SMC3K26CA-M3/57

Voltage - Clamping (Max) @ Ipp:	42.1V
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):	71.3A
Series:	TransZorb®
Voltage - Breakdown (Min):	28.9V
Voltage - Reverse Standoff (Typ):	26V
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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TVS - Diodes: SMC3K26CA-M3/57 application field and working principle

TVS or Transient Voltage Suppression diodes are extensively used in the majority of modern electronic circuits. They are similarly based on the silicon diode technology and used to protect delicate electronic components from lightning strikes and line surges. These devices are the fundamental element of the majority of electrical and electronics engineering systems to protect them from overvoltage. Among the most common ones is the SMC3K26CA-M3/57, and here we shall learn about its application field and working principle.The SMC3K26CA-M3/57 is available in two distinct packages. It is offered in a two lead epoxy resin molded resin package and a three lead molded dual in-line package. Starting from its most basic functionality, both of these packages act as voltage-dependent resistors which can rapidly conduct high current pulses when triggered by high voltage levels. This so-called “avalanche effect” happens when the diode is subjected to excessive voltage. In this way, the SMC3K26CA-M3/57 works as both an alternative to the silicon diodes and the MAXIMUM Power Dissipation keeps these devices relatively small.The applications for the SMC3K26CA-M3/57 are quite extensive. First of all, it can be used to protect sensitive electronic equipment that can be damaged by electrotechnical transients such as power supply surges and electrostatic discharges. It is also suitable in applications that require EMI/RFI filtering. Overvoltage and electricity shortages proofing protection circuits, electronic equipment for communication transmissions, computer and office equipment, peripheral devices, short-wave antennas, electrical appliances, and data-lines are some of the most common applications of this kind of diode.Regarding its working principle, the SMC3K26CA-M3/57 is able to prevent overvoltage because of its semiconductor construction. This diode is built with a PN junction semiconductor, usually made out of silicon, germanium, or gallium arsenide. Under normal conditions, the electric charge strain in the diode flows from the “P type” material to the N type”, creating a current that can move the charge and form a discrete current. Once the voltage exceeds the breakdown voltage of the diode, the charge of the diode starts to break down in an avalanche effect and triggers the so-called “snap-back”. This “snap-back” is a characteristic of the diode that allows quickly conduct large amounts of current. This helps to prevent damage to the electronic equipment when too high voltage is applied to it.Overall, the SMC3K26CA-M3/57 is a highly versatile device that can be used in a wide range of applications. It is a fundamental piece of every electrical circuit to protect every component from overvoltage, typically due to a surge, spike, or abnormal spike of the signal current. Furthermore, it works similarly to the silicon diodes but it offers better properties, such as a higher breakdown voltage at a much lower cost.

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