ABB S203M-C50NA: Reliable 50A miniature circuit breaker with delayed thermal and electromechanical tripping mechanisms, suitable for residential, commercial, and industrial use.
Product ModelS203M-C50NA
Material Number2CDS273103R0504
Product ID77805
Stock on Request
Last updated: 8/29/2026
Key Features
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1. Comprehensive ProtectionThe ABB S203M-C50NA offers dual protection mechanisms: delayed thermal tripping for overload protection and electromechanical tripping for short circuit protection, ensuring comprehensive safety in your electrical system.
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2. Versatile ApplicationsDesigned to meet the needs of various environments, this MCB is suitable for residential, commercial, and industrial applications, making it a versatile solution for diverse electrical setups.
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3. Compliance with International StandardsThe S203M-C50NA complies with IEC/EN 60898-1 and IEC/EN 60947-2 standards, ensuring it meets the highest international safety and performance requirements.
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4. Efficient DesignWith a bottom-fitting auxiliary contact, this MCB can save up to 50% space, making it ideal for installations where space is limited. Its compact design also enhances its usability in modular DIN rail systems.
Technical Specifications
Detailed engineering parameters based on manufacturer documentation
Specifications may be subject to change without notice
Parameter
Value
Parameter
Value
Standards
IEC/EN 60898-1 CSA 22.2 No. 235 IEC/EN 60947-2 UL 1077
Tripping Characteristic
C
Rated Operational Voltage
acc. to IEC 60898-1 400 V AC acc. to IEC 60898-1 400 V acc. to IEC 60947-2 440 V AC
Operational Voltage
Maximum (Incl. Tolerance) 440 V AC Minimum 12 V AC Minimum 12 V DC
Rated Insulation Voltage (Ui)
acc. to IEC/EN 60664-1 440 V
Rated Impulse Withstand Voltage (Uimp)
5
5. Reliability and DurabilityConstructed with high-quality materials, the S203M-C50NA is built to last. It can withstand ambient temperatures ranging from -25°C to +55°C and has a robust electrical endurance of up to 20,000 cycles, ensuring reliable operation over time.
4 kV at 2000 m 5 kV at Sea Level 6.2 kV
Dielectric Test Voltage
50/60 Hz-1 min: 2 kV
Input Voltage Type
AC
Rated Current (In)
50 A
Rated Short-Circuit Capacity
(AC) 10 kA (230 V AC) 10 kA (400 V AC) 10 kA (400 V) 10 kA
