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As KOA Speer’s RK92 high-voltage resistor series approaches its EOL on March 31, 2027, OEM and MRO teams face a familiar risk: they wait too long and a single resistor can trigger redesign work, re-qualification loops, and service headaches in the field.
For years, RK92 thick-film SIP resistors have been a go-to choice for high-voltage circuits in medical equipment, industrial controls, power supplies, and aerospace test systems, thanks to their compact form factor and proven reliability.
To protect existing designs and future builds, IBS Electronics has partnered with HVC Capacitor to provide a clear & validated migration path via the HVC HVRGHP flat-style high-voltage resistor series.
Continuity for Critical High-Voltage Applications
The HVC HVRGHP series is engineered specifically for high-voltage measurement, power supplies, medical systems, electrostatic equipment, and smart-grid metering, making it a natural fit where RK92 parts have historically been designed in.
With non-inductive construction, high-density assembly capability, and working voltages up to 24 kV, HVRGHP resistors give engineers more headroom on voltage and power while maintaining stable performance over time.
Spec-for-Spec Advantages (and Designs Considerations)
Parameter | HVC HVRGHP Series | KOA RK92 Series (EOL: 3/31/2027) | Notes |
Manufacturer | HVC Capacitor Manufacturing Co., Ltd. | KOA Speer Electronics | |
Technology Type | Thick Film, High Voltage Flat Style Resistor | Thick Film, High Voltage SIP Style Resistor | Both thick film for HV applications |
Resistance Range | 200 Ω – 2 GΩ | 1 MΩ – 1 GΩ (typ.) | HVC offers broader low-end range (down to 200 Ω) and higher-end extension (up to 2 GΩ) |
Rated Power (at +70 °C) | 5 W (HVRGHP2/2-150MJ model) | 0.5 W – 2.7 W (model dependent) | HVC provides higher single-part power rating |
Max. Working Voltage | Up to 24 kV | 4 kV – 15 kV depending on model (e.g., RK92 9C = 10 kV, 18X = 15 kV) | HVC exceeds KOA’s maximum voltage capability |
Tolerance Options | ±0.2 %, ±0.5 %, ±1 %, ±5 %, ±10 % | ±0.5 %, ±1 %, ±2 %, ±5 %, ±10 %, ±20 % | Both offer tight tolerance options; HVC includes ±0.2 % for precision |
Temperature Coefficient (TCR) | ±100 ppm/°C (typ.) | ±50 – ±300 ppm/°C depending on model | HVC’s TCR matches RK92’s mid-grade precision types |
Operating Temperature Range | +25 °C to +105 °C | −40 °C to +125 °C | KOA covers wider thermal range, but HVC rated for high-voltage stability at elevated temps |
Voltage Coefficient | ≤130 % max working voltage | Not specified (typically 100 %) | HVC supports higher overvoltage margin |
Construction / Shape | Flat style, non-inductive, silicone or surface coating | SIP (Single Inline Package), cylindrical body | HVC’s flat design supports high-density assembly |
Coating Options | 225 °C high-temp silicone or economic surface silicon | Flame retardant resin UL94V-0 | HVC offers both high-temp and cost-effective variants |
Dimensions (example) | A = 51.3 mm, B = 14.2 mm, C = 48.2 mm | RK92-9C ≈ L = 26 mm, H = 6.5 mm (typ.) | HVC unit is larger and supports higher wattage / voltage |
Applications | HV measurement, power supplies, medical, electrostatic, smart grid | High-voltage circuits, power supplies | Overlapping target markets; HVC suitable for direct substitution |
Compliance | RoHS / REACH, Pb-free | RoHS (Pb-glass exemption) | Both compliant |
Availability | Active production | EOL – Last Buy 3/31/2027 | HVC ideal replacement |
In many designs, HVRGHP can be used as an electrical drop-in or low-effort design-level replacement, offering more voltage and power margin and finer resistance/tolerance options. Mechanical format changes—from RK92’s SIP to HVRGHP’s flat body can usually be handled with straightforward layout tweaks while maintaining creepage and clearance targets.
Typical HVGRHP use cases include:
- High-voltage measurement and sensing
- Medical X-ray and imaging systems
- Smart grid and metering
- Aerospace and defense electronics
De-Risk Your RK92 Migration Before 2027
With KOA RK92 production ending in 2027, now is the time to plan you long-term strategy for high-voltage resistors.
Next steps:
- Send IBS Electronics your RK92 part list or BOM
- Request a KOA RK92 → HVC HVRGHP cross-reference chart
- Arrange engineering support and sample kits for your key platforms
By transitioning to HVC’s HVRGHP series with IBS as your supply-chain partner, you can avoid last-minute redesigns, keep your safety approvals intact, and secure a long-term, high-voltage resistor roadmap for production and service.
Submit your part list or BOM to IBS Electronics, get your KOA RK92 → HVC HVRGHP cross-reference chart, and secure engineering support and sample kits for a seamless high-voltage resistor transition.
Why We Are One
For over 40 years, IBS Electronics Group has provided a broad range of integrated supply chain and electronicsmanufacturing solutions tailored specific to our customer's operations. As your one source for the industry’s top brands all in one place, our engineers specialize in reducing supply chain complexity and are here to provide you with dedicated support from prototype to production.
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