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Siemens 5SP4340-7 — 2-Pole MCB (DIN Rail)

SENTRON 5SP4340-7 Miniature Circuit Breaker, 3-Pole, C, 40 A

MPN5SP4340-7

SENTRON 5SP Series, Miniature circuit breaker, 5SP4340-7, 3-pole, C-curve, 40 A, 10 kA (EN 60898) / 20 kA (IEC 60947-2), 400 V AC, 70 mm depth, tunnel terminals top and bottom.

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

Specifications

5SP4340-7 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
5SP4340-7 — Electrical
ParameterValue
Number of poles3
5SP4340-7 — Protection
ParameterValue
Tripping characteristic classC
5SP4340-7 — Mechanical
ParameterValue
Installation depth70 mm
5SP4340-7 — Other specifications
ParameterValue
Tunnel terminals topYes
Design of the product5SP Miniature circuit breakers
Number of poles (Note)2P
Tunnel terminals bottomYes
Circuit-breaker (Design)5SP4
Current (at AC)40 A
Acc. to EN 60898 / rated value10 kA
Acc. to IEC 60947-2 / rated value20 kA
Supply voltage (at AC)400 V

Product details

SENTRON 5SP4340-7 — 3-pole MCB, C-curve, 40 A

The SENTRON 5SP4340-7 is a 3-pole miniature circuit breaker from the 5SP4 design series, rated 40 A at 400 V AC with a C tripping characteristic. Tunnel terminals on both top and bottom simplify wiring — strip and clamp, no ring lugs needed.

The dual breaking-capacity rating is the key spec for panel coordination.

The 70 mm installation depth is shallower than the 76 mm of some peer 5SP variants — a useful margin when the enclosure back wall is tight against a gland plate or busbar trunking.

Frequently asked questions

How do I get current pricing and availability for 5SP4340-7?

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

What is the closest functional second-source to 5SP4340-7?

The 5SL4363-7 is the closest functional peer — also a 3-pole SENTRON MCB, C-curve, 400 V AC, 10 kA per EN 60898, but its IEC 60947-2 rating is 10 kA (half the 5SP4340-7's 20 kA) and its per-pole power loss is 5 W versus 10.9 W for the 5SP4340-7. The 5SP4292-7 is a 2-pole variant and would not drop into a 3-pole panel position without rewiring.

What is 5SP4340-7's listed number of poles?

The listed number of poles is 3.

What is 5SP4340-7's listed lifecycle stage?

The lifecycle stage is listed as current.

Will 5SP4340-7 drop into a panel specified around 5SP4292-7 without rewiring?

No — 5SP4292-7 is a 2-pole breaker, while 5SP4340-7 is 3-pole. The width and wiring differ; a 3-pole device cannot occupy a 2-pole position without adding a pole and re-feeding the third phase.

MPN
5SP4340-7