The Littelfuse SMBJ45CA is a unidirectional TVS diode with a peak pulse power rating of 600W. It is designed to protect electronic circuits from transient voltage occurrences such as electrostatic discharge (ESD), electrical fast transients (EFT), and lightning-induced surges. This device is encapsulated in a low-profile DO-214AA package, making it suitable for surface-mount applications.
High Power Dissipation: The SMBJ45CA can dissipate peak pulse power of 600W, providing robust protection against high-energy transients.
Low Clamping Voltage: With a clamping voltage of 72.7V, it ensures minimal stress on the protected components during transient events.
Fast Response Time: The diode responds in less than 1 pico-second, ensuring immediate protection upon detecting a voltage spike.
Surface Mount Package: The DO-214AA package is ideal for automated assembly processes, enhancing production efficiency.
Reliable Performance: Compliance with IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT) standards ensures reliable performance in demanding environments.
The primary function of the SMBJ45CA is to safeguard electronic circuits from transient voltages. Its performance is characterized by a standoff voltage of 45V, a breakdown voltage of 50V to 55.3V, and a clamping voltage of 72.7V. The device operates at -55°C to 150°C, ensuring stability across a wide temperature range. Its low leakage current of 5µA at 45V enhances the overall energy efficiency of the protected circuit.
The SMBJ45CA is versatile and can be employed in various applications, including:
Telecommunications equipment, where it protects against surges induced by lightning strikes or switching transients.
Industrial controls, where it ensures the reliability of sensitive control systems exposed to harsh electrical environments.
Consumer electronics, providing robust protection for portable devices and gaming consoles.
Automotive electronics, safeguarding critical components in vehicles from transient voltage spikes.
When implementing the SMBJ45CA in a circuit, consider the following guidelines:
Placement: Place the TVS diode as close as possible to the component or circuit you are protecting to ensure effective suppression of transients.
Soldering: Use standard reflow soldering techniques suitable for the DO-214AA package to mount the device onto PCBs.
Thermal Management: Ensure adequate heat dissipation around the diode to maintain its performance and longevity, especially in high-power applications.
Compliance: Verify that the TVS diode meets all relevant compliance standards for your specific application to ensure optimal protection and reliability.
The Littelfuse SMBJ45CA TVS diode is a highly reliable solution for protecting electronic circuits from transient voltage events. Its robust design, high power dissipation capability, and compliance with industry standards make it ideal for various applications, including telecommunications, industrial controls, consumer electronics, and automotive systems. By following proper usage guidelines, engineers can maximize the protective benefits of this essential component.
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