1. Introduction

In critical applications such as high-voltage power supplies, medical imaging equipment (CT/X-Ray), industrial control, and test & measurement, high-voltage resistors play a fundamental role in precision voltage division, current limiting, and energy dissipation. Their stability directly impacts the imaging accuracy and long-term safety of the entire system.

Currently, Vishay (Techno/Sfernice/Dale) holds a significant position in 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 with Vishay but also demonstrates significant advantages in VCR (Voltage Coefficient of Resistance) control, high-temperature resistance, and customized delivery.

2. Product Series Matrix Comparison

3. Key Technical Parameter Analysis

When conducting replacement evaluations, HVC recommends that engineers focus on the following dimensions:

• VCR (Voltage Coefficient of Resistance): Under high voltage, the resistance value will undergo non-linear changes. The HVC HVR series controls VCR at extremely low levels (e.g., < 5 ppm/V), ensuring that the voltage divider circuit remains accurate even with voltage fluctuations.
• Temperature Coefficient (TCR): HVC standard products offer excellent performance of 25 - 100 ppm/°C, ensuring stability across a wide temperature range.
• Upper Operating Temperature Limit: Some HVC models can operate at temperatures up to +225°C (higher than the original manufacturer's standard of +175°C), suitable for extreme industrial environments.
• Pulse Capability: The GHP series uses non-inductive serpentine cut design, significantly increasing the ability to withstand instantaneous high-energy impacts.

4. Model Cross-Reference Table

4.1 FHV Series → GHP Flat Series (Perfect Match)

4.2 HTS Series → BOP/BSP Tubular Series (Typical Cross-Reference)

5. HVC Standard Part Number Logic Explanation

To facilitate ERP database indexing, HVC has standardized its part numbering rules, achieving a "what you see is what you get" approach:

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

6. Why Choose HVC as Your Preferred Alternative?

1. Fast Delivery: Vishay's cutting-edge series typically have lead times of 20-40 weeks, while HVC standard models can achieve fast delivery in 4-8 weeks.
2. Ultra-High Resistance Technology: HVC can provide custom resistance values up to 10TΩ, meeting the demands of precision sensors and laboratory applications.
3. 1:1 Physical Compatibility: Dimensions are in full compliance with industry standards (e.g., 51mm length corresponding to FHV-500), allowing for seamless replacement without modifying PCB layouts.
4. Four-Step Selection Method: Confirm parameters -> Select from table -> Verify margins (Power/Voltage Rating ≥ 1.3×) -> Sample validation.

7. Typical Application Areas

• Medical Diagnostics: Magnetic Resonance Imaging, high-voltage ultrasonic processing, CT high-voltage generator damping.
• Test and Measurement: High-voltage probes, oscilloscope attenuators, precision voltage divider networks.
• Power Electronics: Inverter protection, high-voltage circuits in photovoltaic inverters.
• Industrial Lasers: Energy control in Pulse Forming Networks (PFN).

8. Vishay Full Series Model Cross-Reference Table

The following is the complete breakdown of Vishay high-voltage thick film resistor series, covering major product lines such as FHV, HTS, and TR.

A. FHV Series (High Voltage Thick Film Resistors)

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

C. TR Series (General Purpose High Voltage Resistors)

9. Vishay Complete Model Quick Reference Table

The following are 100 popular complete part numbers for Vishay high-voltage thick film resistors, sourced from channels such as DigiKey:

Contact and Technical Support

If you are looking for alternatives to discontinued Vishay series, or have any needs regarding high-voltage resistor selection or customization, the HVC replacement engineering team is always ready to provide support.

We are committed to providing free sample testing and OEM-level technical support for all replacement projects, jointly driving the continuous development of high-voltage technology.

Copyright Notice: This document is the property of HVC Capacitor Manufacturing. All rights reserved. Reproduction, distribution, or use of this document or any part thereof without express written permission is prohibited.