SMCJ40ATR

Voltage - Clamping (Max) @ Ipp:	64.5V
Supplier Device Package:	SMC (DO-214AB)
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):	23.2A
Series:	--
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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SMCJ40ATR Application Field and Working Principle
SMCJ40ATR, which stands for ‘Surface Mounted Glass Passivated Junction Transient Voltage Suppressor’, is a type of TVS-Diode. It belongs to the family of bi-directional, bi-polar, glass-passivated junction Transient Voltage Suppressors (TVS-Diodes) from Littelfuse company. SMCJ40ATR is specifically designed for applications in high temperature environments, it offers excellent electrostatic discharge (ESD) performance and can function in conditions with a wide range of temperatures and temperatures ranges, as it is designed to withstand temperatures up to 175°C.Application Field of SMCJ40ATR
SMCJ40ATR is mostly used in the automotive industry for ESD protection, in heavily-engineered automobile systems and in engine and body control modules. It can also be used in computer, microprocessor, and electrical system protection. Its application extends to consumer electronics, such as digital and analog circuitry, as needed for power management, charging, or voltage protection circuits. SMCJ40ATR also finds its uses in industrial and military sectors, where it can effectively protect against ESD and EMC surges.How Does SMCJ40ATR Work?
The functioning of SMCJ40ATR depends on the nature of the transient voltages at its terminals. When a negative going ESD pulse is applied to its terminals, the transistor NPN turns on, diverting the current away from its output. A positive going ESD pulse causes the PNP transistor to turn on and, likewise, current is then diverted away from the output. This action occurs at a very high speed, typically within the first nanoseconds. Furthermore, the thermal capacity of these semiconductor components, along with the use of specialized heat sinks, allows it to withstand repeated ESD pulses.Advantages of SMCJ40ATR
One key advantage of using SMCJ40ATR is its ability to withstand higher temperatures, as it can operate in temperatures up to 175°C. This is very beneficial in automobile applications as high temperatures are often encountered in such conditions. Additionally, it provides a high level of ESD and EMC protection which is essential in industrial and military applications. Moreover, SMCJ40ATR is very low-on-resistance and has low peak clamping voltage which makes it ideal for many applications. Finally, its small package size makes it a more attractive device for many electronic projects.Conclusion
In conclusion, SMCJ40ATR is an excellent choice for applications which require a high degree of ESD and EMC protection due to its impressive features and specifications. It also offers great performance in high temperature environments, making it the perfect solution for many automotive, industrial and military applications. In addition to its features and benefits, its low cost and easy availability make it a great choice for a wide range of projects and applications.

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