The **KTN-R-110** is a specific type of industrial power fuse belonging to the **Class RK1** family. It is manufactured by companies like Bussmann (Eaton) and is designed for high-performance circuit protection. ### 1. Technical Specifications The following table summarizes the key electrical and physical characteristics of the KTN-R-110: | Feature | Specification | | :--- | :--- | | **Current Rating** | 110 Amperes | | **Voltage Rating** | 250 VAC (Volts Alternating Current) | | **Interrupting Rating** | 200,000 Amps RMS Symmetrical | | **Fuse Class** | Class RK1 | | **Speed/Characteristic** | Fast-Acting | | **Body Material** | Melamine or Fiber tube with metal end caps | | **Mounting Style** | Blade / Knife Blade | --- ### 2. Key Component Features #### A. Fast-Acting Response Unlike "Time-Delay" fuses (which allow for temporary motor surges), the KTN-R-110 is **fast-acting**. It is designed to open almost instantly when it detects an overcurrent. This makes it ideal for protecting sensitive electronic equipment and resistive loads where a delay could result in component damage. #### B. Current Limitation (RK1 Designation) The "R" in the part number indicates it is a **Rejection** style fuse. * **High Limitation:** Because it is an RK1 fuse, it provides superior current limitation compared to RK5 fuses. * **Rejection Feature:** The physical shape includes a notch in one of the blades. This prevents lower-rated fuses (like Class H or K) from being installed in a dedicated Class R fuse block, ensuring the safety integrity of the system is maintained. #### C. High Interrupting Capacity With a rating of **200kA**, this fuse can safely stop a massive short-circuit current without exploding or arching over, which is critical for industrial power distribution panels. --- ### 3. Common Applications Due to its fast response and high amperage, the KTN-R-110 is typically used in: * **Power Distribution Centers:** Protecting main branch circuits. * **Resistive Loads:** Electric heating elements and lighting systems. * **Semiconductor Protection:** Often used as a primary defense for power supplies and rectifiers. * **Non-Inductive Loads:** Any circuit that does not have a high "in-rush" current (like a large motor start-up). --- ### 4. Comparison: KTN-R vs. FRN-R | Feature | KTN-R (Fast-Acting) | FRN-R (Time-Delay) | | :--- | :--- | :--- | | **Reaction to Surge** | Opens immediately | Withstands temporary surge | | **Best For** | Electronics/Heating | Motors/Transformers | | **Class** | RK1 | RK5 |