1812L110/33MR PTC Resettable Fuses by Littelfuse Inc.

Lifecycle status of the part, such as active or obsolete. Indicates availability and long-term support from the manufacturer. Check this before design-in to avoid last-time buys or supply disruptions. Verify with the datasheet or distributor for current status.

Shows whether the component complies with the EU REACH regulation. Essential for legal market access in Europe. Check the manufacturer's latest statement to confirm that no substances of very high concern are present above the threshold.

Export Control Classification Number assigned by the U.S. government. Determines whether the component requires an export license. Essential for international trade compliance. Verify the ECCN with the manufacturer or supplier before shipping to avoid legal issues.

Indicates whether the component is manufactured without lead, complying with RoHS and similar regulations. Check this attribute to ensure environmental compliance for your market. Verify against the datasheet for exact material declarations.

Specifies how the component is attached to the PCB, such as through-hole or surface mount. This affects assembly processes, thermal performance, and mechanical strength. Buyers should verify compatibility with their manufacturing capabilities and design requirements.

Published indicates the date when the product data was released or updated in the catalog. It helps buyers assess the freshness of the information and whether the component is current or possibly obsolete. Check the datasheet for the latest revisions.

Indicates the typical duration from order confirmation to shipment from the manufacturer's facility. This helps you plan production schedules and inventory. Verify current lead times with your distributor or supplier, as they may vary based on order quantity, product availability, and market conditions.

Indicates the form of delivery for the component, such as tape and reel, tube, or tray. This affects handling, storage, and assembly processes. Verify the packaging type matches your production requirements and equipment compatibility.

Specifies the ambient temperature range within which the component reliably functions. Compare this with your application's thermal environment to ensure proper operation. Always verify against the datasheet for derating curves and maximum ratings.

Describes the method used to connect the component to the circuit board, such as solder, press-fit, or wire wrap. This affects assembly processes, reliability, and repairability. Check the termination type against your PCB footprint and soldering process to ensure compatibility.

Maximum power the component can safely dissipate as heat without exceeding its thermal limits. Compare this rating with your application's expected power loss to ensure reliable operation. Always verify against the datasheet's derating curves and ambient temperature conditions.

Specifies the maximum continuous current the component can safely carry under specified conditions. Compare this value with your circuit's expected load to ensure reliable operation. Always verify against the datasheet for temperature derating and mounting considerations.

Lists the product categories or classifications assigned to this component, such as connectors, capacitors, or modules. This helps in filtering and comparing similar parts. Review the categories to ensure the component fits your application and to find alternative parts in the same class.

Electrical resistance value in ohms, defining opposition to current flow. Critical for current limiting, voltage division, and signal conditioning. Always check tolerance and power rating in the datasheet for reliable circuit operation.

Maximum power the component can safely dissipate as heat without damage. Exceeding this may cause failure. Check datasheet for thermal resistance and derating curves under your operating conditions.

Specifies how the component attaches to the PCB or assembly, such as surface mount, through-hole, or chassis mount. This affects soldering process, mechanical stability, and thermal performance. Verify compatibility with your board layout and assembly capabilities.

Indicates whether the component is lead-free per RoHS or other directives. Buyers use this to verify environmental compliance and avoid restricted substances. Always confirm with the datasheet or certificate of compliance.

Indicates the total number of electrical connection points on the component, such as pins or pads. This is critical for PCB footprint design and assembly. Verify it matches the package specification to ensure proper soldering and connectivity.

Physical height of the component, measured from the mounting surface to the topmost point. This dimension is critical for clearance in compact assemblies and for ensuring proper fit within enclosures. Always verify against the datasheet for tolerance and mounting considerations.

Harmonized Tariff Schedule code used for customs classification of electronic components. Helps determine duties and regulatory requirements. Buyers should confirm the code with a customs broker for accurate shipping.

Specifies the highest continuous current the component can safely carry under specified conditions. Compare this rating with your circuit's expected load to prevent overheating or failure. Always verify against the datasheet's derating curves and ambient temperature limits.

Defines the maximum continuous voltage that can be applied across the component during normal operation without degradation. This is critical for capacitors, connectors, and insulation ratings. Check the datasheet to confirm the safe operating range and any environmental derating.

Specifies the maximum DC voltage the component can safely handle under rated conditions. Engineers compare this to the circuit's operating voltage to ensure adequate margin. Always verify against the datasheet's derating curves for temperature and reliability.

Specifies the packaging format for delivery, such as tube, reel, tray, or tape and reel. This affects handling, storage, and assembly processes. Verify the packing method against your production requirements and the datasheet to ensure compatibility with your pick-and-place equipment.

Specifies the voltage range within which the component operates correctly. Check the datasheet to ensure your power supply meets the minimum and maximum limits, as exceeding them can damage the device or cause malfunction.

Indicates the physical arrangement of terminals on the component, such as through-hole, surface mount, or edge. This affects PCB layout and assembly. Verify against the datasheet to ensure compatibility with your board design and manufacturing process.

Identifies the company that designed and produced the component. Buyers often filter by manufacturer to ensure brand reliability, quality standards, and supply chain consistency. Verify the manufacturer against the datasheet and official packaging to avoid counterfeit parts.

Specifies the conductive material of the switch terminals, such as brass, copper, or silver alloy. This affects electrical conductivity, corrosion resistance, and solderability. Check the datasheet to ensure the material meets your application's current rating and environmental requirements.

Metric case size code for surface-mount components, such as 0402 or 0603. This code indicates the physical dimensions of the component body. Verify it against the datasheet to ensure proper PCB footprint and assembly compatibility.

Specifies the standard imperial case size code for surface-mount components, such as resistors, capacitors, and inductors. This code helps identify the physical dimensions and footprint of the component. Verify the case code against the datasheet to ensure proper PCB layout and compatibility with your assembly process.

A more specific classification within the main product category, such as 'Ceramic Capacitor' under 'Capacitors'. This helps narrow down search results and compare similar components. Use it to filter products with similar characteristics and intended applications.

Indicates the physical configuration of component leads, such as straight, angled, or formed. This affects PCB mounting, clearance, and soldering. Verify the terminal shape against your board layout and assembly process to ensure proper fit and reliable connections.

Specifies the intended circuit role, such as inrush current limiting, temperature sensing, or circuit protection. Engineers compare this to ensure the thermistor's response characteristics match the application's thermal and electrical demands. Verify against the datasheet's application notes.

Select the component category that best matches your application, such as resistor, capacitor, diode, or connector. This classification helps narrow down the correct part family and ensures compatibility with your circuit design. Verify the type against the datasheet to avoid mismatches.

Indicates the certification body that has tested and approved the component for safety or regulatory compliance. Buyers should verify this matches their target market requirements, and engineers should check the datasheet for the specific standards and marks.

Indicates the specific product subcategories or classifications within the broader component family. Helps narrow down search results and identify the exact type of component needed for your design. Review the subcategory to ensure compatibility with your application.

Physical dimensions of the component, typically length, width, and height. These measurements are critical for PCB layout and mechanical fit. Always verify against the datasheet for exact tolerances and mounting requirements.

Indicates the product series or family, grouping components with similar design and specifications. Helps identify compatible parts and compare within a product line. Verify the series against the datasheet to ensure correct application.

Physical package or case type of the component, defining its dimensions, mounting style, and thermal characteristics. Common types include SMD, through-hole, BGA, and QFN. Choose the package that fits your PCB layout and assembly process. Verify the exact package code in the datasheet for footprint compatibility.

Specifies the maximum continuous current that a resettable fuse or PTC device can carry without tripping. Compare this value with your circuit's normal operating current to ensure stable operation. Verify against the datasheet for temperature derating and tolerance.

Time required for a protection device to open its circuit after an overcurrent or fault condition. Compare this value with your system's tolerance to avoid nuisance trips. Verify against the datasheet for specific fault currents.

Specifies the maximum continuous voltage the component can safely withstand under normal operating conditions. Engineers compare this rating to the circuit's expected voltage to ensure reliable operation. Always verify against the datasheet for derating factors and environmental conditions.

The unique part number assigned by the original component manufacturer. Use this to cross-reference datasheets, verify specifications, and ensure the exact component matches your design requirements. Always confirm the number against the manufacturer's official documentation.

Specifies the maximum current at which the device remains in the conducting state. Compare this value with the circuit's operating current to ensure reliable latching. Verify against the datasheet for temperature derating and tolerance.

Maximum resistance of a resettable fuse after it has tripped and is in the high-resistance state. Compare this value to ensure the circuit's leakage current stays within acceptable limits after a fault event. Verify against the datasheet for your specific operating conditions.

The current level at which a protective device, such as a circuit breaker or fuse, activates to interrupt the circuit. This parameter is critical for overcurrent protection and must be matched to the load and wiring to prevent nuisance trips or damage.

Lists any extra characteristics or capabilities beyond the standard specifications, such as built-in protection, special mounting options, or enhanced performance. Review these features to ensure they meet your application's specific needs and compare them across similar parts.

Specifies the minimum initial resistance of the component before any electrical or thermal stress is applied. This value is critical for inrush current limiting and circuit protection. Verify against the datasheet to ensure the component meets your design requirements.

Maximum physical thickness of the component body, measured in millimeters or inches. Compare this value with your enclosure clearance and PCB spacing. Always verify against the datasheet for exact tolerances, especially for connectors and modules.

This code indicates the terminal finish material per JESD-609 standard. It helps identify the plating type for soldering compatibility and environmental compliance. Check the datasheet for the exact code and its meaning.

Indicates the floor life of a component before it must be baked prior to soldering. Higher levels require stricter handling and shorter exposure times. Verify the MSL rating in the datasheet to ensure proper storage and assembly conditions.

Indicates whether the component complies with the EU RoHS directive restricting hazardous substances. Buyers should verify this status for regulatory compliance and market access. Check the datasheet or certificate for exact compliance details.

Indicates whether the product contains substances of very high concern as per the REACH regulation. Buyers should verify this for compliance with EU environmental standards, especially when exporting to Europe. Check the manufacturer's declaration or datasheet for accurate SVHC status.

Export Control Classification Number assigned by the U.S. Commerce Department. It determines export licensing requirements for electronic components. Verify the ECCN against the manufacturer's datasheet or export compliance documentation before shipping internationally.

Harmonized Tariff Schedule of the United States code for customs classification. Essential for import/export documentation and duty calculation. Verify the correct code with a trade specialist to avoid customs delays.

Specifies the plating material on component terminals, affecting solderability, corrosion resistance, and long-term reliability. Compare finishes like tin, gold, or silver for your assembly process and environmental requirements. Verify against datasheet for compliance.