Select switching and protection products for compressors, fans, pumps and HVAC control panels.
HVAC electrical loads
HVAC systems include compressors, condenser fans, air-handling units, pumps, heaters and control circuits. Motors draw high starting current and may operate frequently, so switching duty and protection coordination are essential.
Recommended products
| Function | Typical product |
|---|---|
| Compressor/fan switching | Magnetic contactor selected for motor duty |
| Short-circuit protection | MCB or MCCB sized and coordinated for the feeder |
| Control circuit | Miniature breaker or fuse holder |
| Voltage transients | Surge protection for panels and controls |
Selection information
- Motor rated current and starting method.
- Supply voltage, phases and frequency.
- Coil voltage and control-system requirements.
- Expected switching frequency and utilization category.
- Ambient temperature and panel ventilation.
HVAC procurement in Pakistan
Contractors and maintenance teams should provide compressor or motor nameplate data when requesting a contactor. The Shenzhen Nata MC Series supports common motor-control and HVAC applications, with models available for different current ranges.
Frequently asked questions
How is a contactor sized for an HVAC compressor?
Use the motor current, utilization category, starting duty and manufacturer data rather than selecting only by a general ampere label.
Why does an HVAC contactor fail?
Common causes include undervoltage, coil mismatch, excessive switching, poor connections, heat and contact wear.
Need Product Selection or Current Prices?
Share the application, operating voltage, current, load details and quantity. Shenzhen Nata supports buyers, contractors, panel builders and distributors across Pakistan and international markets.
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