ABB S203M-C20NA: High-performance, current-limiting MCB with delayed thermal and electromechanical tripping. Ideal for residential, commercial, and industrial use.
Product ModelS203M-C20NA
Material Number2CDS273103R0204
Product ID79289
Stock on Request
Last updated: 8/29/2026
Key Features
1
1. Current Limiting Design DescriptionThe ABB S203M-C20NA features a current-limiting design that reduces the impact of short circuits, ensuring minimal damage to the electrical system and reducing downtime.
2
2. Dual Tripping Mechanisms DescriptionEquipped with both delayed thermal and electromechanical tripping mechanisms, this MCB provides comprehensive protection against overload and short circuits, ensuring the safety of your electrical installation.
3
3. Wide Application Range DescriptionSuitable for residential, commercial, and industrial applications, the S203M-C20NA offers flexibility in its usage, making it a versatile solution for various electrical needs.
4
4. High Breaking Capacity DescriptionWith a breaking capacity of up to 10 kA at 230/400 V AC, this MCB can handle high fault currents, providing reliable protection in critical electrical 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. Compliance with International Standards DescriptionThe ABB S203M-C20NA complies with IEC/EN 60898-1 and IEC/EN 60947-2, ensuring it meets the stringent safety and performance standards required for electrical installations worldwide.
6
6. Easy Installation and Maintenance DescriptionDesigned for easy installation and maintenance, the S203M-C20NA features a compact design and accessible terminals, making it simple to integrate into existing electrical systems and perform routine checks.
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)
20 A
Rated Short-Circuit Capacity
(AC) 10 kA (230 V AC) 10 kA (400 V AC) 10 kA (400 V) 10 kA
