The **LCE-56-R** refers to a specific electronic component, most commonly identified as a **Transient Voltage Suppressor (TVS) Diode**. Specifically, it belongs to the Littelfuse LCE series, designed to protect sensitive electronic equipment from voltage transients induced by lightning and other transient voltage events. --- ### 1. Key Technical Specifications Below are the primary electrical characteristics for the LCE-56-R: | Parameter | Value / Description | | :--- | :--- | | **Reverse Stand-Off Voltage ($V_R$)** | 56 Volts | | **Breakdown Voltage ($V_{BR}$)** | 62.2V (Min) to 69.0V (Max) | | **Peak Pulse Power ($P_{PP}$)** | 1500 Watts (at 10/1000μs waveform) | | **Clamping Voltage ($V_C$)** | 91.4 Volts | | **Directionality** | Unidirectional | | **Package Type** | DO-201 (Axial Leaded) | --- ### 2. Functional Components and Operation The "parts" or internal mechanisms of the LCE-56-R include: * **P-N Junction:** A large-area silicon junction designed to handle high surge currents without melting. * **Passivated Junction Technology:** The silicon chip is glass-passivated to ensure long-term stability and low leakage current. * **Lead Frame:** High-conductivity oxygen-free copper leads for efficient heat dissipation during a surge event. * **Encapsulation:** Molded plastic case (UL 94V-0 rated) that provides insulation and structural integrity. --- ### 3. Applications The LCE-56-R is typically used in circuits where high-speed response to overvoltage is critical: 1. **Telecommunications:** Protection of exchange lines and subscriber equipment. 2. **Industrial Controls:** Protecting PLCs and sensor interfaces from inductive load switching. 3. **Power Supplies:** Clamping spikes on DC bus lines. --- ### 4. Part Number Breakdown Understanding the nomenclature helps in identifying the specific variant: | Prefix | Number | Suffix | | :--- | :--- | :--- | | **LCE** | **56** | **-R** | | Series Name (Low Capacitance) | Stand-off Voltage (56V) | Tape and Reel Packaging | ---