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Siemens 5SL4503-8 — 1-Pole MCB (DIN Rail)

Siemens 5SL4503-8 SENTRON MCB, 1P+N, D Curve, 3 A, 10 kA

MPN5SL4503-8
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Siemens SENTRON 5SL4503-8 miniature circuit breaker, 1P+N, D tripping characteristic, 3 A rated current, 230 V AC, 10 kA breaking capacity per EN 60898.

Siemens 5SL4503-8 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL4503-8 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles2
Application suitabilityResidential buildings/infrastructure
5SL4503-8 — Electrical & Protection
ParameterValue
Tripping characteristic classD
Rated value (EN 60898)10 kA
Energy limitation class3
Overvoltage categoryIII
5SL4503-8 — Mounting & Connection
ParameterValue
Mounting positionany
Width36 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Modular width units2
Torque, min.-40 °C
Torque, max.75 °C
SealableYes
5SL4503-8 — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Pollution degree2
Halogen-freeYes
Silicone-freeYes

Product details

The Siemens SENTRON 5SL4503-8 is a 1P+N miniature circuit breaker with a D tripping characteristic, rated 3 A at 230 V AC, and a 10 kA breaking capacity per EN 60898 and IEC 60947-2. It switches the neutral conductor, so it is a switched-neutral MCB, not a common 1P unit that leaves the neutral solid.

Ratings that matter for fit

The 3 A rating derates with ambient temperature: 2.88 A at 40 °C, 2.69 A at 55 °C.

Panel integration

Snap-on DIN-rail mounting in any position. Terminal touch protection is built in.

Frequently asked questions

What is the breaking capacity of the 5SL4503-8?

10 kA per both EN 60898 and IEC 60947-2. That is the maximum prospective fault current it can safely interrupt at 230 V AC.

What does the D curve mean for a 3 A MCB?

The D tripping characteristic allows momentary inrush currents 10–20 times the 3 A rating before the magnetic trip operates. This suits loads with high starting currents — small motors, transformers, or capacitive loads — without nuisance tripping.

Where can I buy the 5SL4503-8?

This part is sourced and quoted to order against an RFQ through independent industrial-automation distribution. Availability and current pricing are confirmed at quote time.

Does the 5SL4503-8 switch the neutral?

Yes, it is a 1P+N design with neutral-conductor switching. Both the phase and neutral poles open and close together, isolating the load completely.

MPN
5SL4503-8