SMAJ40C

Voltage - Clamping (Max) @ Ipp:	67.73V
Supplier Device Package:	DO-214AC (SMA)
Package / Case:	DO-214AC, SMA
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Capacitance @ Frequency:	--
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	400W
Current - Peak Pulse (10/1000µs):	6.2A
Series:	SMAJ
Voltage - Breakdown (Min):	42.08V
Voltage - Reverse Standoff (Typ):	40V
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: SMAJ40C Application Field and Working Principle

Transient Voltage Suppressor (TVS) diodes are semiconductor devices that provide overvoltage protection or regulation in a variety of electronic circuits. The SMAJ40C TVS diode is the latest generation of high-performance, ultra-low capacitance TVS diodes. This article examines the application field and working principle of the SMAJ40C TVS diode.

Application Field

The SMAJ40C TVS diode is a single-line protection device designed for use in a wide variety of applications. It can be used to protect sensitive electronic equipment and components from electrical transients, such as in automotive, consumer, home appliance, industrial, and medical circuitry. It is also suitable for high-speed signal lines, such as Ethernet, USB ports, and wireless charging circuits.The SMAJ40C provides conduction current up to 3A and clamping voltage up to 39V, making it is suitable for automated assembly and surface mount technology. Its small package size and low capacitance make it well-suited for high-speed data-line applications, such as HDMI, DP, and Thunderbolt. It is also UL recognized and RoHS compliant, making it a reliable and environmentally friendly choice.

Working Principle

The SMAJ40C TVS diode is designed to be a bidirectional device. This means that it protects against voltage transients on both the start and end sides of the circuit. It operates on the principle of avalanche breakdown, in which a high electric field strength causes electrons to carbonate rapidly along the surface of the diode. This results in a large current flowing through the diode, which is then dissipated to ground.The performance of the SMAJ40C TVS diode is heavily influenced by its capacitance. Its ultra-low capacitance allows it to protect against voltage transients that can be especially damaging to high-speed data lines, while also providing stable switching performance. The device also features an ultra-fast response time, allowing it to react almost instantly to voltage transients and protect the circuit from damage.

Conclusion

The SMAJ40C TVS diode is designed for a wide range of applications, from consumer electronics to industrial circuits. This makes it a reliable choice for protecting sensitive electronic equipment from overvoltage transients. Its ultra-low capacitance and fast response time make it well-suited for high-speed signal lines, while its small package size and RoHS compliance make it an environmentally friendly choice. All in all, the SMAJ40C TVS diode is a robust and reliable device with the power to protect sensitive electronic components from damaging voltage transients.

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