SMAJ58CA-Q

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Transient Voltage Suppressing diodes (TVSs) are an important type of electronic device used in many consumer electronics and industrial electronics applications. They are designed to protect sensitive circuitry from transient electrical surges, and are commonly used to minimize the effect of noise from nearby wiring or other components. The SMAJ58CA-Q is a small-signal, bidirectional TVS Diode, specifically designed to protect sensitive electrical components from high-frequency transients. It is used in a wide range of applications, including power supply and power conditioning, telecommunication systems, medical devices, computers, and automotive systems.

The SMAJ58CA-Q is a low capacitance, SOD-123 package TVS. It features a low clamping voltage of 5.8V, making it ideal for protecting automotive wiring applications. The device also has an E-line linear surge current of 8A, which is sufficiently high enough to protect against the effects of surges caused by power transients. In addition, its peak non-repetitive surge current is over 25A, allowing it to handle more severe transients. The TVS delivers fast response times (less than 1µs) and offers excellent protection against over-voltage transients, thermal runaway, and over-concial outputs.

The SMAJ58CA-Q works on the principle of avalanche breakdown which occurs when an electric field is applied across the junction of a diode, causing the free electrons to build up energy until they gain enough energy to break through the energy band gap. The free electrons are then accelerated across the junction, creating a large current. This current is nearly instantaneously clamped when the internal avalanche breakdown diode quickly intercepts the rising voltage. This provides a fast clamping response and is essential in protecting electronic parts from high-voltage transients.

The SMAJ58CA-Q is designed for applications such as voltage protection in automobile systems, equipment protection in computer peripheral and communications systems, and telephone line interfacing protection. It is also commonly used in various automotive systems, including alternators, computers, sensors, and other equipment related to safety and information.

In terms of its operation, the SMAJ58CA-Q is usually triggered by a fast rise time surge on its output signal line, which is sensed by the avalanche breakdown junction. When triggered, the diode will quickly clamp the output voltage to a safe, low level. Additionally, the TVS Diode has an internal zener diode, which clamps the voltage at the negative input to reduce the amplitude of the surge and prevent it from propagating to the rest of the circuit.

In summary, the SMAJ58CA-Q is an efficient and reliable TVS Diode, providing fast response times and excellent protection against transients. It is ideal for automotive applications, as well as computer and communications systems, and other applications which require protection from voltage transients. With its low capacitance, fast response time, and high clamping voltage, it is an excellent solution for many voltage protection applications.

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