The **FNQ-R-3-2/10** is a specific model of industrial fuse manufactured by **Eaton (Bussmann Series)**. It belongs to the **Limitron™** family and is designed for high-performance circuit protection. --- ## 1. Technical Specifications The part number "3-2/10" translates to a current rating of **3.2 Amperes**. Below are the core electronic characteristics: | Feature | Specification | | :--- | :--- | | **Current Rating** | 3.2 Amps | | **Voltage Rating (AC)** | 600 Vac | | **Interrupt Rating** | 200 kA (at 600 Vac) | | **Fuse Class** | Class CC | | **Response Characteristic** | Time-Delay (Slow Blow) | | **Body Material** | Melamine Tube with Nickel-plated Brass Endcaps | | **Dimensions** | 13/32" x 1-1/2" (10.3 x 38.1 mm) | --- ## 2. Key Features and Design ### Class CC Rejection Feature The "R" in the suffix indicates this is a **Rejection-style** fuse. It features a specific physical rejection tip on one endcap. This ensures that it can only be inserted into Class CC fuse holders, preventing someone from accidentally replacing it with a lower-rated fuse (like a Midget fuse) that lacks the same interrupting capacity. ### Time-Delay Characteristic Unlike "Fast-Acting" fuses, the FNQ-R-3-2/10 is designed to handle **inrush currents**. This means it will not blow immediately when a motor starts or a transformer is energized, provided the current spike is temporary. ### High Interrupting Rating (200kA) This fuse can safely clear very high fault currents. This is critical for meeting **NEC® (National Electrical Code)** requirements for Short-Circuit Current Ratings (SCCR) in industrial control panels. --- ## 3. Typical Applications The FNQ-R-3-2/10 is primarily used in the following electronic and electrical environments: * **Control Transformers:** Protecting the primary side of small transformers where high inrush currents occur. * **Solenoids:** Protection against short circuits while allowing for the initial pull-in current. * **Inductive Loads:** Any circuit with coils or motors that requires "Time-Delay" protection. * **Branch Circuit Protection:** Used in specialized fuse blocks for industrial machinery. --- ## 4. Part Number Breakdown * **FNQ:** Bussmann Series Fiber Tube, Time-Delay fuse. * **R:** Rejection Feature (Class CC). * **3-2/10:** 3.2 Amp rating.