Key Takeaway: HVC provides pin-to-pin compatible replacements for Vishay FHV, TD, and DRA high-voltage resistor series — with NRE-free cross-reference qualification support. The one exception is the AC/AT wirewound series, where HVC does not currently offer a direct replacement.

If you're sourcing high-voltage resistors and currently using Vishay's product lines, you've probably wondered whether a drop-in alternative exists that delivers the same performance at a better price and lead time. The short answer: for most Vishay HV resistor series, yes. Here's the full breakdown.

Vishay-to-HVC Replacement Matrix

The following table maps each Vishay high-voltage resistor series to its HVC equivalent. All HVC alternatives are designed for pin-to-pin compatibility — no PCB redesign required.

Note on AC/AT Series: HVC does not manufacture wirewound resistors. If your application currently uses the AC/AT Series, Contact HVC Engineering to discuss whether a film-based alternative (flat or tube) could meet your requirements.

Case Study: European Medical OEM Migration

A European medical imaging OEM replaced 2,400 pieces/year of Vishay FHV-25 resistors (25kV, 100MΩ, ±1%) in X-ray high-voltage generator divider networks. The results:

Series-by-Series Breakdown

Vishay FHV Series → HVC HVR-GFP/GXP

The FHV series is Vishay's most widely used high-voltage flat resistor line. HVC's HVR-GFP/GXP Flat-Film Resistors use a similar thin-film-on-ceramic construction, delivering equivalent or better TCR at a lower price point. Pin spacing and voltage ratings are matched for direct substitution.

Vishay TD Series → HVC HVR-Division Network

The TD series provides thick-film resistor divider networks for HV voltage sensing. HVC's division network products are available with custom resistance ratios, allowing you to specify exact divider values rather than selecting from fixed options.

Vishay DRA Series → HVC HVR-BSP/BOP

The DRA series uses axial cylindrical form factors rated up to 60kV. HVC's tube-style resistors (HVR-BSP/BOP Tube Resistors) cover the same voltage range with improved moisture resistance.

Vishay AC/AT Series → No Direct HVC Replacement

The AC/AT series uses axial cemented wirewound construction (5kV – 25kV, 1Ω – 100kΩ). HVC does not manufacture wirewound resistors and does not offer a drop-in replacement for this series. For applications where wirewound limitations are a concern (parasitic inductance, thermal drift), HVC's film-based resistors may offer a performance upgrade — though a circuit redesign may be required. Contact HVC Engineering to discuss.

Why HVC Over Other Vishay Alternatives

• NRE-free qualification: Cross-reference samples at no charge
• 4–6 week lead time: vs. 22–28 weeks for Vishay
• Full HV ecosystem: HVR-GFP/GXP Flat-Film Resistors, HVR-BSP/BOP Tube Resistors, HVC HV Ceramic Disc Capacitors, HVC HVD High-Voltage Diodes
• Engineering support: Direct access for custom solutions