The **TDC11-2-R** is a high-performance, fast-acting subminiature fuse designed by Eaton (Bussmann Series). It is primarily used for overcurrent protection in telecommunications equipment, power supplies, and industrial electronics where space is limited. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Current Rating** | 2 Amperes | | **Voltage Rating** | 250 VAC | | **Response Characteristic** | Fast-Acting (Quick Acting) | | **Material** | Ceramic Tube with Nickel-plated Brass Endcaps | | **Form Factor** | Subminiature (approx. 5mm x 20mm or similar series) | | **RoHS Compliant** | Yes (indicated by the "-R" suffix) | --- ### 2. Breakdown of the Model Name Understanding the nomenclature helps in identifying the specific electronic properties: * **TDC11**: Refers to the series designator, typically indicating a specific physical dimension and fast-acting performance curve. * **-2**: Represents the **Ampere Rating**. In this case, it is rated for a continuous current of 2 Amps. * **-R**: Indicates **RoHS compliance**, meaning the part is manufactured without lead or other hazardous substances. --- ### 3. Electronic Characteristics & Functionality #### A. Fast-Acting Mechanism Unlike "Time-Delay" or "Slow-Blow" fuses, the TDC11-2-R is designed to open almost instantly when the current exceeds its 2A rating. This protects sensitive semiconductor components (like ICs or transistors) that cannot withstand even brief surges. #### B. Breaking Capacity (Interrupt Rating) This part is designed to safely interrupt a specific level of short-circuit current without physically shattering. Being a ceramic tube fuse, it generally offers a higher breaking capacity than glass equivalents because the ceramic can withstand higher internal pressures and temperatures. #### C. Voltage Drop and Resistance As a 2A fuse, it has a low internal resistance to minimize power loss (voltage drop) during normal operation, ensuring that the circuit receives the intended voltage. --- ### 4. Common Applications * **Power Supplies:** Protecting the input or output stages of AC/DC converters. * **Telecom Equipment:** Guarding line cards and networking hardware. * **Control Circuits:** Used in industrial PLCs or sensitive sensor arrays. ---