ABB SX201-B6 6 A Single-Pole B-Curve Miniature Circuit Breaker, 230/400 V AC, 6 kA 2CDS251003R0065

The ABB SX201-B6 stands out in the compact modular circuit protection segment by pairing a genuine 6 kA breaking capacity with a precise B-curve magnetic trip, making it a dependable first line of defence for residential and light commercial distribution boards. Unlike generic alternatives, this miniature circuit breaker (MCB) is engineered to the full IEC/EN 60898-1 standard, delivering consistent performance over 20,000 electrical and mechanical operating cycles. Its single-pole, 6 A rating is ideal for protecting lighting circuits, control wiring, and low-power socket outlets where nuisance tripping must be avoided while still ensuring rapid disconnection under fault conditions.

Highlights

• Rated current 6 A, 1-pole, B tripping characteristic for standard inductive loads
• Breaking capacity 6 kA at 230/400 V AC, suitable for most domestic and commercial installations
• DIN rail mounting with screw terminals accepting rigid conductors up to 25 mm²
• IP20 degree of protection, energy limiting class 3, and wide operating temperature range from -25 °C to +55 °C
• Complies with IEC/EN 60898-1, ensuring safety and interoperability with standard distribution equipment

In daily use

The SX201-B6 installs quickly onto standard 35 mm DIN rails and occupies just one module width (18 mm). Its screw terminals provide a secure connection for both rigid and flexible conductors, reducing the risk of loose connections over time. The B-curve magnetic trip is calibrated to respond to short-circuit currents between 3 and 5 times the rated current, making it well-suited for circuits with moderate inrush currents such as LED lighting arrays or small transformers. With a mechanical endurance of 20,000 operations, this breaker will outlast many lower-cost alternatives, and its clear ON/OFF indication simplifies troubleshooting.

Full specifications

• Brand: ABB
• Model: SX201-B6
• MPN: 2CDS251003R0065
• EAN: 4053546052480
• Number of poles: 1P
• Tripping characteristic: B
• Rated current (In): 6 A
• Rated voltage (Ue): 230/400 V AC
• Rated breaking capacity (Icn): 6 kA
• Frequency: 50/60 Hz
• Mounting type: DIN rail
• Terminal type: Screw terminals
• Terminal capacity (rigid): 0.75 - 25 mm²
• Terminal capacity (flexible): 0.75 - 16 mm²
• Degree of protection: IP20
• Electrical endurance: 20,000 cycles
• Mechanical endurance: 20,000 cycles
• Standards: IEC/EN 60898-1
• Energy limiting class: 3
• Operating temperature range: -25 to +55 °C
• Insulation voltage (Ui): 440 V
• Rated impulse withstand voltage (Uimp): 4 kV

Final note

For installers and panel builders who value proven reliability and straightforward integration, the ABB SX201-B6 delivers the performance expected from a global leader in electrical protection, without unnecessary complexity or cost.