The term **863-R** typically refers to a specific series or nomenclature used by electronic component manufacturers, most notably **Littelfuse** (for fuse holders) or various semiconductor manufacturers for specific diode or resistor packaging. Below is an overview of the most common electronic part associated with the "863-R" designation, which is the **Littelfuse 863 series fuse holder**. --- ## 1. Littelfuse 863-R Series (Fuse Holders) The 863-R series is a popular line of panel-mount fuse holders designed for **5x20mm fuses**. These are critical safety components that protect circuits from overcurrent conditions. ### Technical Specifications | Feature | Description | | :--- | :--- | | **Compatible Fuse Size** | 5 x 20 mm | | **Current Rating** | Up to 10 Amperes | | **Voltage Rating** | 250 Volts | | **Mounting Type** | Panel Mount (Snap-in or Threaded) | | **Termination** | Solder or Quick Connect terminals | | **Material** | Thermoplastic (Body), Tin-plated Copper Alloy (Contacts) | ### Key Features * **Safety Standards:** Usually UL recognized and CSA certified. * **Low Profile:** Designed to take up minimal space on the front panel of a device. * **Ease of Access:** Allows users to replace blown fuses from the exterior of the equipment without opening the chassis. --- ## 2. Common Applications Parts labeled with the 863-R designation (specifically fuse holders) are found in: 1. **Power Supplies:** Protecting the input AC line. 2. **Consumer Electronics:** Amplifiers, televisions, and kitchen appliances. 3. **Industrial Controls:** Protecting sensitive control boards from surges. 4. **Test Equipment:** Ensuring internal circuitry is safe during high-load testing. --- ## 3. Identification and Variants The "-R" suffix in electronics often denotes **RoHS Compliance** (Restriction of Hazardous Substances), meaning the part is manufactured without lead, mercury, or cadmium. ### How to read the Part Number ```text 863 - XXX - R | | | Series Type RoHS Compliant ``` --- ## 4. Maintenance and Installation When working with 863-R components, keep the following in mind: * **De-energize:** Always disconnect power before replacing a fuse in the holder. * **Matching Ratings:** Ensure the fuse inserted into the 863-R holder does not exceed the 10A/250V limit of the holder itself. * **Soldering:** Use heat sinks when soldering to the terminals to prevent melting the plastic housing.