1. Executive Summary

For high-voltage power electronics and precision measurement, component stability and long-term reliability are critical. OHMITE Slim-Mox and Ultra-Mox have long been benchmark products.

As global supply chains remain volatile, OHMITE lead times of 20-30 weeks can create project risk. HVC's HVR series uses RuO2 thick-film technology on 96% Al2O3 substrate to provide pin-to-pin compatible replacement options.

Key metrics include TCR +/-15 ppm/ degC and VCR 0.1 ppm/V, with standard lead time around 4 weeks.

2. Core Technical Specifications and Materials Science Competition

HVC goes beyond functional substitution by optimizing materials and process windows to improve reliability under high-voltage and high-stress conditions.

2.1 Key Electrical Parameters Comparison Table

The HVR series maintains strong linearity and low noise in high-voltage operation. Core parameters are summarized below:

2.2 In-Depth Analysis of Material Systems

• Ruthenium Oxide Conductive Phase (RuO2):

HVC uses micron-level ruthenium oxide paste. During the 850 degC high-temperature sintering process, RuO2 particles undergo complex physical and chemical reactions with the glass phase, forming a highly stable three-dimensional conductive network. This process ensures that the resistor maintains excellent linearity in a wide temperature range of -55 degC to +155 degC. For high-voltage systems, this material stability greatly reduces nonlinear distortion under high voltage.

• 96% High-Purity Alumina (Al2O3) Substrate:

The substrate is the "foundation" of high-voltage resistors.

• Thermal Management Capability: With thermal conductivity of 20-30 W/(m·K), it can effectively and rapidly dissipate heat generated by the resistor body, avoiding "hot spots" and suppressing resistance drift.
• Surface Precision: Roughness Ra < 0.4 μm. This extremely high flatness supports ultra-precision screen printing technology, which is the mechanical foundation for achieving +/-15 ppm/ degC ultra-low temperature drift.
• Dielectric Strength: 15-20 kV/mm. This provides robust insulation protection for the 60kV operating voltage.

3. OHMITE Model Alternative Cross-Reference Guide

The HVC HVR series aims to achieve "seamless replacement," meaning customers can directly complete upgrades without modifying any PCB layout or mechanical brackets.

3.1 Slim-Mox 100 Series Alternative (Precision/Miniature)

Compact alternatives designed for laboratory instruments and portable high-voltage sources:

3.2 Slim-Mox 200 Series Alternative (General/Medium Power)

The most widely used model series in medical high-voltage power supplies (such as X-ray power supplies):

3.3 Slim-Mox 300 Series Alternative (High Power/Ultra-High Voltage)

Enhanced models designed for CT scanners, industrial flaw detection, and high-power power supplies:

4. Key Application Areas and Engineering Value

4.1 Medical Imaging: CT and X-Ray Systems

Medical imaging feedback circuits require tight resistor stability and low drift:

• Precise Dose Control: The +/-15 ppm/ degC ultra-low TCR ensures that resistance does not fluctuate significantly with temperature, thereby precisely maintaining X-ray tube voltage output and reducing imaging artifacts.
• Low-Noise Characteristics: The HVR series has current noise below 0.1 μV/V, greatly improving the signal-to-noise ratio of the acquisition system.
• Long-Term Stability: After 1000 hours of load aging tests, resistance drift is less than +/-0.5%, ensuring extremely long maintenance cycles for medical equipment.

4.2 Precision Measurement: High-Voltage Probes and Voltage Dividing Networks

High-voltage probes and divider networks depend on voltage linearity for measurement accuracy:

• Linearity Guarantee: With an extremely low voltage coefficient (VCR) of 0.1 ppm/V, HVR resistors maintain perfect linearity between zero voltage and full-load voltage. This means instruments can achieve extremely high measurement accuracy without complex backend nonlinear algorithm compensation.
• Reduced Parasitic Inductance: The ability to achieve 4 GΩ resistance in a single component reduces the number of series resistors in the circuit, thereby reducing the impact of distributed capacitance on high-frequency sampling waveforms.

5. Agile Supply Chain: Strategic Significance of 4-Week Delivery

With frequent supply disruptions, delivery speed directly impacts project execution.

• Rapid Response: Compared to OHMITE and other European and American brands with delivery cycles of 20-30 weeks, HVC, by introducing CNC laser precision cutting technology and optimized production scheduling at the manufacturing end, commits to delivering standard models within 4 weeks.
• Flexible Customization (Low MOQ):
• No Mold Opening Required: Supports custom shape requirements for any substrate, with a minimum order quantity as low as 100 pieces.
• 1:1 Physical Replication: For established projects that do not want to modify PCBs, HVC provides 100% mechanical dimensional matching service to achieve "seamless" replacement.

6. OHMITE Full Series Model Detailed Comparison Table

The table below summarizes OHMITE high-voltage thick film resistor families (Slim-Mox, Ultra-Mox, ARC2, and MOX).

A. Slim-Mox Series (Flat Type High Voltage Resistors)

Table Header Legend: OHMITE Part Number | Power(W) (Rated Power) | Operating Voltage(kV) (Max Withstand Voltage) | A(mm) (Length) | B(mm) (Width) | C(mm) (Lead Spacing) | Thickness(mm) (Substrate Thickness) | d(mm) (Lead Diameter) | HVC Alternative Part Number

B. Slim-Mox Series (Compact Type)

Table Header Legend: OHMITE Part Number | Power(W) | Operating Voltage(kV) | A(mm) | B(mm) | C(mm) | Thickness(mm) | d(mm) | HVC Alternative Part Number

C. Ultra-Mox Series (Ultra High Power)

Table Header Legend: OHMITE Part Number | Power(W) | Operating Voltage(kV) | A(mm) | B(mm) | C(mm) | HVC Alternative Part Number

D. ARC2 Tubular Resistor Series

Table Header Legend: OHMITE Part Number | Power(W) | Operating Voltage(kV) | A(mm) | B(mm) | C(mm) | HVC Alternative Part Number

E. MOX Tubular Resistor Series

Table Header Legend: OHMITE Part Number | Power(W) | Operating Voltage(kV) | A(mm) | B(mm) | C(mm) | HVC Alternative Part Number

7. OHMITE Complete Model Quick Reference Table (100+ Models)

The following is the complete standard model list of OHMITE high voltage thick film resistors:

Note: The above models are all standard products of OHMITE high voltage thick film resistors. FE indicates 1% tolerance, JE indicates 5% tolerance. For detailed specifications of specific models, HVC alternatives, or free samples, please contact HVC sales team: sales@hv-caps.com

6. Conclusion

HVC's HVR series high voltage thick film resistors are not only a high-performance technical component but also a strategic defense line for global OEM manufacturers to address supply chain uncertainty. Through meticulous work in materials science (RuO2 + 96% Al2O3) and the ultimate pursuit of delivery service, HVC has already achieved engineering-level transcendence over traditional European and American international solutions.

Currently, this product has passed internal strict validation from multiple Fortune 500 companies. If you are looking for solutions that can solve delivery troubles without compromising on performance, the HVC engineering team will provide you with full-process support from selection evaluation to sample testing.

Contact Us for Technical Support

Email: sales@hv-caps.com

Website: www.hv-caps.com

The HVC engineering team is ready to provide you with professional Cross-Reference reports and customized selection guidance at any time.

6. HVC Part Number Coding Rules

HVR-[Series]-[Size]-[Resistance]-[Tolerance]-[Power]-[Voltage]

Ordering Example: Alternative to SLIM-MOX 102 → `HVR-GFP-102-1M-F-0.5W-5kV`

7. OHMITE Complete Model Quick Reference Table

OHMITE Slim-Mox / Ultra-Mox Series Complete Model List (100 Typical Models):