The **5SFP1.6-R** is a specific type of electronic component categorized as a **subminiature, slow-blow (time-delay) fuse**. It is widely used in power supplies, consumer electronics, and industrial equipment to provide overcurrent protection. --- ### 1. Technical Specifications The part number follows a standardized naming convention common in the fuse industry (often associated with brands like **Bel Fuse**). | Parameter | Specification | | :--- | :--- | | **Current Rating** | 1.6 Amperes (1.6A) | | **Voltage Rating (AC)** | 250 Volts | | **Fuse Type** | Glass Tube / Subminiature | | **Characteristic** | Slow-Blow (Time-Delay) | | **Mounting Type** | Through-Hole (Pigtail Leads) | | **Size/Dimension** | 5mm x 20mm (Approximate) | | **RoHS Compliant** | Yes (Indicated by the "-R" suffix) | --- ### 2. Breakdown of the Part Number Understanding the alphanumeric code helps in identifying the physical and electrical properties: * **5SFP**: This prefix usually denotes the series. * **5**: Refers to the physical diameter (5mm). * **SFP**: Indicates a "Slow-blow" characteristic with Axial Leads (pigtails). * **1.6**: Represents the nominal current rating in Amperes. * **-R**: Stands for **RoHS** (Restriction of Hazardous Substances) compliance, meaning it is lead-free. --- ### 3. Key Features * **Time-Delay (Slow-Blow):** Unlike "Fast-Acting" fuses, this component is designed to withstand temporary current surges (inrush current) common in motors or capacitive loads without blowing. * **Axial Leads:** The "pigtail" wires attached to the ends allow the fuse to be soldered directly onto a Printed Circuit Board (PCB) rather than being inserted into a fuse clip. * **Glass Body:** Provides visual inspection capabilities to see if the internal filament has melted. --- ### 4. Common Applications * **Power Adapters:** Protecting against internal shorts while ignoring the initial spark/surge when plugged in. * **LED Drivers:** Handling the initial charging of capacitors. * **Industrial Controls:** Small motors or solenoid protection where start-up current is higher than running current.