SMAJ150AHE3/5A

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TVS (Transient Voltage Suppressor) diodes provide protection for a variety of electronic components and systems, protecting them from transient voltage spikes. The SMAJ150AHE3/5A TVS diode is a bi-directional (bidirectional) diode with Unidirectional and bidirectional versions available, and is designed for a range of applications in the defence, aerospace, automotive, and industrial sectors.

Applications

The SMAJ150AHE3/5A diode is designed for applications where a surge protection of up to 150 W will be required to prevent damage, or to mitigate risks, from transient voltage spikes. Common applications include:

• Military and aerospace equipment, such as aircraft and missiles;
• Automotive electronics, such as electronic fuel injection systems and engine control units;
• Industrial equipment, such as programmable logic controllers; and
• Surge protection of telecommunications devices, including mobile phones and wireless networking components.

The diode is also suitable for use in consumer electronics, including computers and home appliances.

Working Principle

In a bi-directional diode with unidirectional and bi-directional versions, a voltage spike is limited by clamping the voltage across a conducting diode. As the voltage across the diode reaches a certain level, the diode begins to conduct. This ‘clamping’ action limits the amount of voltage present in the electrical circuit, preventing damage and disruption to the system.

In the unidirectional diode, the protection voltage is typically specified for only one direction of travel, allowing it to be used in some applications, such as in a one-way protected circuit. In the bidirectional version, the protection voltage is typically specified for both directions, allowing it to be used in applications where the current can potentially flow in either direction.

The diode acts as a nonlinear device, which means that the voltage across the diode increases at an increasing rate and then collapses rapidly when the pulse of voltage arrives. This rapid collapse ensures that the components in the circuit are not damaged by the transient voltage.

The SMAJ150AHE3/5A diode is designed with a low on-state voltage drop, making it suitable for high-speed applications, and a wide operating temperature range. This diode is also designed for a very low component profile, allowing for easy mounting and integration into existing equipment and designs.

The SMAJ150AHE3/5A diode is designed to provide protection from transient voltage surges, with a maximum power of 150 W, and is suitable for a range of applications where a surge protection of up to 150 W is required. The diode is available in both unidirectional and bidirectional versions, and is designed with a low on-state voltage drop, a wide operating temperature range, and a very low profile for easy mounting and integration.

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