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Siemens 5SN6140-7CP — 1-Pole MCB (DIN Rail)

Siemens 5SN6140-7CP MCB, 1 Pole, 6 kA EN 60898, 10 kA IEC 60

MPN5SN6140-7CP

Siemens SENTRON 5SN series, 5SN6140-7CP, 1-pole miniature circuit breaker, 400 V AC, 6 kA (EN 60898) / 10 kA (IEC 60947-2), 72 V DC max, 1 MWU.

Siemens 5SN6140-7CP datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SN6140-7CP — Identification
ParameterValue
Number of poles1
5SN6140-7CP — Mounting & Connection
ParameterValue
Width18 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Modular width units1
Torque, min.-40 °C
Torque, max.75 °C

Product details

Siemens 5SN6140-7CP — 1-pole MCB, 400 V AC, 6/10 kA breaking capacity

The Siemens 5SN6140-7CP is a 1-pole miniature circuit breaker from the SENTRON 5SN series, rated for 400 V AC at 50 Hz with a breaking capacity of 6 kA per EN 60898 and 10 kA per IEC 60947-2. The 72 V DC maximum rating covers control-circuit protection in DC rail applications.

Integration — panel fit, conductor sizing, and thermal management

Snap-on DIN rail mount, 1 MWU (18 mm). Accepts solid conductors up to 35 mm² — enough for the load-side feed on a 40 A circuit.

Frequently asked questions

Where can I buy 5SN6140-7CP and how do I get a price?

The 5SN6140-7CP is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

When sourcing 5SN6140-7CP, what's the closest functional second-source — 5SL6120-7?

The 5SL6120-7 is a peer from the same SENTRON family with identical dimensions (18 mm width, 76 mm depth, 70 mm installation depth), so it drops into the same panel slot without rewiring. However, the 5SL6120-7 carries a 6 kA rating under IEC 60947-2 (versus 10 kA for the 5SN6140-7CP) and a different tripping characteristic — verify coordination with your upstream protective device before substituting.

What is 5SN6140-7CP's listed depth (76 mm) on this component line?

The overall depth is 76 mm; the installation depth (behind the panel face) is 70 mm.

What is 5SN6140-7CP's listed width (18 mm) on this component line?

Width is 18 mm, which equals one modular width unit (1 MWU) on standard DIN rail.

Will 5SN6140-7CP drop into a panel that was specified around 5SL6120-7 without rewiring?

Yes — both share the same 18 mm width, 76 mm depth, and 70 mm installation depth, so the physical fit is identical. No rewiring is needed for the DIN-rail mounting or conductor connections. Just confirm the tripping characteristic and breaking capacity match your panel's coordination study.

MPN
5SN6140-7CP