1. Introduction: The Foundation of High Voltage System Performance

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

Currently, Vishay (Techno/Sfernice/Dale) holds a significant position in the global market, but this comes with high costs and long lead times. The HVC HVR/GHP series, leveraging its independently developed high voltage thick film technology, not only achieves 1:1 matching in electrical parameters but also demonstrates significant advantages in VCR (Voltage Coefficient of Resistance) control and customized delivery.

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

When evaluating alternatives, engineers must focus on the following indicators:

1. VCR (Voltage Coefficient of Resistance): Resistance values can change non-linearly under high voltage. The HVC HVR series optimizes its paste material to control VCR to extremely low levels (e.g., < 5 ppm/V), ensuring precise voltage division circuits even with high voltage fluctuations.
2. Pulse Handling Capability: For laser or discharge applications, resistors must withstand instantaneous high-energy impacts. The HVC GHP series adopts a non-inductive design, enhancing its resistance to pulse failure.
3. Stability ($\Delta R/R$): In 1000h full-load tests, HVC products maintain a resistance change rate of < 0.5%.

3. HVC vs. Vishay Precision Replacement Model Matrix (Selected Version)

Based on HVC's part numbering rule: Series-Structure-Length-Resistance/Tolerance-Power Physical Dimensions. We have compiled the following cross-reference table for Vishay's core product lines.

A. Vishay FHV Series (Cylindrical/Leaded) - Specific Cross-Reference

B. Vishay HTS Series (Precision Thick Film High Voltage) - Specific Cross-Reference

For the HTS series, we ensure safety under complex operating conditions through performance redundancy.

C. Common General Model Cross-Reference

4. In-Depth Understanding of HVC Part Numbering Rules

To facilitate indexing and searching in your ERP database, we have standardized the part numbering logic:

• Series: HVR (High Voltage Thick Film Resistor).
• Structure: GHP (High Power Tubular).
• Size Code: 3 represents 3W/12kV, 4 is 4W/15kV, 5/5 is 0.65W/1.5kV SMD, 8/5 is 1.6W/8kV, 10.51 is 6W/30kV.
• Resistance and Precision: 100M represents 100 Megohm (100MΩ), 1G represents 1GΩ, F represents ±1% precision.
• Power Class: 0.65W, 1.6W, 3W, 4W, 6W etc. indicate the nominal power rating.

Analysis Examples:

• HVRGHP 4 = HVR Series + GHP High Power Tubular Structure + Class 4W (4W, 15kV)
• HVRGHP 8/5 = HVR Series + GHP Structure + Size 8/5 (1.6W, 8kV)
• HVRGHP 3 = HVR Series + GHP Structure + Class 3W (3W, 12kV)

5. Why Choose HVC as an Alternative Solution?

1. Lead Time Advantage: Vishay's cutting-edge series typically have lead times of 20 weeks or more, while HVC standard models can achieve fast delivery in 4-8 weeks.
2. Ultra-High Resistance Support: HVC can provide customized resistance values up to 10TΩ, meeting the demands of cutting-edge laboratory and physics experiments.
3. 1:1 Physical Compatibility: Dimensions are in full compliance with industry standards (e.g., 51mm length corresponding to FHV-200), enabling seamless replacement without modifying PCB layouts.

6. Complete Vishay Series Cross-Reference Tables

To facilitate quick search and replacement for engineers, we have compiled the following detailed cross-reference tables for Vishay's three main product series (FHV, HTS, TR).

A. Vishay FHV Series Complete Cross-Reference (22 Models)

B. Vishay HTS Series Complete Cross-Reference (78 Models)

... (58 more HTS models follow the same pattern, covering HTS0058, HTS0523, HTS0932, HTS0947, HTS0972, HTS0547 series with various resistance values and specifications)

C. Vishay TR Series Complete Cross-Reference (15 Models)

7. Vishay Popular Thick Film Resistor Model Quick Reference

Below are 100 popular Vishay high voltage thick film resistor complete part numbers from DigiKey and other channels:

Contact and Technical Support

If you are looking for alternatives to Vishay discontinued series, or have any requirements 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. Reproduction or commercial use without permission is prohibited.
Disclaimer：Technical parameters in this document are for reference only. Specific specifications should be based on the latest datasheet.