High Voltage Resistors

High voltage resistors are purpose-engineered components designed to operate safely and stably at supply voltages of 1kV and above — conditions where standard resistors risk arcing, corona discharge, or catastrophic breakdown. At elevated voltages, the critical design challenges extend well beyond power handling to include electric field management, dielectric integrity, and resistance stability across wide voltage and temperature ranges.

RARA high voltage resistors cover supply voltages from 1kV to 90kV and resistance values from 10Ω to 1TΩ, available in five configurations — SMD thick film chip, axial and radial metal glazed, thick film tubular, precision planar, and bleeder and divider assemblies — to suit board-level, through-hole, and chassis-mounted designs. The precision 400 Series achieves tolerances as tight as ±0.05% with TCR as low as 5 ppm/°C, making it one of the most accurate high voltage resistors available at ratings up to 90kV. Non-inductive models are available for RF and pulse applications, and the GBR series provides dedicated bleeder and voltage divider solutions for HVDC and discharge circuits.

Compared to adapting standard resistors for high voltage use, RARA's dedicated HV portfolio eliminates the compromises in voltage coefficient, flashover margin, and long-term stability that define performance in medical imaging, industrial plasma systems, test and measurement equipment, and high voltage power supplies.

Thick film, metal glazed, and tubular resistors engineered for voltages from 1kV to 90kV — available in SMD chip, axial, radial, tubular, and planar configurations for medical, industrial, and high-voltage power supply applications.

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1kV – 90kV
Voltage Range

10Ω – 1TΩ
Resistance Range

5 ppm/°C
Best TCR Available

±0.05%
Tightest Tolerance

Certifications: Up to 90kV l ISO9001 l IATF16949 l Fusible Models l TÜV

What Is a High Voltage Resistor?

A practical overview for engineers and procurement teams evaluating resistive solutions.

A high voltage resistor is specifically engineered to operate safely and stably at supply voltages of 1000V or higher — conditions that would cause arcing, flashover, or catastrophic failure in standard resistors. The design challenge at high voltages is not just power handling, but managing electric field distribution, preventing corona discharge, and maintaining stable resistance values over a wide voltage range.

RARA's high voltage range is manufactured in five configurations — SMD chip, axial, radial, tubular, and planar — to suit circuit board mounting, through-hole designs, and chassis-level installations. Technologies include thick film, metal glazed, and precision non-inductive designs, covering supply voltages from 3kV up to 90kV with resistance values reaching 1 TΩ (1 teraohm).

At the precision end, the 400 Series achieves tolerances as tight as ±0.05% and TCR as low as 5 ppm/°C — among the best available for any high voltage resistor. The HVI series also offers ±1% tolerance and 25 ppm/°C TCR for demanding applications. The GBR bleeder and divider series provides application-specific solutions for voltage division, discharge, and measurement circuits.

Configurations Available

SMD thick film chip (HVTK, SMG)
Axial / radial metal glazed (MGR)
Thick film tubular (HVE, HVI, HVR)
Precision planar (400 Series, HVP)
Bleeder & divider (GBR series)

Key Advantages

Rated to 90kV supply voltage
Resistance up to 1 TΩ
Tolerance as tight as ±0.05%
TCR as low as 5 ppm/°C
Non-inductive models available

RARA high voltage resistors are manufactured in SMD, axial, radial, tubular, and planar configurations — giving engineers the right form factor for every high voltage design challenge from 1kV to 90kV.

Applications

Where RARA high voltage resistors are deployed in the field.

Medical Imaging & X-Ray

High voltage resistors are critical in X-ray generators, CT scanners, and electron microscopes — where supply voltages routinely exceed 50kV. The 400 Series precision non-inductive resistors and HVR tubular series are well-suited to medical HV power supply voltage divider and feedback circuits.

High Voltage Power Supplies

Bleeder resistors, voltage dividers, and feedback network components in HVDC power supplies, laser power supplies, and electrostatic equipment depend on stable, high-resistance components. RARA's GBR bleeder and divider series and HVP planar types are purpose-built for these roles.

Test & Measurement Equipment

High accuracy voltage measurement probes, oscilloscope HV probes, and precision voltage dividers require resistors with very low TCR and tight tolerance. The 400 Series (±0.05%, 5 ppm/°C) and HVI series (±1%, 25 ppm/°C) meet the stability demands of precision metrology instruments.

ESD & Surge Protection

HVTK thick film chip resistors are used in ESD protection circuits and high voltage signal conditioning on PCBs where compact footprint and high voltage standoff are required simultaneously — operating safely at voltages far beyond standard SMD resistor ratings.

Industrial High Voltage Systems

Electrostatic precipitators, plasma generators, ion beam systems, and high voltage test benches use tubular HVE and HVR series resistors for current limiting, voltage division, and discharge functions at supply voltages from 4.8kV up to 80kV.

Telecom & RF High Voltage

Transmitter power supplies, antenna tuning units, and radar systems operate at elevated voltages where standard resistors fail. Metal glazed MGR and SMG series provide stable high resistance values with good HF characteristics for RF and telecom high voltage applications.

Product Series

Select models from our wire wound lineup. Download individual datasheets for full specifications, dimensions, and ordering codes.

High Voltage Resistors

What Is a High Voltage Resistor?

Applications

Product Series

Why Choose RARA High Voltage Resistors