Eaton FAZ-S4/1 Miniature Circuit Breaker 1-Pole 4A S-Characteristic 10kA 278609

Electricians and panel builders protecting control circuits in industrial plants rely on the Eaton FAZ-S4/1 miniature circuit breaker. This 1-pole MCB handles 4 A rated current with S-characteristic tripping, making it suitable for circuits with high inrush currents such as transformers and solenoids. Mounted on a standard DIN rail, it provides reliable overload and short-circuit protection in a compact 17.5 mm width.

Key specifications

• Rated current: 4 A
• Number of poles: 1
• Tripping characteristic: S
• Rated switching capacity: 10 kA
• Rated voltage: 230/400 V AC
• Frequency: 50/60 Hz
• Mounting: DIN rail (EN 60715)
• Terminal capacity: 1–25 mm²
• Module width: 17.5 mm (1 module)

Why choose it

The S-characteristic provides delayed tripping on moderate overloads, preventing nuisance trips from short-duration current peaks. Screw terminals accept solid or stranded conductors up to 25 mm², ensuring secure connections. The thermal-magnetic release offers dependable protection for both overload and short-circuit conditions.

Ideal use cases

• Protection of control transformers and solenoid valves
• Circuits with high inrush currents in industrial control panels
• Branch circuit protection in commercial distribution boards

Good to know

The device is designed for use in industrial and commercial installations. It operates within a temperature range of -25 °C to +75 °C and has a mechanical life of 20,000 operations.