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Siemens 5SL4302-8 — 3-Pole MCB (DIN Rail)

Siemens 5SL4302-8 SENTRON MCB, 3P D 2A, 400V 10kA

MPN5SL4302-8
Active

Siemens SENTRON 5SL4302-8, 3-pole miniature circuit breaker, D characteristic, 2 A rated current at 400 V AC, 10 kA breaking capacity, 3 MW units.

Siemens 5SL4302-8 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL4302-8 — Identification
ParameterValue
Brand nameSENTRON
Number of poles3
Pole configuration3P
Suitability for operationResidential buildings/infrastructure
5SL4302-8 — Protection
ParameterValue
Tripping characteristic (curve)D
Breaking capacity per EN 6089810 kA
Breaking capacity per IEC 60947-210 kA
Overvoltage categoryIII
IP protection classIP20, with connected conductors
Energy limitation class3
Pollution degree2
5SL4302-8 — Electrical
ParameterValue
Rated voltage (AC, multi-phase)440 V
Voltage type (AC/DC)AC
Supply frequency range50/60 Hz
Power loss per pole at rated current (AC, hot)1.1 W
Mechanical service life (operating cycles, typ.)10 000
5SL4302-8 — Mechanical
ParameterValue
Modular width units3
Mounting positionany
Width54 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Terminal tightening torque, max.75 °C
Terminal tightening torque, min.-40 °C
SealableYes
Accepts supplementary devicesYes
5SL4302-8 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes

Product details

The Siemens SENTRON 5SL4302-8 is a 3-pole miniature circuit breaker with a D tripping characteristic, rated 2 A at 400 V AC and breaking 10 kA under both EN 60898 and IEC 60947-2.

At 30 °C ambient it holds the full 2 A. Push the panel to 40 °C and you're down to 1.92 A; at 45 °C it's 1.88 A; at 55 °C it's 1.79 A.

It's 3 modular width units (54 mm wide), 90 mm tall, 76 mm deep with a 70 mm installation depth behind the panel face. IP20 with conductors connected, so it's meant for enclosed distribution boards, not washdown areas. Sealable, halogen-free, silicon-free — matters if the panel goes into a clean room or food processing environment where outgassing is a concern. Supplementary devices (aux contacts, shunt trips, alarm switches) can be added on the side.

Frequently asked questions

Where can I buy 5SL4302-8 and how is it quoted?

We source the 5SL4302-8 through independent distribution channels and quote it to order against an RFQ. Availability and current pricing are confirmed at quote time — no stock count or price is published here because the market moves daily.

What is the breaking capacity of 5SL4302-8?

It's rated 10 kA per both EN 60898 and IEC 60947-2 at 400 V AC. That 10 kA is the maximum fault current it can safely interrupt — match it to your available fault current at the panel.

What does the D characteristic mean on this MCB?

The D curve trips magnetically at 10 to 20 times rated current (20 to 40 A for this 2 A unit). It's designed for loads with high inrush like small motors, transformers, or welding equipment — the short delay prevents nuisance trips on startup.

Will 5SL4302-8 drop into a panel specified for 5SL4363-7?

Not without checking your load. The 5SL4363-7 is a different amp rating and pole configuration — the 5SL4302-8 is 3-pole 2 A D-curve. Same SENTRON family, same DIN-rail footprint, but the current rating and protection curve must match the circuit design.

MPN
5SL4302-8