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Siemens 5SY4125-8CC11 — 1-Pole MCB (DIN Rail)

Siemens 5SY4125-8CC11 SENTRON MCB, 25 A, 1P, D Curve, 10 kA

MPN5SY4125-8CC11

Siemens SENTRON 5SY4125-8CC11 miniature circuit breaker, 1-pole, D characteristic, 25 A rated current, 10 kA breaking capacity per EN 60898, for railway applications.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

5SY4125-8CC11 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Number of poles1
Pole design1P
Application suitabilityMechanical engineering / industry
5SY4125-8CC11 — Electrical & Protection
ParameterValue
Tripping characteristic classD
Rated value (EN 60898)10 kA
Overvoltage categoryIII
5SY4125-8CC11 — 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
5SY4125-8CC11 — Environmental
ParameterValue
IP protection classIP20, with connected conductors
Pollution degree3
Halogen-freeYes
Silicone-freeYes

Product details

Rated 25 A at 35 °C and 22.98 A at 40 °C — the 40 °C figure is the one to use for a typical enclosed panel. At 50 °C it derates to 20.72 A, and at 60 °C to 18.22 A. Vibration resistance per IEC 60068-2-6: ±1 mm at 5 to 25 Hz and 50 m/s² at 25 to 150 Hz. That is the railway-relevant spec — it stays closed under the mechanical shock of a passing train or a track-side cabinet.

The quick assembly system means it clips in and out without tools — useful for panel builders who need to swap units during commissioning.

Frequently asked questions

What is the breaking capacity of 5SY4125-8CC11?

10 kA per EN 60898 at the rated voltage. That is the standard breaking capacity for a residential/commercial MCB; for higher fault levels, verify coordination with the upstream device.

Where can I buy 5SY4125-8CC11 and how is it quoted?

We source the 5SY4125-8CC11 to order against an RFQ. Availability and current pricing are confirmed at quote time through our independent distribution network.

Will 5SY4125-8CC11 drop into a panel specified for 5SY4125-7CV?

Both are 1-pole SENTRON MCBs with the same 18 mm width and DIN-rail mounting. The 5SY4125-8CC11 is a D-curve 25 A unit for railway applications; the 5SY4125-7CV is a C-curve variant. They share the same footprint and terminal layout, so a direct swap is possible if the tripping characteristic and current rating match the circuit requirements.

MPN
5SY4125-8CC11