## Overview of the 5MTP 100-R The **5MTP 100-R** is a specific type of electronic fuse manufactured by **Bel Fuse Inc.** It belongs to the 5MTP series, which are medium-slow blow, high-breaking capacity radial leaded micro fuses. These are commonly used to protect sensitive electronic circuits from overcurrent conditions. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Current Rating** | 100mA (0.1A) | | **Voltage Rating (AC)** | 250V AC | | **Fuse Type** | Glass Tube / Radial Leaded | | **Characteristic** | Medium Time-Lag (Slow Blow) | | **Breaking Capacity** | 35A @ 250V AC | | **Termination Style** | Through-hole (Radial Leads) | | **RoHS Status** | Compliant (indicated by the "-R" suffix) | --- ### 2. Physical Construction The "5MTP" designation refers to the physical form factor and mounting style: * **Body Material:** Typically a glass tube housing the fuse element. * **Leads:** It features two radial leads extending from the same side of the body, allowing it to be soldered directly onto a Printed Circuit Board (PCB) without a separate fuse holder. * **Size:** Standard 5x20mm internal architecture, but configured for vertical PCB mounting. --- ### 3. Functional Characteristics * **Medium Time-Lag:** Unlike "Fast-Acting" fuses, the 5MTP 100-R is designed to withstand temporary surges or "inrush currents." This is useful in circuits where a brief spike in power is normal during startup (like motors or large capacitors) but a sustained overcurrent would be damaging. * **The "-R" Suffix:** This indicates that the part is Lead-Free and complies with the **RoHS** (Restriction of Hazardous Substances) directive. * **Safety Standards:** These fuses are usually tested and recognized by agencies such as UL (Underwriters Laboratories) and CSA. --- ### 4. Common Applications Due to its low amperage (100mA) and slow-blow nature, this part is frequently found in: 1. **Power Supplies:** Protecting the primary side of low-wattage AC/DC adapters. 2. **Industrial Controls:** Protecting delicate sensors or control logic boards. 3. **Consumer Electronics:** Used in chargers, LED drivers, and small household appliances where space is limited. --- ### 5. Identification Code Breakdown ```text 5MTP 100 -R | | | Series Amps RoHS Compliant (Radial (100mA) Leaded) ```