OHMITE Slim-Mox / Ultra-Mox alternatives — cross-references, applications, and supply-ready options

Executive summary. HVC's HVR thick-film high-voltage resistors target the same applications as OHMITE Slim-Mox, Ultra-Mox, and related series, with competitive TCR/VCR, flexible resistance and tolerance, and typically shorter lead times and lower MOQs. This article walks through a CT high-voltage divider case, summarizes OHMITE-to-HVC cross references, and compares supply attributes. For the broader replacement narrative and product hub, see Beyond Replacement: HVC High-Voltage Resistors vs. EBG / OHMITE.

Introduction

In high-voltage electronics, resistor choice directly affects accuracy, drift, safety, and total cost of ownership. Medical imaging, industrial metrology, and power electronics all need dividers and sense elements that stay stable under voltage and temperature.

Below we use one detailed case study (CT tube supply and divider network at 60 kV class), then provide OHMITE cross-reference tables, application snapshots, part numbering, and a supply comparison. The appendix lists 100 OHMITE Slim-Mox style part numbers for quick lookup.

Case Study: High-Voltage Divider Network for Medical Imaging (CT)

Context

A medical OEM builds CT systems where the X-ray tube runs at 60 kV class. The high-voltage divider must keep ratio accuracy over temperature and time; weak TCR/VCR shows up immediately as image artifacts and calibration drift.

Key materials and process

• Ruthenium oxide (RuO₂) thick film, fired at 850 °C; operating range commonly −55 °C to +225 °C (subject to final datasheet).
• 96% alumina substrate — thermal conductivity about 24–28 W/m·K; controlled surface finish (Ra < 0.4 μm) for predictable HV field distribution.
• Environmental robustness — suitable for industrial/medical environments; validate against your damp-heat / bias-HAST requirements.

OHMITE Model Cross-Reference

Use these tables to map OHMITE Slim-Mox, Ultra-Mox, and ARC2/MOX lines to HVC HVR GFP/GXP/BSP families. Always confirm pinout, clearance, and datasheet ratings for your voltage class.

Slim-Mox Series (High-Voltage Resistor)

Ultra-Mox Series

ARC2 / MOX Series

Application Snapshots

CT / medical imaging (60 kV class)

High-voltage dividers for tube monitoring and feedback: prioritize low TCR/VCR and long-term ratio stability.

Precision measurement (high-ohm, low-drift)

Metrology and industrial analyzers: tight tolerance and TCR matter more than peak power.

Industrial environments (temperature swing)

Outdoor or factory equipment: ratio stability over −40 °C to +85 °C and aging.

HVC Part Numbering Guide

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

Example: SLIM-MOX 102 → HVR-GFP-102-10M-F-0.5W-5kV (illustrative; confirm with factory for your exact grade).

Supply Chain Comparison

Appendix: OHMITE Model Index (100 Part Numbers)

Quick lookup for Slim-Mox style catalog numbers. Map to HVC using the cross-reference tables above.

Contact & Technical Support

If you need alternatives to OHMITE Slim-Mox / Ultra-Mox / ARC2 lines, or help selecting and qualifying HVR parts, HVC engineering can support samples and datasheet-level review.

We provide sample evaluation and manufacturer-level technical support for replacement and new designs.

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Disclaimer: Parameters herein are for reference only; refer to the latest datasheet and any mutually agreed technical specifications for binding values.