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Siemens 5SP4140-8 — 1-Pole MCB (DIN Rail)

SENTRON 5SP4140-8 Miniature Circuit Breaker, 1P D 40A

MPN5SP4140-8

SENTRON 5SP4 series, miniature circuit breaker, 1-pole, D tripping characteristic, 40 A rated current, 10 kA (EN 60898) / 20 kA (IEC 60947-2), 400 V AC, 70 mm installation depth.

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

Specifications

5SP4140-8 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
5SP4140-8 — Electrical & Protection
ParameterValue
Tripping characteristic classD
Rated value (EN 60898)10 kA
5SP4140-8 — Mounting & Connection
ParameterValue
Installation depth70 mm
5SP4140-8 — Other specifications
ParameterValue
Tunnel terminals topYes
Design of the product5SP Miniature circuit breakers
Number of poles (Note)1P
Tunnel terminals bottomYes
Circuit-breaker (Design)5SP4
Current (at AC)40 A
Acc. to IEC 60947-2 / rated value20 kA
Supply voltage (at AC)400 V

Product details

Single-pole D-curve MCB for high-inrush loads

The 70 mm installation depth means it sits flush with other SENTRON 5SP and 5SL breakers — no extra panel depth needed when swapping or expanding a sub-distribution board.

The 70 mm installation depth matches the standard SENTRON 5SP4 family, so a panel laid out for a 2-pole 5SP4292-7 will accept this 1-pole unit without re-drilling gland plates or re-routing busbars — just mind the pole count difference.

With 10 kA per EN 60898 and 20 kA per IEC 60947-2, the 5SP4140-8 provides SCCR headroom for industrial panels. The higher IEC rating is useful when the breaker is applied in a commercial/industrial context where the standard allows the 60947-2 figure. For selectivity coordination downstream of a larger SENTRON moulded-case or air circuit breaker, the D-curve's delayed magnetic trip helps achieve a selective cascade — the upstream device clears a high fault before the 5SP4140-8 trips, keeping healthy circuits live.

Frequently asked questions

What is the breaking capacity of 5SP4140-8?

The 5SP4140-8 is rated at 10 kA per EN 60898 and 20 kA per IEC 60947-2 at 400 V AC. The higher IEC figure applies when the breaker is used in industrial installations governed by that standard.

Will 5SP4140-8 drop into a panel designed for 5SP4292-7?

Mechanically yes — both share the 70 mm installation depth and DIN-rail mounting. The 5SP4140-8 is a 1-pole unit, while the 5SP4292-7 is 2-pole, so the panel's busbar arrangement and neutral/phase wiring must be adjusted for the pole count difference.

Where can I buy 5SP4140-8 and how is it quoted?

The 5SP4140-8 is sourced and quoted to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time — no stock figures or lead-time numbers are published here.

MPN
5SP4140-8