SMAJ33A

The SMAJ33A 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:

1. Voltage Rating: The SMAJ33A has a breakdown voltage of approximately 33 volts, making it suitable for applications that require clamping at this voltage level. This allows it to effectively protect circuits operating at lower voltages.

2. Power Dissipation: The device is capable of handling a peak power dissipation of around 400 watts for a short duration, which is crucial for absorbing high-energy transients without failing.

3. Package Type: The SMAJ33A is housed in a DO-214AA (SMA) package, which is a surface-mount device (SMD) configuration. This package is compact, allowing for easy integration into various circuit designs while minimizing board space.

4. Clamping Voltage: The clamping voltage is typically around 50 volts at a specified peak pulse current, ensuring that the voltage across the protected device does not exceed safe levels during transient events.

5. Response Time: The SMAJ33A features a fast response time, which is essential for protecting sensitive components from rapid voltage spikes.

6. Temperature Range: The operating temperature range for the SMAJ33A is typically from -55°C to +150°C, making it suitable for a wide variety of environments, including automotive and industrial applications.

7. Applications: This TVS diode is commonly used in applications such as telecommunications, automotive electronics, consumer electronics, and industrial equipment, where protection from voltage transients is critical.

8. RoHS Compliance: The SMAJ33A is compliant with RoHS (Restriction of Hazardous Substances) regulations, ensuring that it is environmentally friendly and safe for use in electronic devices.

Electrical Characteristics:

• Reverse Stand-off Voltage (V_R): 33V
• Breakdown Voltage (V_BR): 36.7V (min), 40.3V (max)
• Clamping Voltage (V_C): 50V (at 5A)
• Peak Pulse Power (P_PP): 400W (for 10/1000μs waveform)
• Capacitance (C): Typically around 100pF at 1MHz, which indicates minimal impact on signal integrity in high-frequency applications.

Conclusion:

The SMAJ33A 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, fast response time, and compact packaging makes it an ideal choice for a wide range of applications where circuit integrity is paramount.