SMBJ40A

Overview of SMBJ40A

The SMBJ40A is a transient voltage suppressor (TVS) diode optimized for high-speed and low-voltage operations. It provides excellent performance for protecting sensitive electronic components from voltage spikes, electromagnetic interference (EMI), and radio-frequency interference (RFI). The SMBJ40A is designed to absorb and divert surge energy, ensuring the reliable operation of your circuit.

Pinout

The SMBJ40A pinout refers to the configuration and function of each pin in its surface-mountable (SMB) package. This package typically includes a diagram showing the layout of the pins when viewed from the top down with pins named sequentially. Each pin on the SMBJ40A has a specific role such as power supply input, ground connection, or signal interface.

Features

• Excellent Clamping Capability: The SMBJ40A provides excellent clamping capability to protect sensitive components from voltage spikes and surges.
• Low Incremental Surge Resistance: This feature ensures that the device can handle high surge currents without significant voltage drops.
• Typical Iless than 1µA above 12V: The SMBJ40A has a low leakage current, making it suitable for applications where power consumption is critical.
• For Surface-Mounted Applications to Optimize Board Space: The SMB package is designed to minimize board space requirements, making it ideal for modern electronic designs.
• Low Profile Package: The SMBJ40A has a low profile package that can be easily mounted on printed circuit boards (PCBs).
• Typical Failure Mode is Short from Over-Specified Voltage or Current: This feature ensures that the device will fail in a predictable manner, making it easier to design-in and test.
• Whisker Test Conducted Based on JEDEC JESD201A per its Table 4a and 4c: The SMBJ40A has undergone whisker testing to ensure that it meets the required standards for reliability and performance.
• IEC-61000-4-2 ESD 15kV(Air), 8kV (Contact): This device provides excellent electrostatic discharge (ESD) protection, ensuring reliable operation in harsh environments.

Applications

• Protection of Sensitive Electronic Components: The SMBJ40A is designed to protect sensitive electronic components from voltage spikes and surges.
• EMI/RFI Filtering: This device can be used as an EMI/RFI filter to ensure reliable operation in noisy environments.
• Surge Protection: The SMBJ40A provides surge protection for sensitive components, ensuring reliable operation during power surges and spikes.

Equivalents

For similar functionalities, consider these alternatives to the SMBJ40A:

• SMBJ30A: This device provides similar surge protection and clamping capabilities as the SMBJ40A but with a lower voltage rating.
• SMBJ50A: This device provides higher surge current handling and voltage ratings than the SMBJ40A, making it suitable for more demanding applications.

Frequently Asked Questions

Q: What is the typical failure mode of the SMBJ40A?
A: The typical failure mode of the SMBJ40A is a short from over-specified voltage or current.

Q: Does the SMBJ40A provide EMI/RFI filtering?
A: Yes, the SMBJ40A can be used as an EMI/RFI filter to ensure reliable operation in noisy environments.

Q: Is the SMBJ40A suitable for high-power applications?
A: No, the SMBJ40A is designed for low-power applications and may not be suitable for high-power applications that require higher surge currents.

Q: What is the typical leakage current of the SMBJ40A above 12V?
A: The typical leakage current of the SMBJ40A above 12V is less than 1µA.