The **KWS-R-35** is a high-performance, current-limiting fuse manufactured by **Bussmann (Eaton)**. It is part of the "Limitron" series and is specifically engineered to provide extremely fast response times to protect sensitive electronic components. --- ### ## Technical Specifications The following table highlights the core electronic characteristics of the KWS-R-35: | Property | Value | | :--- | :--- | | **Current Rating** | 35 Amperes | | **Voltage Rating (AC)** | 600 Vac | | **Voltage Rating (DC)** | 600 Vdc | | **Interrupting Rating** | 200,000 Amps RMS Symmetrical | | **Class** | RK1 | | **Body Material** | Melamine (Fiberglass/Plastic) | | **Terminal Material** | Brass / Silver-plated Copper | --- ### ## Key Electronic Features #### 1. Fast-Acting Response Unlike "Time-Delay" fuses which can handle brief surges (like motor startups), the KWS-R-35 is **fast-acting**. This means it will blow almost instantly if the current exceeds 35A. This is critical for protecting semiconductor devices like SCRs, diodes, and thyristors. #### 2. High Current Limitation This fuse is designed to be "current-limiting." During a massive short circuit, the fuse clears the fault so quickly that it prevents the peak current from ever reaching its maximum potential. This protects downstream equipment from thermal and mechanical stress. #### 3. RK1 Classification The Class RK1 designation indicates a very high degree of current limitation. It is often used to replace older Class H or K fuses to provide superior protection for modern electronic circuits. --- ### ## Common Applications * **Variable Speed Drives (VSDs):** Protecting the internal power electronics. * **UPS Systems:** Ensuring battery banks and inverters are safe from short circuits. * **Rectifiers:** Guarding the conversion units from AC to DC. * **Industrial Control Panels:** Serving as the primary branch circuit protection where sensitive components are present. --- ### ## Physical Construction * **Dimensions:** It typically follows standard 600V Class R dimensions (approximately 5 inches in length and 0.81 inches in diameter). * **Rejection Feature:** It includes a rejection notch on the blade to ensure it cannot be replaced by a fuse with a lower interrupting rating, maintaining system safety.