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Siemens 5SY5203-7 — 2-Pole MCB (DIN Rail)

Siemens 5SY5203-7 SENTRON MCB, 2P C-Curve, 10 kA IEC, 15 kA

MPN5SY5203-7
Active

Siemens SENTRON 5SY5203-7, 2-pole miniature circuit breaker, C-curve, 10 kA breaking capacity per IEC/EN 60898-2, 15 kA DC per IEC 60947-2, 400 V AC / 440 V DC, 2 MW, IP20.

Siemens 5SY5203-7 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5SY5203-7 — Identification
ParameterValue
Product designationMiniature circuit breaker
Brand nameSENTRON
Application environmentuniversal current
5SY5203-7 — Electrical
ParameterValue
Number of poles2
5SY5203-7 — Protection
ParameterValue
Tripping characteristic classC
Overvoltage categoryIII
5SY5203-7 — 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
5SY5203-7 — Environmental
ParameterValue
Pollution degree3
5SY5203-7 — Specifications
ParameterValue
At AC rated value400 V
According to EN 60898 rated value10 kA
With single-phase operation at AC rated value440 V
Energy Limitation Class3

Product details

The 5SY5203-7: Width is 36 mm (2 modular units), depth 76 mm, height 90 mm, with a 70 mm installation depth behind the panel face. Combined top and bottom terminals simplify daisy-chaining in multi-pole groups.

Voltage and environmental ratings

Rated operating voltage 400 V AC (single- or multi-phase) and 440 V DC; maximum DC voltage 500 V. Frequency 50/60 Hz. Ambient temperature range -40 °C to +75 °C, with humidity derating: 95% RH up to 55 °C, 55% RH to 70 °C, 35% RH to 75 °C. Vibration resistance per IEC 60068-2-6: ±1 mm at 5–25 Hz, 50 m/s² at 25–150 Hz.

Certified to IEC/EN 60898-2 and UL 1077. Halogen-free and silicon-free construction; sealable for tamper-proof installations. Energy limitation class 3. Neutral conductor is not switched. For DC operation, observe polarity as marked. The manufacturer provides standard compliance documentation (RoHS, REACH, CE, UKCA) with the product.

Frequently asked questions

What is the breaking capacity of 5SY5203-7?

10 kA per IEC/EN 60898-2, and 15 kA at DC per IEC 60947-2. This covers most panel-feed and sub-distribution fault levels.

Will 5SY5203-7 drop into a panel designed for 5SY5202-6?

Yes — both are 2-pole SENTRON MCBs with the same 36 mm width, DIN-rail mount, and C-curve. The 5SY5203-7 has a higher breaking capacity (10 kA vs the 5SY5202-6's lower rating), so it is a functional upgrade without rewiring.

What compliance documentation does Siemens provide for 5SY5203-7?

Standard RoHS, REACH, CE, and UKCA declarations are provided with the product. The MCB is certified to IEC/EN 60898-2 and UL 1077.

How do I get current pricing and availability for 5SY5203-7?

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

MPN
5SY5203-7