SMAJ18A-E3/5A Circuit Protection

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TVS diodes, also known as Transient Voltage Suppression (TVS) diodes, are widely used for protecting low-voltage power supplies against electrical transients, or voltage spikes. One of the most popular types of TVS diode is the SMAJ18A-E3/5A.

The SMAJ18A-E3/5A is a low-power diode designed specifically to provide protection against electrical transients with a peak pulse power rating of 600 watts (10/1000s). It is used in a range of applications from portable devices and computers to automotive electronics. It is also well-suited for protecting sensitive low-voltage circuits from the effects of electrical transients that can be produced by noise or interference from other electrical components.

The SMAJ18A-E3/5A has a low leakage current of <1 micro-ampere which helps to protect sensitive low-voltage circuits and a low clamping voltage of 5.3 volts at the 8 amperes maximum a surge current. This diode can be operated over a wide temperature range from -55°C to +150°C and is available in a variety of packages to meet the needs of the application.

The SMAJ18A-E3/5A has a number of features that make it ideal for use in TVS diode applications. The main features of this particular diode include:

• Low clamping voltage for protection of low-voltage circuits
• High surge current capability
• Excellent reverse leakage current control
• Low off-state capacitance
• Low on-state capacitance
• High power rating
• Wide operating temperature range

The SMAJ18A-E3/5A diode works by allowing a low leakage current to flow in one direction (forward) and blocking any reverse currents, while at the same time providing a low voltage clamping value to protect sensitive circuits. The low reverse leakage current helps to protect the device against reverse transients, while the clamping voltage helps to limit the amount of overvoltage that can pass through the device.

When there is a voltage spike or an electrical transient, the diode begins to rapidly conduct, thus limiting the voltage to a safe level and preventing damage to the device or the circuit. In addition, the SMAJ18A-E3/5A offers excellent overvoltage protection due to its low off-state capacitance and low clamping voltage. This helps to protect sensitive circuits from overvoltage conditions caused by ESD or inductive switching.

The SMAJ18A-E3/5A is an ideal choice for protecting low-voltage power supplies against electrical transients. This diode has a wide operating temperature range, a high surge current rating, and excellent reverse leakage control. It is available in a variety of packages to suit a variety of applications. The low clamping voltage helps to limit the effects of transients and the low reverse leakage current helps to protect from reverse transients.

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