The **5TTP 7-R** is a specific type of electronic protection component, primarily categorized as a **Time-Delay (Slow-Blow) Glass Tube Fuse**. It is manufactured by **Bel Fuse Inc.** and is part of their 5TTP series. --- ### ## Technical Specifications Below are the primary technical characteristics of the 5TTP 7-R: | Parameter | Specification | | :--- | :--- | | **Series** | 5TTP (5x20mm) | | **Current Rating** | 7 Amperes (7A) | | **Voltage Rating (AC)** | 125V / 250V AC | | **Fuse Type** | Time-Delay / Slow-Blow | | **Body Material** | Glass Tube | | **Terminations** | Axial Leads (Pigtail) | | **Dimensions** | 5mm (Diameter) x 20mm (Length) | | **RoHS Compliant** | Yes (Indicated by the "-R" suffix) | --- ### ### Key Features 1. **Axial Leads (Pigtail Design):** Unlike standard fuses that sit in a clip, the "P" in 5TTP indicates axial leads. These are soldered directly onto a Printed Circuit Board (PCB), eliminating the need for a separate fuse holder. 2. **Time-Delay (Slow-Blow) Characteristic:** This part is designed to withstand temporary surges or "inrush currents" (common in motors or power supplies) without blowing. It will only open the circuit if the overload persists. 3. **Glass Body Construction:** The transparent glass allows for easy visual inspection to see if the internal filament has melted. 4. **Safety Standard Compliance:** The 5TTP series is typically UL (Underwriters Laboratories) and CSA certified, ensuring it meets North American safety standards for overcurrent protection. --- ### ### Typical Applications The 5TTP 7-R is commonly found in the following electronic environments: * **Power Supplies:** Protecting the input stage from sustained overcurrent. * **Consumer Electronics:** Televisions, audio amplifiers, and chargers. * **Industrial Equipment:** Control boards where vibration might make traditional fuse clips unreliable (leads provide a secure connection).