Auxilliary Equipment
PR-Series Resistors
The Danotherm PR-Series is a range of precision power resistors specifically engineered for applications requiring extremely low inductance, high pulse energy capability, and excellent long-term stability. Designed to meet the demands of modern power electronic systems, the PR-Series is ideally suited for high-frequency switching applications where conventional wirewound resistor technologies can introduce unwanted parasitic inductance and compromise performance.
PR-SERIES RESISTORS
Precision Ultra-Low Inductance Resistors for High-Frequency Power Conversion
By combining precision resistance characteristics with robust thermal and electrical performance, the PR-Series provides a reliable solution for power conversion, semiconductor protection, energy discharge, and transient suppression applications.
PR-SERIES RESISTORS
Engineered for High-Frequency Switching Environments
As switching frequencies in modern IGBT, MOSFET, and SiC-based power electronic systems continue to increase, the influence of parasitic inductance becomes increasingly significant. Excessive inductance can contribute to voltage overshoot, switching losses, electromagnetic interference (EMI), and reduced system efficiency.
The Danotherm PR-Series is specifically designed with an ultra-low inductance resistor element, minimising parasitic effects and enabling reliable operation in fast-switching power circuits.
Technical Advantages
Ultra-low inductance construction
High pulse load and surge energy capability
Low resistance tolerance options
Excellent temperature stability
High power density
Superior transient response characteristics
Robust mechanical construction for industrial environments
Long operational life under repetitive load conditions
PR-SERIES RESISTORS
Applications
Snubber and Damping Networks
The PR-Series is particularly suited to snubber circuits used to protect semiconductor devices from switching transients. Its low inductance characteristics enable effective voltage spike suppression while minimising ringing and oscillation within the circuit.
Typical applications include:
IGBT snubber networks
MOSFET protection circuits
RC and RCD snubber assemblies
Pulse forming networks
Power Conversion Equipment
Precision resistor performance is critical in modern power conversion systems where efficiency, stability, and repeatability directly affect system performance.
Common installations include:
Variable Frequency Drives (VFDs)
Soft starters
DC/DC converters
AC/DC power supplies
UPS systems
Grid-connected inverters
Renewable Energy and Energy Storage
The increasing adoption of high-frequency power conversion technologies in renewable energy systems has created greater demand for low-inductance resistor solutions.
Applications include:
Solar inverter protection circuits
Battery Energy Storage Systems (BESS)
Bidirectional converters
EV charging infrastructure
Energy management systems
Rail and Transportation
The PR-Series is also widely utilised within rail and transportation power electronics where reliability and thermal performance are critical.
Typical uses include:
Auxiliary power converters
Traction electronics
Dynamic braking controls
On-board power management systems
PR-SERIES RESISTORS
High Pulse Energy Capability
The PR-Series has been developed to withstand repetitive pulse loads and transient energy events commonly encountered in power electronics. The resistor technology provides excellent energy absorption characteristics while maintaining resistance stability, making it particularly suitable for semiconductor protection and controlled energy dissipation.
Applications benefiting from high pulse capability include:
Capacitor discharge circuits
Crowbar protection systems
Current limiting networks
Surge suppression systems
Dynamic braking controls
PR-SERIES RESISTORS
Thermal Stability and Reliability
In power electronic systems, resistor performance is often heavily influenced by operating temperature. The Danotherm PR-Series is designed to maintain stable electrical characteristics across demanding thermal conditions, ensuring predictable circuit behaviour throughout the equipment lifecycle.
The result is:
Reduced resistance drift
Improved control accuracy
Enhanced power system reliability
Lower maintenance requirements
Extended service life
PR-SERIES RESISTORS
Key Selection Benefits
When specifying resistor technology for high-frequency power applications, the Danotherm PR-Series offers several performance advantages over conventional resistor designs:
| Characteristic | Engineering Benefit |
|---|---|
| Ultra-low inductance | Reduced switching transients and EMI |
| High pulse energy rating | Improved semiconductor protection |
| Precision resistance values | Accurate circuit operation |
| Excellent thermal stability | Consistent long-term performance |
| High power density | Compact system integration |
| Industrial-grade construction | Enhanced reliability in harsh environments |
PR-SERIES RESISTORS
Technical Support and Application Assistance
Selecting the correct resistor requires consideration of continuous power dissipation, pulse energy, resistance value, duty cycle, cooling conditions, and environmental factors. Cynebar provides technical support for the specification and integration of Danotherm PR-Series resistors into new and existing power electronic systems.
Our team can assist with:
Resistor sizing and selection
Pulse energy calculations
Short-time overload analysis
Snubber circuit optimisation
Thermal management considerations
Custom resistor solutions for OEM applications
PR-SERIES RESISTORS
Danotherm PR-Series from Backer Cynebar Ohmic
For engineers designing high-performance power electronic systems, the Danotherm PR-Series delivers the low inductance, pulse handling capability, and long-term reliability required in today's demanding applications. Whether used in industrial drives, renewable energy systems, semiconductor protection circuits, or energy storage applications, the PR-Series provides a technically advanced resistor solution for critical power conversion environments.
Contact Backer Cynebar Ohmic for technical advice, product availability, and assistance in specifying the optimum Danotherm PR-Series resistor for your application.
FAQ
Frequently asked questions
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