The **3216FF15-R** is a specific surface-mount technology (SMT) fuse manufactured by Eaton (formerly Bussmann). It is part of the **3216FF series**, widely used for overcurrent protection in compact electronic devices. --- ### 1. Technical Specifications The part number follows a specific nomenclature that defines its electrical and physical characteristics: | Feature | Specification | | :--- | :--- | | **Series** | 3216FF (Fast-acting Chip Fuse) | | **Package Size** | 3216 (Metric) / 1206 (Imperial) | | **Current Rating** | 15 Amperes | | **Voltage Rating (DC)** | 32 Vdc | | **Voltage Rating (AC)** | 32 Vac | | **Interrupting Rating** | 150A at 32 Vdc / 50A at 32 Vac | | **Operating Temp** | -55°C to +125°C | | **RoHS Compliant** | Yes (indicated by the "-R" suffix) | --- ### 2. Physical Dimensions (3216/1206) The "3216" designation refers to the length and width in millimeters. * **Length:** 3.2 mm (0.126") * **Width:** 1.6 mm (0.063") * **Height:** ~0.8 mm (0.031") --- ### 3. Key Characteristics * **Fast-Acting (FF):** The "FF" stands for Very Fast-Acting. This means the fuse is designed to open almost instantly when an overcurrent condition occurs, protecting sensitive downstream components like ICs or FETs. * **Thick Film Technology:** These fuses are typically constructed using a thick film metal element on a ceramic substrate, ensuring high stability and reliability. * **Low Resistance:** Designed with very low internal resistance to minimize voltage drop across the component during normal operation. --- ### 4. Common Applications Due to its high current rating (15A) and small 1206 footprint, the 3216FF15-R is commonly found in: 1. **Laptops and Tablets:** Protecting battery charging circuits and main power rails. 2. **LCD/LED Monitors:** Backlight inverter protection. 3. **Digital Cameras:** Power management systems. 4. **Network Hardware:** Protection for line cards and wireless base stations. 5. **Storage Devices:** SSDs and high-speed external drives. --- ### 5. Part Number Breakdown `3216` + `FF` + `15` + `-R` * **3216:** Package Size (1206 Imperial). * **FF:** Fast-Acting characteristic. * **15:** Amperage rating (15 Amps). * **-R:** Lead-free/RoHS compliant.