L25J4R0

Series:	270
Packaging:	Bulk
Part Status:	Active
Resistance:	4 Ohms
Tolerance:	±5%
Power (Watts):	25W
Composition:	Wirewound
Temperature Coefficient:	±400ppm/°C
Operating Temperature:	-55°C ~ 350°C
Features:	Flame Retardant Coating, Safety
Coating, Housing Type:	Vitreous Enamel Coated
Mounting Feature:	Brackets (not included)
Size / Dimension:	0.563" Dia x 2.000" L (14.30mm x 50.80mm)
Height - Seated (Max):	--
Lead Style:	Solder Lugs
Package / Case:	Radial, Tubular
Failure Rate:	--

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Chassis Mount Resistors: L25J4R0 Application Field and Working Principle

Chassis mount resistors are common components used in a wide variety of electronic applications, from consumer electronics and industrial automation to military and aerospace systems. These resistors are usually threaded into the chassis of a device and are used to control the current and voltage that is applied to the circuit. Chassis mount resistors are generally connected in series, and act as a kind of safety valve to dissipate any excessive current.One of the more popular types of chassis mount resistors is the L25J4R0. It is a non-inductive, axial leaded resistor rated for 75 Watts of power dissipation at 150 degrees Celsius. The resistor has a wide resistance range of 25 Ohms to 4K Ohms and its body is made of a ceramic-epoxy composite, and its leads are insulated with Silicone rubber. It is designed for single-sided cooling, and has a thermal resistance of 0.75 degrees Celsius/Watt.The L25J4R0\'s main application is in power supplies, motor controls and transformers. In these applications, it is used to absorb high voltage spikes that can damage other components within the power systems. It also has an important role in protecting the user of the device from electrical shocks.The working principle of the L25J4R0 is relatively simple. When a voltage spike is applied to the resistor, it will dissipate this spike in the form of heat. This heat is then absorbed by the surrounding air or by cooling fans or radiators. The resistor will then cool down as the voltage spike dissipates, and return to its normal working temperature.The L25J4R0 is a highly reliable resistor that can handle repeat voltage spikes without any permanent damage. Its long-term reliability is also ensured by its design, which reduces the occurrence of excessive stress fracturing and improves its low-temperature performance. It\'s also relatively low cost and easy to mount and replace, making it an ideal choice for energy-saving and reliable electronic applications.

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Part Number	Manufacturer	Price	Quantity	Description