ABB S203-B100 Circuit Breaker, 3P

ABB S203-B100 is a three-pole miniature circuit breaker (MCB) with a B characteristic, designed to protect electrical installations with a rated current of 100 A. The device offers selective tripping in case of short circuits and overloads and is mountable on a TH35 rail, making it suitable for industrial and building applications.

Manufacturer: ABB — an international company specializing in low-voltage equipment and automation. The S203-B100 model is part of the S2C/S203 series, marked with the manufacturer's code 2CDS253001R0825 and covered by declarations of conformity and technical documentation provided by ABB.

Key Electrical Parameters

• Rated current (In): 100 A
• Tripping characteristic: B (according to IEC 60898-1)
• Operating voltage: 12 V AC (min) to 440 V AC (max including tolerance)
• Rated withstand current 50/60 Hz: acc. to IEC/EN 60664-1 440 V
• Rated Short-Circuit Capacity (AC): 6 kA
• Rated Conditional Short-Circuit Current (Inc): 10 kA (230 V), 20 kA (400 V)
• Rated ultimate breaking capacity (Icu): 10 kA (230 V), 20 kA (400 V)
• Power loss at rated conditions (per pole): 9.8 W
• Electrical endurance: 10,000 AC cycles
• Pollution degree: 3

Mechanical Parameters and Dimensions

• Number of poles: 3
• Type of drive/actuator: lever (toggle), marking I/O, insulating material black, possible sealing
• Type of terminals: screw, Failsafe Bi-directional Cylinder-lift Terminal
• Maximum tightening torque: 3 N·m
• Connection options: busbar 16/16 mm²; flexible wire 4 ... 35 mm²; rigid wire 2.5 ... 50 mm²; conductors 2.5 ... 50 mm²
• Dimensions (net): width 52.5 mm, height 88 mm, depth 69 mm
• Net weight: 0.42 kg
• Mechanical resistance: 20,000 mechanical cycles
• Protection degree: IP20 (housing), IP40 with cover
• Operating temperature: -25 ... +55 °C