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Siemens 5SL4220-6 — 2-Pole MCB (DIN Rail)

Siemens 5SL4220-6 SENTRON MCB, 2-pole B-curve 20 A 10 kA

MPN5SL4220-6
Active

Siemens SENTRON 5SL4220-6 miniature circuit breaker, 2-pole, B-curve, 20 A, 10 kA breaking capacity per EN 60898 / IEC 60947-2, 400 V AC, 2 MW, IP20.

Siemens 5SL4220-6 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL4220-6 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentResidential buildings/infrastructure
5SL4220-6 — Electrical
ParameterValue
Number of poles2
Supply voltage at AC rated value400 V
5SL4220-6 — Protection
ParameterValue
Tripping characteristic classB
Overvoltage categoryIII
5SL4220-6 — 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
5SL4220-6 — Environmental
ParameterValue
Pollution degree2
5SL4220-6 — Specifications
ParameterValue
According to EN 60898 rated value10 kA
Energy Limitation Class3

Product details

Why the B-curve and 10 kA matter for the nacelle

That matters in a turbine tower where a pitch-drive power supply or converter auxiliary sees short spikes but needs real short-circuit protection. The -40 °C to 75 °C operating range survives a nacelle that freezes overnight and bakes in summer sun.

The 2-pole unit occupies 36 mm of rail width — two 18 mm slots. Sealable terminals (yes) allow the panel builder to lock the cover after commissioning. Halogen-free and silicon-free construction avoids outgassing issues in sealed enclosures.

Frequently asked questions

What is the breaking capacity of 5SL4220-6?

10 kA per EN 60898 and IEC 60947-2 at 400 V AC.

What is the temperature range for 5SL4220-6?

-40 °C to 75 °C operating range.

Where can I buy 5SL4220-6?

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

Will 5SL4220-6 drop into a panel specified around 5SL4363-7 without rewiring?

No — the 5SL4363-7 is a 3-pole, C-curve unit on a 54 mm (3 MW) footprint. The 5SL4220-6 is 2-pole, B-curve, 36 mm wide. Same depth (76 mm) and height (90 mm), so the busbar and enclosure cutout fit, but the pole count, tripping characteristic, and width differ. Rewiring the load and neutral is required.

MPN
5SL4220-6