IN Brief:
- Stackpole has introduced the RVCU series of high-voltage low-VCR chip resistors.
- The series supports 800 V to 3000 V working voltages across 1206, 2010, and 2512 package sizes.
- Low VCR performance targets precision divider, sensing, medical, LED lighting, communications, and test equipment designs.
Stackpole Electronics has introduced the RVCU series of high-voltage chip resistors for precision voltage divider, sensing, and measurement circuits requiring stable performance across changing voltage and environmental conditions.
The RVCU series is available in 1206, 2010, and 2512 package sizes, with maximum working voltages from 800 V to 3000 V. The parts are offered with tolerances down to 0.5%, a temperature coefficient of resistance of 100 ppm, and a specified voltage coefficient of resistance from 25 ppm to 50 ppm depending on resistance value.
Voltage coefficient of resistance is a critical parameter in high-voltage divider and sensing circuits because resistance value can shift as applied voltage changes. In precision measurement, control, or protection designs, that shift can translate directly into voltage-reading error. Stackpole’s RVCU series is designed to reduce that error compared with high-voltage chip resistors that have higher or unspecified VCR values.
The series also uses anti-sulfur construction and supports applications including high-voltage LED lighting, medical equipment, audio/video and communications systems, test and measurement instruments, and high-voltage transmission or control circuits. Compliance with IEC-62368 requirements is listed for values from 75 kΩ to 27 MΩ, placing the parts in compact designs where working voltage, safety, and long-term stability all have to be managed within limited board area.
High-voltage design accuracy does not depend only on active devices. Wide-bandgap switches, compact power stages, high-voltage batteries, isolation devices, and digital control loops often receive more attention, yet the passive divider network is frequently the point at which real-world voltage information enters the control system. If that network drifts with voltage, temperature, contamination, or ageing, the rest of the measurement chain may be accurately processing a flawed input.
That problem is becoming more common as high-voltage electronics move into compact and distributed systems. EV battery packs, charging equipment, solar inverters, energy storage, industrial drives, LED drivers, and medical systems all require voltage monitoring with stable behaviour across operating conditions. Designers have to balance creepage and clearance, surge performance, PCB contamination, resistor derating, self-heating, and ADC front-end requirements, often in layouts where space is limited.
Isolation and sensing are also becoming more tightly connected in high-voltage system design. Components such as Vishay’s high-isolation optocouplers for EV and solar systems address the separation of electrical domains, while low-VCR divider resistors address the accuracy of the measurement entering those protected control paths. Both functions are needed when compact high-voltage equipment has to remain safe, measurable, and predictable over a long service life.
Component choice can also influence calibration strategy. A divider with lower and specified VCR gives engineers a more predictable error budget, reducing the need to compensate for voltage-dependent resistance changes elsewhere in firmware or calibration. In systems that must maintain accuracy over long service intervals, predictable passive behaviour is a practical advantage.
As power electronics voltage levels rise and compact high-voltage architectures become more common, passive component behaviour is harder to treat as a secondary detail. Resistor stability, package size, sulfur resistance, voltage rating, and standards compliance can define whether a sensing circuit remains trustworthy over the life of the product.
