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Siemens 5SL3440-7 — 4-Pole MCB (DIN Rail)

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)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL3440-7 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityResidential buildings/infrastructure
5SL3440-7 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated current (In), AC40 A
Rated voltage, AC (multi-phase)440 V
Rated voltage, DC (max.)72 V
Voltage typeAC
5SL3440-7 — Protection
ParameterValue
Tripping characteristic (trip curve)C
Rated breaking capacity (Icn), per EN 608984.5 kA
Rated breaking capacity, per IEC 60947-24.5 kA
Energy limitation class3
Overvoltage categoryIII
Pollution degree2
Degree of protection (IP)IP20, with connected conductors
Neutral conductor switchingNo
Touch protectionYes
5SL3440-7 — Mechanical
ParameterValue
Width in modular units4
Width72 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Tightening torque, max.75 °C
Tightening torque, min.-40 °C
SealableYes
5SL3440-7 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of ambient temperature (derating)Periodically +55°C, max. 95% humidity

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