TPSMA18HE3_A/I

Voltage - Clamping (Max) @ Ipp:	26.5V
Supplier Device Package:	DO-214AC (SMA)
Package / Case:	DO-214AC, SMA
Mounting Type:	Surface Mount
Operating Temperature:	-65°C ~ 185°C (TJ)
Capacitance @ Frequency:	--
Applications:	Automotive
Power Line Protection:	No
Power - Peak Pulse:	400W
Current - Peak Pulse (10/1000µs):	15.1A
Series:	Automotive, AEC-Q101, PAR®
Voltage - Breakdown (Min):	16.2V
Voltage - Reverse Standoff (Typ):	14.5V
Unidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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TPSMA18HE3_A/I is a kind of TVS - Diodes (Transient Voltage Suppression Diode) products, used in various electrical circuits. It has a peak surge current of 18A and a reverse stand-off voltage of 3V.The purpose of a TVS diode lies in protecting a circuit against any kind of abnormal voltage changes, specifically lightning-induced or ESD (electrostatic discharge) transients, meanwhile not affecting the normal operation of the circuit. TVS diodes provide more effective protection than zener diodes, since TVS diodes are able to absorb more surge energy before they breakdown. Furthermore, TVS diodes also have much shorter response time, around nanoseconds, compared to the several milliseconds that a zener diode requires to respond.In order to make a better understanding of the TPSMA18HE3_A/I device, its working principle should be taken into account. In essence, the device works as a clamp, by limiting the voltage across a protected circuit by clamping the voltage differential to a predetermined threshold voltage. During normal operation, it acts as an open circuit with negligible forward voltage drop. When an overvoltage occurs, the diode will respond by clamping the voltage across the terminals, allowing for a flow of current which will be limited by the capabilities of the diode.The TPSMA18HE3_A/I device can be used in various applications, forming a crucial part of a protection circuit, placed between the vulnerable circuitry and the primary power line. It is usually used in automotive, industrial, communication, and any other applications where high current surges need to be taken into consideration. With a rated peak power dissipation of 3.1W and an excellent clamping performance, the device is capable of reliably protecting critical electronic systems, even during sustained high energy surges. Its stand-off voltage is rated for 3V, allowing the terminals to remain unconnected until the clamping voltage is reached and enabling the device to be used in a broader range of applications.In conclusion, the TPSMA18HE3_A/I device is an ideal choice for any circuit that needs robust protection against voltage fluctuations. With its ability to clamp voltage at a predetermined threshold, its fast response time and its excellent peak surge current rating of 18A, the device is able to offer reliable protection in a wide range of applications. The device is able to limit the voltage differential between its terminals, allowing the protected circuitry to remain unharmed during high current surges, while providing protection that can exceed that of traditional zener diodes.

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