SMBJ12CAHE3/5B

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TVS – Diodes (Transient Voltage Suppressor) are electronic components whose function is to protect other circuits from high voltage, current and power surges and spikes. They achieve this by clamps the voltage, current or power levels at the designated limits.

The SMBJ12CAHE3/5B is a TVS Diode device in a 3 Pin LEADLESS package, designed to provide some protection to the circuit it serves. It provides ESD (electro-static discharge) protection over the entire common mode working range of the device. The SMBJ12CAHE3/5B is designed for high speed, low capacitance, and low clamping voltage applications.

The SMBJ12CAHE3/5B is suitable for the electronics applications as Automotive, Telecommunications, Computers, and other applications where transients and ESD must be clamped to have correct operation in the circuit. The main application field of the SMBJ12CAHE3/5B is protection of the low power circuits from transients and ESD and for other low power line protection.

The working principle of the SMBJ12CAHE3/5B TVS device is its internal structure. This consists of a PN junction which breaks down when exposed to high voltages. Whenever a transient spike or lightning surge voltage is applied across the PN junction, this decreases the breakdown voltage of the device and it conducts current from the transient through the diode. This conducts the transient spike safely away into a “sink” which is usually ground.

The SMBJ12CAHE3/5B allows current up to 12A in an operating range between 5V and 1500W. It has a peak pulse power dissipation rate of 1500W and a working voltage of 12V. It offers a steady state electrical rating of 1.5A and a peak essential rating of 2A. Its ESD clamping voltage level is around 14.6V, making it suitable for ESD protection.

The SMBJ12CAHE3/5B has very good response characteristics for fast transient pulses, with a typical peak pulse current rating of up to 12A and a maximum clamping voltage below 7V. It also has wide operating temperature range and does not require a minimum operating current for required protection. It’s response time is typically very fast, on the order of a few ns.

SMBJ12CAHE3/5B TVS devices are very easy to use. They are installed across two conductive connection, usually the power and ground lines in the system. When a transient voltage impulse, such as a static discharge or lightning strike is applied to the device, the voltage will be clamped and then dissipated safely into the system’s ground. This provides a great level of protection to the system from overvoltage transients.

In conclusion, the SMBJ12CAHE3/5B is an ideal choice for automotive, telecommunications, computers and other applications. It has a fast response time, good clamping voltage and high current and power ratings. It also has a wide operating temperature range, fast response time, and does not require a minimum operating current for required protection. It is an excellent candidate for protection of low power circuits from transients and ESD.

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