GBR-181 Series High-Voltage Thick Film Resistors
Thick film resistive element on alumina ceramic substrate (Al₂O₃ — 96%)
Rated power 0.5W
Resistance range 0.1Ω to 20MΩ (E24 series values)
Tolerance options ±2% and ±5%
TCR ±50 ppm/°C for R > 1Ω; ±100 ppm/°C for R < 1Ω
Operating temperature −25°C to +85°C
Full epoxy encapsulation by fluidization process
Suitable for general and professional applications
What are the GBR-181 Series High-Voltage Thick Film Resistors?
The GBR-181 is a high-voltage thick film resistor constructed on a 96% alumina ceramic substrate (Al₂O₃), combining the dimensional stability and dielectric strength of ceramic with the precision and consistency of thick film resistive technology. Rated at 0.5W continuous power, the GBR-181 is engineered for applications that demand reliable performance under elevated voltage conditions, offering a robust alternative to conventional carbon film resistors in both general-purpose and demanding professional environments.
The resistance range spans 0.1Ω to 20MΩ using E24 preferred values, providing broad coverage for impedance matching, voltage division, current limiting, and protective circuit functions. Standard tolerance options of ±2% and ±5% are available across the range, with tighter tolerances down to 0.1% offered on request. The temperature coefficient of resistance (TCR) is ±50 ppm/°C for values above 1Ω and ±100 ppm/°C for values below 1Ω, ensuring predictable resistance behaviour across the specified operating temperature range of −25°C to +85°C.
A key feature of the GBR-181 is its fully encapsulated construction: the entire resistive assembly is sealed in epoxy resin using a fluidization process, providing mechanical protection, moisture resistance, and electrical insulation suited to high-voltage environments. This construction approach contributes to the series’ characteristically higher stability and lower noise performance compared to typical carbon resistors, making the GBR-181 appropriate for circuits where signal integrity or long-term resistance stability is a priority.
GBR-181 Series High-Voltage Thick Film Resistors Specifications
A practical overview for engineers and procurement teams evaluating resistive solutions.
Model: GBR-181
Resistor type: High Voltage
Description: Thick film
Power Rating: 0.5W
Resistance (Ω): 0.1~20M
Tolerance (%): ±2, ±5
TCR (ppm/C): 50, 100
Applications of the GBR-181 Series High-Voltage Thick Film Resistors
Where RARA high voltage resistors are deployed in the field.
High-voltage power supply circuits — voltage divider and bleeder resistor networks
Medical imaging and diagnostic equipment — high-voltage bias and protection resistors
Industrial instrumentation and measurement systems — precision voltage sensing and attenuation
Telecommunications equipment — line protection and overvoltage clamping resistors
Test and measurement apparatus — high-impedance probe and attenuator networks
Photomultiplier tube and detector bias circuits — high-voltage chain resistors
Oscilloscope and signal analyser input stages — high-resistance termination networks
Power conversion and rectifier circuits — snubber and damping resistors
Laser power supply units — voltage regulation and discharge resistors
Consumer and industrial electronics — general-purpose thick film resistance where stability and low noise are required
Related Products of the GBR-181 Series High-Voltage Thick Film Resistors
Model: HVP
Resistor type: High Voltage
Description: Thick film planar
Power Rating: 0.5W~4W
Resistance (Ω): 1M~1G
Tolerance (%): ±0.5~±20
TCR (ppm/C): 50~250
Model: GBR-250
Resistor type: High Voltage
Description: Thick film
Power Rating: 2W
Resistance (Ω): 0.1~500M
Tolerance (%): ±10, ±20
TCR (ppm/C): 100
Model: GBR-182
Resistor type: High Voltage
Description: Thick film
Power Rating: 1W
Resistance (Ω): 0.1~20M
Tolerance (%): ±2, ±5
TCR (ppm/C): 50, 100
Model: GBR-183
Resistor type: High Voltage
Description: Thick film
Power Rating: 2W
Resistance (Ω): 0.1-20M
Tolerance (%): ±2, ±5
TCR (ppm/C): 50, 100
Why Choose RARA High Voltage Resistors
What sets RARA apart for engineers and procurement managers in industrial and automotive markets.
01
Widest Voltage Range
From 1kV SMD chip types to 90kV precision planar resistors — RARA's high voltage lineup covers more of the voltage spectrum than virtually any single supplier.
02
Extreme Precision
The 400 Series delivers ±0.05% tolerance and 5 ppm/°C TCR — precision that rivals dedicated metrology components, available at high voltage ratings up to 90kV.
03
5 Form Factors
SMD, axial, radial, tubular, and planar configurations give design engineers the right package for board-level, through-hole, or chassis-mounted high voltage circuits.
04
Global Track Record
Trusted by Toshiba, Siemens, Rockwell, and Schneider Electric — deployed in medical, industrial, and telecom high voltage systems across six continents.
