SRP1238A-R82M Inductors, Coils, Chokes

DC Resistance (DCR):	3 mOhm Max
Height - Seated (Max):	0.138" (3.50mm)
Size / Dimension:	0.531" L x 0.492" W (13.50mm x 12.50mm)
Supplier Device Package:	--
Package / Case:	Nonstandard
Mounting Type:	Surface Mount
Inductance Frequency - Test:	100kHz
Operating Temperature:	-40°C ~ 150°C
Ratings:	AEC-Q200
Frequency - Self Resonant:	45MHz
Q @ Freq:	15 @ 100kHz
Series:	SRP1238A
Shielding:	Shielded
Current - Saturation:	44A
Current Rating:	25A
Tolerance:	±20%
Inductance:	820nH
Material - Core:	Carbonyl Powder
Type:	Wirewound
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to Fixed Inductors

A fixed inductor is an electrical component that stores energy in the form of a magnetic field. It is typically composed of a coil of wire, either wound or etched on an electromagnetic core, and forms part of an electrical circuit. Fixed inductors can be used in a variety of applications, and can also be classified based on their materials, such as ferrite, laminated steel, air core, etc. Additionally, fixed inductors can be used for filtering, energy storage, and damping purposes.

SRP1238A-R82M Fixed Inductor

The SRP1238A-R82M is a compact, low-profile, high-current, and low-inductance fixed inductor that offers excellent performance in wide range of applications. It is constructed with a soft ferrite core, which is encapsulated with thermally conductive epoxy resin in a rectangular shape. The SRP1238A-R82M has a flat bottom surface that allows for easy mounting on circuit boards or chassis. It is also RoHS compliant and UL94V-0 approved. Furthermore, this inductor has a rated DC current of 12A and inductance of 1.8uH.

Application Field and Working Principle

The SRP1238A-R82M is most commonly used in various power electronic circuits, such as power converters, motor control circuits, DC-DC converters, and battery charging systems. It is a high current inductor, which means it is able to handle large current levels without saturating and delivering high power conversion efficiency. Its low profile and easy-mount design make it suitable for use in limited space or slender chassis. The SRP1238A-R82M utilizes a soft ferrite core that acts as an effective magnetic permeable material. The coil is wound around the core, creating a magnetic field when current flows through it. This magnetic field creates a self-inductance produced by the coil itself, which in turn creates a back EMF or "Lenz\'s Law". The voltage induced across the inductor is proportional to the rate of change of the current. The SRP1238A-R82M is also used in radio frequency circuits as a tuning element due to its high Q-factor, which increases the selectivity of the circuit by reducing unwanted frequencies.

Conclusion

The SRP1238A-R82M is an ideal choice for a variety of applications due to its low profile, high current carrying capacity, and low inductance. Its low profile is perfect for use in limited space or slender chassis, while its high current carrying capacity makes it suitable for power electronics circuits and radio frequency circuits. The soft ferrite core and robust design ensure high reliability and long life time. Its low inductance makes it suitable for use in power converters, motor control circuits, DC-DC converters, and battery charging systems.

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