The **0-4A4-R** is a specific part number belonging to a series of high-performance, ultra-compact surface-mount fuses, typically manufactured by companies like **Littelfuse** (specifically the 467 Series). Below is a detailed breakdown of its electronic specifications and characteristics. --- ### 1. Technical Specifications The part number follows a specific nomenclature where "04" or "4A" refers to its current rating. Based on the standard 0603-sized fast-acting fuse series: | Property | Specification | | :--- | :--- | | **Component Type** | Surface Mount Fuse (SMD) | | **Package Size** | 0603 (1.6mm x 0.8mm) | | **Current Rating** | 4.0 Amperes (4A) | | **Voltage Rating (DC)** | 32V DC | | **Voltage Rating (AC)** | 32V AC | | **Interrupting Rating** | 35A @ 32VDC | | **Fuse Characteristic** | Very Fast-Acting (FF) | | **Resistance (Cold)** | ~0.013 Ohms | --- ### 2. Key Features * **Low Profile:** The 0603 footprint is ideal for space-constrained applications like smartphones and laptops. * **Thin-Film Technology:** Uses advanced thin-film techniques to ensure precise and consistent electrical characteristics. * **Lead-Free/RoHS Compliant:** The "-R" suffix typically denotes compliance with environmental regulations (RoHS) and lead-free manufacturing. * **Thermal Stability:** Designed to operate in environments ranging from -55°C to +90°C. --- ### 3. Common Applications These fuses are primarily used to provide overcurrent protection for low-voltage sensitive electronics: 1. **Consumer Electronics:** Tablets, smartphones, and digital cameras. 2. **Computing:** Hard Disk Drives (HDDs), Solid State Drives (SSDs), and USB ports. 3. **Displays:** LCD/LED monitors and backlight inverters. 4. **Connectivity:** Bluetooth modules and Wi-Fi cards. --- ### 4. Part Number Breakdown (Example) While specific manufacturers vary, the code generally breaks down as follows: ```text 0-4A4-R | | | | | | | +-- RoHS Compliant / Tape & Reel Packaging | | +---- Series Identifier (e.g., 467 Series) | +------ Current Rating (4 Amps) +-------- Quantity or Manufacturing Prefix ``` ---