SMA5J17CA-M3/5A

Voltage - Clamping (Max) @ Ipp:	27.6V
Supplier Device Package:	DO-214AC (SMA)
Package / Case:	DO-214AC, SMA
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	500W
Current - Peak Pulse (10/1000µs):	18.1A
Series:	TransZorb®
Voltage - Breakdown (Min):	18.9V
Voltage - Reverse Standoff (Typ):	17V
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

The SMA5J17CA-M3/5A is a TVS - Diode that is suitable for a wide variety of applications from cable assembly protection to power lines protection in vehicles. It is a two-terminal integrated circuit that works like a zener diode and is designed to provide transient overvoltage protection. It is a combination of a Zener diode and a FET in one package, and has an extremely fast response time.

Application Field

The SMA5J17CA-M3/5A is a unidirectional device, that is, it only allows current to flow in one direction. It is mainly used in the protection of cables, including data-rate networks, signal lines, and automotive components.In automotive applications, it is used in power lines to protect the electronics from voltage transients and short circuits. It is also used in electronic brake and airbag systems for surge protection. Moreover, the SMA5J17CA-M3/5A provides robust protection in harsh industrial environments.

Working Principle

The SMA5J17CA-M3/5A is a Reverse Standoff Voltage (ROV) protection device. It works by clamping the voltage across its terminals to the Clamping Voltage (VC) during transient overvoltage events.When no transient voltage is present, the voltage across the SMA5J17CA-M3/5A stays at or near the Reverse Standoff Voltage. When a transient voltage occurs, the diode conducts current that passes through the FET, thus clamping the voltage across its terminals to the Clamping Voltage. The Clamping Voltage of the SMA5J17CA-M3/5A is typically around 5.5V.

Conclusion

The SMA5J17CA-M3/5A is a TVS - Diode suitable for many applications, especially in the automotive and industrial sectors. It has an extremely fast response time and provides robust protection. It works by clamping the voltage across its terminals to the Clamping Voltage during transient overvoltage events, thus protecting the electronics from voltage transients and short circuits.

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