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Siemens 5SY4401-7KK11 — 4-Pole MCB (DIN Rail)

Siemens 5SY4401-7KK11 SENTRON MCB, 4P C 1A, 10kA/35kA

MPN5SY4401-7KK11

Siemens SENTRON 5SY4401-7KK11, 4-pole miniature circuit breaker, C-curve 1 A, 10 kA per EN 60898-1 / 35 kA per IEC 60947-2, 4 MW, IP20.

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

Specifications

5SY4401-7KK11 — Identification
ParameterValue
Brand nameSENTRON
Application suitabilityMechanical engineering / industry
5SY4401-7KK11 — Ratings
ParameterValue
Number of poles4
Pole configuration4P
Rated current (In), AC1 A
Rated voltage, AC (multi-phase)440 V
Rated voltage, AC (single-phase)440 V
5SY4401-7KK11 — Protection
ParameterValue
Tripping characteristic (trip curve)C
Energy limitation class3
Overvoltage categoryIII
Pollution degree3
Degree of protection (IP)IP20, with connected conductors
Touch protectionYes
5SY4401-7KK11 — 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
5SY4401-7KK11 — 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
5SY4401-7KK11 — Performance
ParameterValue
Mechanical service life (switching cycles, typ.)10 000

Product details

Siemens SENTRON 5SY4401-7KK11 — 4-pole C-curve MCB at 1 A

The Siemens SENTRON 5SY4401-7KK11 is a 4-pole miniature circuit breaker with C-curve tripping characteristic, rated 1 A at AC. It breaks fault currents up to 10 kA per DIN EN60898-1 and 35 kA per IEC 60947-2, so it handles both residential-class and industrial-class fault levels without upstream coordination headaches. The 4 MW (modular width) footprint occupies 72 mm on the DIN rail, with an installation depth of 70 mm and overall depth of 76 mm.

Touch protection is built in. The breaker is sealable, allowing panel builders to lock the toggle position after commissioning.

Frequently asked questions

What are the key ratings of 5SY4401-7KK11?

It is a 4-pole miniature circuit breaker with C-curve characteristic, rated 1 A at AC. Breaking capacity is 10 kA per DIN EN60898-1 and 35 kA per IEC 60947-2. It occupies 4 modular width units (72 mm) on DIN rail.

Where can I buy 5SY4401-7KK11 and how is it quoted?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock figures or price lists are published here.

Will 5SY4401-7KK11 drop into a panel specified around 5SY4301-7CV?

Both are 4-pole SENTRON MCBs on the same DIN-rail footprint, so mechanical fit is identical. The key difference is the rating: 5SY4401-7KK11 is a 1 A C-curve, while the 5SY4301-7CV is a different amp rating. Verify the branch circuit load before substituting — the physical swap is straightforward, but the protection curve must match the load.

What compliance documentation does Siemens provide for 5SY4401-7KK11?

The breaker is certified to DIN EN60898-1 and IEC 60947-2. It is halogen-free and silicon-free. Full compliance declarations (CE, UKCA, EAC) are available from Siemens; the product designation is for railway applications, indicating additional fire-smoke-toxicity testing per EN 45545.

MPN
5SY4401-7KK11