CKJ5 1000A Three-Pole Vertical AC Vacuum Contactor – Heavy-Duty Switching for Industrial & Mining Applications

Built for extreme-duty motor control and power switching, the CKJ5 1000A contactor three poles vertical type AC vacuum contactor delivers unmatched performance in 1140V AC systems. Designed for frequent operation in harsh environments—including coal mines, steel mills, and heavy machinery—it serves as the core component in explosion-proof electromagnetic starters and high-reliability motor control centers.

This robust vertical-mount vacuum contactor supports rated currents up to 1600A and features an exceptional electrical life of **200,000 cycles under AC-3 duty**—making it a superior replacement for outdated oil or air-break contactors. Its sealed vacuum interrupters eliminate arcing, reduce maintenance, and ensure stable switching even during rapid start-stop sequences.

Key highlights of the CKJ5 vertical vacuum contactor include:

• Rated voltage: 1140V AC, 50Hz; available in 1000A, 1250A, and 1600A variants

• Making capacity: 6000A (100 operations); breaking capacity up to 5000A

• Mechanical life exceeding **1 million operations** with minimal wear

• High operating frequency: up to **120 operations/hour under AC-4**, and short-time bursts up to 3000/h

• Suitable for **Class III pollution environments** and altitudes up to 2000m

• Compatible with flameproof enclosures for hazardous area installations

The compact, vertically oriented design—clearly shown in the image above—saves panel space while ensuring efficient heat dissipation and easy integration into switchgear assemblies. With its rugged construction, condensation-resistant insulation, and tolerance to ±15° mounting tilt, the CKJ5 1000A contactor meets stringent industrial reliability standards without compromising on service life or safety.

For demanding applications requiring continuous, maintenance-free motor control at medium voltage levels, the CKJ5 series sets a new benchmark in durability, efficiency, and operational intelligence.