MASMLJ40CA/TR Circuit Protection

Current - Peak Pulse (10/1000µs):	46.4A
Supplier Device Package:	SMLJ (DO-214AB)
Package / Case:	DO-214AB, SMC
Mounting Type:	Surface Mount
Operating Temperature:	-65°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	3000W (3kW)
Series:	Military, MIL-PRF-19500
Voltage - Clamping (Max) @ Ipp:	64.5V
Voltage - Breakdown (Min):	44.4V
Voltage - Reverse Standoff (Typ):	40V
Bidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active

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MASMLJ40CA/TR TVS - Diodes Application Field and Working Principle

TVS (transtoroidal voltage suppressors) - diodes are an essential component of modern-day electronics, providing reverse polarity protection and other essential features to facilitate reliable operation. The MASMLJ40CA/TR TVS - diodes from Littelfuse is a robust and high-performance device that offers protection from surge currents up to 40A. In this article, we’ll explore the various applications of the MASMLJ40CA/TR as well as the underlying working principle.

Applications

The MASMLJ40CA/TR is designed for applications that require protection from surge currents up to 40A. These include circuit protection for high-speed interfaces such as USB, HDMI, DVI, and Fiber Optics. This device also provides reliable protection for voltage-sensitive vulnerable circuits such as microprocessors, ASICs, and power ICs. It features high-temperature performance across a wide range of environmental conditions, making it suitable for use in outdoor applications such as industrial, telecom, and transportation equipment. Other applications include PoE, Clamp & Buck, and Source side power distribution.

Working Principle

The MASMLJ40CA/TR TVS - diodes are built using a powerful and reliable Zener diode technology. When subject to a surge, these diodes work by diverting the current away from sensitive circuits and into the ground. The protected circuits remain in approximately the same potential state as before the surge event, thus avoiding damage due to destructive over-voltage. The device is built around a p-n junction diode, with a special design feature that prevents current from going in the reverse direction. The MASMLJ40CA/TR contains two junctions with opposing dopings, and a breakdown must occur between the junctions in order for the device to work. During normal operation, the device remains in a non-conductive state. However, when an ESD or any other surge of energy is detected, the voltage across the Zener diode exceeds the breakdown voltage, causing it to enter into a conductive state. This in turn diverts any additional current away from vulnerable circuits and into the ground.

Conclusion

The MASMLJ40CA/TR TVS - diodes from Littelfuse are designed for applications that require protection from surge currents up to 40A. These diodes work by diverting the current away from sensitive circuits and into the ground, protecting them from the risks of overvoltage and destructive current surges. The device is built around a p-n junction diode, with a special design feature that prevents current from going in the reverse direction. Its high-performance design and wide range of applications make it a valuable component for any high-speed electronic circuit.

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