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Siemens 5SY7103-8CC — 1-Pole MCB (DIN Rail)

Siemens 5SY7103-8CC SENTRON MCB, 1P D 3 A, 30 kA IEC

MPN5SY7103-8CC

Siemens SENTRON 5SY7103-8CC, 1-pole miniature circuit breaker, D tripping characteristic, 3 A rated current, 400 V AC, 30 kA breaking capacity per IEC 60947-2, 18 mm width.

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

Specifications

5SY7103-8CC — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
Application suitabilityMechanical engineering / industry
5SY7103-8CC — Electrical & Protection
ParameterValue
Tripping characteristic classD
Overvoltage categoryIII
5SY7103-8CC — Mounting & Connection
ParameterValue
Mounting positionany
Combined terminal, topYes
Combined terminal, bottomYes
Width18 mm
Height90 mm
Depth76 mm
Installation depth70 mm
SealableYes
5SY7103-8CC — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Halogen-freeYes
Silicone-freeYes

Product details

Don't spec this for lighting or general-purpose resistive loads; those want a B or C curve. Under UL 1077 and CSA C22.2 No.235 it's rated 5 kA, so if your BOM calls for UL 489 listing, verify the application; this is a supplementary protector by North American standards.

Single width unit (18 mm) — fits a standard 1P slot. Installation depth 70 mm; overall depth 76 mm. Tightening torque 2.5–3.5 N·m on the screw terminals. Sealable, touch-protected, halogen-free and silicon-free. Ambient temperature range -25 to +55 °C; storage down to -40 °C. IP20 with conductors connected — fine for enclosed panels, not for open washdown zones.

Frequently asked questions

How do I get current pricing and availability for 5SY7103-8CC?

Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through independent distribution channels.

Will 5SY7103-8CC drop into a panel specified around 5SY3132-6 without rewiring?

Same SENTRON 1P form factor, same 18 mm width, same DIN-rail mount — mechanical fit is identical. The terminal range (0.75–35 mm²) and tightening torque (2.5–3.5 N·m) also match. No rewiring needed for the physical swap, but the 3 A vs 32 A rating means the circuit protection changes entirely.

MPN
5SY7103-8CC