MASMBJ90CAE3

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The MASMBJ90CAE3 is a specialized automotive-grade device, designed for special applications and tough environmental conditions. It is a TVS - Diodes device which are often used to protect their circuits from high voltages or current transients.

Typically the MASMBJ90CAE3 device is used to provide electrostatic discharge (ESD) protection and is available in an SOT-23 package with a voltage rating of 48.7 V. Its maximum peak pulse power is 500 W and it also has a 6 A peak pulse current rating. The device features a silicon body and an avalanche breakdown rating of 55 A.

The working principle of the MASMBJ90CAE3 mainly focuses on the avalanche breakdown of the junction diodes. This is a phenomenon that occurs when a diode is subjected to an electric field that is greater than its breakdown voltage. This causes electrons within the diode to be accelerated until they reach a speed that can liberate additional electrons from the diode material, creating a chain reaction of electrons and generating a current.

The avalanche breakdown phenomenon is often used in an automotive application due to its high breakdown rating and low voltage clamping. This is achieved by using the ESD protection diode to protect against electrostatic discharge events, such as when the automotive electrical system is exposed to sudden electrical surges via potentially faulty wiring or contact with high-voltage terminals.

The working principle of the MASMBJ90CAE3 is based on this avalanche effect and its robustness is due to its precise over-voltage protection limits and consistent characterisation of the parameters of the diode. The diode is designed to not be over-driven by transients at any given voltage level, so it does not experience any degradation, fatigue or changes in its characteristics.

The working principle of the MASMBJ90CAE3 also includes a ‘clamp element’ which is used to protect the under-voltage and over-voltage service conditions. When the device is used in the circuit, it acts as a shield and prevents any sudden or harmful voltage transients from entering the circuit. The device also provides a reverse current flow protection, which prevents reverse power flow in the circuit.

The MASMBJ90CAE3 device is often used for applications in automotive entertainment and navigation systems, as well as lighting and safety systems. It is an ideal choice for protecting the circuits of such systems from high voltage transients and spikes, providing an improved system performance and reliability.

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