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Siemens 5SL3263-7MB — 2-Pole MCB (DIN Rail)

Siemens 5SL3263-7MB SENTRON MCB, 2-Pole, C-Curve, 63 A, 400

MPN5SL3263-7MB
Active

Siemens SENTRON 5SL3263-7MB miniature circuit breaker, 2-pole, C-curve, 63 A, 400 V AC, 4.5 kA per EN 60898, 2 MW units, IP20.

Siemens 5SL3263-7MB datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL3263-7MB — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentResidential buildings/infrastructure
5SL3263-7MB — Electrical
ParameterValue
Number of poles2
Supply voltage at AC rated value400 V
5SL3263-7MB — Protection
ParameterValue
Tripping characteristic classC
Overvoltage categoryIII
5SL3263-7MB — 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
5SL3263-7MB — Environmental
ParameterValue
Pollution degree2
5SL3263-7MB — Specifications
ParameterValue
According to EN 60898 rated value4.5 kA
With single-phase operation at AC rated value250 V
Energy Limitation Class3

Product details

Rated 63 A at 400 V AC, this breaker handles a 63 A continuous load on a 2-pole circuit. If your installation requires a higher interrupting rating (e.g., 10 kA), you would step up to the 3-pole 5SL4363-7, which carries 10 kA per both EN 60898 and IEC 60947-2. The 2-pole design (2 MW units, 36 mm wide) breaks both phase and neutral on a single-phase supply. For a 3-phase circuit you would need the 3-pole variant. The C-curve is specified for general-purpose and moderate inductive loads; if your load is purely resistive (heating, lighting) a B-curve would avoid nuisance trips, and for high-inrush loads (large transformers) a D-curve is standard.

Snap-on mounting to DIN rail EN 60715. Sealable design allows locking the breaker in the ON or OFF position for safety lockout/tagout.

Frequently asked questions

What is the breaking capacity of the 5SL3263-7MB?

The 5SL3263-7MB has a breaking capacity of 4.5 kA per EN 60898 at 400 V AC.

What is the width of the 5SL3263-7MB?

The width is 36 mm, which corresponds to 2 modular width units on a DIN rail.

Where can I buy the 5SL3263-7MB?

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

Will the 5SL3263-7MB drop into a panel designed for the 5SL4363-7?

No — the 5SL4363-7 is a 3-pole breaker (54 mm wide, 3 MW units) while the 5SL3263-7MB is 2-pole (36 mm wide). The panel would need a different DIN-rail layout or a blanking plate for the unused pole position.

MPN
5SL3263-7MB