ABB S201-Z4 Miniature Circuit Breaker 1P Z 4A 6kA 2CDS251001R0338

The ABB S201-Z4 is a single-pole miniature circuit breaker with a Z tripping characteristic, optimised for protecting circuits with high inrush currents such as those found in lighting, control transformers, and semiconductor devices. Its 4 A rating and 6 kA breaking capacity make it suitable for residential and commercial distribution boards where precise protection is required.

Highlights

• 1-pole MCB with Z characteristic for sensitive equipment protection
• Rated current: 4 A, breaking capacity: 6 kA
• DIN rail mounting with screw terminals for conductors up to 25 mm²
• Toggle actuator for clear ON/OFF indication
• Operates at 230/400 V AC, 50/60 Hz

In daily use

Installation is straightforward on standard 35 mm DIN rails. The screw terminals accept rigid or flexible conductors up to 25 mm², with a tightening torque of 2.8 N·m. The device is rated for ambient temperatures from -25 °C to +55 °C, ensuring reliable operation in various environments.

Full specifications

• Product type: Miniature circuit breaker (MCB)
• Number of poles: 1P
• Tripping characteristic: Z
• Rated current (In): 4 A
• Rated short-circuit breaking capacity (Icn): 6 kA
• Rated voltage (Ue): 230/400 V AC
• Rated frequency: 50/60 Hz
• Mounting type: DIN rail
• Terminal type: Screw terminals
• Conductor cross-section (max): 25 mm²
• Tightening torque: 2.8 N·m
• Electrical endurance: 10000 cycles
• Mechanical endurance: 20000 cycles
• Degree of protection: IP20 (terminals), IP40 (enclosure with cover)
• Ambient operating temperature: -25 to +55 °C
• Energy limiting class: 3
• Power loss: 1.6 W per pole
• Actuator type: Toggle

Final note

With its Z characteristic, the S201-Z4 is particularly suited for protecting circuits with high inrush currents, ensuring both safety and continuity of service.