Littelfuse Inc. USP3121

The "Mounting Type" in electronic components refers to the method used to attach or connect a component to a circuit board or other substrate, such as through-hole, surface-mount, or panel mount.

refers to the protective housing that encases an electronic component, providing mechanical support, electrical connections, and thermal management.

Semiconductor package is a carrier / shell used to contain and cover one or more semiconductor components or integrated circuits. The material of the shell can be metal, plastic, glass or ceramic.

In electronic components, the "Series" refers to a group of products that share similar characteristics, designs, or functionalities, often produced by the same manufacturer. These components within a series typically have common specifications but may vary in terms of voltage, power, or packaging to meet different application needs. The series name helps identify and differentiate between various product lines within a manufacturer's catalog.

Parts can have many statuses as they progress through the configuration, analysis, review, and approval stages.

Moisture Sensitivity Level (MSL) is a standardized rating that indicates the susceptibility of electronic components, particularly semiconductors, to moisture-induced damage during storage and the soldering process, defining the allowable exposure time to ambient conditions before they require special handling or baking to prevent failures

Tolerance is the percentage of error in the resistor's resistance, or how much more or less you can expect a resistor's actual measured resistance to be from its stated resistance. A gold tolerance band is 5% tolerance, silver is 10%, and no band at all would mean a 20% tolerance.

The parameter "Resistance in Ω @ 25°C" in electronic components refers to the resistance value of the component measured in ohms at a temperature of 25 degrees Celsius. Resistance is a fundamental property of electronic components that determines how much they impede the flow of electric current. The resistance value at 25°C is often provided as a reference point because it is a standard temperature for many electronic applications. This parameter helps engineers and designers understand how the component will behave in a circuit and allows for accurate calculations of current flow and voltage drop.

The parameter "B0/50" in electronic components typically refers to the temperature coefficient of the component's resistance. It indicates how much the resistance of the component changes with temperature. The "B0" part of the parameter represents the resistance value at a reference temperature, often 25 degrees Celsius, while the "50" part represents the temperature coefficient value. A higher B0/50 value indicates a larger change in resistance with temperature, while a lower value indicates a more stable resistance over temperature variations. It is an important parameter to consider when designing circuits that are sensitive to temperature changes.

RoHS means “Restriction of Certain Hazardous Substances” in the “Hazardous Substances Directive” in electrical and electronic equipment.