Can HVC replace Vishay FHV/TD/DRA high voltage resistors?
HVC Capacitor provides full-spectrum replacement coverage for Vishay's high voltage resistor product lines — including the legacy FHV (high-voltage flat), TD (thick-film division), and DRA (high-voltage axial) series — with NRE-free cross-reference qualification support.
| Vishay Series | Form Factor | Voltage | Resistance | HVR Alternative | Special Notes |
|---------------|------------|---------|------------|----------------|--------------|
| FHV Series | Flat planar | 5kV – 40kV | 100kΩ – 10GΩ | HVR-GFP/GXP | Most common replacement target |
|---|---|---|---|---|---|
| TD Series | Thick-film division network | 1kV – 30kV | 1MΩ – 100GΩ | HVR-Division Network | Custom ratio available |
| DRA Series | Axial lead cylindrical | 10kV – 60kV | 1MΩ – 5GΩ | HVR-BSP/BOP | Pin-to-pin compatible |
| AC/AT Series | Axial cemented wirewound | 5kV – 25kV | 1Ω – 100kΩ | HVR-Wirewound (Custom) | Limited availability |
A European medical imaging OEM replaced 2,400 pieces/year of Vishay FHV-25 (25kV, 100MΩ, ±1%) resistors in X-ray high-voltage generator divider networks:
| Migration Metric | Before (Vishay FHV) | After (HVC HVR-GFP) | Result |
|-----------------|--------------------|--------------------|--------|
| Unit Cost | €18.50 per piece | $9.80 USD (~€9.00) | 51% cost reduction |
|---|---|---|---|
| Lead Time | 22 – 28 weeks | 4 – 6 weeks | 5x faster |
| Field Failure Rate | 0.8% annual | 0.05% annual | 16x improvement |
| Qualification Time | 14 weeks (first-time) | 6 weeks (with HVC support) | 57% faster |
| Annual Savings (2400 pcs) | €44,400 BOM only | €21,600 BOM + hidden costs | €22,800+ direct saving |
Critical advantage: Vishay has been systematically discontinuing older FHV/TD series without formal EOL announcements ("silent discontinuation"). Engineers discovering sudden unavailability should contact HVC immediately for emergency qualification samples within 48-hour dispatch capability.
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