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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.
Suzhou Dufew Electrical Co., Ltd. is a professional power electronics components manufacturer in China, providing customized resistor solutions for industrial automation, motor drive systems, renewable energy, and power control applications.
The Aluminum Clad Resistor Box is a combined resistor solution designed by integrating multiple aluminum housed resistors through series and parallel configurations and installing them inside a dedicated enclosure. It effectively solves the limitation of insufficient power capacity from a single resistor while providing safer installation and easier maintenance.
The resistor box supports a maximum power rating of 30KW, resistance range from 0.01Ω to 1KΩ, and selectable resistance tolerance of ±3%, ±5%, and ±10%.
The enclosure is manufactured with aluminum-zinc coated steel sheet, providing excellent structural strength, corrosion resistance, and heat dissipation performance. The integrated design includes a high-current terminal block and temperature protection switch, while cooling fans and independent resistor group control can be added according to customer requirements.
The internal structure consists of multiple aluminum housed resistors connected through series and parallel circuits and integrated into a durable metal enclosure. Each resistor unit works as an independent heat dissipation element, while the enclosure provides mechanical protection and improves installation safety in industrial environments.
The integrated terminal block allows convenient electrical connection, and the built-in temperature protection switch provides additional safety by disconnecting the circuit when abnormal temperature conditions occur.
Compared with separately installed resistors, the integrated design offers higher power density, improved environmental protection, cleaner wiring arrangement, easier installation and maintenance, and more stable operation under demanding working conditions.
Optional configurations include cooling fan systems, independent resistor group control, customized protection levels, special enclosure designs, and OEM manufacturing based on customer drawings.
Multiple aluminum housed resistors are combined through series and parallel connections, achieving a maximum power capacity of 30KW in a single enclosure.
Protection grades can be customized according to different installation environments, including industrial workshops, control cabinets, and outdoor equipment applications.
Equipped with a dedicated terminal block and temperature protection switch, ensuring safer operation and preventing damage caused by overheating.
The aluminum-zinc coated steel enclosure provides reliable heat dissipation performance while maintaining a clean and professional appearance.
Cooling fans, resistor group control, and customized electrical configurations are available according to application requirements.
The integrated enclosure design simplifies installation, wiring, inspection, and replacement of internal resistor modules.
The Aluminum Clad Resistor Box is widely used in industrial applications requiring reliable energy dissipation and braking control.
Used for absorbing regenerative energy generated during motor deceleration and preventing DC bus overvoltage.
Provides stable resistance load solutions for energy management and electrical testing applications.
Suitable for frequent acceleration and braking cycles requiring reliable thermal performance.
Provides stable braking performance for cranes, hoists, and material handling equipment.
Used in customized testing systems requiring accurate and stable resistive loads.
Example: CRB 10KW 13.6R J
| Code | Description |
|---|---|
| CRB | Braking Resistor Box |
| 10KW | Rated Power |
| 13.6R | Rated Resistance |
| J | Resistance Tolerance (K=10%, J=5%, H=3%) |
| Parameter | Specification |
|---|---|
| Power Range | 1KW-30KW |
| Working Voltage | ≤1200V |
| Resistance Range | 0.01Ω---1KΩ |
| Resistance Tolerance | ±3/±5/±10 |
| Protection Grade | IP20/IP23 |
| Temperature Coefficient | ≤300 ppm/℃ |
| Flame Retardant Grade | UL 94V-2 |
| Standard Compliance | GB-5792 |
The Aluminum Clad Resistor Box is manufactured with high-quality resistor elements and strict quality control processes to ensure stable electrical performance under demanding industrial operating conditions.
| Electrical Characteristics | Test Conditions | Performance |
|---|---|---|
| Dielectric Strength | 2500VAC/50Hz/60S | Leakage current ≤10mA |
| Insulation Resistance | 1000VDC | Insulation resistance ≥100MΩ |
| Short-Time Overload | 10 times rated power 5S | No visible damage |
| Long-Term Load Life | Cyclic operation (Discharge 10S, Interval 90S) | More than 9000h |
| Steady-State Damp Heat | 40℃±2/90%-95%RH/100h | △R≤±（1%R+0.05Ω） |
| Rapid Temperature Change | -55℃, 55℃, 155℃ each for 15 minutes, 5 cycles | △R≤±（2%R+0.05Ω） |
| Heat Resistance | 350℃/2h | No obvious discoloration or damage |
| Temperature Coefficient | Comparison between resistance under rated load and static resistance | Less than 300 ppm/℃ |
| Flame Retardancy | 10 times rated power for 5 minutes | Red glow but no flame |
The enclosure structure and internal mounting design provide reliable mechanical strength for industrial applications, including vibration environments and frequent maintenance operations.
| Mechanical Characteristics | Test Conditions | Performance |
|---|---|---|
| Terminal Strength | 45N/30S | No loosening or visible damage |
| Vibration Resistance | 5-200Hz、1g、98m/S² | No visible structural damage |
| Soldering Heat Resistance | Lead terminal immersed in 350±5℃ solder for 3S | △R≤±（1%R+0.05Ω） No visible external damage, clear marking |
| Solderability | Terminal immersed in 235±5℃ solder for 5S | Terminal surface solder coverage ≥95% |
Suzhou Dufew Electrical Co., Ltd. combines professional engineering experience, standardized manufacturing processes, and strict quality control systems to provide reliable power electronics components for global industrial customers.
As a professional power electronics components manufacturer in China, Dufew focuses on the development and production of resistors, braking systems, reactors, transformers, and power filters.
Our manufacturing advantages include:
Dufew provides customized electrical solutions based on different application requirements, including resistance value, power rating, enclosure structure, cooling design, and installation conditions.
From raw material selection and component assembly to final testing, every production stage follows strict manufacturing procedures to ensure consistent product performance.
Each product undergoes electrical and mechanical performance testing before delivery, including insulation resistance, dielectric strength, overload capability, temperature performance, and structural reliability tests.
Dufew supports OEM and customized production for different industrial applications, helping customers achieve optimized resistor solutions for their systems.
Dufew Electric focuses on industrial electrical components and power control solutions, with engineering experience in braking systems, motor drives, automation equipment, and energy management applications.
Dufew provides flexible configurations according to different application requirements, including resistance values, power ratings, enclosure designs, cooling fan options, protection levels, and special industrial solutions.
Through strict material selection, precision manufacturing, and comprehensive performance testing, Dufew ensures stable operation, long service life, and reliable performance in demanding industrial environments.
Dufew supports international distributors, OEM customers, system integrators, and industrial users with technical support, customized production, and efficient supply services.
The internal resistor elements use aluminum housing structures that provide efficient heat transfer, mechanical protection, and stable performance during continuous industrial operation.
The external enclosure is manufactured with aluminum-zinc coated steel sheet, offering corrosion resistance, structural strength, and improved environmental adaptability for industrial applications.
The resistor box integrates high-current terminal blocks, temperature protection switches, optional cooling fans, and resistor group control functions to improve operational safety, maintenance efficiency, and system reliability.
Dufew Electric maintains strict quality control throughout product design, material selection, manufacturing, testing, and delivery. By combining professional engineering experience, precise production processes, and comprehensive inspection procedures, Dufew ensures reliable electrical performance for long-term industrial applications.
Compared with individually installed aluminum housed resistors or independent corrugated resistor designs, DUFEW's integrated solution provides improved protection, optimized thermal management, higher installation efficiency, and easier maintenance for industrial braking and load applications.
| Comparison Dimension | Aluminum Clad Resistor Box | Traditional Single Aluminum Housed / Independent Corrugated Resistor |
|---|---|---|
| Integration and Power Capacity | Multiple aluminum housed resistor units are integrated through series and parallel connections inside one enclosure. The compact structure supports power requirements up to 30KW while simplifying installation and wiring. | Individual resistor units usually require separate installation and additional protection structures, resulting in more complicated wiring and limited system integration. |
| Environmental Protection | Each resistor unit provides independent encapsulated protection, while the external enclosure improves resistance against dust, moisture, oil contamination, and industrial operating conditions. | Heating elements are more exposed to environmental factors and may require additional protective measures for harsh industrial applications. |
| Thermal Management | The aluminum housing of each resistor improves heat transfer, while the internal layout and airflow design help distribute heat more evenly during continuous operation. | Multiple separate resistors may lack optimized airflow paths, increasing the risk of heat accumulation and performance degradation over long-term operation. |
| Application Flexibility | The modular structure supports different resistor configurations, allowing adaptation to various braking, load, and industrial control applications. | Fixed resistor structures generally provide less flexibility for changing application requirements. |
| Safety Configuration | Integrated terminal connections and temperature protection improve operational safety. Cooling fans, filters, and other options can be added according to project requirements. | Protection components and accessories often require separate selection and installation, increasing system integration work. |
A: The selection depends on the working environment and application requirements. For applications involving dust, oil contamination, moisture, or higher protection requirements, an aluminum housed resistor configuration provides better environmental adaptability. For systems requiring extremely low inductance performance and high-frequency pulse braking, corrugated resistor designs may be more suitable.
A: Yes. The internal resistor units are designed as independent modules, allowing individual replacement during maintenance without replacing the complete assembly. This modular structure helps reduce downtime and maintenance costs.
A: When expanding capacity through parallel connection, users should ensure consistent resistance values, matched power ratings, sufficient ventilation space, and proper heat dissipation conditions. Correct configuration helps maintain balanced current distribution and reliable operation.
A: Yes. The resistor elements convert electrical energy into heat during operation, so the enclosure temperature will naturally rise. The built-in temperature protection system provides additional safety by disconnecting the circuit when abnormal conditions occur.
A: The standard configuration supports power ratings from 1KW to 30KW. DUFEW also provides customized designs according to required power levels, resistance values, enclosure structures, and application conditions.
A: Yes. DUFEW develops customized configurations based on application requirements, including resistance value, rated power, enclosure design, protection level, cooling method, internal resistor arrangement, and terminal configuration.
Customers can provide technical specifications, drawings, or project requirements, and DUFEW engineers will recommend a suitable configuration.
Address
No. 364, Kangyang Road, Huangdai Town, Xiangcheng District, Suzhou City, Jiangsu Province, China
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