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Siemens 5SY3263-6 — 2-Pole MCB (DIN Rail)

Siemens 5SY3263-6 SENTRON MCB, 63A 2P B-Curve, 4.5kA

MPN5SY3263-6

Siemens SENTRON 5SY3 series, miniature circuit breaker (MCB), 5SY3263-6, 2-pole, 63 A, B tripping characteristic, 4.5 kA per EN 60898, 6 kA per IEC 60947-2, 400 V AC.

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

Specifications

5SY3263-6 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
5SY3263-6 — Electrical
ParameterValue
Number of poles2
5SY3263-6 — Protection
ParameterValue
Tripping characteristic classB
Overvoltage categoryIII
5SY3263-6 — Mechanical
ParameterValue
Width36 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Protection degree (IP)IP20, with connected conductors

Product details

Its 4.5 kA breaking capacity per EN 60898 covers standard domestic and light commercial fault levels, while the 6 kA rating per IEC 60947-2 gives headroom for industrial panel coordination.

The 4.5 kA (EN 60898) and 6 kA (IEC 60947-2) are the maximum prospective fault currents it can safely interrupt. For DC circuits, it's rated 15 kA at 72 V per IEC 60947-2, which covers many industrial control and battery-backed loads. The 5 kA at AC per UL 1077 / CSA C22.2 No.235 opens the door for North American panel builds.

Frequently asked questions

What is the breaking capacity of the 5SY3263-6?

It carries 4.5 kA per EN 60898, 6 kA per IEC 60947-2 at 400 V AC, and 15 kA at 72 V DC per IEC 60947-2. For UL 1077 / CSA C22.2 No.235 applications it's rated 5 kA at AC.

Where can I buy the 5SY3263-6?

Sourced and quoted to order against an RFQ through independent distribution; availability and current pricing confirmed at quote time.

Will the 5SY3263-6 drop into a panel specified around the 5SY3132-6?

Both are 2-pole SENTRON 5SY3 MCBs with the same 36 mm width (2 width units), same 76 mm depth, and same terminal range. The 5SY3263-6 is the 63 A B-curve variant; the 5SY3132-6 is a lower-current version. Footprint and busbar compatibility are identical — no rewiring needed for the swap.

MPN
5SY3263-6