Abstract: Facing increasingly extended lead times or obsolescence challenges for 3RLAB high voltage resistors, HVC Capacitor offers a comprehensive alternative solution based on its HVR series. This technical guide provides detailed cross-reference tables and selection recommendations, enabling engineers in medical imaging, high-voltage power supplies, and scientific research to achieve 100% compatible "drop-in replacements," ensuring high performance while optimizing supply chain costs.

1. Why Seek Alternatives?

High voltage resistors are critical components in medical CT/X-ray systems, industrial high-voltage power supplies, and precision instruments. However, recent supply chain data indicates that some international brands (e.g., 3RLAB) are facing the following challenges:

• Extended Lead Times: Standard product lead times often reach 10-14 weeks, severely impacting production schedules.
• Service Barriers: Slow response times for small-batch or customized requirements.
• Cost Pressure: Persistently high long-term procurement costs.

HVC's Solution:
HVC HVR series utilizes advanced Ruthenium Oxide thick film technology, not only matching 3RLAB products in electrical performance (withstanding voltage, precision, TCR) but also maintaining consistent physical dimensions. This ensures customers can achieve direct replacement without modifying existing PCB layouts.

2. Core Model Cross Reference Table

The data in the table below is derived from HVC Technology Center's actual measurements and comparisons. HVC products (HVRBOP/HVRBSP series) fully cover the power and voltage ranges of the 3RLAB HTE series, offering higher voltage withstand margins for the same dimensions.

2.1 Axial Leaded - Replacing 3RLAB HTE/HS Series

2.2 Tubular High Power - Replacing 3RLAB UT Series

Technical Tip: HVC replacement models (such as HVRPFS series) are designed with 96% alumina substrate, providing superior thermal conductivity compared to competitors, effectively reducing "hot spot" temperatures during high-power operation, thereby minimizing resistance drift.

3. Key Selection Parameter Checklist

To ensure the replacement works perfectly in your system, please verify the following 7 key parameters during selection:

1. Resistance Value

   • Confirm that the nominal resistance value is consistent. HVC can provide any custom resistance value beyond the E96 series (200Ω ~ 10GΩ).

2. Voltage Rating

   • Key point: Consider both continuous working voltage (DC) and pulse voltage. HVC products typically maintain a safety margin of 1.2x or higher.

3. Power Rating

   • Ensure that the HVC product's power rating is equal to or greater than the original model.

4. Dimensions

   • Critical: Verify the resistor body length (L) and diameter (D), as well as lead spacing (Pitch). HVR series offers multiple standard dimensions that perfectly match existing PCB mounting holes.

5. Tolerance

   • Full range available from precision grade (±0.1%, ±0.5%) to standard grade (±1%, ±5%).

6. Temperature Coefficient (TCR)

   • For outdoor or high-temperature environments, TCR is critical for drift. HVR series standard offerings include low TCR options from ±15ppm/°C to ±100ppm/°C.

7. Voltage Coefficient (VCR)

   • In high-voltage applications, resistance decreases slightly as voltage increases. HVC has optimized the paste formulation to significantly reduce VCR effects, ensuring linearity at high voltages.

4. Why HVC HVR Series is the Better Choice?

Choosing HVC is not just selecting a replacement model—it's choosing a more stable supply chain guarantee:

• Materials Science Advantage: Uses European imported ruthenium-based paste and 850℃ high-temperature sintering process, eliminating long-term aging drift from the microstructural level.
• 100% Compatibility: Not only do electrical parameters match, but mechanical dimensions also strictly follow industry standards, requiring no circuit board redesign.
• Fast Delivery: Ample standard product inventory, custom products delivered in just 3-4 weeks (compared to 12+ weeks from competitors), helping you seize market opportunities.
• Cost Advantage: Thanks to efficient production management, bulk procurement costs are typically 15%-20% lower than 3RLAB.

5. Get Samples and Specifications

Don't let stock shortages hinder your project progress. Contact the HVC technical team immediately for one-on-one replacement selection advice.

We need you to provide:

• The complete 3RLAB model number you are currently using.
• Application scenario (e.g., high-voltage voltage division, RC snubber, discharge circuit, etc.).
• Target resistance and voltage requirements.

Cross Reference List

Cross Reference Table 1

Cross Reference Table 2

Disclaimer: 3RLAB® is a registered trademark of its respective owners. This document is intended for technical comparison and replacement selection reference only and does not imply any affiliation between HVC and the brand.