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Siemens 5SL1213-6MB — 2-Pole MCB (DIN Rail)

Siemens 5SL1213-6MB SENTRON MCB, 2P B 13A 3kA

MPN5SL1213-6MB

Siemens SENTRON 5SL miniature circuit breaker, 2-pole, B characteristic, 13 A rated current, 3 kA breaking capacity per IEC 60947-2, 230/400 V AC, order code 5SL1213-6MB.

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

Specifications

5SL1213-6MB — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentResidential buildings/infrastructure
5SL1213-6MB — Electrical
ParameterValue
Number of poles2
5SL1213-6MB — Protection
ParameterValue
Tripping characteristic classB
Overvoltage categoryIII
5SL1213-6MB — Mechanical
ParameterValue
Width36 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Protection degree (IP)IP20, with connected conductors

Product details

The 2-pole (2P) form factor switches both phase and neutral — no neutral pole switching here, so the neutral is switched together with the line. Rated 230/400 V AC, it handles single-phase circuits at 253 V and multi-phase up to 440 V.

B-curve and breaking capacity — what they mean on the line

It avoids nuisance trips on small motor starts or capacitive loads that a C-curve would handle, but for this 13 A rating the B curve is correct for its intended duty in residential and infrastructure panels. The 3 kA rating is common for domestic-grade MCBs; industrial panels typically spec 6 kA or 10 kA.

Accepts solid or stranded conductors from 0.75 mm² up to 25 mm², which covers everything from 1.5 mm² lighting circuits up to 6 mm² feeder tails. Terminal torque spec is 2.5–3 N·m — use a torque screwdriver to avoid loose connections that generate heat under load. Mounts in any position, so it works in horizontal busbar panels or vertical distribution boards.

Sealable — you can lock the toggle position to prevent unauthorized switching.

Frequently asked questions

What is the 5SL1213-6MB's breaking capacity?

It is rated 3 kA per IEC 60947-2 at 400 V AC. This is the maximum fault current it can safely interrupt.

Where can I buy the 5SL1213-6MB?

We source this part to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What wire sizes does the 5SL1213-6MB accept?

It accepts solid or stranded conductors from 0.75 mm² up to 25 mm². Terminal torque should be set to 2.5–3 N·m.

MPN
5SL1213-6MB