### FRS-60-R Electronic Component Overview The **FRS-60-R** is a high-performance, **Dual-Element Time-Delay Class RK5 Fuse**. It belongs to the Fusetron™ series manufactured by Eaton (Bussmann Division). This component is designed for circuit protection against overcurrent and short-circuit events. --- ### Technical Specifications | Parameter | Specification | | :--- | :--- | | **Current Rating** | 60 Amperes | | **Voltage Rating (AC)** | 600 Vac | | **Voltage Rating (DC)** | 300 Vdc | | **Interrupting Rating (AC)** | 200,000 Amps RMS Symmetrical | | **Interrupting Rating (DC)** | 20,000 Amps | | **Fuse Class** | Class RK5 | | **Type** | Dual-Element, Time-Delay | | **Construction** | Fiberglass tube with brass end caps | --- ### Key Electronic Features #### 1. Dual-Element Design Unlike standard single-element fuses, the FRS-60-R contains two distinct components: * **Thermal Element:** Handles low-level overloads. It provides a "time-delay" which allows temporary surges (like motor startups) to pass without blowing the fuse. * **Instantaneous Element:** A notched copper link that reacts immediately to heavy short-circuit currents to prevent catastrophic equipment damage. #### 2. Time-Delay Characteristics This fuse is engineered to hold **500% of its rated current for a minimum of 10 seconds**. This is critical for inductive loads (motors and transformers) that require a high "inrush" current to start. #### 3. Current Limitation Although it is a Class RK5 fuse, it provides significant current limitation. In the event of a massive short circuit, the fuse acts fast enough to prevent the peak current from reaching its maximum potential, protecting downstream components. --- ### Applications The FRS-60-R is primarily used in the following electronic and electrical environments: * **Motor Control Centers:** Specifically for motor branch circuit protection. * **Transformers:** Protecting against primary overcurrent while tolerating magnetizing inrush. * **General Purpose Circuits:** Used in mains switches and distribution panels where high interrupting capacity is required. --- ### Wiring & Physical Compatibility The "R" suffix indicates that this fuse is compatible with **Rejection-type fuse clips**. This prevents the accidental installation of a lower-rated fuse (like a Class H) into a circuit that requires the high interrupting capacity of a Class RK5.