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Siemens 5SL1206-6MB — 2-Pole MCB (DIN Rail)

Siemens 5SL1206-6MB SENTRON MCB, 2P B-Curve 6A 3kA

MPN5SL1206-6MB

Siemens SENTRON 5SL1206-6MB, 2-pole miniature circuit breaker, B-curve, 6 A rated current, 3 kA breaking capacity per IEC 60947-2, 230/400 V AC, 36 mm width.

Siemens 5SL1206-6MB datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL1206-6MB — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentResidential buildings/infrastructure
5SL1206-6MB — Electrical
ParameterValue
Number of poles2
Supply voltage at AC rated value230 V
5SL1206-6MB — Protection
ParameterValue
Tripping characteristic classB
Overvoltage categoryIII
5SL1206-6MB — 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
5SL1206-6MB — Environmental
ParameterValue
Pollution degree2
5SL1206-6MB — Specifications
ParameterValue
With single-phase operation at AC rated value253 V

Product details

It occupies 2 modular width units (36 mm) on a DIN rail and is designed for residential and infrastructure branch-circuit protection at 230/400 V AC, 50/60 Hz.

The 6 A rating is the continuous thermal current; at 40 °C ambient the breaker carries its full 6 A without derating, though the 1.1 W power loss per pole at rated current means you should allow natural convection in a crowded enclosure. The 2-pole design switches both phase and neutral (or two phases in a 2-phase circuit), and the sealable toggle allows lockout/tagout for maintenance isolation.

DIN-rail integration note

Frequently asked questions

What is the depth and width of 5SL1206-6MB?

The depth is 76 mm and the width is 36 mm (2 modular width units). The installation depth behind the panel face is 70 mm.

Will 5SL1206-6MB drop into a panel specified around 5SL4363-7 without rewiring?

No — the 5SL4363-7 is a 3-pole, C-curve breaker rated 63 A with a 10 kA breaking capacity, occupying 3 MW (54 mm). The 5SL1206-6MB is 2-pole, B-curve, 6 A, 3 kA, and 36 mm wide. The footprint, current rating, and trip characteristic are all different; a panel designed for the 5SL4363-7 would require rewiring and a different busbar arrangement.

How do I get pricing and availability for 5SL1206-6MB?

The part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote (RFQ) to confirm current pricing and availability — no stock count or lead-time number is published here.

MPN
5SL1206-6MB