Based on technical specifications for industrial electronic components, the part number **3AG3AP4-R** typically refers to a **High-Interrupting Capacity Glass Tube Fuse** (commonly part of the 3AG/AGC series). The "R" suffix generally denotes **RoHS compliance** (Restriction of Hazardous Substances). --- ### 1. Technical Specifications Below are the typical electrical and physical characteristics associated with this component: | Characteristic | Specification | | :--- | :--- | | **Part Series** | 3AG (Industry standard 1/4" x 1-1/4") | | **Body Material** | Glass | | **Fuse Type** | Fast-Acting / Fast-Blow | | **Current Rating** | Typically 3 Amperes (based on "3A" prefix) | | **Voltage Rating** | 250V AC | | **Interrupting Rating** | 100A @ 250V AC / 10,000A @ 125V AC | | **Mounting Type** | Holder / Clip / Plug-in | | **Compliance** | RoHS (Lead-free) | --- ### 2. Breakdown of the Part Number * **3AG**: Refers to the physical size. These are standard glass fuses measuring **6.3mm x 32mm** (1/4 inch by 1-1/4 inch). * **3A**: Indicates the **Current Rating** of 3 Amps. * **P**: Often indicates a specific packaging type (e.g., Lead-free Plating or Bulk Pack). * **4**: Can refer to internal design variations or manufacturing codes. * **-R**: Explicitly confirms the part is **RoHS compliant** (Environmentally friendly/Lead-free). --- ### 3. Key Features & Applications #### Features: * **Visibility**: The glass body allows for easy visual inspection to determine if the internal filament has melted (blown). * **Fast Response**: Designed to open quickly under overload or short-circuit conditions to protect sensitive electronic circuits. * **Standardized Fit**: Compatible with a wide range of fuse blocks and panel-mount fuse holders. #### Common Applications: 1. **Consumer Electronics**: Power supplies, monitors, and audio equipment. 2. **Industrial Equipment**: Control panels and small motors. 3. **Automotive**: Older vehicle accessory circuits. --- ### 4. Safety Considerations > [!CAUTION] > **Never replace a fuse with one of a higher Ampere rating.** Using a 5A fuse where a 3A fuse (like the 3AG3AP4-R) is required can lead to permanent equipment damage or fire hazards. ---