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Siemens 5SL3140-7 — 1-Pole MCB (DIN Rail)

Siemens SENTRON 5SL3140-7 MCB, 1P C 40 A, 4.5 kA

MPN5SL3140-7

Siemens SENTRON 5SL3140-7 miniature circuit breaker, 1-pole, C-curve, 40 A, 4.5 kA per EN 60898, 5 kA per IEC 60947-2, 400 V AC, 18 mm wide.

Siemens 5SL3140-7 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL3140-7 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
Pole design1P
Application suitabilityResidential buildings/infrastructure
5SL3140-7 — Electrical & Protection
ParameterValue
Tripping characteristic classC
Energy limitation class3
Overvoltage categoryIII
5SL3140-7 — Mounting & Connection
ParameterValue
Mounting positionany
Width18 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Modular width units1
Torque, min.-40 °C
Torque, max.75 °C
SealableYes
5SL3140-7 — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Pollution degree2
Halogen-freeYes
Silicone-freeYes

Product details

It breaks 4.5 kA per EN 60898 and 5 kA per IEC 60947-2, so it handles typical residential and light commercial fault levels without cascading upstream. The C curve means it tolerates moderate inrush — fine for general-purpose loads like lighting, receptacles, and small motor circuits.

Derating and ambient range

At 40 °C it derates to 37.57 A, at 45 °C to 36.8 A, and at 55 °C to 33.61 A. If your panel runs warm — common in a crowded enclosure — factor the derating into the load schedule.

The 5SL3140-7 occupies one modular width (18 mm) on a DIN rail.

Frequently asked questions

Where can I buy 5SL3140-7 and how do I 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.

What is the difference between 5SL3140-7 and 5SL4106-7CC?

The 5SL4106-7CC is a 6 A C-curve 1-pole MCB in the same SENTRON 5SL family. The 5SL3140-7 is a 40 A unit. Both share the same 18 mm width, DIN-rail mount, and breaking capacity ratings, so a panel designed for the 6 A variant can accept the 40 A version without rewiring — just swap the module.

What compliance documentation does Siemens provide for 5SL3140-7?

The breaker carries approvals per EN 60898 and IEC 60947-2. The housing is halogen-free and silicon-free. Standard Siemens declarations for RoHS and REACH are available on request.

MPN
5SL3140-7