The **MDL-5-R** is a specific model of electronic component belonging to the **MDL series**. It is a **Time-Delay (Slo-Blo) Glass Tube Fuse**. These components are critical for circuit protection, designed to withstand temporary surges in current without blowing immediately. --- ## 1. Technical Specifications The "5-R" suffix indicates specific electrical ratings and environmental compliance. | Parameter | Specification | | :--- | :--- | | **Current Rating** | 5 Amperes (5A) | | **Voltage Rating** | 250 Volts AC | | **Fuse Type** | Time-Delay / Slow Blow | | **Body Material** | Glass Tube | | **Dimensions** | 1/4" x 1-1/4" (6.3mm x 32mm) | | **RoHS Compliant** | Yes (Indicated by the "-R") | | **Interrupt Rating** | 200A at 250Vac | --- ## 2. Key Features and Operation Understanding the internal behavior of the MDL-5-R is essential for correct application: * **Time-Delay Characteristic:** Unlike "Fast-Acting" fuses, the MDL-5-R allows a short-duration current spike (inrush current) to pass. This is necessary for devices that draw extra power when starting up. * **Visual Inspection:** Because the body is made of glass, the internal filament is visible. If the fuse blows due to a short circuit, the glass may turn dark; if it blows due to a slight overload, the filament will simply be broken. * **Safety Standards:** These fuses are typically UL Listed and CSA Certified, ensuring they meet rigorous safety benchmarks for fire and electrical hazards. --- ## 3. Typical Applications The MDL-5-R is commonly found in electronics where inductive loads are present: 1. **Consumer Electronics:** Power supplies for televisions and audio amplifiers. 2. **Industrial Equipment:** Control circuits and small motors. 3. **Appliances:** Microwave ovens and kitchen equipment that require an initial surge to start a motor or magnetron. --- ## 4. Part Number Breakdown The part number can be decoded as follows: ```text MDL - 5 - R | | | | | └── RoHS Compliant | └────── Current Rating (5 Amps) └─────────── Series Name (Time-Delay Glass Fuse) ```