DRA74-221-R Inductors, Coils, Chokes

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Recently, the development of modern technology has led to the production of various types of electronic components. Fixed inductors stand out among them, and DRA74-221-R is a representative. To meet the needs of different customers, it is designed to meet particular applications in different disciplines. In this article, we will discuss the application field and working principle of DRA74-221-R.

1. Overview of Device

DRA74-221-R is a cylindrical, 5-lead, fixed inductor manufactured by the experienced provider MIL. The inductor is coated with an epoxy resin (UL 94V-0 rated). It is designed primarily for surface-mount applications, and its ease of mounting and good shielding make it popular for a variety of high-frequency applications. Technical specifications of the device are as follows:

• Rated current: 2.2 A
• Package size: 9 × 4.7 × 1.6 mm (L × W × H)
• Inductance: 220 μH
• MIL-STD-202Q standard, RoHS compliant
• Tolerance: ±20 %

2. Application Field

Due to its characteristics, DRA74-221-R is suitable for numerous applications, such as high-frequency power electronics, audio-frequency power output, audio filters, EMI/RFI filters, and low-pass, high-pass, band-pass, and band-stop filters. Furthermore, its wide range of inductance values (from 0.1 μH to 220 μH) make it suitable for applications in motor control, switching power supply, audio amplifier, air conditioner, portable computing devices, and many more.

3. Working Principle

DRA74-221-R is a fixed inductor, which means that it will always maintain its inductance. This makes it especially suitable for use in applications in which maintaining a steady inductance is important, such as audio-frequency power output and audio filters. As a fixed inductor, it operates in the same way as an ideal inductor. Specifically, when a current flows through it, an electromagnetic field and a resulting voltage are generated in proportion to the rate of change of the current. This property is known as inductance, and it is what makes the fixed inductor such a useful device.

4. Characteristics and Advantages

Compared with traditional wire coils or other inductors, DRA74-221-R is much smaller and lighter, providing customers with greater convenience. Additionally, its 5-lead package allows for easier and more reliable mounting, enabling the user to place it in otherwise inaccessible areas. Its high insulation rating and MIL-STD-202Q compliant / RoHS compliant properties further showcase its durability and quality. The device is also extremely stable and its rated current of 2.2 A makes it well-suited for applications requiring higher current.

5. Conclusion

DRA74-221-R is a cost-effective, reliable, and durable fixed inductor. Its wide range of inductance values, high insulation rating, and robust 5-lead construction make it an ideal choice for applications such as audio-frequency power output, motor control, switching power supply, and portable computing devices. Furthermore, its compact package makes it highly versatile and its ease of mounting makes it very convenient for users.

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