MSMLJ18A

Voltage - Clamping (Max) @ Ipp:	29.2V
Supplier Device Package:	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)
Current - Peak Pulse (10/1000µs):	102.8A
Series:	Military, MIL-PRF-19500
Voltage - Breakdown (Min):	20V
Voltage - Reverse Standoff (Typ):	18V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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MSMLJ18A TVS - Diodes Application Field and Working Principle

MSMLJ18A is a type of a bidirectional Transient Voltage Suppressor (TVS) diode that is produced by ON Semiconductor, an American manufacturer of semiconductor components and products. This type of diode is designed for protecting equipment from transient voltages, also known as electrostatic discharge (ESD) and Electrical Fast Transient (EFT). In this article, we will be discussing the application field and working principle of MSMLJ18A TVS - diodes.

Application Field

MSMLJ18A diodes are commonly used in many different industries, ranging from consumer electronics to automotive and medical applications. In consumer electronics, they are used for protecting sensitive circuits such as CPUs, memory chips, and analog components from damages due to ESD and EFT. In automotive applications, these diodes are used for protecting fuel pumps and control modules from power surges and electrical interference. They are also used in medical devices such as pacemakers and respirators to provide EMC immunity against external electromagnetic fields. MSMLJ18A diodes are also used in automotive lighting systems to protect bulbs from sudden voltage spikes.

Working Principle

The working principle of MSMLJ18A TVS - diodes is relatively simple. These diodes are built with an active junction between two p-type and n-type layers. This junction creates a highly conductive channel, which is able to conduct a large amount of current when exposed to a voltage surge. The amount of current that is conducted through this channel depends on the voltage of the surge. When exposed to a voltage surge, the diode will quickly switch into a low resistance mode and start conducting current. This mechanism helps to dissipate the energy from the surge before it reaches the vulnerable electronics.The MSMLJ18A series are offered in various configurations, including non-polarized, symmetrical, and asymmetrical configurations. The maximum voltage rating of the MSMLJ18A diodes is 18V, the maximum peak pulse current is 8.3A, and the maximum junction capacitance is 1.3nF.

Conclusion

MSMLJ18A TVS - diodes are designed for protecting sensitive circuits and components from transient voltages. These diodes are commonly used in consumer electronics, automotive, and medical applications, and work by quickly conducting current during a voltage surge, thus dissipating the excess energy and protecting the vulnerable electronics. The MSMLJ18A series have a maximum rating of 18V, 8.3A peak pulse current, and 1.3nF junction capacitance.

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