SMAJ33A-TR

The SMAJ33A-TR is a transient voltage suppressor (TVS) diode manufactured by STMicroelectronics, designed to protect sensitive electronic components from voltage spikes and transients. Here’s a detailed description of its features and specifications:

General Overview:

• Type: Unidirectional TVS Diode
• Package: Typically available in a DO-214AA (SMB) package, which is a surface-mount device (SMD) that allows for easy integration into various circuit designs.

Electrical Characteristics:

• Reverse Stand-Off Voltage (V_RWM): The SMAJ33A-TR has a reverse stand-off voltage of 33V, meaning it can withstand this voltage without conducting.
• Clamping Voltage (V_C): When subjected to a transient voltage, the clamping voltage is typically around 50V, which is the maximum voltage the diode will allow to pass through during a surge event.
• Peak Power Dissipation: The device can handle peak power dissipation of up to 600W for a duration of 8/20 µs, making it suitable for protecting against high-energy transients.
• Capacitance: The diode exhibits low capacitance, typically around 100pF at 0V, which helps maintain signal integrity in high-speed applications.

Performance Features:

• Response Time: The SMAJ33A-TR has a fast response time, which is crucial for protecting sensitive components from fast transients.
• Temperature Range: It operates effectively over a wide temperature range, typically from -55°C to +150°C, making it suitable for various environmental conditions.
• Low Leakage Current: The device features low leakage current, ensuring minimal power loss during normal operation.

Applications:

The SMAJ33A-TR is commonly used in:

• Telecommunications: Protecting data lines and communication equipment from voltage spikes.
• Consumer Electronics: Safeguarding devices like smartphones, tablets, and laptops from electrical surges.
• Industrial Equipment: Providing protection for control circuits and automation systems.
• Automotive Applications: Shielding sensitive electronic components in vehicles from transients caused by load dumps or other electrical disturbances.

Compliance and Standards:

• The SMAJ33A-TR is compliant with various industry standards, ensuring reliability and performance in critical applications. It is often RoHS compliant, indicating that it is free from hazardous substances.

Conclusion:

The SMAJ33A-TR from STMicroelectronics is a robust and reliable transient voltage suppressor diode, ideal for protecting sensitive electronic components from voltage spikes and transients. Its combination of high power handling capability, low capacitance, and wide operating temperature range makes it a versatile choice for a variety of applications in consumer electronics, telecommunications, industrial, and automotive sectors.