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

Siemens 5SY6103-8CC SENTRON MCB, D-Curve 3A 1P, 6kA

MPN5SY6103-8CC

Siemens SENTRON 5SY6103-8CC, D-curve miniature circuit breaker, 3 A rated, 1-pole, 6 kA breaking capacity per EN 60898, 5 kA per UL 1077.

Siemens 5SY6103-8CC datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY6103-8CC — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
Pole design1P
Application suitabilityMechanical engineering / industry
5SY6103-8CC — Electrical & Protection
ParameterValue
Tripping characteristic classD
Rated value (EN 60898)6 kA
Overvoltage categoryIII
5SY6103-8CC — 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
5SY6103-8CC — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Pollution degree3
Halogen-freeYes
Silicone-freeYes

Product details

D-curve MCB for inductive and motor-start loads

The Siemens 5SY6103-8CC is a SENTRON miniature circuit breaker with a D tripping characteristic, rated 3 A at 35 °C on a 1-pole (1P) design. Breaking capacity is 6 kA per EN 60898 and 5 kA per UL 1077 / CSA C22.2 No. 235, which covers most industrial panel secondary circuits and machine-tool feeders.

Temperature derating — the real ampacity at panel ambient

The 3 A rating holds at 35 °C. At 40 °C it derates to 2.76 A, at 45 °C to 2.62 A, at 50 °C to 2.49 A, and at 55 °C to 2.34 A. The breaker also carries a humidity spec: max 95% RH up to 55 °C, tapering to 35% RH at 75 °C.

Frequently asked questions

What is the breaking capacity of 5SY6103-8CC?

6 kA per EN 60898 and 5 kA per UL 1077 / CSA C22.2 No. 235.

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

Both are 1-pole SENTRON MCBs on the same 18 mm modular DIN-rail footprint, so the mechanical fit is identical. The difference is rating: 5SY6103-8CC is a 3 A D-curve; 5SY6140-6CC is a 40 A C-curve. The wiring and busbar must match the load current — no rewiring of the DIN rail or enclosure is needed, but the branch circuit protection rating changes.

Where can I buy 5SY6103-8CC and how is it quoted?

Sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — no stock count or price is published here.

MPN
5SY6103-8CC