Description
The 170A AC capacitor contactor is designed for capacitor bank control and reactive power compensation applications. It provides stable switching performance, durable operation, and easy integration into industrial electrical cabinets.
Specification
| Model | ATO-CJ19-170 |
| Rated Current | 170A |
| Rated Coil Voltage | AC 220V/380V |
| Maximum Controlled Capacitor Capacity | 90 kVAr |
| Number of Poles | 3P |
| Auxiliary Contact Configuration | 2NO+1NC |
| Rated Frequency | 50Hz |
| Operating Current | 165A |
| Conventional Thermal Current | 250A |
| Electrical Life | 20000 operations |
| Mechanical Life | 200000 operations |
| Mounting Method | DIN Rail Mount |
| Wiring Method | Screw Terminal |
| Protection Type | Capacitor Protection |
| Ambient Temperature | -5–40℃ |
| Protection Degree | IP20 |
| Dimensions | 200 × 120 × 192mm |
| Weight | 3.45kg |
Feature
- Stable Capacitor Switching Performance: The capacitor contactor is designed for capacitor bank applications, providing reliable switching control and helping maintain stable operation in reactive power compensation systems.
- Heat-Resistant Copper Coil Design: Uses a high-quality copper coil to improve thermal resistance, reduce heat generation, minimize oxidation, and support smoother contact operation for extended service life.
- Large-Size Silicon Steel Core: The AC capacitor switching contactor features a 32-piece silicon steel core structure with an enlarged magnetic core area to enhance heat dissipation, reduce energy loss, and improve contact engagement reliability.
- Reinforced Terminal Structure: Equipped with enlarged wiring terminals and a PA66 material base to provide secure connections, easier installation, and reliable performance for high-load electrical applications.
- Quick DIN Rail Mounting: ATO capacitor contactor supports standard 35mm DIN rail installation with a dual-hole wiring design, making installation and maintenance more convenient in control cabinets.
- Built for Industrial Power Systems: Combines durable materials and a robust switching mechanism to deliver dependable performance in capacitor compensation equipment, distribution systems, and industrial electrical applications.
Detail
Size (unit: mm)
| Amax | Bmax | Cmax | Dmax |
| 200 | 120 | 192 | 155 |
Wiring
220V
380V
Application
Tips: How can I reduce maintenance frequency for a capacitor switching contactor?
Choosing a suitable capacitor switching contactor that matches the system requirements is the first step to ensuring reliable operation. Proper installation, secure wiring connections, and operation within the rated specifications help prevent premature wear and unexpected failures. Keeping the electrical cabinet clean, maintaining good ventilation, and regularly checking terminals, contact conditions, and operating temperature can further reduce stress on the contactor. Routine inspections and timely troubleshooting help minimize downtime, improve system reliability, and extend the service life of the capacitor contactor.





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