Products Molded Case Circuit Breaker KFM3X Series Molded Case Circuit Breaker

KFM3X Series

Molded Case Circuit Breaker

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

KFM3X Series Molded Case Circuit Breaker (hereinafter referred to as the circuit breaker) incorporates advanced current-limiting technology and precision manufacturing, delivering a compact, modular design with high breaking capacity, zero arc flash, and environmental sustainability.

Designed for AC circuits up to 690V, 50/60Hz, with rated current up to 1600A, the KFM3X Series is primarily used for power distribution. Units rated 1600A and below also provide motor protection. They allow infrequent switching operations and motor starting under normal conditions.

Product Details
Technical Specifications
Functions and Features
Upgraded design with powerful functions
Electronic Series Product Controller
Newly upgraded LCD interface
The LCD interface enables intuitive data access.
A transparent flip cover design enhances safety and reliability through multiple insulation layers.
Low-power LCD technology with a key wake-up function is integrated for greater energy efficiency.
Comprehensive Four-Stage Protection
Full Series Products
Unified family design across the entire series
The next-generation 3rd series plastic circuit breaker products inherits a unified family design from our acclaimed existing range.
All electronic product controllers are uniformly positioned beneath the product, eliminating the need for side-mounted accessory backpack modules.
The entire series of residual current products supports Type A and AC protection configurations, with audio-visual alarm functions.
Complex Environments
Full regional verification to ensure reliable product operation

Installation altitude can reach up to 4500m

Suitable for plateau areas

Storage temperature down to -40°C

Operating temperature down to -40°C

Storage temperature up to 85°C

Operating temperature up to 70°C

Validated for extreme environments such as humidity, salt spray, oil mist, and mold to ensure reliable operation even in harsh conditions

Industry Applications
Multiple breaking capacities for versatile applications
Special Applications
100 (type-H)

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

as large power plants and heavy industries.

Heavy Industry Sector
70-100kA (type-M, type-H)

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
35-50kA (type-C, type-S)

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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