CD143A-SR2.8 Circuit Protection

Voltage - Clamping (Max) @ Ipp:	5V
Supplier Device Package:	SOT-143
Package / Case:	TO-253-4, TO-253AA
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 125°C (TJ)
Capacitance @ Frequency:	4.5pF @ 1MHz
Applications:	Ethernet
Power Line Protection:	Yes
Power - Peak Pulse:	200W
Current - Peak Pulse (10/1000µs):	12A (8/20µs)
Series:	--
Voltage - Breakdown (Min):	3V
Voltage - Reverse Standoff (Typ):	2.8V
Unidirectional Channels:	2
Type:	Steering (Rail to Rail)
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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TVS - Diodes

Transient Voltage Suppression (TVS) diodes are device components used to guard sensitive circuits from overvoltage events. They are usually connected directly to the circuit board and come in a variety of form factors, including surface-mounted devices or stand-alone devices. This allows them to provide protection from a wide range of voltage events, from the high energy transient onrush of electricity caused by a nearby lightning strike to the small electrical fluctuation created by switching the power on or off. TVS diodes switch from their quiescent (off) state to their active (on) state when a threshold voltage spike is detected, clamping the peak voltage at a point before it reaches the sensitive electronic components. One example of a popular TVS diode is the CD143A-SR2.8. This diode is rated to handle up to 23 Amps of peak energy and 33 volts of peak voltage. It\'s ideal for applications where transient voltages can exceed 30 volts, and it provides both over-voltage and over-current protection. It is also UL, IEC, and CSA recognized and compliant with RoHS requirements, making it an excellent choice for industrial electronics, communication systems, automotive systems, and other applications requiring durable and reliable protection. The CD143A-SR2.8 has a dual stage protection scheme. Its first stage is Acting In Concurrently (AIC) mode and its second stage is holding voltage (HV) mode. During AIC mode, the diode senses the abrupt voltage increase and conducts current up to its rated value. This current on surge is dissipated in the TVS diode, protecting the equipment from the over-current condition. During the HV mode, the diode maintains the over-voltage level within safe limits, thus preventing any damage due to excessive voltages. The CD143A-SR2.8 works in reverse polarity with respect to the direction of conductivity. This diode can detect very short and high voltage events and respond quickly for pre-determined time periods and is able to withstand temperature-cycling and power-cycling stress up to its maximum ratings. With a power cooling rating of 65W and a peak pulse current rating of 230A, it is suitable for use in high power applications. In addition, this diode can also operate in repetitive mode, meaning it can protect against multiple over-voltage events. It is also rated for transient response time of less than 1.0µS and can handle up to 78V of reverse breakdown voltage without any failure, providing further protection during power cycling or voltage spikes. Thus, the CD143A-SR2.8 is a reliable and cost-effective TVS diode that is suitable for use in a wide variety of applications. It is a UL approved device, provides fast response time to protect against over-voltages, and is capable of handling high power while remaining within safe limits. With these factors, the CD143A-SR2.8 can be used to effectively protect systems without the need for additional external components.

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