ABBDS203NC
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RESIDUAL CURRENT CIRCUIT BREAKER WITH OVERCURRENT PROTECTION
DS203NC C20 AC300
SKU 2CSR256040R3204ABB DS203NC C20 AC300 is a residual current circuit breaker with overcurrent protection, rated at 20 A with a 3P+N configuration. Rated residual operating current: 300 mA. Tripping characteristic: C.
20 ARated current
3P+NPoles
300 mAResidual sensitivity
PRODUCT DATA
Technical specifications
Source: ABB English regional product catalog.
Verified September 07, 2026.
| Product ID | 2CSR256040R3204 |
|---|---|
| Catalog Description | Residual Current Circuit Breaker with Overcurrent Protection DS203NC - 3P+N - 300 mA - 20 A - C - Type AC - Instantaneous |
| Type of Residual Current | Type AC |
| Rated Current (In) | 20 A |
| Number of Poles | 3P+N |
| Number of Protected Poles | 3 |
| Tripping Characteristic | C |
| Rated Residual Current | 300 mA |
| Operating Characteristic | Instantaneous |
| Input Voltage Type | AC |
| Rated Operational Voltage | acc. to IEC 60898-1 415 V |
| Rated Short-Circuit Capacity | 6 kA |
| Rated Conditional Short-Circuit Current (Inc) | 10 kA |
| Rated Ultimate Short-Circuit Breaking Capacity (Icu) | 10 kA |
| Maximum Surge Current | 0.25 kA |
| Rated Insulation Voltage (Ui) | acc. to IEC/EN 60664-1 500 V |
| Rated Impulse Withstand Voltage (Uimp) | 4 kV |
| Rated Frequency (f) | 50/60 Hz |
| Standards | IEC 61009-1 IEC 61009-2-1 EN 61009-1 EN 61009-2-1 |
| Electrical Endurance | 10000 cycle |
| Mechanical Endurance | 20000 cycle |
| Power Loss | Total 11.8 W |
| Degree of Protection | IP2X |
| Pollution Degree | 2 |
| Ambient Air Temperature | Operation -25 … 55 °C |
| Connecting Capacity | Busbar 10 mm² Rigid 25 ... 25 mm² Flexible 25 ... 25 mm² |
| Rated Cross-Section | 1 - Solid-Core 25 … 25 mm² 4 - Multi-Wired 1 … 25 mm² |
| Product Net Width | 71 mm |
| Product Net Height | 85 mm |
| Product Net Depth / Length | 69 mm |
| Product Net Weight | 480 g |
For complete electrical ratings, applicable standards, connection requirements and installation instructions, consult the official ABB reference ↗.
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