The **KTS-R-20** is a specific model of high-performance industrial fuse. It belongs to the **Limitron™** series manufactured by Bussmann (now part of Eaton). Below is a detailed breakdown of its electronic specifications and characteristics. --- ### 1. Technical Specifications The KTS-R-20 is a Class RK1 fuse, which means it offers a high degree of current limitation and safety for sensitive electronic circuits. | Feature | Specification | | :--- | :--- | | **Model Number** | KTS-R-20 | | **Current Rating** | 20 Amperes | | **Voltage Rating (AC)** | 600 Vac | | **Interrupting Rating** | 200,000 Amps RMS Symmetrical | | **Fuse Class** | Class RK1 | | **Response Characteristic** | Fast-Acting | | **Material** | Melamine tube with silver-plated brass end caps | --- ### 2. Key Electronic Characteristics * **Fast-Acting Response:** Unlike "Time-Delay" fuses (which allow for temporary surges like motor startups), the KTS-R-20 is designed to open very quickly when it detects an overcurrent. This is critical for protecting sensitive semiconductor components. * **Current Limitation:** It is a "Current Limiting" fuse. In the event of a short circuit, it reacts so quickly that it prevents the fault current from reaching its maximum peak, significantly reducing the potential for "Arc Flash" or thermal damage to downstream components. * **High Interrupting Capacity:** It can safely handle up to 200,000 amps of fault current. This makes it suitable for use in industrial service entrances or heavy-duty control panels where massive energy spikes could occur. --- ### 3. Physical Construction The part is physically designed to ensure safety and prevent incorrect installation: 1. **Rejection Feature:** The "R" in KTS-R indicates it has a rejection notch. This prevents the installation of lower-rated fuses (like Class H) into the same fuse holder, ensuring the circuit remains protected at the specified RK1 safety level. 2. **Dimensions:** Typically measures approximately **5 inches in length** and **0.81 inches in diameter**, fitting standard 600V, 30A fuse clips (though rated for 20A). --- ### 4. Common Applications Due to its fast-acting nature and high voltage rating, the KTS-R-20 is primarily used in: * **Branch Circuit Protection:** Standard industrial power distribution. * **Non-Inductive Loads:** Resistance heaters and lighting circuits where no high-inrush startup current exists. * **Semiconductor Protection:** Protecting rectifiers or SCRs (Silicon Controlled Rectifiers) that require immediate disconnection during a fault.