Call:+86 13689553728 Email:sales@hv-caps.com
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High Voltage Ceramic Capacitor Expert
Is HVC a qualified second source for KOA RK92/RK92D/RK92L high voltage resistors?
This is one of HVC's highest-priority replacement programs — KOA's RK92/RK92D/RK92L series entered official EOL (End-of-Life) status, creating an urgent global supply crisis that HVC's HVRGXP series directly addresses with pin-to-pin compatible drop-in replacements.
KOA Corporation (Japan) announced the discontinuation of its RK92 family of high-voltage thick film resistors due to manufacturing facility restructuring. This single part number family powered:
* Medical: X-ray CT scanner high-voltage multiplier stacks
* Industrial: CO₂ laser pulse-forming network charging resistors
* Defense: Radar transmitter modulator bleeder networks
* Scientific: Particle accelerator beam-line voltage dividers
Current market status:
* Remaining inventory depleting rapidly across all authorized distributors
* Secondary market pricing inflated 400% – 800% above original list price
* No announced successor product from KOA or any Japanese competitor
* Engineering teams facing imminent line-down risk for active production programs
| KOA Model | Voltage | Resistance | Power | HVRGXP Equivalent | Modification Required |
| RK92-20K | 20kV | 100MΩ – 1GΩ | 5W – 10W | HVRGXP-20K | None — direct substitution |
|---|---|---|---|---|---|
| RK92D-30K | 30kV | 50MΩ – 500MΩ | 7.5W – 15W | HVRGXP-30K | None — direct substitution |
| RK92L-50K | 50kV | 10MΩ – 200MΩ | 10W – 25W | HVRGXP-50K | None — direct substitution |
Zero PCB redesign required — HVRGXP matches RK92 footprint dimensions, mounting hole pattern, and terminal positioning within ±0.5mm tolerance.
| Parameter | KOA RK92 (Original Spec) | HVC HVRGXP (Replacement) | Upgrade |
|---|---|---|---|
| Tolerance | ±1%, ±5% | ±0.2%, ±0.5%, ±1%, ±5% | ✅ More precision options |
| TCR | ±100 – 200 ppm/°C | ±80 ppm/°C | ✅ Better thermal stability |
| Overload Margin | 10x rated, 5 sec | 12x rated, 5 sec | ✅ 20% higher surge capacity |
| Lead Time (when available) | 20+ weeks (pre-EOL) | 4 – 6 weeks | ✅ 5x faster |
| Availability Status | EOL — critical shortage | In production — unlimited | ✅ Secure supply chain |
Contact: Sales Department
Phone: +86 13689553728
Tel: +86-755-61167757
Email: sales@hv-caps.com
Add: 9B2, TianXiang Building, Tianan Cyber Park , Futian, Shenzhen, P. R. C
