PWR6927 PWR6927 Wirewound Resistors

PWR6927 is a series of high-quality wirewound resistors manufactured by Bourns, a global leader in electronic components. These passive components are specifically designed to provide precise and stable resistance in a wide array of electronic circuits. Wirewound resistors, like the PWR6927, are known for their excellent power handling capabilities, high accuracy, and stability, making them suitable for applications where reliability and performance are paramount. The PWR6927 series stands out due to its surface mount profile, offering space-saving advantages and compatibility with modern automated assembly processes.

Key Specifications

The PWR6927 series offers several critical attributes that define its performance and suitability for various applications:

• Tolerances: 0.5 %, 1 %, 5 %
  Tolerance indicates the permissible deviation from the nominal resistance value. A 0.5% tolerance signifies a very high precision component, crucial for sensitive circuits where exact resistance is required to maintain circuit integrity and performance. 1% is also a common precision level, while 5% is a standard tolerance for general-purpose applications where cost-effectiveness and moderate accuracy are sufficient. The availability of multiple tolerances allows designers to select the optimal balance between precision and cost for their specific needs.
• Power (Watts): 3 W
  The power rating specifies the maximum amount of power (in watts) the resistor can dissipate continuously without damage. A 3W power rating for the PWR6927 indicates its capability to handle significant power loads, making it suitable for power supply circuits, motor control, and other applications where current flow can generate considerable heat. This high power handling capacity contributes to the component’s robustness and longevity.
• Component Type: Wirewound Resistors
  Wirewound resistors are constructed by winding a resistive wire around a non-conductive core. This construction method provides superior accuracy, stability, and power handling compared to other resistor types, such as carbon film or metal film. They are particularly favored in applications requiring high precision and the ability to withstand high temperatures and power surges.
• Resistance Range: 0.05 to 16K Ω
  This broad resistance range, from very low (0.05 Ohms) to moderately high (16 Kilo-Ohms), offers significant flexibility for circuit designers. Low resistance values are often used for current sensing or in power circuits where minimal voltage drop is desired, while higher values are essential for voltage division, biasing, and signal conditioning.
• Profile/Package Style: Surface Mount Wirewound
  The surface mount (SMD) package style is a modern form factor that allows components to be mounted directly onto the surface of printed circuit boards (PCBs). This contrasts with through-hole components, which require leads to be inserted through holes. Surface mount wirewound resistors offer advantages such as reduced board space, improved thermal management, and compatibility with automated pick-and-place assembly, leading to more compact and cost-effective designs.
• Temperature Coefficient: ±20 PPM/°C ~ ±300 PPM/°C
  The temperature coefficient of resistance (TCR) measures how much the resistance value changes per degree Celsius change in temperature. A low TCR, such as ±20 PPM/°C, indicates excellent stability over varying temperatures, which is critical for precision applications where environmental temperature fluctuations could otherwise degrade circuit performance. A range up to ±300 PPM/°C covers applications where moderate temperature stability is acceptable.

Features and Benefits

• High Power Dissipation in a Compact Form Factor: The 3W power rating combined with a surface mount package allows for significant power handling in space-constrained designs, reducing the overall footprint of the electronic assembly.
• Exceptional Precision and Stability: With tolerances as low as 0.5% and a low temperature coefficient, the PWR6927 series ensures highly accurate and stable resistance values, critical for sensitive measurement and control systems.
• Robust Wirewound Construction: The inherent design of wirewound resistors provides superior reliability and durability, making them resistant to electrical overloads and environmental stresses, thereby extending the lifespan of the end product.
• Wide Resistance Range for Versatile Applications: The extensive resistance range from 0.05 Ω to 16 KΩ offers designers immense flexibility, enabling the use of a single component series across diverse circuit requirements.
• Optimized for Automated Assembly: The surface mount profile is fully compatible with modern automated manufacturing processes, leading to faster assembly times, reduced production costs, and improved manufacturing consistency.

Typical Applications

• Power Supplies and Voltage Regulators: The high power rating and stable resistance make the PWR6927 ideal for current limiting, voltage division, and load applications within power supply units, ensuring stable and reliable power delivery.
• Motor Control Circuits: In industrial and automotive motor control systems, these resistors can be used for current sensing, braking, and snubber circuits, leveraging their ability to handle high currents and dissipate heat effectively.
• Test and Measurement Equipment: Due to their high precision and stability, PWR6927 resistors are well-suited for calibration circuits, precision voltage dividers, and current shunts in oscilloscopes, multimeters, and other analytical instruments where accuracy is paramount.
• Audio Amplifiers and Professional Audio Equipment: The low noise characteristics and high power handling of wirewound resistors are beneficial in audio applications for biasing, gain control, and output stages, contributing to clear and undistorted sound reproduction.
• Industrial Automation and Control Systems: In PLCs, sensor interfaces, and process control systems, these resistors provide reliable performance for signal conditioning, feedback loops, and protection circuits in demanding industrial environments.

The Bourns PWR6927 series of wirewound resistors offers a compelling combination of precision, power handling, and reliability in a surface mount package. These components are expertly engineered to meet the rigorous demands of modern electronic designs. Cirkit Electro Components, Mumbai, proudly stocks and ships the PWR6927 across India, ensuring timely delivery for your project needs.

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