PWR220T-20 PWR220T-20 High Power Resistors

PWR220T-20 is a high-performance power resistor from Bourns, a leading manufacturer renowned for its extensive range of passive components. This specific model falls under the category of High Power Resistors and is designed to dissipate significant amounts of power, making it crucial for applications where heat generation is a concern. Its robust construction and precise electrical characteristics ensure reliable operation in demanding environments. As a passive component, resistors are fundamental in almost all electronic circuits, controlling current flow and voltage levels. The PWR220T-20, with its high power rating, is particularly suited for power management, motor control, and industrial applications where standard resistors would fail due to excessive heat.

Key Specifications

The Package of the PWR220T-20 is TO-220, a widely recognized industry standard for power semiconductors and resistors. This package type is known for its excellent thermal performance, allowing for efficient heat transfer to a heatsink, which is critical for high-power applications. The Material used is Thick Film, a technology known for its cost-effectiveness, reliability, and ability to handle high power densities. Thick film resistors offer a good balance of performance and economic viability for a broad range of applications. The Tolerances available are 1 % and 5 %, indicating the permissible deviation from the nominal resistance value. A 1% tolerance signifies higher precision, crucial for sensitive circuits, while 5% is acceptable for less critical applications where cost might be a primary factor. The Component Type is explicitly High Power Resistors, underscoring its primary function and design intent. This classification highlights its capability to manage substantial power dissipation without compromising performance or longevity. The Power per Resistor is 20 W, a significant rating that allows this component to be used in circuits requiring substantial power handling, such as power supplies, motor drives, and audio amplifiers. This high power rating is a key differentiator. The Physical Configuration is Radial Through-hole, meaning the leads extend radially from the body and are designed for insertion into holes on a printed circuit board (PCB). This configuration provides mechanical robustness and good thermal contact with the PCB or a heatsink. The Resistance Range (Ohms) spans from 0.5 to 130K, offering a wide selection of resistance values to meet diverse circuit requirements, from current sensing in low-resistance applications to voltage division in higher-resistance scenarios. Finally, the Temperature Coefficient is ±100 ppm, which indicates how much the resistance value changes with temperature variations. A lower ppm value signifies greater stability across different operating temperatures, which is vital for precision applications.

Features and Benefits

• High Power Dissipation: With a 20W power rating, the PWR220T-20 can effectively manage significant power loads, preventing overheating and ensuring circuit stability in demanding applications.
• TO-220 Package for Thermal Efficiency: The industry-standard TO-220 package facilitates easy mounting to heatsinks, optimizing thermal management and extending the component’s lifespan.
• Wide Resistance Range: Offering values from 0.5 to 130K Ohms, this resistor provides exceptional flexibility for designers to implement various circuit functions, from current limiting to voltage division.
• Precision Tolerance Options: Available in 1% and 5% tolerances, it caters to both high-precision applications requiring tight control over resistance values and general-purpose circuits where cost-effectiveness is key.
• Robust Thick Film Technology: Utilizes reliable thick film material, ensuring consistent performance, long-term stability, and durability in harsh operating conditions.

Typical Applications

The PWR220T-20 high power resistor finds extensive use across various industrial and commercial sectors due to its robust design and high power handling capabilities. One primary application is in Power Supplies and Converters, where it is used for current limiting, voltage regulation, and discharge circuits. Its ability to dissipate significant power makes it ideal for managing inrush currents or bleeding off stored energy in capacitors, ensuring safe and reliable operation. Another critical area is Motor Control Systems, particularly in industrial automation and robotics. Here, these resistors are employed in braking circuits to dissipate regenerative energy from motors, preventing overvoltage conditions and protecting sensitive electronics. They are also used in current sensing applications within motor drives to monitor and control motor current precisely. Furthermore, in Audio Amplifiers and Sound Systems, the PWR220T-20 can be utilized in output stages for speaker protection, load balancing, or as part of filter networks where high power handling is essential to maintain audio fidelity and prevent component failure. In Industrial Heating and Temperature Control, these resistors can serve as heating elements themselves or as part of control circuits for ovens, furnaces, and other thermal systems, where their stable resistance over temperature is an advantage. Lastly, they are frequently found in Test and Measurement Equipment as dummy loads or in precision calibration circuits, providing a stable and known resistance for accurate measurements and equipment testing.

The PWR220T-20 from Bourns is a versatile and reliable high power resistor, engineered to meet the stringent demands of modern electronic designs. Its combination of high power rating, thermal efficiency, and broad resistance range makes it an indispensable component for a multitude of applications. This component is readily stocked and shipped across India by Cirkit Electro Components, Mumbai, ensuring prompt availability for your projects.

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