SCB75F-680

DC Resistance (DCR):	340 mOhm Max
Height - Seated (Max):	0.217" (5.50mm)
Size / Dimension:	0.291" L x 0.291" W (7.40mm x 7.40mm)
Supplier Device Package:	--
Package / Case:	Nonstandard
Mounting Type:	Surface Mount
Inductance Frequency - Test:	1kHz
Operating Temperature:	-40°C ~ 125°C
Ratings:	--
Frequency - Self Resonant:	--
Q @ Freq:	--
Series:	SCB75F
Shielding:	Unshielded
Current - Saturation:	660mA
Current Rating:	1.14A
Tolerance:	±20%
Inductance:	68µH
Material - Core:	--
Type:	Wirewound
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

Fixed inductors, which are also known as chokes, coils, or simply inductors, are electrical components with two terminals that store energy in a magnetic field. They are critical components in a variety of electronics applications and are used to introduce inductance into a circuit for providing reactive current, blocking direct current, and regulating the voltage level in digital circuits. The SCB75F-680 is an example of a fixed inductor that is regularly employed in fixed-frequency and radio-frequency circuits.

Application Field

The SCB75F-680 is a fixed inductor developed for applications in high-frequency circuits, especially regulated power supplies that require decoupling and AC line bypass. It provides excellent stability and performance under high temperatures and frequencies, and is able to produce a temperature coefficient of change of 0.4%. As such, this inductor is especially well-suited for switching power supplies, telecommunications circuit applications, and EMI/RFI noise suppression systems.The SCB75F-680 provides a voltage rating of 6.8 Vdc, an inductance of 1.2mH +/- 10%, and a Q-value of 14. Additionally, this inductor features an operating frequency of 200µH at 250KHz, has a maximum DC resistance of 0.41 Ohms, and is able to handle peak currents up to a maximum of 3400mA.

Working Principle

An understanding of the working principles of fixed inductors is important to comprehend the operation of the SCB75F-680. Put simply, when an alternating current is applied, the inductor builds up a magnetic field around its coil. This magnetic field is opposing the applied current change, and this opposes the current flow, resulting in an induced voltage at the inductor\'s terminals. This voltage puts the current in opposition to the magnetic field, causing the field to collapse. As a result, the same voltage at the inductor\'s terminals is produced, but in the opposing polarity. This process is known as an inductor\'s self-inductance.The SCB75F-680, as a golden-edge inductor, features a non-linear temperature dependency because of the composition of its coil material. It relies on the magnetostrictive effect to produce a linear output per temperature range. This effect causes the molten steel inside the SCB75F-680\'s coil to expand and contract, which produces a linear change in inductance.

Conclusion

The SCB75F-680 is a reliable and robust fixed inductor developed for applications in high-frequency circuits, especially regulated power supplies that require decoupling and AC line bypass. It provides excellent stability and performance under high temperatures and frequencies while its magnetostrictive effect allows it to offer a linear temperature change in inductance. This inductor is able to handle peak currents up to a maximum of 3400mA, making it highly suitable for switching power supplies, telecommunications circuit applications, and EMI/RFI noise suppression systems.

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