Overview
Overview
The high-voltage resistor series uses specialized resistance materials and multi-layer insulation design to operate stably under thousands or even hundreds of thousands of volts — delivering excellent dielectric strength, pulse capability and an extremely low voltage coefficient (VCR). Widely used in X-ray / CT imaging, high-voltage power supplies, energy-storage discharge, lightning surge protection, HV measurement instruments, laser power supplies, electrical testing and other critical applications requiring stable, reliable HV components.
Key Features
Ultra-High Voltage Capability
- Working voltage 1kV ~ 100kV+
- Transient withstand 2× nominal
Low Voltage Coefficient (Low VCR)
- VCR ≤ 5 ppm/V — stable resistance under HV
- Ideal for precision measurement and HV dividers
High Pulse & Discharge Tolerance
- Withstands tens of joules of single-pulse energy
- Suitable for X-ray, laser and energy-storage discharge applications
Multi-Layer Insulation
- Epoxy / silicone / ceramic composite insulation
- Anti-creep and anti-partial-discharge (PD) design
Wide Operating Temperature Range
- Operating temperature -55°C ~ +200°C
- Suitable for thermal-cycling and vibration environments
Flexible Customization & Packaging
- Cylindrical, planar (chip) and modular packages
- Custom resistance, leads and form factors
Applications
Typical Applications
X-ray / CT
HV Power Supply
Energy-Storage Discharge
Laser Power Supply
HV Measurement
Lightning Surge Protection
Compare High Voltage Resistor Models
Side-by-side specs for every model in this family — power range, resistance range, tolerance, operating temperature and key applications.
| Specification | Custom ResistanceCylindrical Glass Glaze High-Voltage Resistor | Custom ResistanceNon-Inductive High-Voltage Thick-Film Resistor | Custom ResistanceHigh-Power Glaze-Film Composite High-Voltage Resistor |
|---|---|---|---|
| Product Name | — | — | — |
| Series Model | — | — | — |
| Power Range | 50W ~ 500W (standard) / 1000W (special order) | 50W ~ 500W (standard) / 1000W (special order) | 50W ~ 500W (standard) / 1000W (special order) |
| Resistance Range | 1Ω ~ 1000GΩ | 1Ω ~ 1000GΩ | 1Ω ~ 1000GΩ |
| Tolerance | D ±0.5% / F ±1% / G ±2% / J ±5% / K ±10% | D ±0.5% / F ±1% / G ±2% / J ±5% / K ±10% | D ±0.5% / F ±1% / G ±2% / J ±5% / K ±10% |
| Voltage Coefficient | — | — | — |
| Voltage Rating | 30KV ~ 120KV | 30KV ~ 120KV | 30KV ~ 120KV |
| Base Material | — | — | — |
| Cap Material | — | — | — |
| Lead Material | — | — | — |
| Applicable Standards | GB/T 5727-2003 | GB/T 5727-2003 | GB/T 5727-2003 |
| Characteristics | — | — | — |
| Product Series | — | — | — |
| Product Type | High-Power Glaze-Film Composite High-Voltage Resistor · high-voltagethick-filmprofessional grade | High-Power Glaze-Film Composite High-Voltage Resistor · high-voltagethick-filmprofessional grade | High-Power Glaze-Film Composite High-Voltage Resistor · high-voltagethick-filmprofessional grade |
| Maximum operating voltage | — | — | — |
| Pulse voltage | — | — | — |
| Process | Serpentine-printed resistor film (high power · high accuracy · wide resistance range) | Serpentine-printed resistor film (high power · high accuracy · wide resistance range) | Serpentine-printed resistor film (high power · high accuracy · wide resistance range) |
| Operating Temperature | -55°C ~ +225°C (derates above 125°C) | -55°C ~ +225°C (derates above 125°C) | -55°C ~ +225°C (derates above 125°C) |
| Custom Dimensions | — | — | — |
| Typical Applications | HV inverters / medical equipment / electrostatic precipitation / pulse modulators / imaging equipment / impulse voltage generators | HV inverters / medical equipment / electrostatic precipitation / pulse modulators / imaging equipment / impulse voltage generators | HV inverters / medical equipment / electrostatic precipitation / pulse modulators / imaging equipment / impulse voltage generators |
| internal Substrate | Over 95-grade ceramic resistor substrate (withstands high voltage · absorbs large energy) | Over 95-grade ceramic resistor substrate (withstands high voltage · absorbs large energy) | Over 95-grade ceramic resistor substrate (withstands high voltage · absorbs large energy) |
| Outer layer is coated with | high-voltageinsulating thermal-dissipation paint (stable in harsh industrial-control environments) | high-voltageinsulating thermal-dissipation paint (stable in harsh industrial-control environments) | high-voltageinsulating thermal-dissipation paint (stable in harsh industrial-control environments) |
| Termination | M6 / M8 / M10 stud | M6 / M8 / M10 stud | M6 / M8 / M10 stud |
| View details | View details | View details | View details |
Frequently asked questions
What voltage range do your high-voltage resistors cover?
Our HV product family runs from 1 kV to 50 kV continuous DC working voltage, with surge ratings to 100 kV. Resistance values 1 kΩ to 1000 GΩ depending on technology — glass-glaze for 1–20 kV, thick-film on ceramic for 5–50 kV, with TCR as low as ±25 ppm/°C for precision divider use. See /products/high-voltage for the full series matrix.
How does voltage coefficient of resistance (VCR) affect HV measurement accuracy?
VCR is the relative resistance change per volt — typically −5 to −50 ppm/V for thick-film. At 30 kV across a 100 MΩ resistor, even −10 ppm/V causes a 0.3% drift, which dominates over tolerance. For precision dividers we offer characterized low-VCR series at <−1 ppm/V, plus matched pair selection so divider ratio drift is canceled. Specify 'precision divider' on inquiry to get full VCR data.
How do you handle surge and impulse loading on HV resistors?
We rate surge in joules with a defined waveshape (typically 1.2/50 µs or 8/20 µs IEC standard). Standard glass-glaze tube resistors handle 0.5–5 J; specialized snubber resistors with helical-cut element absorb 50–500 J without damage. For ESD or capacitor discharge, share peak voltage, capacitance and repetition rate so we can size correctly with safety margin.
What encapsulation options are available for high-voltage resistors?
Standard option is bare glass-glaze tube for oil-immersed or SF6 environments. For air-insulated installations we offer silicone elastomer molding (corona-resistant to 30 kV/mm), epoxy potting in cylindrical or rectangular cans, and silicone-grease-filled metal cylinders for repeated thermal cycling. Each adds creepage and partial-discharge margin; specify your enclosure and altitude for the right choice.
Why is rated power lower than I expect for HV resistors at high voltage?
Two limits apply: thermal (P ≤ V²/R within rated wattage) and dielectric (V ≤ rated voltage). At high resistance values the voltage limit kicks in first — for example a 100 MΩ × 10 W resistor rated 30 kV can only dissipate (30 kV)²/100 MΩ = 9 W, not the full 10 W. Always check both limits when selecting; we publish derating curves for each series.
Sample Request
Sample Request
Standard samples are provided free of charge in reasonable quantities (shipped within 2–3 business days). Custom samples are delivered within 2–4 weeks. Please use the form on the right to tell us:
- Company and contact details
- Target part number or key specs (power / resistance / package)
- Application scenario and estimated annual volume
- Shipping address and expected delivery date
📧 You can also email us directly at info@resistor-factory.cn / 13650089870
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