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KFine offers a complete portfolio of low-voltage power distribution and motor control products for industrial, commercial, infrastructure, and utility applications. The range includes air circuit breakers, molded case circuit breakers, miniature circuit breakers, contactors, thermal relays, and automatic transfer switching equipment designed for reliable protection, control, and power continuity.
With broad current coverage, multiple breaking-capacity options, and configurations for a wide range of operating environments, KFine products support panel builders, OEMs, power distribution system integrators, and end users seeking dependable low-voltage solutions.
- Offers a range of AC and DC products, with voltages covering AC 400V to AC 1500V, and up to DC 1500V
- Broad portfolio covering protection, switching, control, and transfer applications
- Wide range of current ratings and breaking capacities for diverse system requirements
- Suitable for industrial plants, commercial buildings, utilities, and OEM equipment
- Designed for dependable protection performance and long service life
- Flexible product selection for main distribution, branch protection, motor control, and backup power transfer
AIR CIRCUIT BREAKERS (ACB)KFW3, KFW3HU and KFW5 series air circuit breakers are designed for high-current power distribution systems requiring strong breaking capacity, reliable selectivity, and long service life. They are suitable for main incoming, tie, and large-capacity distribution applications. Work voltage up to AC1500V; Current ratings up to 8000 A; 3P and 4P configurations; High short-circuit breaking performance; Suitable for main switchboards and heavy-duty distribution systems
MOLDED CASE CIRCUIT BREAKERS (MCCB)KFM5, KFM5E, KFM3XE, KFM3X, and KFM3HU, KFM5HU, KFM3ZHU series molded case circuit breakers provide dependable overload and short-circuit protection across a wide range of current ratings and breaking capacities. They are well suited for panel builders, OEM equipment, commercial buildings, industrial distribution systems, and New energy power generation. Available in thermal-magnetic and electronic trip configurations; Wide selection of frame sizes and breaking-capacity classes; Suitable for feeder, motor, and branch protection applications
MINIATURE CIRCUIT BREAKERS (MCB)KF series miniature circuit breakers provide compact and reliable branch circuit protection for residential, commercial, and light industrial applications. Rated current range from 1 A to 125 A; Multiple breaking-capacity options; Compact design for panel and final distribution applications
CONTACTORS AND THERMAL RELAYSKFC3H contactors and KFR3H thermal relays support dependable motor starting, switching, and overload protection in motor control systems. Designed for motor control and starter assemblies; Multiple current ratings and relay ranges; Flexible installation options
AUTOMATIC TRANSFER SWITCHING EQUIPMENT (ATSE)KFP3H series ATSE products provide safe and reliable power source transfer for applications where continuity of supply is critical, including commercial buildings, industrial facilities, and backup power systems. Rated current range up to 6300 A; 3P and 4P configurations available; Suitable for automatic source transfer applications
DC ISOLATOR SWITCH (DC IS)KFW2GZ, KFW3GZ and KFW5GZ series DC isolator switch are designed for high-voltage distribution in photovoltaic storage conversion systems, requiring strong breaking capacity, reliable selectivity, and long service life. They are suitable for Photovoltaic Energy Storage Converter System. Work voltage up to DC1500V; Current ratings up to 4000 A; 2P,3P and 4P configurations; High short-time withstand current
| Product Family | Current Range | Key Voltage Range | Key Notes |
|---|---|---|---|
| KFW3 Series ACB | 400 A to 8000 A | AC 400 to 690 V | Utilization category B, high breaking-capacity coverage |
| KFW3HU Series ACB | 400 A to 8000 A | AC 800 to 1500 V | Utilization category B, high breaking-capacity coverage, high voltage |
| KFW5 Series ACB | 200 A to 7500 A | AC 380 to 690 V | Multiple breaking-capacity classes and compact high-current design |
| KFM5 / KFM5E Series MCCB |
10 A to 630 A | AC 400 / 690 V | Available with electronic trip options on selected models, thermomagnetic adjustable, double contact |
| KFM3XE / KFM3X Series MCCB |
10 A to 1600 A | AC 400 to 690 V | Broad application coverage for feeder and branch protection |
| KFM3HU Series MCCB |
63A to 630 A | DC 1000 to 1500 V | Broad application coverage for feeder and branch protection, DC system protection |
| KF Series MCB | 1 A to 125 A | Low-voltage distribution | Compact branch protection devices |
| KFC3H / KFR3H | 0.16 A to 95 A contactor / relay ranges |
Motor control systems | For switching and overload protection |
| KFP3H Series ATSE | 20 A to 6300 A | AC 400 V | Automatic source transfer for continuity-critical loads |
| KFW2GZ / KFW3GZ / KFW5GZ Series DC IS |
400A to 4000A | DC 750 to 1500 V | High voltage, high short-time withstand current |
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