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Siemens 5SL4420-8 — 4-Pole MCB (DIN Rail)

Siemens 5SL4420-8 SENTRON MCB, 4P D 20A, 10kA

MPN5SL4420-8
Active

Siemens SENTRON 5SL4420-8 miniature circuit breaker, 4-pole, D tripping characteristic, 20 A rated current, 10 kA breaking capacity at 400 V AC, 4 MW units.

Siemens 5SL4420-8 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SL4420-8 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityResidential buildings/infrastructure
5SL4420-8 — Ratings
ParameterValue
Number of poles4
Rated current (In), AC20 A
Rated voltage, AC (multi-phase)440 V
Rated voltage, DC (max.)72 V
5SL4420-8 — Protection
ParameterValue
Tripping characteristic (trip curve)D
Rated breaking capacity (Icn), per EN 6089810 kA
Rated breaking capacity, per IEC 60947-210 kA
Energy limitation class3
Overvoltage categoryIII
Pollution degree2
Degree of protection (IP)IP20, with connected conductors
Neutral conductor switchingNo
Touch protectionYes
5SL4420-8 — Mechanical
ParameterValue
Width in modular units4
Width72 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Tightening torque, max.75 °C
Tightening torque, min.-40 °C
SealableYes
5SL4420-8 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
5SL4420-8 — Performance
ParameterValue
Mechanical service life (switching cycles, typ.)10 000

Product details

Part identity and key ratings

The Siemens 5SL4420-8 is a SENTRON miniature circuit breaker (MCB) — 4-pole, D-curve, rated 20 A at 30 °C, with a 10 kA breaking capacity per both EN 60898 and IEC 60947-2 at 400 V AC. The D-curve (10–20× In magnetic trip) is sized for loads with high inrush — motor starters, small transformers, or lighting ballasts.

Thermal derating and operating envelope

Rated current is temperature-dependent: 20 A at 30 °C, 18.48 A at 40 °C, 17.6 A at 45 °C, and 15.92 A at 55 °C.

Installation depth is 70 mm — verify enclosure depth clearance before panel layout. Mounting position any, so vertical or horizontal busbars both work. Sealable, halogen-free, silicon-free construction. Touch protection integrated on the line-side terminals.

MPN
5SL4420-8