The **KTS-R-275** is a high-performance industrial fuse manufactured by **Bussmann (Eaton)**. It belongs to the **Limitron™** family and is designed for high-speed response and superior current limitation. --- ### ## Technical Specifications The following table summarizes the key electrical characteristics of the KTS-R-275: | Feature | Specification | | :--- | :--- | | **Manufacturer** | Eaton (Bussmann Series) | | **Model Number** | KTS-R-275 | | **Current Rating** | 275 Amperes | | **Voltage Rating (AC)** | 600 Vac | | **Interrupting Rating** | 200,000 Amps RMS Symmetrical | | **Fuse Class** | Class RK1 | | **Body Material** | Melamine Glass Tube | | **Termination Style** | Blade / Bolt-on | --- ### ## Key Features and Functions 1. **Fast-Acting Protection:** Unlike "Time-Delay" fuses, the KTS-R series is fast-acting. It is designed to open almost instantly when a significant overcurrent or short-circuit occurs. 2. **Current Limitation:** As a Class RK1 fuse, it provides a high degree of current limitation. This significantly reduces the "let-through" energy, protecting sensitive downstream electronic components (like VFDs or SCRs) from thermal and magnetic damage. 3. **Physical Dimensions:** This fuse is physically larger than standard residential fuses. It uses a blade-style terminal to ensure a secure, low-resistance connection in industrial fuse blocks or disconnect switches. 4. **Rejection Feature:** The "R" in the suffix indicates it is a rejection-style fuse. When used with a matching R-series fuse holder, it prevents the installation of lower-rated Class H or K fuses, ensuring the safety integrity of the circuit. --- ### ## Typical Applications * **Feeder Branches:** Used in main distribution panels to protect sub-circuits. * **Non-Inductive Loads:** Ideal for resistive heating elements and lighting circuits where in-rush currents are minimal. * **Semiconductor Protection:** Often used to protect power electronic equipment where extremely fast clearing is required to prevent component "melt-down." * **Critical Infrastructure:** Used in systems where a 200kA interrupting rating is necessary to handle high potential fault currents. --- ### ## Comparison: RK1 vs. RK5 While both fit in similar holders, the KTS-R-275 (RK1) is superior to the FRN-R/FRS-R (RK5) series in specific ways: | Attribute | KTS-R (RK1) | FRS-R (RK5) | | :--- | :--- | :--- | | **Response Speed** | Fast-Acting | Time-Delay | | **Current Limitation** | Highest | Moderate | | **Ideal For** | Electronics/Sensitive parts | Motors/Transformers |