The **FNQ-R-1-1/8** is a high-performance industrial fuse part of the **Bussmann Fusetron** series. It is specifically designed as a "Class CC" current-limiting time-delay fuse. ### 1. Technical Specifications The following table summarizes the key electrical characteristics of the FNQ-R-1-1/8: | Feature | Specification | | :--- | :--- | | **Manufacturer** | Eaton (Bussmann Series) | | **Amperage Rating** | 1.125 Amps (1-1/8 A) | | **Voltage Rating (AC)** | 600 Vac | | **Interrupting Rating** | 200,000 Amps RMS Symmetrical | | **Fuse Class** | Class CC | | **Response Time** | Time-Delay (Slow Blow) | | **Body Material** | Melamine Tube with Nickel-plated Brass Endcaps | | **Dimensions** | 13/32" x 1-1/2" (10.3mm x 38.1mm) | --- ### 2. Core Functional Features * **Time-Delay Characteristic:** This fuse is designed to withstand temporary "inrush" currents (surges) without blowing. This is critical for inductive loads like small motors or control transformers that draw more current at startup than during normal operation. * **Rejection Feature:** As a Class CC fuse, it has a physical "rejection tip" on one end. This prevents the installation of fuses with lower voltage or interrupting ratings into the same fuse holder, ensuring safety integrity. * **Current Limiting:** It is highly effective at stopping short-circuit currents quickly, preventing damage to downstream sensitive electronic components. --- ### 3. Common Applications The FNQ-R-1-1/8 is typically found in industrial control panels and machinery: 1. **Branch Circuit Protection:** Used to protect specific branches of an electrical system. 2. **Control Transformers:** Ideal for protecting the primary side of control power transformers. 3. **Solenoids and Inductive Loads:** Used where high-frequency switching and minor surges occur. --- ### 4. Cross-Reference & Alternatives If you are looking for equivalents from other manufacturers, the following parts are generally compatible: | Brand | Series / Part Number | | :--- | :--- | | **Littelfuse** | KLDR 1.125 | | **Mersen (Ferraz Shawmut)** | ATDR 1-1/8 |