4400 and 4404 — the next step in circuit protection

Thermal Circuit Breakers

Schurter 4400 and 4404 series circuit breakers are thermal circuit breakers designed to protect devices and their circuits against the effects of overloads and short circuits. They feature a compact design, a wide range of current ratings, and a manual reset function after tripping. The breakers are intended for panel mounting in device enclosures, control cabinets, and machine housings, ensuring stable operation in power supply and control circuits of equipment.

The 4400/4404 series is characterized by high reliability, fast response to fault current increases, and excellent mechanical durability of the contacts. Thanks to the wide range of current variants, these models can be used both for protecting basic circuits in electronic and industrial equipment and for more demanding power supply lines with higher current consumption. Their design allows easy installation in panels and control cabinets, while clear markings on the housing facilitate identification during service and maintenance.

Common features of the 4400/4404 series:

• Thermal tripping mechanism – protection against overloads and short circuits in equipment.
• Compact design – suitable for panel mounting in devices and control cabinets.
• Fast tripping response – effectively limits the effects of faults, protecting devices and their circuits.
• Manual reset – easy restoration of operation after tripping.
• Mechanical durability – resistant to repeated switching cycles.
• Various rated currents – adaptation to load requirements depending on the device.
• Easy identification and operation – clear markings on the housing.

Applications:

• Protection of circuits in electronic and industrial equipment.
• Control and automation systems – protection of power supplies for controllers, I/O modules, and sensors.
• Auxiliary machine circuits and technological lines.
• Power supply of devices with higher current consumption – air conditioners, pumps, heaters, and low-power motors.

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