The UDZTE-173.9B is a Zener diode manufactured by Rohm Semiconductor, designed for voltage regulation and transient voltage suppression in a variety of electronic circuits. It's part of Rohm's UDZ series, known for its compact size and reliable performance in surface-mount applications.

Applications:

• Voltage regulation in portable devices: Smartphones, tablets, and other battery-powered devices.
• Transient voltage suppression: Protecting sensitive components from voltage spikes in power supplies.
• Overvoltage protection: Preventing damage to circuits in automotive electronics.
• Clipping circuits: Shaping waveforms in signal processing applications.
• Level shifting: Adjusting voltage levels in digital circuits.

Features:

• Zener Voltage: 3.9V, providing a stable voltage reference point.
• Low Leakage Current: Minimizes power consumption in standby mode.
• Small Mold Type: Allows for high-density mounting on printed circuit boards (PCBs).
• High Surge Current Capability: Offers robust protection against transient voltage events.
• Pb-free (RoHS compliant): Meets environmental standards for lead-free manufacturing.

Benefits:

• Precise Voltage Regulation: Ensures stable operation of sensitive electronic circuits.
• Effective Transient Suppression: Protects components from damage due to voltage spikes.
• Reduced Board Space: Enables smaller and more compact designs.
• Long-Term Reliability: Provides consistent performance over a wide range of operating conditions.
• Environmentally Friendly: Complies with RoHS standards, reducing environmental impact.

Additional Details:

The UDZTE-173.9B Zener diode comes in a small mold type package, making it suitable for automated assembly processes. Its low leakage current is crucial for battery-operated devices where power conservation is essential. The device's ability to handle high surge currents ensures that it can effectively protect downstream circuitry from damaging voltage transients. It is commonly used in consumer electronics, industrial equipment, and automotive applications where reliable voltage regulation and overvoltage protection are required. Specific electrical characteristics can be found in the Rohm Semiconductor datasheet for this part number.