### Overview of the FNQ-R-6 Fuse The **FNQ-R-6** is a high-performance, industrial-grade fuse belonging to the **Limitron™ CC Series**. It is a **Time-Delay** (slow-blow) fuse designed specifically for branch circuit protection. The "6" in the part number indicates its current rating of **6 Amperes**. --- ### Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Amperage Rating** | 6 Amps | | **Voltage Rating (AC)** | 600 Vac | | **Interrupting Rating** | 200,000 Amps RMS Symmetrical | | **Class** | CC | | **Response Time** | Time-Delay (12 seconds minimum at 200% rating) | | **Material** | Melamine tube with Nickel-plated brass endcaps | | **Mounting Style** | Holder / Clip (Rejection type) | --- ### Core Characteristics #### 1. Rejection Feature The FNQ-R series features a physical "rejection tip" on one end. This ensures that the fuse can only be inserted into a Class CC fuse holder. This safety mechanism prevents the user from accidentally replacing it with a fuse of lower interrupting capacity or different voltage ratings. #### 2. Time-Delay Functionality Unlike "fast-acting" fuses, the FNQ-R-6 is designed to tolerate temporary surges. This is critical for circuits involving inductive loads (like small motors or transformers) that draw a high "inrush" current when first powered on. The fuse will ignore these brief spikes but will blow if a sustained overload or short circuit occurs. #### 3. High Interrupting Rating With a **200kA AIC** (Ampere Interrupting Capacity), this fuse can safely stop extremely high levels of fault current without exploding or arcing over, making it suitable for heavy industrial power distribution. --- ### Common Applications * **Control Transformers:** Specifically designed to handle the high inrush currents of industrial control transformers. * **Motor Branch Circuits:** Used for protecting small motor circuits where "Type 2" coordination is required. * **Solenoids:** Protects inductive coils used in pneumatic or hydraulic valves. * **General Purpose:** Any 600V or lower circuit requiring space-saving, high-capacity protection. --- ### Dimensional Data The FNQ-R-6 follows the standard Class CC physical dimensions: * **Diameter:** 13/32 inch (10.3 mm) * **Length:** 1-1/2 inches (38.1 mm)