When your application demands precision under extreme electrical stress, a standard resistor simply won’t suffice. Our high-voltage resistor is specifically designed to deliver unmatched performance in demanding environments, supporting continuous operation at voltages up to 48,000 volts (48kV). Ideal for medical imaging systems, high-voltage power supplies, industrial instrumentation, and scientific equipment, this resistor combines robust construction with exceptional long-term stability.
Unlike conventional components, this high-voltage resistor features a non-inductive design, eliminating parasitic inductance that can distort signals in high-frequency or fast-pulse applications. This makes it particularly suitable for X-ray generators, CT scanners, nuclear magnetic resonance (NMR) systems, and other sensitive high-voltage circuits where signal integrity is critical.
One of the standout characteristics of this resistor is its ultra-low temperature coefficient of resistance (TCR). With a typical TCR of ±25 ppm/°C (referenced to 25°C over a range of -15°C to +85°C), it ensures minimal resistance drift even as internal temperature rises due to power dissipation. This thermal stability is essential in applications where consistent performance during warm-up or extended operation is non-negotiable. For even more demanding requirements, lower TCR options are available upon request.
Built to endure harsh conditions, the resistor is rated for a maximum operating temperature of +225°C. It undergoes rigorous testing to meet or exceed industry standards, including MIL-STD-202 for load life, moisture resistance, and thermal shock. After 1,000 hours of operation at rated voltage and temperature (+125°C), resistance change remains within ±0.25%, demonstrating exceptional reliability over time. Additionally, it exhibits excellent overload capability—withstanding 5 times its rated power for 5 seconds (with applied voltage not exceeding 1.5 times the maximum continuous operating voltage) while maintaining ΔR ≤ 0.20%.
Electrical performance is further enhanced by a low voltage coefficient of ≤ -0.2 ppm/V (tested per MIL-STD-202 Method 309 at up to 10kV DC), ensuring resistance stability even under high electric fields. The component also features a dielectric strength of 1,000 V DC and an insulation resistance of at least 10 GΩ at 1,000 V DC, providing robust isolation and safety in high-potential circuits.
The resistor is RoHS compliant, reflecting a commitment to environmental responsibility without compromising performance. Standard units are protected with a silicone conformal coating, while an optional dual-layer polyimide coating is recommended for applications involving oil immersion, potting, or exposure to aggressive chemicals—offering superior dielectric strength and thermal resilience.
Available in a wide resistance range from 100 kΩ to 1 GΩ, with standard tolerances of ±1% to ±10% (and tight tolerances down to ±0.1% available for select values), this high-voltage resistor can be customized to meet precise system requirements. Leads are made of oxygen-free high-conductivity (OFHC) copper with tin plating for excellent solderability and long-term reliability.
In summary, this 48kV high-voltage resistor delivers the perfect balance of high voltage handling, thermal stability, and long-term reliability. Whether you’re designing next-generation medical diagnostics equipment, high-energy physics instrumentation, or industrial high-voltage control systems, this component ensures consistent, safe, and accurate performance under the most challenging conditions. Trust a resistor engineered not just to function—but to excel—at the edge of electrical performance.
