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Siemens 5SL3440-7 — Miniature Circuit Breakers (MCB)

Siemens 5SL3440-7 SENTRON MCB, 4P C-curve 40A 400V AC

MPN5SL3440-7

Siemens SENTRON 5SL3440-7, 4-pole miniature circuit breaker, C-curve, 40 A rated at 400 V AC, 4.5 kA breaking capacity per EN 60898 and IEC 60947-2.

Siemens 5SL3440-7 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

5SL3440-7 — Ratings
ParameterValue
Overvoltage categoryIII
5SL3440-7 — Mechanical
ParameterValue
Width72 mm
Height90 mm
Depth76 mm

Product details

The 4-pole (4P) design switches all phases and the neutral is not switched — the neutral conductor is through-wired, not interrupted.

Sealable terminals and touch protection are standard, which simplifies compliance with VDE 0100 for residential final circuits.

Temperature derating is published: at 40 °C ambient the rated current drops to 38.07 A, at 45 °C to 36.8 A, and at 55 °C to 34.97 A. Halogen-free and silicon-free construction supports use in environments sensitive to corrosive off-gassing, such as data centers or clean manufacturing lines.

Frequently asked questions

How do I get pricing and availability for 5SL3440-7?

Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.

What is the breaking capacity of 5SL3440-7?

4.5 kA per both EN 60898 and IEC 60947-2, at 400 V AC.

Will 5SL3440-7 drop into a panel specified around 5SL3340-7CC?

Both are 4-pole SENTRON MCBs on the same DIN-rail footprint (4 modular units wide), so physical fit is identical. The 5SL3340-7CC is a 40 A C-curve variant as well; the difference is in the breaking capacity or optional features — check the specific rating of the original to confirm electrical substitution.

What compliance documentation does Siemens provide for 5SL3440-7?

The part carries IEC 60947-2 and EN 60898 certifications; it is halogen-free and silicon-free. Specific RoHS, REACH, and UL declarations are available from Siemens documentation for the SENTRON 5SL series.

MPN
5SL3440-7