MASMCJ90AE3

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TVS – Diodes, or Transient Voltage Suppression Diodes, are used to protect electronic circuits and devices from being damaged by transient overvoltage, often caused by lightning strikes or electrostatic discharges. The MASMCJ90AE3 is a popular device belonging to this class of components, and this article will provide an overview of its application field and principle of operation.

Application Field and Framework

The MASMCJ90AE3 is a uni-directional, diode-based TVS suitable for protecting against short, fast-rising transient overvoltages. This device has an excellent power capability, boasting a pulse power of 8.9 kW at 8/20μs, as well as a VBR of 90V.

The MASMCJ90AE3 is typically used in automotive applications, for example circuit board protection and load dump protection. It is also useful for general purpose suppression needs, in environments which contain potentially hazardous levels of electrostatic discharges or voltage surges. Common applications also include power MOSFETS, data lines, and switching regulators. This device may also be employed within mobile phone base stations and satellite equipment.

The MASMCJ90AE3 is a surface mount component ideal for constructing ‘snubber’ circuits such as those used to protect power buses and signal lines. It is available in a lead-free, UL recognized, SOP-8 package, as well as a SOT23 package.

Working Principle

A TVS diode operates by creating a low impedance path, and thus diverting any destructive current away from the protected device. When the voltage across the TVS exceeds its breakdown voltage, the PN junction breaks down and creates a conducting channel.

Once the transient has ended, the TVS diode quickly recovers and the PN junction closes, re-establishing an open circuit protection. This entire process occurs in a matter of nanoseconds, allowing protection against fast transient surge without impairing normal circuit operation.

The MASMCJ90AE3 is specially designed to protect against fast rising transients. The Human Body Model (HBM) Electro-Static Discharge (ESD) protection capability of this diode is 15kV, allowing it to effectively protect against shock. It also exhibits exceptional clamping performance, as demonstrated by its Ipp pulse power rating of 8.9kW.

In conclusion, the MASMCJ90AE3 is a reliable and safe device for the suppression of short, fast-rising transient overvoltages in automotive and other general purpose applications. It is available in an SOP-8 and SOT23 package, both of which are lead-free and UL recognized. It provides excellent ESD protection of 15kV and a peak pulse power of 8.9kW, in addition to superior clamping performance.

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