SMCJ40A-M3/9AT

Voltage - Clamping (Max) @ Ipp:	64.5V
Supplier Device Package:	DO-214AB (SMC)
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:	1500W (1.5kW)
Current - Peak Pulse (10/1000µs):	23.3A
Series:	TransZorb®
Voltage - Breakdown (Min):	44.4V
Voltage - Reverse Standoff (Typ):	40V
Unidirectional 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 refer to a kind of voltage-transient suppressive devices, and SMCJ40A-M3/9AT are designed as such. These components are mainly used to safeguard sensitive circuitries and components froman excess of voltage transients, which may damage them irreversibly. Unforeseen excesses can be caused by circuits going out of the steady state, and this is why it is necessary to provide extra protection from this kind of phenomenon.This device, specifically, is a uni-directional suppressor diode, meaning that it exclusively works on positive transients. It features a wide variety of packing options, and it is specially designed for surface mounting onto printed circuit boards. This component is also specially constructed to be used in automotive environments.The SMCJ40A-M3/9AT provides an extremely fast response to voltage transients, clamped at up to 40V of peak voltage. It also features an ESD rating of up to 24kV of peak voltage. Additionally, it features an excellent thermal response, with an IHDA power dissipation due to surge currents of up to 1500 watts. Its operating temperature range is -55°C to +150°C.The underlying working principle of this type of device is based upon the fact that current only flows in one direction, thus protecting sensitive components at the electrical circuit in which it is connected. It makes use of a semiconductor junction of two opposing materials, generating a diode effect in which electrons are able to flow easily from one material to another.This component is ideal for a variety of applications, such as on computers, on power lines and even in automotive equipment. Due to the wide temperature range and ESD protection, it makes for an extremely robust option to protect sensitive equipment and components.The SMCJ40A-M3/9AT is an example of a diode that provides quick and reliable protection from unexpected voltage transients. Its wide temperature range, ESD protection and diode effect makes it a great choice for any situation where it is necessary to provide protection from high voltage transients. Being small and designed for surface mounting onto circuit boards, it is also a great option for applications in tight spaces.

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