Products Miniature Circuit Breaker KFB3 Series Miniature Circuit Breakers

KFB3 Series

Miniature Circuit Breaker

Focusing on mid-to-high-end power distribution market solutions

KFB3 Series Miniature Molded Case Circuit Breakers feature a compact and aesthetic design, lightweight, excellent and reliable performance, high breaking capacity, rapid tripping, and DIN rail installation. The housing and components are made from high-grade flame-retardant and impact-resistant plastics for extended service life. Designed for AC circuits up to 50/60Hz with rated voltage of 230/400V and rated current up to 125A, the KFB3 series provides overload and short-circuit protection, and is also suitable for infrequent switching operations and isolation during maintenance.

Product Details
Product Introduction
The KF3 Series Mini Circuit Breakers include the following models: KFD3-32, KFB3-63, KFB3-125 series mini circuit breakers; KFD3L-32, KFB3L-63, KFB3L-100 series mini residual current circuit breakers; KFB3-63Z series mini DC circuit breakers; and KFG3 series mini isolation switches. These devices provide overload protection, short circuit protection, and residual current protection while also functioning as isolation and control devices.
They feature a modular structure, which enables flexible configurations and full cross-series compatibility.
Product Introduction
The KF3 Series Mini Circuit Breakers include the following models: KFD3-32, KFB3-63, KFB3-125 series mini circuit breakers; KFD3L-32, KFB3L-63, KFB3L-100 series mini residual current circuit breakers; KFB3-63Z series mini DC circuit breakers; and KFG3 series mini isolation switches. These devices provide overload protection, short circuit protection, and residual current protection while also functioning as isolation and control devices.
Technical Specifications
Industry Applications
Multiple breaking capacities for versatile applications
Special Applications

Suitable for demanding environments with high short-circuit currents, such

as large power plants and heavy industries.

Heavy Industry Sector

Suitable for high-performance applications with high short-circuit current requirements, such as industrial production lines, critical power equipment, and heavy industry sectors.

Construction Industry

Suitable for conventional applications with low short-circuit currents, such as residential buildings, schools, hospitals, infrastructure, and factory lighting distribution areas.

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