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Siemens 5SY4205-8 — 2-Pole MCB (DIN Rail)

Siemens 5SY4205-8 SENTRON MCB, 2-pole, D-curve, 400 VAC, 10

MPN5SY4205-8
Active

Siemens SENTRON 5SY4205-8, 2-pole miniature circuit breaker, D tripping characteristic, 400 VAC, 10 kA (EN 60898-1), 35 kA (IEC 60947-2), 2 MW units.

$37.63Ref. price · indicative, final on quote
Siemens 5SY4205-8 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY4205-8 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentMechanical engineering / industry
5SY4205-8 — Electrical
ParameterValue
Number of poles2
5SY4205-8 — Protection
ParameterValue
Tripping characteristic classD
Overvoltage categoryIII
5SY4205-8 — Mechanical
ParameterValue
Modular width units2
Width36 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Min.-40 °C
Max.75 °C
Protection degree (IP)IP20, with connected conductors
5SY4205-8 — Environmental
ParameterValue
Pollution degree3
5SY4205-8 — Specifications
ParameterValue
At AC rated value400 V
According to EN 60898 rated value10 kA
With single-phase operation at AC rated value440 V

Product details

The Siemens 5SY4205-8 is a 2-pole miniature circuit breaker from the SENTRON family, built to IEC/EN 60898-1 and IEC 60947-2 / UL1077. Rated 400 V AC with a breaking capacity of 10 kA per EN 60898-1 and 35 kA per IEC 60947-2; DC rating is 15 kA per IEC 60947-2.

Mounting and integration notes

Fastens via the quick assembly system — no tools needed to clip onto the DIN rail. Accepts combined terminals top and bottom, so you can bus-bar the line side without extra adapters. IP20 with connected conductors — keep the panel door closed if you expect washdown. Vibration rated per IEC 60068-2-6: ±1 mm at 5 to 25 Hz, 50 m/s² at 25 to 150 Hz.

Frequently asked questions

Will the 5SY4205-8 drop into a panel specified around the 5SY4463-8?

Both are 2-pole SENTRON MCBs with the same 2-MW footprint (36 mm wide), so physical fit is identical. The 5SY4205-8 uses a D tripping characteristic; the 5SY4463-8 uses a different curve. Check the load's inrush profile before swapping — D-curve is for high-inrush loads, while the other curve may trip on motor starts.

What compliance documentation does the 5SY4205-8 carry?

It is certified to IEC/EN 60898-1, IEC/EN 60947-2, and UL1077. Halogen-free and silicon-free construction. Pollution degree 3, overvoltage category III. IP20 with connected conductors.

MPN
5SY4205-8