"ABB S203MR-K0.3: 3-pole, 0.3A miniature circuit breaker, UL 1077 compliant, perfect for reliable electrical protection and efficient operation."
Product ModelS203MR-K0.3
Material Number2CDS273437R0117
Product ID78569
Stock on Request
Last updated: 8/29/2026
Key Features
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1. Reliable Protection\"The ABB S203MR-K0.3 offers reliable protection against short circuits, ensuring the safety of your electrical system with its high-rated conditional short-circuit current (Inc) of 11.2 kA at 400 V AC.\"
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2. Compliance with Standards\"Compliant with UL 1077, CSA 22.2 No. 235, and IEC/EN 60947-2 standards, this miniature circuit breaker meets the highest industry standards for safety and performance.\"
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3. Efficient Operation\"Designed for efficient operation, the S203MR-K0.3 operates within a wide ambient air temperature range of -25°C to +55°C, making it suitable for various environmental conditions.\"
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4. Versatile Connectivity Options\"With flexible and rigid cable lugs available, the S203MR-K0.3 offers versatile connectivity options, accommodating cables from 0.75 mm² to 35 mm², ensuring easy installation and maintenance.\"
Technical Specifications
Detailed engineering parameters based on manufacturer documentation
Specifications may be subject to change without notice
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
5
5. Enhanced Safety Features\"Equipped with overvoltage category protection, this miniature circuit breaker provides enhanced safety features, ensuring that your electrical system operates within safe voltage limits.\"
