The **5TTP 1-R** is a specific type of electronic protection component, primarily categorized as a **Time-Delay Glass Body Cartridge Fuse**. It is manufactured by **Bel Fuse Inc.** and is widely used to protect circuits from overcurrent and short-circuit conditions. --- ### 1. Technical Specifications The following table summarizes the key electrical and physical characteristics of the 5TTP 1-R: | Feature | Specification | | :--- | :--- | | **Current Rating** | 1 Amp (1A) | | **Voltage Rating (AC)** | 250V AC | | **Fuse Type** | Time-Lag (Slow Blow) | | **Material** | Glass Body / Nickel Plated Brass Caps | | **Mounting Type** | Through Hole (Axial Leads) | | **Size / Dimension** | 5mm x 20mm | | **Interrupting Rating** | 35A @ 250V AC / 10kA @ 125V AC | | **RoHS Status** | RoHS 6 Compliant (Lead-Free) | --- ### 2. Key Components & Construction The "5TTP" series has specific design elements that differentiate it from standard fuses: * **Axial Leads:** The "-R" suffix often denotes that the fuse comes with pigtail leads (wires) soldered to the end caps. This allows the fuse to be soldered directly onto a Printed Circuit Board (PCB) without a fuse holder. * **Time-Lag Mechanism:** Unlike "Fast-Acting" fuses, this part is designed with a thermal delay. It can withstand temporary surges (like motor startups or capacitor inrushes) without blowing, but it will disconnect if a sustained overload occurs. * **Glass Tube:** The transparent body allows for easy visual inspection to see if the internal filament has melted. --- ### 3. Part Number Breakdown Understanding the nomenclature helps in identifying similar parts: * **5TT:** Represents the series (Time-delay, 5x20mm glass fuse). * **P:** Indicates the "Pigtail" or Axial Lead configuration. * **1:** Represents the Amperage (1 Amp). * **-R:** Indicates RoHS compliance. --- ### 4. Typical Applications The 5TTP 1-R is commonly found in: 1. **Consumer Electronics:** Power supplies for TVs, monitors, and audio equipment. 2. **Industrial Equipment:** Small motors or control circuits that experience brief current spikes. 3. **Chargers:** Internal protection for AC/DC adapters.