The KP290~298 series Power Wire Wound Resistors are precision electronic components specifically designed for high-power applications, widely used in industrial control, power equipment, and communication devices. This product series adopts radial glass fiber core and coated structure, featuring excellent high-temperature resistance, high power handling capability, and stable electrical performance.
II. Product Features
- Radial Glass Fiber Core: Utilizes high-strength glass fiber as the supporting material for the resistor body, ensuring stability and reliability of the resistor under high power and harsh environmental conditions.
- Coated Design: Surface protective coating effectively prevents external environmental impact on the resistor, extending service life.
- Green or Gray Markings: Clear identification facilitates product recognition and differentiation of different specifications, improving usability.
- High Power Handling Capability: Suitable for various high-power application scenarios, providing reliable electrical performance assurance.
- Precise Resistance Range: Offers multiple resistance value options to meet different circuit design requirements.
III. Physical Dimensions
The physical dimensions of the KP290~298 series resistors are shown in the figure below:
- Length (L): Varies by model, ranging from 18.2mm to 53.7mm
- Diameter (RM): Ranges from 10.2mm to 45.7mm
- Lead Spacing: Standard design for easy soldering and installation
IV. Technical Specifications
The following is the technical specification table for KP290~298 series resistors:
| Minimum Min | Maximum Max | ||
| 290-0/1 | 2.0 | R1 | 2K2 |
| 292-0/1 | 4.0 | R18 | 3K3 |
| 294-0/1 | 5.0 | R18 | 5K1 |
| 296-0/1 | 6.5 | R22 | 7K5 |
| 298-0/1 | 8.0 | R51 | 9K1 |
V. Performance Specifications
The performance specifications of KP290~298 series resistors are as follows:
| Tolerance | ±5% / (J) ±10% / (K) |
| Temperature Coefficient | ±250 × 10⁻⁶ / °C |
| Climatic Category | 55/155/21 |
| Temperature Range | -55 ~ +275°C |
| Power Derating | When ambient temperature rises from 70°C to 275°C, the resistor load capacity decreases from 100% of rated power to 0% |
| Load Life P70, 70°C, 1000hrs | ΔR ≤ ± (5% / R + 0.1Ω) |
| Damp Heat, Steady State 40°C, 93%, r.h., 21d | ΔR ≤ ± (5% / R + 0.1Ω) |
| Terminal Tensile Strength | ΔR ≤ ± (1% / R + 0.05Ω) |
| Solder Heat Resistance, 350°C, 3.5s | ΔR ≤ ± (1% / R + 0.05Ω) |
| Solderability | IEC68-2-20(1968) Bridge Soldering Method, 235°C ± 0.5°C, 2 ± 0.5s (solder bath method) |
VI. Application Fields
KP290~298 series Power Wire Wound Resistors are widely applied in the following areas:
- Industrial automation equipment
- Power modules and switching power supplies
- Communication equipment and network devices
- Motor drives and control systems
- High-frequency circuits and filter design
VII. Advantages and Features
- High Reliability: Utilizes quality materials and advanced processes to ensure long-term stable operation
- Wide Temperature Range: Suitable for extreme temperature environments, guaranteed to operate normally within -55°C to +275°C range
- Low Temperature Coefficient: Ensures minimal resistance value variation with temperature changes, improving circuit stability
- Easy Installation: Standard lead design supports both manual soldering and automatic surface mount processes