Abstract

This technical white paper aims to delve into the critical role of high voltage resistors in modern electronic systems and provide a detailed comparison of the performance differences between the HVC HVR/GHP/BSP Series and industry-leading products such as Vishay. Facing global supply chain fluctuations and cost optimization pressures, HVC offers a high-performance, high-reliability alternative matrix. With its excellent VCR (Voltage Coefficient of Resistance) control, +225°C extreme temperature resistance, and industry-superior Partial Discharge (PD) characteristics, HVC has become the preferred benchmarking solution for medical imaging, industrial high-voltage power supplies, and scientific research fields.

1. Technical Background: The Core Value of High Voltage Resistors

High voltage resistors are not merely basic voltage divider components; they are the "safety anchors" for the stability of high voltage systems. Their main functions include:

• Precision Voltage Division and Sampling: Providing high-precision feedback signals for control systems.
• Current Limiting and Safe Discharge: Protecting circuits from surges and rapidly discharging stored energy after shutdown.
• Damping and Voltage Equalization: Suppressing parasitic oscillations and ensuring uniform voltage distribution among series components.

2. Brand Comparison: Vishay and HVC Model Precise Matching

For common Vishay FHV (Flat) and HTS (Tubular) series, HVC offers 1:1 or performance-enhanced alternative options.

2.1 FHV Series → GHP Flat Series (Precision and Space Optimization)

Suitable for medical equipment scenarios with dual requirements for thickness and voltage withstand.

Vishay Target Model	HVC Replacement Model	Parameters (Power/Voltage)	HVC Specifications	Dimensions (L×W)	Match Level
FHV100	HVRGHP 8/5	1W, 7.5kV	1.6W, 8kV	25.9×6.3mm	⭐⭐⭐⭐⭐
FHV100	HVRGHP 8/5	1W, 7.5kV	1.6W, 8kV	25.9×6.3mm	⭐⭐⭐⭐⭐
FHV500	HVRGHP 4	4W, 15kV	4W, 15kV	51.3×7.5mm	Perfect Match
FHV500	HVRGHP 4	4W, 15kV	4W, 15kV	51.3×7.5mm	Perfect Match

2.2 HTS Series → BSP/BOP Tubular Series (High Power and High Voltage)

Tubular structures designed for high current heat dissipation and ultra-high voltage environments.

Vishay Target Model	HVC Replacement Model	Parameters (Power/Voltage)	HVC Specifications	Selection Advantage
HTS0068	HVRBOP20	1W, 2kV	1.5W, 3kV	50% power margin, higher voltage withstand limit
HTS523-10490	HVRBSP20	1W, 5kV	2.3W, 5kV	Doubled power, improved system redundancy
HTS0068 (8mm)	HVRBOP14	1W, 2kV	1.5W, 3kV	4mm small tube diameter design, economical and practical
HTS972-10797	HVRBSP103	4W, 30kV	12.5W, 32kV	Ultra-long design, extremely large heat dissipation margin

3. Deep Comparison: HVC's Technical Advantage Gap

Parameter	Vishay (Typical Series)	HVC HVR Series	HVC Technical Upgrade
Resistance Range	10R - 100GΩ	10R - 100GΩ	Supports ultra-high resistance customization, covering most discharge requirements
Tolerance	0.1% - 10%	0.1% - 10%	Customizable to ±0.05%, meeting aerospace-grade precision measurement
TCR	±25 - ±200 PPM/°C	±25 - ±200 PPM/°C	Standard products perform excellently, customizable to ±10 PPM/°C
Operating Temperature	-55°C to +175°C	-55°C to +225°C	Significantly better than Vishay, suitable for extreme harsh conditions
Partial Discharge (PD)	< 10 pC	< 5 pC	Extremely low discharge level, prevents corona, extends component life
Pulse Handling Capability	Good	Excellent (5x rated power/5 seconds)	Proprietary paste formulation, optimized for laser and radar pulses

4. Selection and Application Guidance

4.1 Structured Selection Strategy

• Space-Constrained Type: Prefer GHP Series. Maximum thickness only 3mm, maximum voltage withstand up to 35kV, ideal for replacing flat lead resistors.
• High Heat Dissipation/High Voltage Type: Prefer BSP Series. 8mm large tube diameter design, voltage withstand up to 60kV, with extremely strong power dissipation capability.
• Cost-Sensitive Type: Choose BOP Series. 4mm small tube diameter design, maintaining high performance while offering excellent cost-effectiveness.

4.2 Replacement Process Guide

1. Step 1: Confirm the original Vishay model's power, rated voltage, resistance value, and physical package dimensions.
2. Step 2: Refer to the HVC comparison table to select models with equivalent or better specifications.
3. Step 3: Verify safety margin, recommend rated power ≥ original model, rated voltage ≥ system peak voltage × 1.3.
4. Step 4: Request HVC samples for mechanical compatibility and electrical stability verification testing.

7. Vishay Complete Model Quick Reference Table

The following are popular complete models of Vishay high voltage thick film resistors compiled from DigiKey and other channels (100 models):