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Siemens 5SY4420-6KK11 — 4-Pole MCB (DIN Rail)

Siemens 5SY4420-6KK11 SENTRON MCB, 4P, 20 A, B Curve, 10 kA

MPN5SY4420-6KK11

Siemens SENTRON 5SY4420-6KK11 miniature circuit breaker, 4-pole, 20 A, B tripping characteristic, 10 kA breaking capacity per EN 60898, 20 kA per IEC 60947-2, IP20, -40 to 75 °C.

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

Specifications

5SY4420-6KK11 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY4420-6KK11 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated current (In), AC20 A
Rated voltage, AC (multi-phase)440 V
Rated voltage, AC (single-phase)440 V
Voltage typeAC
5SY4420-6KK11 — Protection
ParameterValue
Tripping characteristic (trip curve)B
Rated breaking capacity (Icn), per EN 6089810 kA
Rated breaking capacity, per IEC 60947-220 kA
Breaking capacity, AC (UL 1077 / CSA C22.2 No.235)5 kA
Energy limitation class3
Overvoltage categoryIII
Pollution degree3
Degree of protection (IP)IP20, with connected conductors
Neutral conductor switchingNo
Touch protectionYes
5SY4420-6KK11 — Mechanical
ParameterValue
Width in modular units4
Width72 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Fastening / mounting methodQuick assembly system
Mounting positionany
Combined terminal, topYes
Combined terminal, bottomYes
Tightening torque, max.75 °C
Tightening torque, min.-40 °C
SealableYes
5SY4420-6KK11 — Environmental
ParameterValue
Halogen-freeYes
Silicone-freeYes
Influence of ambient temperature (derating)max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C

Product details

Designed for railway applications per its designation, it also suits general mechanical engineering and industrial panels.

At 20 A it feeds a 20 A sub-feed or a group of smaller circuits. The temperature derating table is published: at 40 °C it carries 19.04 A, at 50 °C it carries 18.04 A, at 60 °C it carries 16.96 A — so if your panel ambient runs hot, you need to account for that.

Sealable, halogen-free, silicon-free — suitable for environments where outgassing or contamination matters. Touch protection is built in.

Frequently asked questions

Who supplies 5SY4420-6KK11 and how is it quoted for volume purchases?

We source this part through independent distribution channels. Submit an RFQ for volume pricing and current availability; quotes are confirmed at time of request.

What is 5SY4420-6KK11's listed depth?

The depth is 76 mm, with an installation depth of 70 mm.

What is 5SY4420-6KK11's listed width?

The width is 72 mm, which corresponds to 4 modular width units on a DIN rail.

MPN
5SY4420-6KK11