Skip to main content
Log in
Siemens 5SY5203-7CC11 — 2-Pole MCB (DIN Rail)

Siemens 5SY5203-7CC11 SENTRON MCB, 2P C 3A, 10kA DC, Railway

MPN5SY5203-7CC11

Siemens SENTRON 5SY5203-7CC11 miniature circuit breaker, 2-pole, C-curve, 3 A, 10 kA DC at 440 V, rated for railway applications, IP20.

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

Specifications

5SY5203-7CC11 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentRailway
5SY5203-7CC11 — Electrical
ParameterValue
Number of poles2
5SY5203-7CC11 — Protection
ParameterValue
Tripping characteristic classC
Overvoltage categoryIII
5SY5203-7CC11 — Mechanical
ParameterValue
Modular width units2
Width36 mm
Height90 mm
Depth76 mm
Installation depth70 mm
Mounting positionany
Min.-40 °C
Max.75 °C
Protection degree (IP)IP20, with connected conductors
5SY5203-7CC11 — Environmental
ParameterValue
Pollution degree3

Product details

Railway-rated construction

This breaker is explicitly listed for railway operation, with vibration resistance tested to IEC 60068-2-6: ±1 mm at 5 to 25 Hz and 50 m/s² at 25 to 150 Hz. The wide ambient temperature range of -40 °C to 75 °C and humidity tolerance (max 95% at 55 °C, derating to 35% at 75 °C) suit it for unheated railcar enclosures or wayside cabinets.

Installation depth is 70 mm, total depth 76 mm. Combined top and bottom terminals simplify daisy-chaining, and the sealable design allows lockout-tagout compliance.

Frequently asked questions

What is the DC breaking capacity of 5SY5203-7CC11?

It is rated 10 kA at 440 V DC per IEC 60947-2, with a maximum DC operating voltage of 500 V.

Will 5SY5203-7CC11 drop into a panel specified around 5SY5250-7 without rewiring?

Yes, both share the same 36 mm width, 76 mm depth, DIN-rail mounting, and 2-pole form factor. The 5SY5250-7 is a higher-current variant (50 A) with the same mechanical footprint, so a swap at 3 A requires no panel modification.

Where can I buy 5SY5203-7CC11?

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

MPN
5SY5203-7CC11