confirm it is intended for fixed installation inside a distribution board, not on the factory floor.

Fit, footprint, and integration into the enclosure

Mounting position is unrestricted — can be installed sideways or upside down in a tight enclosure without derating the 40 A rating. IP20 with connected conductors, so it requires a distribution board cover for touch protection. Sealable, halogen-free, and silicon-free — relevant for clean-room or marine-adjacent builds where outgassing or seal integrity matters.

Power loss and thermal considerations

For a 3-pole breaker at full load, that is 10.2 W total dissipated inside the enclosure — a factor when calculating temperature rise in a densely packed distribution board.

Frequently asked questions

Where can I buy 5SL6340-6 and get a price?

The 5SL6340-6 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 commercial offer.

Will 5SL6340-6 drop into a panel specified around 5SL4363-7?

Yes, the 5SL6340-6 and the 5SL4363-7 share identical dimensions (76 mm depth, 54 mm width, 90 mm height), mounting position, installation depth, and enclosure class. The difference is the tripping characteristic: 5SL6340-6 is B curve, 5SL4363-7 is C curve. If the panel design calls for C curve (5–10× In instantaneous trip) for motor or transformer loads, swapping to B curve may cause nuisance tripping on inrush. For resistive or general-purpose circuits where B curve is appropriate, the physical fit is a direct drop-in.

What is the breaking capacity of 5SL6340-6?

6 kA at 400 V AC per both EN 60898 and IEC 60947-2. This is the rated short-circuit breaking capacity — the maximum fault current the breaker can safely interrupt.

MPN
5SL6340-6