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Siemens 5SL6540-6 — 1-Pole MCB (DIN Rail)

Siemens 5SL6540-6 SENTRON MCB, 1P+N, B Curve, 40 A, 6 kA

MPN5SL6540-6
Active

Siemens SENTRON 5SL6540-6 miniature circuit breaker, 1P+N, B characteristic, 40 A, 6 kA breaking capacity per EN 60898 and IEC 60947-2, 230 V AC, 2 MW.

Siemens 5SL6540-6 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

5SL6540-6 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles2
Application suitabilityResidential buildings/infrastructure
5SL6540-6 — Electrical & Protection
ParameterValue
Tripping characteristic classB
Rated value (EN 60898)6 kA
Energy limitation class3
Overvoltage categoryIII
5SL6540-6 — Mounting & Connection
ParameterValue
Mounting positionany
Width36 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Modular width units2
Torque, min.-40 °C
Torque, max.75 °C
SealableYes
5SL6540-6 — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Pollution degree2
Halogen-freeYes
Silicone-freeYes

Product details

It derates to 37.57 A at 40 °C and 33.61 A at 55 °C — if your panel runs hot, factor that in. The B curve (3–5× In) is deliberate: it avoids nuisance trips on lighting and general-purpose loads but will not hold motor inrush; for motor circuits you want C or D curve.

The neutral conductor is switched internally — no separate neutral bar needed downstream of this breaker. Mounting position is any orientation. Touch protection is built in. Sealable with a lead seal if the installation requires tamper evidence.

Frequently asked questions

What is the closest functional alternative to 5SL6540-6?

The 5SL6550-7BB is a sibling in the same SENTRON 5SL6 series but with a C characteristic instead of B. If your load has moderate inrush (small motors, transformers), the C curve may be a better fit. Physically it shares the same 2 MW footprint and 6 kA breaking capacity, so it drops into the same panel without rewiring. The deciding factor is the trip curve: B for resistive/lighting, C for mixed loads.

Where can I buy 5SL6540-6 and how is it quoted?

Sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — no stock count or price is published here. Submit an RFQ for your quantity and target schedule.

What compliance documentation is available for 5SL6540-6?

The breaker carries approvals per EN 60898 and IEC 60947-2, with a 6 kA breaking capacity under both standards. It is halogen-free and silicon-free. For specific declarations (RoHS, REACH, UL), request the manufacturer's compliance documents with your RFQ — these are typically provided at order confirmation.

MPN
5SL6540-6