The 1N749A is a highly reliable Zener diode manufactured by ON Semiconductor, a leading provider of semiconductor-based solutions. This particular component is designed to offer excellent voltage regulation, making it an ideal choice for a variety of applications where precise voltage control is required.

Key Features

• Nominal Zener Voltage: 4.3V, providing a stable reference voltage for voltage regulation circuits.
• Power Dissipation: With a power dissipation of 500mW, the 1N749A can handle moderate levels of power, making it suitable for a range of electronic applications.
• Test Current: The Zener test current (I<sub>ZT) is specified at 9.1mA, ensuring that the device operates at its nominal Zener voltage under standard test conditions.
• Tolerance: The voltage tolerance is ±5%, which allows for precise voltage regulation in circuits where this level of accuracy is sufficient.
• Package: The diode is housed in a DO-35 glass package, which provides a compact form factor and robust protection for the internal semiconductor.
• Operating Temperature: It can operate over a wide temperature range from -65°C to +175°C, making it suitable for harsh environments.

Applications

The 1N749A Zener diode is commonly used in a variety of applications, including:

• Voltage regulation circuits
• Surge suppression devices
• Switching power supplies
• Other electronic circuits requiring a stable voltage reference

Quality and Reliability

ON Semiconductor is known for their commitment to quality, and the 1N749A is no exception. Each diode is subjected to rigorous testing and quality control measures to ensure reliable performance in the field. The component's design and manufacturing processes are optimized to provide long-term stability and durability, making it a trusted choice for industrial, commercial, and consumer applications.