SMAJ12CA

The SMAJ12CA is a specific type of transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. It is designed to protect sensitive electronic components from voltage spikes and transients, which can occur due to various factors such as electrostatic discharge (ESD), lightning strikes, or inductive load switching.

Key Features and Specifications:

1. Type and Configuration:

   • The SMAJ12CA is a unidirectional TVS diode, meaning it is designed to clamp voltage in one direction, providing protection for circuits that are sensitive to reverse polarity.

2. Peak Power Rating:

   • It has a peak power rating of 400 watts, which indicates its ability to absorb high-energy transients without failing.

3. Reverse Stand-Off Voltage (V_RWM):

   • The device has a reverse stand-off voltage of 12 volts. This is the maximum voltage that can be applied to the diode without causing it to conduct.

4. Clamping Voltage (V_C):

   • When a transient occurs, the clamping voltage is the maximum voltage that the diode will allow to pass through. For the SMAJ12CA, this is typically around 20.5 volts at a specified peak pulse current.

5. Peak Pulse Current (I_PP):

   • The diode can handle a peak pulse current of up to 30 amperes, which is crucial for protecting circuits from high-energy transients.

6. Capacitance:

   • The SMAJ12CA has a low capacitance, which helps maintain signal integrity in high-speed applications, making it suitable for data lines and communication circuits.

7. Package Type:

   • It is housed in a DO-214AA (SMA) package, which is a surface-mountable, cylindrical package that is compact and suitable for various PCB layouts.

8. Operating Temperature Range:

   • The device operates effectively over a wide temperature range, typically from -55°C to +150°C, making it suitable for use in harsh environments.

9. Applications:

   • The SMAJ12CA is commonly used in automotive electronics, telecommunications, consumer electronics, and industrial applications where overvoltage protection is critical.

10. Compliance and Standards:

    • The device meets various industry standards for safety and reliability, ensuring it can be used in a wide range of applications without compromising performance.

Summary:

The SMAJ12CA from Littelfuse Inc. is a robust and reliable transient voltage suppressor diode that provides essential protection for electronic circuits against voltage spikes. Its combination of high power handling, low clamping voltage, and compact packaging makes it an ideal choice for a variety of applications where overvoltage protection is necessary.