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Siemens 5SL1210-6MB — 2-Pole MCB (DIN Rail)

Siemens 5SL1210-6MB SENTRON MCB, 2-Pole B Curve 10A, 3kA

MPN5SL1210-6MB

Siemens SENTRON 5SL1210-6MB miniature circuit breaker, 2-pole, B characteristic, 10 A rated current, 3 kA breaking capacity (IEC 60947-2), 230/440 V AC, 2 MW width.

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

Specifications

5SL1210-6MB — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentResidential buildings/infrastructure
5SL1210-6MB — Electrical
ParameterValue
Number of poles2
Supply voltage at AC rated value230 V
5SL1210-6MB — Protection
ParameterValue
Tripping characteristic classB
Overvoltage categoryIII
5SL1210-6MB — 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
5SL1210-6MB — Environmental
ParameterValue
Pollution degree2
5SL1210-6MB — Specifications
ParameterValue
With single-phase operation at AC rated value253 V

Product details

What it is and what the ratings mean

The Siemens 5SL1210-6MB is a 2-pole miniature circuit breaker from the SENTRON family, rated 10 A with a B tripping characteristic. The B curve means it trips at 3–5 times rated current — standard for protecting residential and light commercial circuits feeding resistive or general-purpose loads where inrush is low. Breaking capacity is 3 kA per IEC 60947-2, which covers most final subcircuits in a building distribution board; if your fault current at the panel exceeds that, you need upstream current-limiting or a higher-rated breaker.

Where it fits and how it mounts

Snaps onto a standard DIN rail — 2 modular-width units (36 mm wide). Depth is 76 mm, installation depth 70 mm. Mounting position is any.

Lifecycle and sourcing

This is a current-production part. The 5SL1210-6MB is a standard catalog item in the SENTRON MCB line.

Frequently asked questions

Will 5SL1210-6MB drop into a panel that was specified around 5SL4363-7 without rewiring?

No — the 5SL4363-7 is a 3-pole C-curve breaker with a 54 mm width (3 MW) and 10 kA breaking capacity; the 5SL1210-6MB is a 2-pole B-curve at 36 mm (2 MW) and 3 kA. They share the same 76 mm depth and DIN-rail footprint, but the pole count, curve, and width differ, so a panel designed for the 5SL4363-7 would need rewiring and busbar adjustment.

MPN
5SL1210-6MB