S203MR-K0.3
Product ID:78121
Updated: 2026/4/5
Key Features
- 1Provide up to 10 kA short-circuit interrupt rating for maximum circuit protection. 2、Build with a robust IP20 enclosure for durability in harsh conditions. 3、Mount easily on DIN rails for flexible and quick installation. 4、Meet UL, CSA, IEC, and CE standards for global compliance and safety. 5、Operate with a fast breaking time of 2.3–2.5 ms for rapid emergency response.
Technical Specifications
Detailed engineering parameters
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Standards | CSA 22.2 No. 235 IEC/EN 60947-2 UL 1077 | Tripping Characteristic | K |
| Rated Operational Voltage | acc. to IEC 60898-1 400 V AC acc. to IEC 60898-1 400 V acc. to IEC 60947-2 400 V AC | Rated Insulation Voltage (Ui) | acc. to IEC/EN 60664-1 440 V |
| Rated Impulse Withstand Voltage (Uimp) | 4 kV at 2000 m 5 kV at Sea Level 6.2 kV | Input Voltage Type | AC |
| Rated Current (In) | 0.3 A | Rated Short-Circuit Capacity | (230 V AC) 10 kA (400 V AC) 10 kA |
| Rated Ultimate Short-Circuit Breaking Capacity (Icu) | (230 V AC) 10 kA (400 V AC) 15 kA (400 V) 6 kA | Rated Conditional Short-Circuit Current (Inc) | (230 V) 10 kA (400 V) 10 kA |
| Rated Service Short-Circuit Breaking Capacity (Ics) | (400 V AC) 11.2 kA | Rated Frequency (f) | 50 / 60 Hz |
| Energy Limiting Class | 3 | Number of Protected Poles | 3 |
| Number of Poles | 3 | Overvoltage Category | III |
| Accessories Available | Yes | Connecting Capacity | Flexible with Ferrule 0.75 ... 25 mm² Flexible 0.75 ... 25 mm² Flexible 0.75 ... 25 mm² Rigid 0.75 ... 35 mm² Stranded 0.75 ... 35 mm² |
| Terminal Type | Double Clamp | Ambient Air Temperature | Operation -25 ... +55 °C |
| Degree of Protection | IP20 | Pollution Degree | 3 |
| Interrupting Rating acc. to UL1077 | (480Y / 277 V AC) 10 kA | Width in Number of Modular Spacings | 3.0 |
| Product Net Width | 52.5 mm | Product Net Height | 100 mm |
| Product Net Depth / Length | 71 mm | Product Net Weight | 0.42 kg |
| Built-In Depth (t2) | 69 mm | ETIM 8 | EC000042 - Miniature circuit breaker (MCB) |
| ETIM 9 | EC000042 - Miniature circuit breaker (MCB) | WEEE Category | 5. Small Equipment (No External Dimension More Than 50 cm) |
| WEEE B2C / B2B | Business To Business | CN8 | 8536 20 10 |
| UNSPSC | 39121603 | eClass | V11.0 : 27141901 |
| IDEA Granular Category Code (IGCC) | 4899 >> Miniature circuit breaker (MCB) screw-in model | Manufacturer ID | 2CDS273437R0117 |
Specifications may be subject to change without notice