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Siemens 5SL3203-7 — 2-Pole MCB (DIN Rail)

Siemens 5SL3203-7 SENTRON MCB, 2-pole C-curve 3A 4.5kA

MPN5SL3203-7

Siemens SENTRON 5SL3203-7 miniature circuit breaker, 2-pole, C characteristic, 3 A rated, 400 V AC, 4.5 kA breaking capacity per EN 60898, 2 modular width units (36 mm).

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

Specifications

5SL3203-7 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentResidential buildings/infrastructure
5SL3203-7 — Electrical
ParameterValue
Number of poles2
Supply voltage at AC rated value400 V
5SL3203-7 — Protection
ParameterValue
Tripping characteristic classC
Overvoltage categoryIII
5SL3203-7 — Mechanical
ParameterValue
Modular width units2
Width36 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Min.-40 °C
Max.75 °C
Protection degree (IP)IP20, with connected conductors
5SL3203-7 — Environmental
ParameterValue
Pollution degree2
5SL3203-7 — Specifications
ParameterValue
According to EN 60898 rated value4.5 kA
Energy Limitation Class3

Product details

What this MCB does in the panel

It protects branch circuits in residential and infrastructure panels against overload and short-circuit faults. Breaking capacity is 4.5 kA per EN 60898 and 5 kA per IEC 60947-2 at 400 V AC — adequate for most domestic and light commercial distribution boards where the prospective short-circuit current stays under that threshold. The 2-pole form switches both line and neutral in a single-width module, saving rail space over a 1P+N arrangement. IP20 with conductors connected — standard for enclosed distribution boards. Sealable terminals and halogen-free / silicon-free construction meet the material restrictions common in healthcare and public-building specs.

Coordination and compliance notes

Mechanical service life of 10 000 operating cycles typical.

Frequently asked questions

Where can I buy 5SL3203-7 and get a price?

The 5SL3203-7 is 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 price and lead time.

What is the difference between 5SL3203-7 and 5SL4363-7?

The 5SL4363-7 is a 3-pole version rated 10 kA breaking capacity (vs 4.5 kA) and 54 mm wide (3 modular units) compared to the 2-pole 36 mm width of the 5SL3203-7. The 5SL4363-7 also dissipates 5 W per pole versus 1.2 W. They share the same C-curve, 400 V AC rating, and SENTRON family design, but the 5SL4363-7 is a higher-capacity breaker for three-phase branch circuits.

What compliance documentation does Siemens provide for 5SL3203-7?

The 5SL3203-7 carries ratings per EN 60898 (4.5 kA) and IEC 60947-2 (5 kA). It is halogen-free and silicon-free. Standard Siemens SENTRON documentation includes CE declaration of conformity and manufacturer declarations for RoHS and REACH compliance available on request.

MPN
5SL3203-7