The **5MT2.5-R** is a specific type of electronic component used for circuit protection. It belongs to the **5MT series**, which are subminiature, slow-blow (time-delay) fuses designed for various power supply and industrial applications. Below is a detailed breakdown of its specifications and characteristics. ### 1. General Specifications The part number can be decoded to understand its primary electrical behavior: | Parameter | Specification | | :--- | :--- | | **Series** | 5MT (Subminiature Glass Body) | | **Current Rating** | 2.5 Amps | | **Voltage Rating** | 250V AC | | **Fuse Type** | Time-Delay / Slow-Blow | | **Material** | Glass Tube with Nickel-plated Brass Endcaps | | **RoHS Compliant** | Yes (Indicated by the "-R" suffix) | --- ### 2. Key Electrical Characteristics The 5MT2.5-R is engineered to withstand temporary surges in current (such as motor startups or capacitor charging) without blowing immediately. * **Interrupting Rating:** Usually rated for 100A at 250V AC. * **Melting Integral ($I^2t$):** This value represents the energy required to melt the fuse element. For a slow-blow fuse like the 5MT2.5-R, this value is higher than a fast-acting fuse of the same amperage. * **Time-Current Curve:** It will typically hold 100% of the rated current indefinitely and open within specific time windows when exposed to 135% or 200% of the rated current. --- ### 3. Physical Dimensions The "5MT" series often follows a standard cartridge size format, though it is smaller than the common 3AG (6.3 x 32mm) fuses. * **Diameter:** 5 mm * **Length:** 20 mm * **Mounting Type:** Often used with fuse clips, blocks, or panel-mount holders. --- ### 4. Applications Because of its **Slow-Blow** nature, the 5MT2.5-R is commonly found in: 1. **Power Supplies:** Protecting against inrush current when the device is first turned on. 2. **Consumer Electronics:** Televisions, audio equipment, and chargers. 3. **Industrial Equipment:** Small motors or solenoid-driven devices that require a surge of current to activate. 4. **LED Lighting:** Handling the capacitive inrush of LED drivers. --- ### 5. Part Number Suffix Meaning * **5MT:** The series name (Slow-Blow, 5x20mm). * **2.5:** The rated current (2.5 Amperes). * **-R:** Indicates compliance with **RoHS** (Restriction of Hazardous Substances) standards, meaning it is lead-free. ---