The **MDL-6-R** is a specific model of electronic component belonging to the **MDL series** of fuses. It is a miniature, glass-tube, time-delay fuse commonly used in power supplies and consumer electronics. --- ### 1. Technical Specifications The table below outlines the core electronic characteristics of the MDL-6-R: | Property | Value / Specification | | :--- | :--- | | **Current Rating** | 6 Amperes (6A) | | **Voltage Rating (AC)** | 250 Volts AC | | **Fuse Type** | Time-Delay (Slow-Blow) | | **Material** | Glass Tube with Nickel-Plated Brass Endcaps | | **Dimensions** | 1/4" x 1-1/4" (6.35mm x 31.75mm) | | **Interrupting Rating** | 200A at 250Vac / 10,000A at 125Vac | | **RoHS Compliant** | Yes (indicated by the "-R" suffix) | --- ### 2. Key Electronic Features #### A. Time-Delay (Slow-Blow) Function The primary electronic characteristic of this fuse is its "Time-Delay" capability. Unlike "Fast-Acting" fuses, the MDL-6-R is designed to withstand temporary **inrush currents** or surges. * **Use Case:** Electric motors or transformers that draw a high amount of current for a fraction of a second when starting up. * **Mechanism:** The internal filament has a thermal mass that requires a sustained overcurrent to melt, rather than blowing instantly on a brief spike. #### B. The "-R" Suffix In the Eaton/Bussmann naming convention, the **-R** stands for **RoHS Compliance**. This means the part is manufactured without the use of lead or other hazardous substances restricted by the European Union’s environmental standards. #### C. Physical Construction The glass tube allows for easy **visual inspection**. If the fuse has blown due to a massive short circuit, the glass may appear charred. If it has blown due to a slight overcurrent over time, the internal wire will simply be broken. --- ### 3. Applications * **Power Supplies:** Protecting the input stage from surges. * **HVAC Systems:** Used in control boards. * **Industrial Equipment:** Protection for small motors and solenoids. * **Consumer Electronics:** Used in older amplifiers and power strips. --- ### 4. Safety Warning When replacing an MDL-6-R, never substitute it with a **Fast-Acting (AGC)** fuse of the same amperage. A fast-acting fuse will likely "blow" immediately upon device startup due to the initial inrush current.