The **FRN-R-8/10** is a specific type of industrial-grade electrical fuse. It belongs to the **Fusetron™** series manufactured by Eaton’s Bussmann Division. This component is designed for high-performance protection in power circuits. ### 1. Technical Specifications Below are the primary electrical characteristics of the FRN-R-8/10: | Feature | Specification | | :--- | :--- | | **Model Number** | FRN-R-8/10 | | **Current Rating** | 0.8 Amps (8/10A) | | **Voltage Rating (AC)** | 250 VAC | | **Voltage Rating (DC)** | 125 VDC | | **Interrupting Rating** | 200,000A RMS Symmetrical (at 250VAC) | | **Fuse Class** | Class RK5 | | **Time Response** | Dual-Element, Time-Delay | --- ### 2. Key Component Features * **Dual-Element Design:** Unlike standard fuses, this has two distinct internal components. One handles short-circuit protection (instantaneous blow), while the other handles overloads (thermal element), allowing it to withstand temporary surges. * **Time-Delay:** This part is "slow-blow." It is designed to ignore "inrush currents" (brief spikes when motors or transformers start) but will still blow if a sustained overload occurs. * **Current Limiting:** As a Class RK5 fuse, it significantly limits the peak let-through current during a short circuit, protecting downstream components from mechanical stress and heat. * **Physical Form Factor:** It typically features a cylindrical body with "ferrule" ends (no blades), fitting into standard 250V fuse blocks or disconnect switches. --- ### 3. Common Applications Due to its low amperage and time-delay characteristics, the FRN-R-8/10 is typically used for: 1. **Small Motor Protection:** Protecting fractional horsepower motors where start-up current is higher than running current. 2. **Control Transformers:** Safeguarding the primary or secondary side of small industrial transformers. 3. **Solenoids:** Protecting electromagnetic coils in industrial automation. 4. **General Purpose Branch Circuits:** Where sensitive electronics require a high interrupting capacity (200kA) to prevent explosive failure during a dead short. --- ### 4. Part Number Breakdown * **FRN-R:** Indicates the Series (Fusetron, Class RK5, 250V). * **8/10:** Indicates the Ampere rating (0.8 Amps).