PTKM250-121

DC Resistance (DCR):	160 mOhm Max
Height - Seated (Max):	--
Size / Dimension:	0.850" Dia x 0.400" W (21.59mm x 10.16mm)
Supplier Device Package:	--
Package / Case:	Radial
Mounting Type:	Through Hole
Inductance Frequency - Test:	1kHz
Operating Temperature:	--
Ratings:	--
Frequency - Self Resonant:	1MHz
Q @ Freq:	--
Series:	PTKM
Shielding:	Shielded
Current - Saturation:	900mA
Current Rating:	2.07A
Tolerance:	±10%
Inductance:	250µH
Material - Core:	Ferrite
Type:	Toroidal
Part Status:	Active
Packaging:	Bulk

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PTKM250-121 fixed inductors, also known as electrical filters, are among the most commonly used passive components in electronic and industrial applications. They are used to filter electrical noise and to manage interference, and are essential components in many circuits.The PTKM250-121 is a type of fixed inductor designed specifically for high-density circuits. It is designed to fit within the limited space and form factor of the PCB. It is constructed from high-temperature ferrite core and copper wire, meaning it can handle temperatures of up to 125°C without failure. It also features high-frequency, over-pressure, and short-circuit protection.The primary application of the PTKM250-121 is to block high-frequency interference and other unwanted signals. It does so by acting as an inductor, which opposes changes in current, and by creating a different shaped field of electromagnetic interference (EMI) shield around the circuit board. This helps protect sensitive components from interference, and enables high-speed data transmission with minimal interference or signal degradation.The working principle of the PTKM250-121 is that the inductor\'s iron core generates an electromagnetic field when a current is applied. This field causes the electrons in the current to take on a counter-clockwise, or left-handed, rotation. The inductor\'s copper coils then serve to direct and focus the current, allowing it to pass through the core without degrading the signal.In addition to providing a protective EMI shield, the PTKM250-121 also works to reduce the amount of electrical noise in a circuit. This is done by smoothing the current flow so that it is more consistent. The inductor also helps to reduce power supply ripple, which can cause electrical noise and disrupt signal integrity.The PTKM250-121 also helps increase the efficiency of power supplies by preventing the current from being over-loaded. This is because as the current passes through the inductor, it produces a low impedance limited by the inductance of the core. This helps to stabilize the flow of current and ensure that power is properly utilized.In summary, the PTKM250-121 is an essential component in many circuits, and can be useful for filtering electrical noise, managing interference, and providing an EMI shield for sensitive components. It is also designed to be able to handle high temperatures and features high-frequency protection. By helping to reduce power supply ripple and ensuring that current is used efficiently, the PTKM250-121 proves to be an invaluable component in many applications.

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