RWR78S18R2FSS73

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Through-hole resistors (THRs) are a type of resistor component widely used in electronics and electrical systems. These resistors are typically connected by soldering the two pins into a device’s circuit board. The most commonly used resistor today is the carbon film-based THR, which is made up of a tiny cylindrical tube filled with a conductive carbon film, either black or colored.The RWR78S18R2FSS73, a variant of THR, offers improved properties like higher power rating, a more compact package size, and greater accuracy than other THR components. This THR stands out for its excellent temperature stability, exhibiting the lowest temperature drift among THR types. As such, it is commonly used in power supplies, signal amplifiers, and motor drivers, as well as in other applications requiring power ratings of up to 80 W and tolerances better than 0.25%.The working principle of THR is based on a property of solid metal conductors known as resistance. Resistance is a property of any material that resists the flow of electric current, manifesting as heat when the material is energized. The resistance of a THR is determined by its ohmic value — the resistance of its metallic film — as well as by its thermal coefficient of resistance, which is a measure of its ability to retain a consistent resistance even in varying temperatures. When current flows through a THR, the energy created by the electrical resistance produces heat, which is dissipated into the surrounding air. This helps to prevent damage to the device as, without a THR, large amounts of current can overheat and eventually destroy various parts in the circuit. TWR components are rated for specific power handling range by the manufacturer, which is based on the maximum amount of power the THR can safely dissipate at a given ambient temperature. Depending on the thermal response of the THR, different levels of wattage can be handled safely. For example, a THR rated for 0.25 W can handle much lower wattage levels than one rated for 3-5 W.When choosing a THR for a given application, purchasers are encouraged to consult with THR suppliers and consider whether a low, medium, or high power rating THR is needed. Above all, however, the THR must exhibit a stable electrical resistance, with high linearity, for consistent long-term performance and durability. In order to maintain a consistent output and avoid damage to the device, it is important that the THR used in a given application is rated for the type of environment in which it will operate. THR resistance is highly temperature-dependent, so in applications where heat is generated, or in environments with wide temperature swings, a low-temperature drift THR such as the RWR78S18R2FSS73 is recommended for the most consistent performance.The RWR78S18R2FSS73 is an excellent THR for application in high-voltage equipment and power supplies, as it offers extremely stable electrical resistance, high linearity, and superior temperature performance. With a through-hole configuration, this THR delivers maximum capacity for applications requiring up to 80 W of power, while providing 0.25% tolerance and excellent temperature stability. As such, it is an ideal THR for a variety of applications requiring reliable and consistent heat dissipation.When correctly installed and used within its recommended specifications, the RWR78S18R2FSS73 can function efficiently and reliably for years. Proper soldering and good layout are critical to the component’s reliable performance, as the data sheet and the manufacturer’s recommendations must be followed to ensure safe and effective operation of the device. To summarize, the RWR78S18R2FSS73 THR is a highly temperature-stable component with excellent electrical resistance and linearity characteristics, and is suitable for power supplies, signal amplifiers, and motor drivers that require up to 80 W of power. It is recommended for applications that need good temperature stability, and should be installed with proper care and according to the manufacturer’s instructions for reliable and consistent operation.

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