The **MDL-1-R** is a specific model of an electronic component, most commonly associated with the **MDL series** of miniature glass tube fuses manufactured by brands like **Eaton (Bussmann)**. --- ### 1. Component Overview The MDL-1-R is a **Time-Delay (Slow-Blow)** glass tube fuse. In electronics, slow-blow fuses are designed to withstand temporary surges in current (like motor startups) without blowing, but will disconnect the circuit if a sustained overload occurs. ### 2. Technical Specifications The "1" in the part number signifies its current rating, and the "R" signifies RoHS compliance. | Feature | Specification | | :--- | :--- | | **Current Rating** | 1 Amp | | **Voltage Rating** | 250 VAC | | **Fuse Type** | Time-Delay (Slow-Blow) | | **Material** | Glass Tube, Nickel-plated Brass Endcaps | | **Size** | 1/4" x 1-1/4" (6.35mm x 31.75mm) | | **Compliance** | RoHS Compliant (Lead-Free) | ### 3. Key Electronic Characteristics * **Time-Delay Property:** Unlike "Fast-Acting" fuses (which blow almost instantly at 200% load), the MDL-1-R allows a brief window of overcurrent. This is critical for inductive loads. * **Interrupting Rating:** This defines the maximum current the fuse can safely stop without physically exploding or arcing. At 250VAC, the interrupting rating is typically 35A. * **Resistance:** It has a low cold resistance (measured in Ohms) to minimize voltage drop across the component during normal operation. ### 4. Typical Applications The MDL-1-R is found in various electronic devices where "inrush current" is expected: 1. **Power Supplies:** Protecting the primary side of transformers. 2. **Consumer Electronics:** Older televisions, amplifiers, and audio equipment. 3. **Industrial Controls:** Small motors or solenoids that draw high current for a millisecond upon activation. --- ### 5. Identification Code Breakdown ```text MDL - 1 - R | | | | | +-- RoHS Compliant (Lead-Free) | +------ Amperage Rating (1 Amp) +----------- Series Name (Time-Delay Glass Tube) ```