Compact, high-performance miniature circuit breaker for DC applications, offering reliable protection and easy installation.
Product ModelS202UDC-K40
Material Number2CDS272517R0557
Product ID79790
Stock on Request
Last updated: 8/29/2026
Key Features
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Feature1. Compact Design The ABB S202UDC-K40 is designed to be compact, making it ideal for space-constrained installations. Its dimensions (71 mm L x 35 mm W x 92 mm H) ensure it fits seamlessly into DIN rail systems, providing a high level of flexibility in system design.
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Feature2. High Performance This circuit breaker is engineered to handle high currents, with an amperage rating of 40 A and a voltage rating of 125 VDC. It is specifically designed to meet the stringent requirements of UL489, ensuring reliable performance in demanding DC applications.
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Feature3. Easy Installation The S202UDC-K40 features screw terminals, making installation straightforward and efficient. Its compact size and lightweight design facilitate quick and easy mounting on DIN rail systems, reducing installation time and effort.
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Feature4. Advanced Safety Features Equipped with advanced safety features, the S202UDC-K40 provides comprehensive protection against overcurrents and earth fault currents. It includes a differential trip indicator and a contact position indicator (CPI) for enhanced safety and reliability.
Technical Specifications
Detailed engineering parameters based on manufacturer documentation
Specifications may be subject to change without notice
Parameter
Value
Parameter
Value
Standards
UL 489
Tripping Characteristic
K
Rated Operational Voltage
125 V DC acc. to IEC 60898-1 250 V acc. to IEC 60947-2 125 V
Rated Insulation Voltage (Ui)
440 V
Rated Impulse Withstand Voltage (Uimp)
4 kV at 2000 m 5 kV at Sea Level 6.2 kV
Primary Rated Impulse Withstand Voltage
4 kV
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Feature5. Versatile Compatibility The ABB S202UDC-K40 is fully compatible with the System pro M compact range of accessories, including RCBOs and other DIN rail components. This compatibility ensures seamless integration into existing systems, making it a valuable addition to any electrical infrastructure.
