Hybrid Capacitor Contactor [UHC]

Hybrid Capacitor Contactor

  • Series:[UHC] 40-250A, 220-1350VAC
  • Standard:IEC 60947-1 class AC-3 and AC-4


With patent electronic technologies, UHC is the latest generation of capacitor contactor in the world, includes two exclusive technologies presenting higher short time withstand current to 3000A and higher interrupting current to 800% rated continuous current. The most surprised invention in UHC contactors are Dual-Zero control technologies which provides Zero arc-voltage and Zero in-rush current during capacitors making or breaking operation. Traditional contactor will create in-rush current up to 1000% rated current to impact capacitor at each closing operation, capacitors shall eventually be punctured after few hundreds close-operation. Goodwell type UHC contactors are born to solve this engineer's headache being existed for years. With UHC - No any single in-rush current to impact capacitor! And an extra bonus - No any arc will attack main-contact surface at each opening operation of UHC!


UHC contactor meets IEC Standard 60947-1 class AC-3 and AC-4 requirements. Working voltage from AC 220V, 440V 780V and up to 1350V, rated current from 40A, 60A, 80A, 100A, 125A, 160A, 200A up to 250A. UHC contactors are best choice to replace traditional silicone-control contactors where its major problems include over-voltage, harmonic and heat radiation not just shorten its own service life but also deteriorate capacitors life.


  • Life expectancy designed to 100,000 hours.
  • Absolutely zero closing current and zero opening arcing voltage.
  • Mechanical bridge contacts provide higher current ratings.
  • Much smaller in size of thyristor due to its theoretically shortest by-pass time.
  • No series reactor may be required in PFC application.
  • No harmonic contamination occurred during operation.
  • No temporary over voltage during contactors closing operation.
  • Good for expulsion-proof application.
  • Always provides 3 phases synchronized operation in making or breaking the contactor, free from phase unbalanced risk even under unskilled random operation of the contactor.
  • Be a Green Energy user, consider this low power consumption, no coil-burn out, low contact resistance, protect your capacitor from surge current impact, protect contacts from arc corrosion, eventually to save bulk material from earth, by selecting this durable, reliable and unbeatable Hybrid Capacitor Contactor, UHC.

Theory of Operation

Thyristor by-pass the main-contact precisely at zero current or voltage wave angle, just a few millisecond after making or breaking signal received by the control circuit. Precise detection of the current and voltage difference is the key to get 100% control accuracy.

UHC Installation Instruction

  • Environmental temperature range shall be: -40°C ~ +45°C
  • Relative humidity shall be: less than 95%
  • Pollution class: 3
  • Installation class: 3 (III)
  • Mounting surface angle: maximum ±5° incline.
  • Mounting place sea level: < 2000M
  • Mounting surface shall be free from: vibrating, moving, impacting.
  • Main circuit is not designed for DC power interrupting.
  • Application for paralleling power source or forward/reverse motor rotating, please contact us.
  • Visual check label's printed ratings of voltage, power, frequency to meet field requirement.
  • Special care inspection shall be taken while one of the following condition been found:
    • Operation more than 200,000 times.
    • Abnormal noise or visual defect found.
    • Every six months interval upon contactors starting in service.

UHC Ratings - 3 Phase 40A~250A

Cat. No. UHC-
Main Circuit Ratings
Continuous Current 40A 63A 80A 100A 125A 160A 200A 250A
Heating Current 60A 80A 100A 120A 150A 180A 220A 250A
Operating Voltage 450VAC
Synchronous Making Delay <500ms
Synchronous Breaking Delay <100VAC
Withstand Voltage to Control Circuit >1,500VAC
Control Voltage (Ue) 110V 220VAC (75%~120%)
Voltage to Maintain Closing <50% Ue
Power to Maintain Closing 1.8W 3W
Triggering Signal Transistor Pulsing
Life Expectancy Electrical >1,000,000 times of ON-OFF operation
Mechanical >5,000,000 times of ON-OFF operation
Auxiliary Contacts Optional
Capacitor Rating at 38VAC Common Compensation ≤30
Residue Voltage Detect Yes
Environmental Temperature -40°C ~ +45°C
Net Weight 2.1kg 2.3kg 5.2kg 5.7kg
Remarks [1] UHC contactor is designed for capacitor switching, a patent Zero-Voltage making feature is included to provide Zero-Inrush current while switch-on capacitor into power line.
[2] Main circuit shall not be used for DC power.

UHC Ratings - Single Phase 80A~250A

Cat. No. UHC-801C UHC-1251C UHC-1601C UHC-2501C
Main Circuit Ratings
Continuous Current 100A 125A 160A 250A
Heating Current 125A 125A 180A 280A
Operating Voltage 450VAC
Withstand Voltage to Control Circuit >1,500VAC
Control Voltage (Ue) 110V 220V 380VAC, 50/60Hz (75%~120%)
Power to Maintain Closing Voltage <50% Ue
Watt 2W 2.5W
Capacitor Load at 38VAC Common Compensation ≤15 KVAR ≤25 KVAR ≤35 KVAR ≤50 KVAR
Life Expectancy Electrical >1,000,000 times (100,000 hours)
Mechanical >5,000,000 times
Residue Voltage Detect Yes
Environmental Temperature -40°C ~ +45°C
Net Weight 1.8kg 1.9kg
Remarks [1] Available control voltage: 5V, 9V, 12V, 24V, 36V, 48V on request.
[2] Main circuit shall not be used for DC power.