MASMBJ12AE3 Circuit Protection

Voltage - Clamping (Max) @ Ipp:	19.9V
Supplier Device Package:	SMBJ (DO-214AA)
Package / Case:	DO-214AA, SMB
Mounting Type:	Surface Mount
Operating Temperature:	-65°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	600W
Current - Peak Pulse (10/1000µs):	30.2A
Series:	Military, MIL-PRF-19500
Voltage - Breakdown (Min):	13.3V
Voltage - Reverse Standoff (Typ):	12V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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Introduction

TVS – Diodes are the latest generation of semiconductor devices designed to protect circuits from overvoltage (ESD) caused by voltage spikes and transients. The MASMBJ12AE3 is a transient voltage suppressor diode specifically designed for use in high-speed, low-impedance circuit applications. It is an ultra-compact device, measuring just 0.4”x0.4”, and has a wide operating temperature range from -60℃ to + 175℃. It is intended for use in automotive, industrial, and consumer systems.

Application Field of MASMBJ12AE3

MASMBJ12AE3 is used to protect electronic circuits from potentially damaging transients such as electrostatic discharge (ESD) and lighting strikes, as well as from other over-voltage transients. This device is particularly useful in automotive applications due to its small size, low impedance, and wide temperature range. It is suitable for use in a wide range of automotive, industrial, and consumer applications, such as automobiles, motorcycles, ATVs, medical equipment, home electronics, and consumer electronics. It is also suitable for RF protection due to its ultra-fast clamping response.

Working Principle of MASMBJ12AE3

MASMBJ12AE3 is a two-terminal, unidirectional transient voltage suppressor (TVS) designed to protect electronic circuits from damaging transients. It works by clamping the voltage at a set level when a transient is detected. The device features a high peak pulse current handling capability along with low clamping voltage and fast clamping response time. When a transient voltage is present, the device will immediately conduct to reduce the voltage to the required level. After the transient has dissipated, the device will quickly recover to its normal low impedance state. In addition, the device features an over-temperature protection capability to ensure safe operation in higher ambient temperatures.

Conclusion

In conclusion, MASMBJ12AE3 is an ultra-compact transient voltage suppressor diode that is especially suited for automotive, industrial and consumer applications. It provides excellent protection from over-voltage transients, electrostatic discharge, and lightning strikes. The device is highly reliable and can operate in a wide temperature range from -60℃ to + 175℃. Its high peak-pulse current capability and low clamping voltage ensure a quick and reliable response time.

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