MASMLG48AE3 Circuit Protection

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TVS - Diodes - MASMLG48AE3 application field and working principle

Transient Voltage Suppressor (TVS) Diodes are widely utilized for the prevention of high voltage surges. Examples include semiconductor protection, automotive power electronics systems, telecom/data equipment, consumer electronics and more. The MASMLG48AE3 is a unidirectional bidirectional TVS diode for suppressing voltage transients generated by ESD, lightning, and inductive load switching.

MASMLG48AE3 Application Field

The MASMLG48AE3 is most suitable for use in applications such as IEC 61000-4-2, electrostatic discharges; IEC 61000-4-4, fast transients; and IEC 61000-4-5, surges. This diode provides a low clamping voltage with typical on-state resistance. The high surge capability of the MASMLG48AE3 also corresponds to low effective capacitance to reduce signal integrity distortion on high-speed data lines.

MASMLG48AE3 Working Principle

The fundamental purpose of a TVS diode is the clamping of voltage transients and surges caused by a malfunctioning equipment coupled with an alternating current. The MASMLG48AE3 works to absorb the electric current associated with these transients which arise from either external sources such as lightning or induced by internal sources such as electromagnetic interference (EMI) or electrostatic discharge (ESD) leakage currents. The main advantage of utilizing a TVS is its low clamping voltage and low capacitance, thus allowing it to reduce the peak amplitude of the transient without causing any signal distortion.

The MASMLG48AE3 is made up of two subassemblies, an upper voltage breakdown layer which, when exposed to a voltage transient higher than the maximum allowed voltage of the device, reverses the current flow through the diode’s junction. The reverse current flow creates the reverse bias voltage across the junction and clamps the voltage transient. The lower resistance layer is used to send the current to ground, reducing the on-state resistance to an acceptable level for an efficient transient suppression device.

Conclusion

The MASMLG48AE3 is a reliable, high powered, low capacitance diode designed to protect against voltage transients and surges associated with ESD, EMI, and lightning. The low clamping voltage and effective capacitance makes it suitable for applications such as IEC 61000-4-2, -4-4, and -4-5. The unique subassemblies design significantly contributes to its effective operation.

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