SMC3K75CA-M3/9A

Voltage - Clamping (Max) @ Ipp:	121V
Supplier Device Package:	DO-214AB (SMCJ)
Package / Case:	DO-214AB, SMC
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	3000W (3kW)
Current - Peak Pulse (10/1000µs):	24.8A
Series:	TransZorb®
Voltage - Breakdown (Min):	83.3V
Voltage - Reverse Standoff (Typ):	75V
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

SMC3K75CA-M3/9A is a type of TVS (Transient Voltage Surge Suppressor) Diode. It enables electric devices to protect themselves from excessive input voltages. The voltage that the SMC3K75CA-M3/9A can handle is up to 75A (75 amperes) which corresponds to 900 Watts. The device has a low on state voltage drop of only 0.4 V and a fast response time of 550ps (picoseconds). It is suitable for a very wide range of applications, including IT equipment, data centers, telecoms, consumer electronics, etc.

Application Fields

The most common application of the SMC3K75CA-M3/9A are in IT equipment, data centers, telecoms, consumer electronics. The device is used mainly to protect equipment from power surges, as well as from overvoltage conditions. It is also used in a number of other applications, such as in automotive and industrial applications, where it helps to protect against transient over-voltage conditions. In the automotive sector, the device is used to protect against voltage spikes which can be caused by machine and equipment operators or sudden electrical combinations which can damage the system and components. In industrial applications, the device is used to provide protection to automated systems, machines, and equipment. In the telecoms sector, it helps protect against voltage spikes too, which can be caused by external RF (radio frequency) signals, lightning, etc. This device is essential for protecting the transceivers and receivers from getting damaged due to transient overvoltages.

Working Principle

The working principle of the SMC3K75CA-M3/9A is based on the principle of clamping protection. The device is connected across the power lines of the equipment and acts like a clamp, keeping the voltage from exceeding the threshold voltage of the device. The device can handle up to 75A and can dissipate up to 900 Watts of power. When the temporary voltage condition is no longer present, the clamping device returns its protection level to normal, thus making the device ready for the next power surge. The fast response time of 550ps helps to keep the voltage below the threshold for a very short period of time, thus protecting the device.

Conclusion

The SMC3K75CA-M3/9A is a type of Transient Voltage Surge Suppressor (TVS) diode. It is widely used in IT equipment, data centers, telecoms, consumer electronics, automotive, and industrial applications to provide protection against voltage spikes. The device can handle up to 75A and can dissipate up to 900 Watts of power and has a low on-state voltage drop of 0.4 V and a fast response time of 550ps. The device works on the principle of clamping protection and helps to protect equipment from power surges and overvoltage conditions.

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