1SMA5918BT3G

The 1SMA5918BT3G is a Zener diode manufactured by ON Semiconductor, designed for voltage regulation and protection applications. This component is part of the SMA series of Zener diodes, which are known for their reliability and efficiency in various electronic circuits.

Key Features:

1. Zener Voltage: The 1SMA5918BT3G has a Zener voltage of 18V, which means it can maintain a stable voltage of 18 volts across its terminals when reverse-biased and operating in the breakdown region.

2. Power Dissipation: This diode can handle a maximum power dissipation of 1 watt, making it suitable for applications where moderate power levels are involved.

3. Package Type: The diode is housed in a DO-214AC (SMA) package, which is a surface-mount device (SMD) that provides a compact footprint, allowing for efficient use of space on printed circuit boards (PCBs).

4. Temperature Range: The operating temperature range for the 1SMA5918BT3G is typically from -55°C to +150°C, making it suitable for use in a wide variety of environments, including automotive and industrial applications.

5. Reverse Leakage Current: The reverse leakage current is specified at a certain temperature and voltage, which is an important parameter for understanding the diode's performance in real-world applications.

6. Applications: This Zener diode is commonly used in voltage regulation, transient voltage suppression, and as a reference voltage in various electronic circuits. It is ideal for protecting sensitive components from voltage spikes and ensuring stable operation in power supply circuits.

7. Marking: The diode is typically marked with its part number for easy identification on PCBs.

Electrical Characteristics:

• Zener Impedance: The dynamic impedance of the diode is specified, which indicates how much the voltage changes with respect to changes in current. This is crucial for applications requiring precise voltage regulation.
• Capacitance: The diode may also have specified capacitance values, which can affect high-frequency performance in certain applications.

Conclusion:

The 1SMA5918BT3G from ON Semiconductor is a versatile and reliable Zener diode suitable for a range of electronic applications. Its combination of a stable Zener voltage, compact packaging, and wide operating temperature range makes it an excellent choice for engineers looking to implement voltage regulation and protection in their designs.