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Siemens 5SY7103-7 — 1-Pole MCB (DIN Rail)

Siemens 5SY7103-7 SENTRON MCB, 1P C-Char, 15/40 kA, 18 mm

MPN5SY7103-7
Active

Siemens SENTRON 5SY7103-7, 1-pole miniature circuit breaker, C characteristic, 15 kA per EN 60898 / 40 kA per IEC 60947-2, 400 V AC, 18 mm width, IP20.

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

Specifications

5SY7103-7 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
Pole design1P
Application suitabilityMechanical engineering / industry
5SY7103-7 — Electrical & Protection
ParameterValue
Tripping characteristic classC
Energy limitation class3
Overvoltage categoryIII
5SY7103-7 — 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
5SY7103-7 — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Pollution degree3
Halogen-freeYes
Silicone-freeYes

Product details

It carries a 15 kA interrupting rating per EN 60898 and a 40 kA rating per IEC 60947-2, so it handles high-fault-current panels without cascading upstream — the 40 kA figure is the one that matters for industrial switchgear coordination. Rated 400 V AC, 50/60 Hz, with a DC rating of 60 V (max 72 V).

Panel Fit & Integration

Certified to IEC / EN 60898-1, IEC / EN 60947-2, and UL 1077 / CSA C22.2 No. 235. The UL 1077 rating is 5 kA — that's the supplementary-protector limit for North American panels.

Frequently asked questions

Where can I buy 5SY7103-7 and get a price?

This part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.

What is the closest functional second-source for 5SY7103-7?

The 5SY4101-7CV is a 1-pole C-characteristic MCB in the same SENTRON family, but it has a lower interrupting rating (6 kA per EN 60898) and a narrower temperature range. It will drop into the same DIN-rail footprint (18 mm) without rewiring, but verify the fault-current requirement of your panel — the 5SY7103-7's 15/40 kA rating is substantially higher.

What compliance documentation does Siemens provide for 5SY7103-7?

The breaker is certified to IEC / EN 60898-1, IEC / EN 60947-2, and UL 1077 / CSA C22.2 No. 235. It is halogen-free and silicon-free. Standard RoHS and REACH declarations are available from the manufacturer.

MPN
5SY7103-7