The **GMC-6.3-R** is a specific type of medium-acting (standard) glass body cartridge fuse. It is part of the GMC series commonly manufactured by brands like **Eaton (Bussmann)** and **Bel Fuse**. --- ### ## Technical Specifications Below are the primary electronic characteristics of the GMC-6.3-R: | Parameter | Specification | | :--- | :--- | | **Current Rating** | 6.3 Amperes (6.3A) | | **Voltage Rating** | 250V AC (Standard) | | **Fuse Type** | Medium Time-Delay (Slo-Blo / Time-Lag) | | **Dimensions** | 5mm x 20mm (Standard Small Cartridge) | | **Body Material** | Glass Tube | | **Termination Style** | Ferrule (End Caps) | | **RoHS Compliant** | Yes (Indicated by the "-R" suffix) | --- ### ### Key Electronic Features 1. **Medium Time-Delay:** Unlike "Fast-Acting" fuses, the GMC series is designed to withstand temporary surges or "inrush currents." This is crucial for devices with motors or capacitors that draw a spike of power when first turned on. 2. **Low Breaking Capacity:** As a glass fuse, it is generally rated for low breaking capacity. This means it is designed to protect against overloads in consumer electronics rather than high-power industrial short circuits. 3. **The "-R" Suffix:** In the electronic component world, the **-R** stands for **RoHS Compliance**. This indicates that the part is manufactured without lead, mercury, cadmium, or other hazardous substances, making it compliant with environmental regulations. --- ### ### Common Applications Due to its 6.3A rating and 5x20mm form factor, this part is frequently found in: * Power supplies for desktop computers. * Consumer appliances (Microwaves, Coffee makers). * Audio/Visual equipment (Amplifiers). * Testing and Measurement instruments. --- ### ### Safety and Replacement When replacing a GMC-6.3-R, ensure the replacement matches: * **Voltage:** Can be higher (e.g., 300V), but never lower than the original 250V. * **Amperage:** Must be exactly 6.3A. * **Speed:** Must be Time-Delay/Medium-Delay. Replacing a time-delay fuse with a fast-acting fuse will result in the fuse blowing immediately upon device startup.