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Siemens 5SY6103-8 — 1-Pole MCB (DIN Rail)

Siemens 5SY6103-8 SENTRON MCB, 1P D 3A, 6kA/30kA

MPN5SY6103-8

Siemens SENTRON 5SY6 series miniature circuit breaker, 1-pole, D tripping characteristic, 3 A rated current, 400 V AC, 6 kA (EN 60898) / 30 kA (IEC 60947-2) breaking capacity, 18 mm width, IP20.

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

Specifications

5SY6103-8 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
Application suitabilityMechanical engineering / industry
5SY6103-8 — Electrical & Protection
ParameterValue
Tripping characteristic classD
Rated value (EN 60898)6 kA
Overvoltage categoryIII
5SY6103-8 — Mounting & Connection
ParameterValue
Mounting positionany
Combined terminal, topYes
Combined terminal, bottomYes
Width18 mm
Height90 mm
Depth76 mm
Installation depth70 mm
SealableYes
5SY6103-8 — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Halogen-freeYes
Silicone-freeYes

Product details

Siemens 5SY6103-8 — D-curve MCB for inductive and motor loads

The Siemens 5SY6103-8 is a 1-pole miniature circuit breaker from the SENTRON 5SY6 series, rated 3 A at 400 V AC with a D tripping characteristic. Breaking capacity is 6 kA per EN 60898 for general distribution, and 30 kA per IEC 60947-2 for industrial panel duty — the higher figure is the one that governs SCCR coordination in a 400 V switchboard. IP20 with conductors connected; suitable for ambient temperatures from -25 to +55 °C and storage down to -40 °C.

Combined terminals top and bottom simplify busbar or ring-tongue wiring. Touch protection is built in — no additional finger-safe shrouds needed for the line side. Halogen-free and silicon-free construction suits clean-room or food-processing environments where outgassing matters. Rated frequency 50/60 Hz. DC rating is 72 V maximum per pole, with a DC breaking capacity of 15 kA per IEC 60947-2; UL 1077 / CSA C22.2 No. 235 rating is 5 kA at AC. Compliance documentation (RoHS, REACH, CE) is available from the manufacturer.

Frequently asked questions

Where can I buy 5SY6103-8 and how do I get a price?

The 5SY6103-8 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What is 5SY6103-8's listed depth?

The 5SY6103-8 has a depth of 76 mm (installation depth 70 mm).

What is 5SY6103-8's listed solid conductor range?

The solid conductor range is 0.75 to 35 mm². Stranded range is the same.

Will 5SY6103-8 drop into a panel specified around 5SY6140-6CC without rewiring?

Both breakers share the same 18 mm width, DIN-rail mount, and terminal range, so mechanical fit is identical. However, the electrical ratings differ — verify that the 3 A D-curve matches the circuit requirements before substituting.

What compliance documentation does Siemens provide for 5SY6103-8?

The 5SY6103-8 carries CE marking, is rated per EN 60898 and IEC 60947-2, and is UL 1077 / CSA C22.2 No. 235 listed. RoHS and REACH declarations are available from the manufacturer.

MPN
5SY6103-8