The **5TTP 5-R** is a specific type of electronic component—specifically a **time-delay (slow-blow) glass tube fuse**. These are commonly used in power supplies, monitors, and consumer electronics to protect circuits from overcurrent. --- ## 1. Technical Specifications Below are the primary electrical characteristics for the 5TTP 5-R: | Parameter | Specification | | :--- | :--- | | **Part Number** | 5TTP 5-R | | **Amperage Rating** | 5 Amperes (5A) | | **Voltage Rating** | 125V / 250V AC | | **Fuse Type** | Glass Tube (Slow Blow / Time Delay) | | **Dimensions** | 5mm x 20mm (Standard Small Size) | | **Termination Style** | Pigtail Leads (Axial Leads) | | **Material** | Glass body, Brass caps (Nickel plated) | --- ## 2. Breakdown of the Part Number The part number follows a specific nomenclature used by manufacturers like **Bel Fuse**: * **5TTP**: The series designation. * **5**: Refers to the physical diameter (5mm). * **TTP**: Indicates a "Time-Lag" (Slow Blow) characteristic with **Pigtail Leads** (wires soldered to the ends for PCB mounting). * **5**: The current rating (5 Amps). * **-R**: RoHS Compliant (Lead-free). --- ## 3. Key Electronic Features ### Time-Delay (Slow-Blow) Function Unlike "Fast-Acting" fuses, the 5TTP 5-R is designed to withstand short-duration **inrush currents** or surges. This is crucial for devices like motors or power transformers that draw a lot of power the moment they are turned on but then settle into a lower operating current. ### Pigtail Leads (Axial Design) The "P" in the name signifies that this fuse has wire leads. * **Mounting:** It is intended to be soldered directly onto a Printed Circuit Board (PCB) rather than placed in a traditional fuse clip. * **Benefit:** This provides a more secure, vibration-resistant connection and saves space on the board. ### Interrupting Rating This fuse typically has a high interrupting rating (usually 100A at 250V AC), which is the maximum current the fuse can safely stop without physically exploding or arcing over. --- ## 4. Typical Applications * **Power Supplies:** Protecting the input stage of AC/DC adapters. * **Industrial Controls:** Used in PLC (Programmable Logic Controller) outputs. * **Consumer Electronics:** Found in LED drivers, chargers, and audio equipment where space is limited. ---