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We offer a comprehensive portfolio including resistors, braking units, reactors, power filters, and transformers, with full customization options to meet diverse application requirements.
The DUFEW CRR Series Non-Inductive Corrugated Resistor is a high-power passive energy dissipation resistor specially optimized for medium- and high-frequency pulse circuits. Featuring a unique vertical corrugated flat-ribbon non-inductive winding structure, the product offers power ratings from 50W to 10kW, resistance values from 0.01Ω to 1kΩ, three resistance tolerance options, and a maximum operating voltage of 1200V.
Designed with excellent pulse overload capability and stable thermal performance, it is widely used for energy dissipation, current sensing, braking, surge suppression, and load testing in renewable energy systems, industrial automation, and laboratory test equipment worldwide.
| Model Code | Meaning | Description |
| CRR | Series | Non-Inductive Corrugated Resistor |
| 2500W | Rated Power | 2500W |
| 54.4R | Rated Resistance | 54.4Ω |
| J | Resistance Tolerance | J = ±5% (Optional: K = ±10%, H = ±3%) |
| Parameter | Specification |
| Power Range | 50W–10kW |
| Operating Voltage | ≤1200V |
| Resistance Range | 0.01Ω–1kΩ |
| Resistance Tolerance | ±3% / ±5% / ±10% |
| Protection Rating | IP00 |
| Temperature Coefficient (TCR) | ≤300 ppm/°C |
| Flame Retardant Rating | UL 94V-2 |
| Compliance Standard | GB/T 5792 |
Manufactured from one-piece high-alumina insulating ceramic, the hollow core features an internal convection air channel for efficient heat dissipation. It provides excellent vibration resistance and maintains stable insulation performance at temperatures up to 350°C. The ceramic structure withstands repeated high- and low-temperature cycling without cracking.
The flat alloy ribbon is precision-stamped into a continuous corrugated profile, providing an exceptionally low temperature coefficient of resistance (TCR). Two alloy materials are available to suit different applications: Nickel-Chromium (Ni-Cr) for continuous high-power braking and energy dissipation, and Constantan for precision low-current sensing circuits.
The end clamps, terminal posts, and mounting brackets are manufactured from thickened stainless steel with a passivated anti-corrosion finish. The assembly passes a 45N terminal pull test without loosening, offers excellent resistance to soldering heat, and minimizes contact heating caused by oxidation.
Using a dual-wire reverse non-inductive winding technique, the equivalent series inductance (ESL) can typically be controlled below 10nH, making the resistor suitable for high-frequency switching circuits operating at frequencies up to 100kHz.
●Extremely Low Inductance – The corrugated structure combined with reverse non-inductive winding effectively eliminates self-inductance, suppresses high-frequency oscillation and voltage spikes, and protects power semiconductor devices.
●Excellent Heat Dissipation – The vertical corrugated design increases the cooling surface area, while the ceramic core provides efficient thermal conduction, enabling higher power density and lower temperature rise.
●Outstanding Overload Capability – Withstands 10× rated power for 5 seconds without visible damage, making it ideal for braking and surge absorption applications.
●Long Service Life – Cyclic load life exceeds 9,000 hours (10s discharge / 90s interval), with aging-resistant coating and a deformation-free ceramic core.
●Environmentally Friendly – Inorganic eco-friendly coating produces no smoke, no toxic gases, and complies with RoHS and UL safety requirements.
●Flexible Customization – Resistance value, power rating, dimensions, terminal orientation, and mounting brackets can all be customized according to drawings or specifications.
Energy storage converters, photovoltaic inverters, wind turbine pitch control systems, battery pack aging test loads, DC fast charging pre-charge and discharge resistors.
Medium- and high-frequency variable frequency drives, servo drive regenerative braking, port cranes, elevators, rolling mills, wire drawing machines and textile equipment, energy dissipation systems.
High-frequency power load banks, pulse signal test benches, power supply aging systems, precision current sensing, snubber and damping resistors.
CNC wire-cut EDM machines, arc welding equipment, stage lifting and lighting systems, centrifuges, paper machinery and stacker-reclaimers.
High-frequency current limiting, motor starting resistors, medium-voltage cabinet surge energy absorption.
DUFEW specializes in the R&D and manufacturing of power electronic components, delivering reliable products and integrated solutions for industrial users, distributors, and OEM customers.
We offer a complete range of power electronic products, including resistors, braking units, reactors, transformers, filters, and load bank systems, providing one-stop sourcing for diverse application needs.
Strict manufacturing processes, modern production lines, and rigorous quality control ensure consistent product performance, long service life, and dependable operation.
Customized resistance values, power ratings, dimensions, terminal configurations, and mounting options are available to meet your specific technical requirements.
Efficient production management and responsive technical support help shorten lead times and provide reliable assistance from product selection to after-sales service.
| Characteristic | Test Conditions | Performance |
| Dielectric Withstand Voltage | 2500VAC / 50Hz / 60s | Leakage current ≤10mA |
| Insulation Resistance | 1000VDC | ≥100MΩ |
| Short-Time Overload | 10× rated power for 5s | No visible damage |
| Long-Term Load Life | Cyclic operation (10s on / 90s off) | 9,000 hours |
| Steady-State Damp Heat | 40°C ±2°C, 90–95% RH, 100h | ΔR ≤ ±(1%R + 0.05Ω) |
| Rapid Temperature Change | -55°C / 55°C / 155°C, 15 min each, 5 cycles | ΔR ≤ ±(2%R + 0.05Ω) |
| Heat Resistance | 350°C / 2h | No obvious discoloration or damage |
| Temperature Coefficient | Rated-load resistance vs. static resistance | <300 ppm/°C |
| Flame Resistance | 10× rated power for 5 min | Red-hot without open flame |
| Characteristic | Test Conditions | Performance |
| Terminal Strength | 45N / 30s | No looseness or visible damage |
| Vibration Resistance | 5–200Hz, 1g, 98m/s² | No visible structural damage |
| Resistance to Soldering Heat | Terminals immersed in 350±5°C solder for 3s | ΔR ≤ ±(1%R + 0.05Ω) |
| Solderability | Terminals immersed in 235±5°C solder for 5s | Solder coverage ≥95% |
| Comparison Item | Non-Inductive Corrugated Resistor | Conventional Resistors (Carbon Film / Metal Film / Standard Wirewound) |
| Design Purpose | Optimized for high-frequency pulse, VFD braking, and regenerative energy dissipation | Designed for general low-signal and constant-power applications |
| Parasitic Inductance Suppression | Reverse interleaved corrugated winding reduces inductance to less than one-tenth of conventional wirewound types | No active inductance suppression; standard wirewound designs have high parasitic inductance |
| Pulse Response | Fast pulse response with minimal voltage tailing | Noticeable inductive energy storage and voltage tailing |
| Harmonic & Spike Suppression | Significantly reduces harmonic interference and voltage spikes | High inductance can amplify pulse spikes and signal distortion |
| Thermal Cycling & Aging | Uniform thermal stress distribution; resistance drift ≤1% under long-term cycling | Film peeling and excessive resistance drift under frequent thermal cycling |
Q1: Does the non-inductive design affect power rating or resistance accuracy?
A: No. The non-inductive winding method only changes the magnetic field distribution of the current path. It does not negatively affect the resistivity, heat dissipation capability, or power capacity of the alloy ribbon. Resistance tolerance and temperature coefficient remain the same as the standard version.
Q2: How can I determine whether a non-inductive version is required?
A: If your circuit uses high-frequency PWM control, fast IGBT switching, or experiences overvoltage ringing and waveform distortion, the non-inductive version is recommended. For ordinary 50/60Hz braking applications, a standard corrugated resistor is usually sufficient.
Q3: Can special resistance values or dimensions be customized?
A: Yes. DUFEW provides full customization, including resistance values beyond 0.01Ω–1kΩ, power ratings, ceramic tube length and diameter, terminal positions, and mounting bracket configurations. Samples can be produced quickly based on drawings or specifications.
Q4: What should be done if resistance drift exceeds the tolerance range after long-term use?
A: Prolonged high-temperature oxidation, high humidity, and frequent overloads can damage the alloy ribbon. If the insulation resistance falls below 100MΩ, replacement is recommended. Improving cabinet ventilation and selecting a resistor with sufficient power margin can significantly extend service life.
Whether you need a standard model or a fully customized solution, DUFEW's engineering team is ready to help. Send us your drawings or technical specifications to receive professional recommendations and a fast quotation.
We support:
✔ OEM
✔ ODM
✔ Custom resistance
✔ Custom dimensions
✔ Custom terminals
✔ Small trial orders
Contact DUFEW today for technical consultation or a quotation.
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No. 364, Kangyang Road, Huangdai Town, Xiangcheng District, Suzhou City, Jiangsu Province, China
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