Series:	WW
Packaging:	Tape & Reel (TR)
Part Status:	Active
Resistance:	40.2 Ohms
Tolerance:	±1%
Power (Watts):	0.4W
Composition:	Wirewound
Features:	Moisture Resistant
Temperature Coefficient:	±20ppm/°C
Operating Temperature:	-55°C ~ 350°C
Package / Case:	Axial
Supplier Device Package:	Axial
Size / Dimension:	0.110" Dia x 0.312" L (2.79mm x 7.92mm)
Height - Seated (Max):	--
Number of Terminations:	2
Failure Rate:	--

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Introduction of Through Hole Resistors

Through hole resistors are the most common resistors used in electronic and electrical circuits. They are used to limit the current flowing through a circuit and to provide impedance matching. Through hole resistors can be found in many types of electronic and electrical circuits, including amplifiers, power supplies, switching circuits, logic circuits, and signal processing.

Types of Through Hole Resistors

Through hole resistors come in a variety of different types and sizes. The most common types of through hole resistors are carbon composition, thin film, and metal film resistors. All through hole resistors consist of a resistive element surrounded by insulation material, and all have the same basic structure.Carbon composition resistors are the oldest and most reliable type of through hole resistors. They are made from a mixture of carbon, graphite, and filler material. Carbon composition resistors use a ceramic or metal housing to hold the resistive material in place.Thin film resistors are made from a thin layer of metal oxide or an alloy placed on an insulating substrate. They are more accurate than carbon composition resistors, with excellent temperature stability and moisture resistance.Metal film resistors are made from a thin film of metal deposited on an insulating substrate. They are the most accurate type of through hole resistors, with excellent temperature stability and very low noise levels.

WW12FT40R2 application field and working principle

The WW12FT40R2 is a type of through hole resistor. It is a 12-watt through hole resistor with a 0.25-ohm resistance value. It is made from metal oxide technology, which provides excellent temperature stability and noise reduction.The WW12FT40R2 is typically used in power supply and switching circuits. It can also be used in high-precision voltage measurement circuits. It is designed to dissipate heat quickly, and can handle a maximum operating temperature of up to 175°C.The WW12FT40R2 works by providing resistance to the flow of current through the circuit. It limits the amount of current that can flow through the circuit, and helps to ensure that other components in the circuit are not damaged. It also helps to provide noise reduction, by reducing the amount of electrical noise generated by the circuit.

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Part Number	Manufacturer	Price	Quantity	Description