## Technical Overview of 5TTP2-R Fuse The **5TTP2-R** is a specific type of electronic component, categorized as a **Time-Lag (Slow-Blow) Glass Tube Fuse**. It is part of the 5TTP series manufactured by Bel Fuse Inc. and is designed to protect electrical circuits from overcurrent and short-circuit conditions. --- ### 1. Key Technical Specifications Below are the primary electrical and physical characteristics of the 5TTP2-R: | Feature | Specification | | :--- | :--- | | **Current Rating** | 2 Amperes (2A) | | **Voltage Rating** | 250V AC | | **Fuse Type** | Time-Lag / Slow-Blow (T) | | **Body Material** | Glass | | **Mounting Type** | Through-hole (Pigtail Leads) | | **Dimensions** | 5mm x 20mm | | **Interrupt Rating** | 100A @ 250V AC | | **RoHS Compliant** | Yes (indicated by the "-R" suffix) | --- ### 2. Component Structure and Features * **Pigtail Leads:** The "P" in the part number typically signifies that this fuse comes with axial leads (wires) soldered to the end caps. This allows it to be soldered directly onto a Printed Circuit Board (PCB) rather than being inserted into a fuse holder. * **Slow-Blow Characteristic:** Unlike "Fast-Acting" fuses, the 5TTP2-R is designed to withstand temporary surges in current (such as motor startups or capacitive inrush) without blowing immediately. * **Glass Body:** The transparent glass allows for easy visual inspection to see if the internal element has melted (blown). * **RoHS Compliance:** The "-R" suffix ensures the part meets environmental standards regarding lead-free construction and hazardous substances. --- ### 3. Common Applications Because of its slow-blow nature and PCB mounting style, this part is commonly found in: 1. **Power Supplies:** Protecting the input stage from sudden power spikes. 2. **Consumer Electronics:** Used in TVs, monitors, and audio equipment. 3. **Industrial Controllers:** Protecting sensitive circuitry that may experience brief inductive loads. 4. **Chargers:** Small-scale AC/DC adapters. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying similar components: | Segment | Meaning | | :--- | :--- | | **5TT** | Series name (Time-lag, 5x20mm) | | **P** | Pigtail (Axial Lead) version | | **2** | 2 Amp current rating | | **-R** | RoHS Compliant |