Littelfuse Inc. RHEF200-2

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.

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

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.

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

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.

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.