Skip to main content
Siemens 5SY4104-8 — 1-Pole MCB (DIN Rail)

Siemens SENTRON 5SY4104-8 MCB, 1P, D Curve, 10 kA

MPN5SY4104-8
Active

Siemens SENTRON 5SY4104-8, 1-pole miniature circuit breaker, D tripping characteristic, 10 kA per EN 60898, 35 kA per IEC 60947-2, 18 mm width, 76 mm depth.

$8.38Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

5SY4104-8 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
Pole design1P
Application suitabilityMechanical engineering / industry
5SY4104-8 — Electrical & Protection
ParameterValue
Tripping characteristic classD
Overvoltage categoryIII
5SY4104-8 — 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
5SY4104-8 — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Pollution degree3
Halogen-freeYes
Silicone-freeYes

Product details

It's rated 10 kA per IEC / EN 60898-1 and 35 kA per IEC 60947-2 — the 35 kA figure is what you use for industrial panel SCCR coordination, not the residential-grade 10 kA. At DC it breaks 15 kA at 60 V (72 V max) per IEC 60947-2, and 5 kA per UL 1077 / CSA C22.2 No. 235 for North American installations.

Depth is 76 mm (70 mm installation depth), which means it clears most standard enclosures without a deep-can. The combined terminal on top and bottom accepts copper conductors; sealable with a lead seal for tamper-proofing.

Ambient temperature range runs -40 °C to 75 °C, with humidity derating above 55 °C (95% RH up to 55 °C, 55% at 70 °C, 35% at 75 °C). Vibration resistance per IEC 60068-2-6: ±1 mm at 5 to 25 Hz, 50 m/s² at 25 to 150 Hz — holds up on a machine tool or conveyor line without nuisance trips. Halogen-free and silicon-free construction for clean-room or sensitive electronics environments.

Frequently asked questions

Will 5SY4104-8 drop into a panel specified around 5SY4140-7 without rewiring?

Both are 1-pole SENTRON MCBs in the same 18 mm width footprint with identical DIN-rail mounting, so they swap physically. Verify the tripping characteristic — the 5SY4140-7 carries a different curve and interrupting rating — before committing the BOM line.

MPN
5SY4104-8