## Understanding the KTK-R-8 Electronic Component The **KTK-R-8** is a specialized industrial fuse part of the **Limitron™** series manufactured by Eaton’s Bussmann Division. It is specifically designed as a fast-acting, rejection-type fuse used for overcurrent protection in sensitive circuits. --- ### 1. Technical Specifications | Feature | Specification | | :--- | :--- | | **Product Type** | Supplemental Fuse / Branch Circuit Protection | | **Amperage Rating** | 8 Amps | | **Voltage Rating (AC)** | 600 Vac | | **Interrupting Rating** | 200,000 Amps (200 kA) | | **Fuse Class** | Class CC | | **Response Time** | Fast-Acting | | **Dimensions** | 13/32" x 1-1/2" (Standard Midget size) | | **Material** | Melamine tube with nickel-plated brass endcaps | --- ### 2. Key Features and Design * **Fast-Acting Performance:** The KTK-R-8 is designed to open quickly when it detects a short circuit or overload. This provides a high degree of current limitation to protect downstream components. * **Rejection Tip:** As a **Class CC** fuse, it features a physical "rejection" tip on one of the endcaps. This prevents the installation of a lower-rated fuse (like a standard midget fuse) into a Class CC fuse holder, ensuring the safety integrity of the circuit. * **High Interrupt Rating:** With a 200kA rating, it can safely handle massive surges without exploding or failing to clear the fault, which is critical for industrial power distribution. --- ### 3. Common Applications The KTK-R-8 is typically found in the following environments: 1. **Control Circuits:** Protecting sensitive electrical control logic. 2. **Lighting Circuits:** Used in high-voltage industrial lighting ballast protection. 3. **Meter Circuits:** Protecting electrical measuring instruments. 4. **General Branch Circuit Protection:** Small motor loads and specialized machinery. --- ### 4. Cross-Reference & Equivalents If the KTK-R-8 is unavailable, the following parts are generally considered equivalent in specifications: * **Littlefuse:** KLDR series (though KLDR is often time-delay, check for KLK series for fast-acting). * **Mersen (Ferraz Shawmut):** ATMR8.