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Precision Power Resistors &
Advanced Load Banks

Trusted by 4000+ global clients. ZENITHSUN delivers high-performance braking resistors, high voltage resistors, wirewound resistors, and load banks for New Energy, Industrial, Medical & Aerospace applications.

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About ZENITHSUN

Shenzhen JKTech Technology Co., Ltd., operating under the brand ZENITHSUN, is a leading manufacturer of power resistors, high voltage resistors, and load banks in China. Founded in 2014 by industry experts, we are committed to delivering cost-effective, high-quality solutions for industrial and automotive manufacturing.

ZENITHSUN Manufacturing

Industrial Leadership

China's leading brand in power resistors with over 10 years of technical expertise in SMT and power electronics.

Certified Quality

Certified under IATF16949, ISO9001/14001, ISO45001, GJB9001C, UL, AEC-Q200, CE, RoHS, and REACH standards.

Global Reach

Serving 4000+ customers worldwide with OEM/ODM capabilities and rapid customization.

Our Product Range

High-performance resistors and load banks engineered for reliability, precision, and durability across demanding industrial and energy applications.

Braking Resistor

Aluminum housed, high durability resistors for dynamic braking in trains, EVs, and industrial drives.

  • • Power: 50W – 10kW
  • • Voltage: Up to 1200V
  • • Cooling: Air or Water
  • • Certifications: CE, RoHS

Power Resistor

High-power wirewound and thick film resistors for energy systems and power supplies.

  • • Power: 10W – 50kW
  • • Resistance: 0.01Ω – 100kΩ
  • • Tolerance: ±1% to ±10%
  • • Applications: Inverters, UPS

High Voltage Resistor

Precision thick film resistors for medical imaging, aerospace, and HV circuits.

  • • Voltage: Up to 30kV
  • • Resistance: 1MΩ – 1GΩ
  • • Low TCR: ±50ppm/°C
  • • AEC-Q200 Compliant

Water Cooled Resistor

Efficient thermal management for high-density power systems and EV charging.

  • • Power: 5kW – 100kW
  • • Coolant: Water/Glycol
  • • IP65 Rated Enclosure
  • • Customizable Manifolds

Load Bank for Battery

DC load banks for battery testing in data centers, telecom, and EV infrastructure.

  • • Voltage: 12V – 1500V DC
  • • Power: 1kW – 500kW
  • • Programmable Discharge
  • • Data Logging

AC Load Bank

Resistive load banks for generator and UPS testing in industrial and healthcare.

  • • Voltage: 120V – 690V AC
  • • Power: 5kVA – 2MVA
  • • 3-Phase Configurable
  • • Remote Monitoring

Rheostats / Potentiometers

Adjustable resistors for motor control, instrumentation, and calibration.

  • • Power: 10W – 500W
  • • Resistance: 1Ω – 100kΩ
  • • Rotary or Linear
  • • High Durability Shaft

Neutral Grounding Resistor

Protective resistors for grounding systems in power distribution and wind turbines.

  • • Voltage: 480V – 35kV
  • • Fault Current: 5A – 1000A
  • • Stainless Steel Housing
  • • IEC 60781 Compliant

LED Load Resistor

Precision resistors for LED circuits, precharge, and dummy loads in photovoltaic systems.

  • • Power: 1W – 50W
  • • Resistance: 1Ω – 10kΩ
  • • Aluminum Housed
  • • High Pulse Tolerance

Shunt Resistor

Low resistance, high precision shunts for current sensing in power electronics.

  • • Resistance: 0.1mΩ – 100mΩ
  • • Accuracy: ±0.5%
  • • 4-Terminal Design
  • • Manganin Alloy

Cement Resistor

Robust, flame-retardant resistors for high surge and industrial environments.

  • • Power: 2W – 25W
  • • Surge Withstand: High
  • • Flameproof Encapsulation
  • • Wide Temp Range

High Energy Resistor

Designed for pulse and surge applications in medical, military, and aerospace.

  • • Energy: Up to 10kJ
  • • Pulse Duration: ms to s
  • • Non-Inductive Design
  • • Hermetic Sealing

Applications Across IndustRIES

Our resistors and load banks are trusted in over 56 applications, from New Energy Vehicles to Aerospace and Medical Equipment.

New Energy Vehicles

Braking resistors for EVs, precharge resistors, battery testing load banks.

Solar & Wind Energy

Inverters, grid-tie systems, energy storage, and power conversion.

Medical Equipment

MRI, CT, X-Ray, electrosurgery, and patient monitoring systems.

Data Centers

Load banks for UPS and generator testing, battery discharge systems.

Rail Transportation

Dynamic braking for trains, trams, and underground systems.

Aerospace & Defense

High-reliability resistors for avionics, radar, and military power systems.

4000+
Global Customers
56+
Resistor Applications
10+
Load Bank Uses
9
Global Certifications

Frequently Asked Questions

Get answers to common inquiries about our products and services.

What is a braking resistor used for?

A braking resistor dissipates excess energy generated during motor deceleration in EVs, trains, and industrial drives, preventing overvoltage in the drive system.

Can you customize resistor values and housings?

Yes, ZENITHSUN offers full OEM/ODM services with custom resistance values, power ratings, cooling methods, and mechanical designs.

What certifications do your products have?

Our products are certified under IATF16949, ISO9001/14001, ISO45001, GJB9001C, UL, AEC-Q200, CE, RoHS, and REACH standards.

Do you offer load banks for battery testing?

Yes, we provide DC load banks for battery discharge testing in data centers, telecom, EV charging stations, and renewable energy systems.

What is the lead time for custom orders?

Typical lead time is 2–4 weeks depending on complexity. Prototypes can be delivered in as little as 10 days.

Get in Touch

For inquiries, quotes, or partnership opportunities, visit the official OneResistor website to contact ZENITHSUN directly.

Visit Official Website to Contact

Company: Shenzhen JKTech Technology Co., Ltd. (ZENITHSUN)

Website: oneresistor.com | zenithsunohm.com

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