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Siemens 5SY8105-8 — 1-Pole MCB (DIN Rail)

Siemens 5SY8105-8 SENTRON MCB, 1P, D Curve, 0.5 A, 70 kA IEC

MPN5SY8105-8
Active

Siemens SENTRON 5SY8 series, miniature circuit breaker, 1-pole, D tripping characteristic, 0.5 A rated current, 70 kA breaking capacity per IEC 60947-2, 400 V AC, IP20.

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

Specifications

5SY8105-8 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
Application suitabilityMechanical engineering / industry
5SY8105-8 — Electrical & Protection
ParameterValue
Tripping characteristic classD
Overvoltage categoryIII
5SY8105-8 — Mounting & Connection
ParameterValue
Mounting positionany
Combined terminal, topYes
Combined terminal, bottomYes
Width18 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Torque, min.-40 °C
Torque, max.75 °C
SealableYes
5SY8105-8 — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Pollution degree3
Halogen-freeYes
Silicone-freeYes

Product details

Siemens SENTRON 5SY8105-8 — D-curve MCB, 0.5 A, 70 kA

The Siemens SENTRON 5SY8105-8 is a 1-pole miniature circuit breaker with a D tripping characteristic, rated at 0.5 A and 400 V AC. The D curve (10–20× In) avoids nuisance tripping on those starting currents.

DC breaking capacity is 15 kA at 72 V, covering control-circuit and battery-backed loads. For UL 1077 / CSA C22.2 No. 235 applications, the rating is 5 kA — check the local code. The D tripping characteristic (10–20× In) is sized for loads with high inrush, such as small motors, transformers, or solenoid banks. Rated frequency is 50/60 Hz. Temperature range -40 to 75 °C; humidity derating applies above 55 °C per the spec.

Frequently asked questions

Where can I buy 5SY8105-8 and how do I get a price?

The 5SY8105-8 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What is 5SY8105-8's listed depth (76 mm) on this component line?

The depth is 76 mm, with an installation depth of 70 mm.

What is 5SY8105-8's listed width (18 mm) on this component line?

The width is 18 mm, which is 1 width unit on DIN rail.

What compliance documentation does this brand provide for 5SY8105-8 (RoHS, REACH, UL, IEC)?

The part carries IEC 60947-2 certification (70 kA), UL 1077 and CSA C22.2 No. 235 (5 kA). It is halogen-free and silicon-free, and the SENTRON brand provides standard compliance documentation including RoHS and REACH declarations.

MPN
5SY8105-8