1. Introduction: Building a More Resilient Supply Chain

In high-voltage power supplies, medical imaging (CT/X-Ray), industrial control, and test & measurement fields, high-voltage resistors play a central role in precision voltage division, current limiting, and energy discharge. Their performance stability directly impacts system imaging accuracy and long-term safety.

Currently, Vishay (Techno/Sfernice/Dale) dominates the global market, but this comes with high premiums and long lead times. The HVC HVR/GHP series, leveraging its independently developed high-voltage thick film technology, not only achieves 1:1 electrical parameter matching but also demonstrates significant advantages in VCR (Voltage Coefficient of Resistance) control, lead time flexibility, and customization capabilities.

2. Three Essential Metrics for High Voltage Resistor Selection and Replacement

When evaluating alternatives, engineers must focus on the following in-depth technical specifications, rather than just resistance value:

• VCR (Voltage Coefficient of Resistance): Resistance value changes non-linearly under high voltage. The HVC HVR series controls VCR to extremely low levels (e.g., < 5 ppm/V), ensuring precise voltage division circuits even with high voltage fluctuations.
• Pulse Handling Capability: For laser or discharge applications, the HVC GHP series adopts a non-inductive design, significantly enhancing its resistance to instantaneous high-energy impacts.
• High Temperature Stability: In 1000h full-load tests, HVC products maintain a resistance change rate of < 0.5%, with some models capable of withstanding temperatures up to +225°C.

3. HVC vs. Vishay: Precise Replacement Model Matrix

Based on HVC's standard coding rules, we have compiled the following recommended solutions for Vishay's core product lines.

3.1 Vishay FHV Series (Cylindrical/Leaded) Comparison

3.2 Vishay HTS Series (Precision High Voltage Thick Film) Comparison

For the HTS series, HVC achieves superior replacement stability by increasing individual power ratings.

4. HVC Part Number Logic Explained (ERP Index Standard)

To facilitate quick identification by engineers, HVC employs a highly structured part numbering logic:

• Series: HVR (High Voltage Thick Film) / GHP (High Power Thick Film/Non-Inductive).
• Style: BOP (Cylindrical with Leads) / FLT (Flat Chip).
• Size (Length): For example, 22 represents a body length of approximately 22mm, 51 for 51mm.
• Resistance Value and Tolerance: 100M represents 100 Megohm, F represents ±1%.
• Physical Specifications: Dia4X22 refers to a diameter of 4mm and a length of 22mm.

5. Why Choose HVC as Your Supply Chain Upgrade Solution?

• Rapid Response: Vishay lead times are often 20-40 weeks, while HVC standard models can be delivered in 4-8 weeks.
• Ultra-High Resistance Technology: Supports custom resistance values up to 10T Ohm, meeting precision sensor demands.
• 1:1 Physical Compatibility: Dimensions fully comply with industry standards (e.g., 51mm length corresponding to FHV-500), supporting seamless switching.
• Four-Step Selection Method: Confirm parameters -> Select from table -> Check margin (Power/Voltage Rating >= 1.3x system value) -> Sample verification.

6. Vishay Full Series Model Breakdown Table

Below is the complete breakdown of Vishay high voltage thick film resistor series, covering the core product lines of FHV, HTS, TR, and more.

A. FHV Series (High Voltage Thick Film Resistors)

B. HTS Series (Precision High Voltage Thick Film Resistors)

C. TR Series (General Purpose Thick Film Resistors)

7. Vishay High Voltage Thick Film Resistor Top 100 Popular Models

Below are the top 100 popular models from DigiKey's Vishay high voltage thick film resistor product line, covering the most commonly used models across various voltage and power ratings.

Conclusion

Through this technical white paper, we have systematically compared the HVC HVR series with Vishay high voltage thick film resistors. Whether from the perspectives of electrical parameters, physical dimensions, or supply chain flexibility, HVC provides a highly competitive alternative solution. We welcome engineers to contact us for samples and technical support.

More Information: www.hv-caps.com