Littelfuse Inc. RUSBF135-2

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.

having leads that are designed to be soldered on the side of a circuit board that the body of the component is mounted on.

Terminal Shape in electronic components refers to the physical design of the connection points on the component that allow for electrical connections to be made. These terminals can come in various shapes such as pins, leads, pads, or terminals with specific configurations like surface mount or through-hole. The terminal shape is important as it determines how the component can be mounted on a circuit board or connected to other components. Different terminal shapes are used based on the specific requirements of the electronic circuit design and manufacturing process.

The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.

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.

In electronic components, the parameter "Size / Dimension" refers to the physical dimensions of the component, such as its length, width, and height. These dimensions are crucial for determining how the component will fit into a circuit or system, as well as for ensuring compatibility with other components and the overall design requirements. The size of a component can also impact its performance characteristics, thermal properties, and overall functionality within a given application. Engineers and designers must carefully consider the size and dimensions of electronic components to ensure proper integration and functionality within their designs.

The "Pbfree Code" parameter in electronic components refers to the code or marking used to indicate that the component is lead-free. Lead (Pb) is a toxic substance that has been widely used in electronic components for many years, but due to environmental concerns, there has been a shift towards lead-free alternatives. The Pbfree Code helps manufacturers and users easily identify components that do not contain lead, ensuring compliance with regulations and promoting environmentally friendly practices. It is important to pay attention to the Pbfree Code when selecting electronic components to ensure they meet the necessary requirements for lead-free applications.

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

Any Feature, including a modified Existing Feature, that is not an Existing Feature.

The packing method in electronic components refers to the technique used to package and protect the component during shipping and handling. It encompasses various forms including tape and reel, tray, tube, or bulk packaging, each suited for different types of components and manufacturing processes. The choice of packing method can affect the ease of handling, storage, and the efficiency of assembly in automated processes. Additionally, it plays a crucial role in ensuring the reliability and integrity of the components until they are used in electronic devices.

Reach Compliance Code refers to a designation indicating that electronic components meet the requirements set by the Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) regulation in the European Union. It signifies that the manufacturer has assessed and managed the chemical substances within the components to ensure safety and environmental protection. This code is vital for compliance with regulations aimed at minimizing risks associated with hazardous substances in electronic products.

Rated Power Dissipation (P) is a crucial parameter in electronic components that indicates the maximum amount of power the component can safely dissipate without being damaged. It is typically measured in watts and is important for determining the component's thermal management requirements. Exceeding the rated power dissipation can lead to overheating, reduced performance, or even permanent damage to the component. Designers must carefully consider the rated power dissipation when selecting and using electronic components to ensure reliable operation within specified limits.

The parameter "Approval Agency" in electronic components refers to the organization responsible for testing and certifying that a component meets specific safety, quality, and performance standards. These agencies evaluate products to ensure compliance with industry regulations and standards, providing assurance to manufacturers and consumers. Approval from recognized agencies can enhance a component's marketability and acceptance in various applications, particularly in sectors like automotive, aerospace, and healthcare. Common approval agencies include Underwriters Laboratories (UL), International Electrotechnical Commission (IEC), and the American National Standards Institute (ANSI).

the distance between two baselines of lines of type. The word 'leading' originates from the strips of lead hand-typesetters used to use to space out lines of text evenly. The word leading has stuck, but essentially it's a typographer's term for line spacing.

The parameter "Rated (AC) Voltage (URac)" in electronic components refers to the maximum alternating current (AC) voltage that the component is designed to safely operate at continuously. This rating is important for ensuring the component's reliability and longevity under normal operating conditions. Exceeding the rated voltage can lead to overheating, insulation breakdown, and potential failure of the component. It is crucial to adhere to the specified rated voltage to prevent damage and ensure proper functioning of the electronic component within its intended application.

the minimum current which must pass through a circuit in order for it to remain in the 'ON' state.

Thermistor Application in electronic components refers to the use of thermistors, which are temperature-sensitive resistors, in various circuits and systems. These components change resistance with temperature variations, allowing them to be used for temperature sensing, compensation, and control. Common applications include temperature measurement in HVAC systems, automotive temperature monitoring, and household appliances. Their fast response times and high sensitivity make them suitable for precise temperature regulation in various electronic devices.

Voltage - Max is a parameter in electronic components that specifies the maximum voltage that can be safely applied to the component without causing damage. This parameter is crucial for ensuring the proper functioning and longevity of the component. Exceeding the maximum voltage rating can lead to breakdown or failure of the component, potentially causing damage to the entire circuit or system. It is important to always operate electronic components within their specified voltage limits to prevent any issues and ensure reliable performance.

Time to Trip is a parameter used in electronic components, particularly in circuit protection devices such as fuses and circuit breakers. It refers to the amount of time it takes for the component to activate and interrupt the circuit when a fault or overcurrent condition is detected. This parameter is crucial for ensuring the safety and reliability of the electrical system by quickly disconnecting power in case of a fault to prevent damage to the components or potential hazards such as fires. The specific time to trip value can vary depending on the application and the level of protection required, with faster trip times being more critical in certain high-risk environments.

Resistance - Initial (Ri) (Min) refers to the minimum resistance value measured across the terminals of an electronic component when it is first tested. This parameter helps determine the baseline performance of the component under nominal conditions. It is crucial for identifying any defects or inconsistencies in the component's manufacturing process. A low initial resistance value may indicate potential issues affecting the component's functionality.

Resistance - Post Trip (R1) (Max) refers to the maximum resistance value measured across the terminals of an electronic component after it has undergone a trip event, such as a thermal or overcurrent protection activation. This parameter indicates the state of the component post-fault condition, helping to assess whether it can return to normal operation. It is crucial for assessing the reliability and safety of components in circuits, ensuring they do not exhibit failure modes that could lead to further issues.

Current - Trip (It) is a parameter commonly found in electronic components such as circuit breakers, fuses, and protection devices. It refers to the threshold current level at which the component will trip or activate to interrupt the circuit and protect against overcurrent conditions. This parameter is crucial for ensuring the safe operation of electrical systems by preventing damage to equipment and minimizing the risk of electrical hazards. By setting the Current - Trip value appropriately, users can customize the protection level based on the specific requirements of their application.

the current at which the device is guaranteed to trip.

Height Seated (Max) is a parameter in electronic components that refers to the maximum allowable height of the component when it is properly seated or installed on a circuit board or within an enclosure. This specification is crucial for ensuring proper fit and alignment within the overall system design. Exceeding the maximum seated height can lead to mechanical interference, electrical shorts, or other issues that may impact the performance and reliability of the electronic device. Manufacturers provide this information to help designers and engineers select components that will fit within the designated space and function correctly in the intended application.

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