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Siemens 5SY6420-6CC — 4-Pole MCB (DIN Rail)

Siemens 5SY6420-6CC SENTRON MCB, 4P B-Char 20A, 6kA IEC

MPN5SY6420-6CC

Siemens SENTRON 5SY6 series, miniature circuit breaker, 4-pole, B tripping characteristic, 20 A rated current, 6 kA breaking capacity per IEC 60898, 400 V AC.

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

Specifications

5SY6420-6CC — Identification
ParameterValue
Type / order code5SY6CC
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY6420-6CC — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated current (In), AC400 V
Rated current (In), AC20 A
Rated voltage, AC (multi-phase)440 V
Rated voltage, AC (single-phase)440 V
Rated voltage, DC (max.)72 V
Voltage typeAC
Rated frequency50/60 Hz
5SY6420-6CC — Protection
ParameterValue
Tripping characteristic (trip curve)B
Rated breaking capacity (Icn), per EN 608986 kA
Breaking capacity, AC (UL 1077 / CSA C22.2 No.235)5 kA
Overvoltage categoryIII
Degree of protection (IP)IP20, with connected conductors
Neutral conductor switchingNo
Touch protectionYes
5SY6420-6CC — Mechanical
ParameterValue
Width in modular units4
Width72 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Combined terminal, topYes
Combined terminal, bottomYes
SealableYes
5SY6420-6CC — 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
5SY6420-6CC — Performance
ParameterValue
Mechanical service life (switching cycles, typ.)10 000

Product details

It provides 6 kA breaking capacity per IEC 60898 and 5 kA per UL 1077 / CSA C22.2 No. 235, making it suitable for protecting branch circuits in industrial control panels and mechanical engineering applications.

The 6 kA breaking capacity at 400 V AC (IEC 60898) covers most industrial distribution panels; the 5 kA rating under UL 1077 means it also satisfies North American supplementary-protection requirements. Wire range accepts 0.75 to 35 mm² solid or stranded, with a tightening torque of 2.5 to 3.5 N·m on the screw terminals. The 4-pole (4P) format occupies 4 width units (72 mm) on the DIN rail, with a depth of 76 mm and an installation depth of 70 mm.

Deployment context

The halogen-free and silicon-free construction is relevant for environments where outgassing must be minimized — clean rooms, food processing, or marine applications.

Frequently asked questions

What compliance documentation does Siemens provide for the 5SY6420-6CC?

The MCB carries IEC 60898 (6 kA) and UL 1077 / CSA C22.2 No. 235 (5 kA) certifications. It is halogen-free and silicon-free. Standard Siemens declarations for RoHS and REACH are available on request.

Where can I buy the 5SY6420-6CC and how is it quoted?

The 5SY6420-6CC is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your required quantity and delivery schedule.

MPN
5SY6420-6CC