The part number **VDZ7.5B** (often associated with ROHM Semiconductor or similar manufacturers) refers to a **Zener Diode**. These components are specifically designed to allow current to flow in reverse when a specific threshold voltage is reached. ### 1. Technical Specifications The VDZ series is known for its ultra-small surface-mount packaging, making it ideal for high-density circuit designs. | Parameter | Specification | | :--- | :--- | | **Zener Voltage ($V_z$)** | 7.5V (Nominal) | | **Voltage Range** | 7.28V to 7.72V | | **Power Dissipation ($P_d$)** | 100mW | | **Package Type** | VMN2 (SOD-923 equivalent) | | **Configuration** | Single Diode | | **Operating Temperature** | -55°C to +150°C | --- ### 2. Key Features * **Ultra-Small Package:** The VMN2 footprint is extremely compact, saving significant PCB real estate. * **High Reliability:** Designed for stable performance over a wide temperature range. * **Silicon Epitaxial Planar Structure:** Ensures precise voltage regulation and low leakage current. * **Lead-Free / RoHS Compliant:** Meets modern environmental standards for electronics manufacturing. --- ### 3. Common Applications Zener diodes like the VDZ7.5B are primarily used for voltage management tasks: * **Voltage Regulation:** Maintaining a fixed 7.5V output despite fluctuations in input voltage or load current. * **Surge Protection:** Acting as a "clamp" to protect sensitive downstream components from voltage spikes that exceed 7.5V. * **Reference Voltage:** Providing a stable reference point for analog-to-digital converters (ADCs) or operational amplifiers. --- ### 4. Schematic Representation In a circuit diagram, the Zener diode is represented similarly to a standard diode but with "wings" on the cathode line: ```text (Anode) (Cathode) A ----|>|---- K | (Zener Symbol) ```