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Siemens 5SP4350-8 — 2-Pole MCB (DIN Rail)

SENTRON 5SP4350-8 Miniature Circuit Breaker, 3P D 50A

MPN5SP4350-8

SENTRON 5SP4 series, 5SP4350-8 miniature circuit breaker, 3-pole, D tripping characteristic, 50 A rated current, 400 V AC, 10 kA (EN 60898) / 20 kA (IEC 60947-2).

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

Specifications

5SP4350-8 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
5SP4350-8 — Electrical
ParameterValue
Number of poles3
5SP4350-8 — Protection
ParameterValue
Tripping characteristic classD
5SP4350-8 — Mechanical
ParameterValue
Installation depth70 mm
5SP4350-8 — Environmental
ParameterValue
Pollution degree3
5SP4350-8 — 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
Acc. to EN 60898 / rated value10 kA
Acc. to IEC 60947-2 / rated value20 kA
Supply voltage (at AC)400 V
Operating current (at AC)50 A

Product details

SENTRON 5SP4350-8 — 3-pole D-curve MCB at 50 A

The SENTRON 5SP4350-8 is a 3-pole miniature circuit breaker from the 5SP4 design family, rated 50 A at 400 V AC with a D tripping characteristic.

The 50 A continuous rating and D-curve make this a standard fit for motor feeder circuits in industrial panels — think conveyors, pumps, compressors where the locked-rotor current can hit 6–8× FLA for a few cycles. The 10 kA EN 60898 rating covers most distribution-board fault levels in commercial or light industrial installations; the 20 kA IEC 60947-2 rating applies when the MCB is used as a standalone industrial circuit breaker with higher prospective fault current.

Installation depth is 70 mm, which fits standard DIN-rail enclosures with adequate gutter space for cable bending radius. The 3-pole body occupies three modular width units (18 mm per pole, 54 mm total). Tunnel terminals accept conductors without special tools; strip length is typically 12–14 mm for the terminal design used on 5SP4 breakers.

Frequently asked questions

What is the breaking capacity of 5SP4350-8?

10 kA per EN 60898 for distribution-board duty, and 20 kA per IEC 60947-2 when applied as an industrial circuit breaker. The higher figure gives headroom for coordination with upstream devices in high-fault installations.

Where can I buy 5SP4350-8?

Sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment.

Will 5SP4350-8 drop into a panel specified around 5SP4292-7?

Not without checking the panel layout. 5SP4350-8 is a 3-pole D-curve 50 A breaker; 5SP4292-7 is a 2-pole C-curve unit. Pole count, width, and tripping characteristic differ — the 3-pole 5SP4350-8 needs three modular width units (54 mm) versus the 2-pole's two units (36 mm). The 70 mm installation depth is the same, but the wider footprint and different wiring may require re-termination.

MPN
5SP4350-8