SM6T18CAY Circuit Protection

Current - Peak Pulse (10/1000µs):	123A (8/20µs)
Base Part Number:	SM6T
Supplier Device Package:	SMB (DO-214AA)
Package / Case:	DO-214AA, SMB
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	Automotive
Power Line Protection:	No
Power - Peak Pulse:	600W
Series:	Automotive, AEC-Q101, SM6TY, TRANSIL™
Voltage - Clamping (Max) @ Ipp:	32.5V
Voltage - Breakdown (Min):	17.1V
Voltage - Reverse Standoff (Typ):	15.3V
Bidirectional Channels:	1
Type:	Zener
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Introduction

Surge-protective-diode (SPD) is an essential component in many electronic devices, and SM6T18CAY is one of the most widely used SPD in various fields. It is mainly used to protect electrical and electronics systems from damage due to transient voltages caused by lightning and other phenomena. The SM6T18CAY is a zinc oxide surge protective diode from a series of transient voltage suppressors (TVSs) manufactured by NXP, with an incredibly wide range of applications. Its low clamping voltage is especially suitable for devices with low power voltage.

Application Fields of SM6T18CAY

One of the most common applications for SM6T18CAY is its use in line protection. It is used to protect terminals from transient voltage surges caused by lightning strikes or power outages. SM6T18CAY parts are designed for use in high-speed communication lines and data lines in outdoor applications, such as outdoor games equipment and communication satellites. In addition, SM6T18CAY is also widely used in the automotive industry to protect sensitive electronic circuits from damage due to electrostatic discharge (ESD) and transients.

Working Principle of SM6T18CAY

When lightning, static electricity, ESD, and other transients occur, the SM6T18CAY will quickly absorb the electrical surges, diverting it away from sensitive circuit components. It does this by clamping the voltage down to a safe level through a combination of conduction and resistance processes. The device works on the principle of breakdowns. Its metal-oxide semiconductor material is designed tovaristor to conduct electricity when exposed to high voltages. After the electrical surge is diverted away from the sensitive circuits, the SM6T18CAY part will reset and return to normal operation.

Conclusion

Surge-protective-diode (SPD) is an incredibly important component of many electronic devices and systems. SM6T18CAY is a zinc oxide SPD from the TVSs series of transients voltage suppressors. Its low clamping voltage is especially suitable for low-power voltage devices and it is mainly used for line protection and outdoor games equipment, communication satellites, and automotive industry to protect from damage due to transient voltage surges and ESD. Its working principle is based on breakdowns and conduction and resistance processes.

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