The **ABC-14-R** is a specific model of fast-acting ceramic tube fuse manufactured by **Eaton (formerly Bussmann)**. It is part of the "ABC" series, which is widely used in power supplies, instrumentation, and electronic circuits. --- ## 1. Technical Specifications The "14" in the part number indicates the current rating, and the "R" signifies RoHS compliance. | Feature | Specification | | :--- | :--- | | **Current Rating** | 14 Amperes (14A) | | **Voltage Rating (AC)** | 250 VAC | | **Voltage Rating (DC)** | 125 VDC | | **Fuse Type** | Fast-Acting (F) | | **Physical Size** | 1/4" x 1-1/4" (6.35mm x 31.75mm) | | **Body Material** | Ceramic Tube | | **End Cap Material** | Nickel-plated Brass | | **Interrupting Rating** | 200A @ 250VAC / 10,000A @ 125VAC | --- ## 2. Key Characteristics ### Fast-Acting Performance Unlike "Slow-Blow" (Time-Delay) fuses, the ABC-14-R is designed to open very quickly when an overcurrent occurs. This is critical for protecting sensitive electronic components that cannot withstand even brief surges. ### Ceramic vs. Glass The ABC series uses a **ceramic tube** instead of glass. This allows for: * **Higher Interrupting Ratings:** It can safely break a circuit with a much higher potential fault current without the fuse body shattering. * **Arc Suppression:** The ceramic body is often filled with a granular material (like sand) to extinguish the internal arc quickly. --- ## 3. Part Number Breakdown The nomenclature for this part follows a specific standard: | Segment | Meaning | | :--- | :--- | | **ABC** | Series Name (Fast-acting ceramic 1/4" x 1-1/4") | | **14** | Ampere Rating (14 Amps) | | **-R** | RoHS Compliant (Lead-free) | --- ## 4. Common Applications * **Power Supplies:** Protecting the input stage of AC/DC converters. * **Industrial Controls:** Protecting PLCs and relay logic. * **Medical Equipment:** Due to its high reliability and fast response. * **Test Equipment:** Protecting internal circuitry of multimeters and oscilloscopes.