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Siemens 5SY6420-7 — 4-Pole MCB (DIN Rail)

Siemens 5SY6420-7 SENTRON MCB, 4P, C-curve, 6kA/15kA

MPN5SY6420-7
Active

Siemens SENTRON 5SY6420-7, miniature circuit breaker, 4-pole, C characteristic, 6 kA (EN 60898-1) / 15 kA (IEC 60947-2), 400 V AC, 72 mm wide.

$21.59Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

5SY6420-7 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY6420-7 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated voltage, AC (multi-phase)440 V
5SY6420-7 — Protection
ParameterValue
Tripping characteristic (trip curve)C
Energy limitation class3
Overvoltage categoryIII
Pollution degree3
Degree of protection (IP)IP20, with connected conductors
5SY6420-7 — 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
5SY6420-7 — 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
5SY6420-7 — Performance
ParameterValue
Power loss per pole, AC (hot state, at In)1.7 W

Product details

It carries a 6 kA breaking capacity per EN 60898-1 and 15 kA per IEC 60947-2, with a 5 kA rating under UL 1077 and CSA C22.2 No.235.

Breaking capacity and standards

The 6 kA EN 60898-1 rating applies to domestic-type installations; the 5 kA UL 1077 rating covers North American supplementary protection. It also carries a 15 kA DC rating at 60 V (72 V max) per IEC 60947-2, which is useful for DC control circuits in the same panel.

The 5SY6420-7 occupies 4 modular width units (72 mm) on a DIN rail, with a depth of 76 mm and an installation depth of 70 mm. It mounts in any position, which simplifies layout in tight enclosures.

Frequently asked questions

What is the breaking capacity of 5SY6420-7?

6 kA per EN 60898-1, 15 kA per IEC 60947-2 at 400 V AC, and 5 kA per UL 1077. At DC it's rated 15 kA at 60 V (72 V max) per IEC 60947-2.

What standards does the 5SY6420-7 comply with?

IEC/EN 60898-1, IEC/EN 60947-2, and UL 1077 / CSA C22.2 No.235. It is halogen-free and silicon-free.

Where can I buy 5SY6420-7?

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

Will 5SY6420-7 drop into a panel specified around 5SY4140-7?

The 5SY4140-7 is a 4-pole MCB in the same SENTRON family, so the DIN-rail footprint and terminal layout are identical. The key difference is the tripping characteristic — the 5SY6420-7 is a C-curve, while the 5SY4140-7 is a D-curve. If the original design called for a D-curve (high inrush, like large transformers or welding equipment), swapping to a C-curve may cause nuisance tripping on startup. Check the load type before substituting.

MPN
5SY6420-7