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Siemens 5SY4108-8 — 1-Pole MCB (DIN Rail)

Siemens 5SY4108-8 SENTRON MCB, 1P, D-curve, 10 kA, 400 V AC

MPN5SY4108-8
Active

Siemens SENTRON 5SY4108-8 miniature circuit breaker, 1-pole, D-characteristic, 10 kA (EN 60898) / 20 kA (IEC 60947-2), 400 V AC, 18 mm wide, IP20, halogen-free.

$13.97Ref. price · indicative, final on quote
Siemens 5SY4108-8 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY4108-8 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
Pole design1P
Application suitabilityMechanical engineering / industry
5SY4108-8 — Electrical & Protection
ParameterValue
Tripping characteristic classD
Overvoltage categoryIII
5SY4108-8 — Mounting & Connection
ParameterValue
Mounting positionany
Fastening methodQuick assembly system
Combined terminal, topYes
Combined terminal, bottomYes
Width18 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Modular width units1
Torque, min.-40 °C
Torque, max.75 °C
SealableYes
5SY4108-8 — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Pollution degree3
Halogen-freeYes
Silicone-freeYes

Product details

Breaking capacity and standards coverage

Rated 10 kA according to EN 60898-1 and 20 kA according to IEC 60947-2 at 400 V AC. That IEC 60947-2 figure gives headroom for industrial fault levels where the lower EN rating would be marginal. For DC circuits, it carries 15 kA at 60 V DC (max 72 V DC) per IEC 60947-2. Under UL 1077 and CSA C22.2 No. 235, it is rated 5 kA.

Rated for ambient temperatures from -40 °C to 75 °C, with derating above 55 °C per the humidity curve (max 95% RH at 55 °C, tapering to 35% at 75 °C). Mounting position is any; the quick-assembly system clips onto a DIN rail. Sealable terminals (top and bottom combined) allow tamper-proofing in metering or critical circuits.

Frequently asked questions

How do I get current pricing and availability for 5SY4108-8?

Submit an RFQ through the storefront. Pricing and stock are confirmed at quote time through independent distribution channels; no live figures are published here.

What compliance documentation does the 5SY4108-8 carry?

It meets IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, and CSA C22.2 No. 235. RoHS and REACH compliance are standard for the SENTRON series.

Will 5SY4108-8 drop into a panel specified around 5SL6006-7 without rewiring?

Both are 1-pole, 18 mm wide MCBs on a DIN rail, so the mechanical fit is the same. The 5SY4108-8 uses a D-curve (high inrush tolerance) versus the 5SL6006-7's characteristic — verify that the load's startup profile matches D-curve before swapping. No rewiring needed if the terminal type and busbar arrangement are compatible.

MPN
5SY4108-8