SMDJ26AHR7G

Voltage - Clamping (Max) @ Ipp:	42.1V
Supplier Device Package:	DO-214AB (SMC)
Package / Case:	DO-214AB, SMC
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 175°C (TJ)
Capacitance @ Frequency:	--
Applications:	Automotive
Power Line Protection:	No
Power - Peak Pulse:	3000W (3kW)
Current - Peak Pulse (10/1000µs):	71.3A
Series:	Automotive, AEC-Q101, SMDJ
Voltage - Breakdown (Min):	28.9V
Voltage - Reverse Standoff (Typ):	26V
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

Transient Voltage Suppressors (TVSs) are a type of protection solid-state devices, typically diodes, used to protect vulnerable electronics from over-voltage transients – such as lightning strikes or electrostatic discharge (ESD) – that can damage or even destroy delicate circuits; as well as a variety of other over-voltage events. The SMDJ26AHR7G is a Unidirectional High Speed TVS Diode, which is often used as a protection device in a variety of electronic circuit applications.

Application Field of SMDJ26AHR7G

The SMDJ26AHR7G is ideal for use in applications that require protection against transient voltage events, such as in telecommunications and networking systems, as well as automobile, aerospace, and other industrial and consumer electronics. It was designed for surge protection applications in order to protect devices from extreme over-voltage transients.

Working Principle of SMDJ26AHR7G

The SMDJ26AHR7G works on the principle of reverse breakdown. It has an integrated high speed epitaxial diode that provides over-voltage protection. It is designed to conduct large transient current, up to 36A in surges, and has a low capacitance of 0.4pF. The device has a high peak pulse power of 1200W.When a transient voltage is applied to the TVS diode, current can flow in only one direction, as shown in the figure below. The device will “breakdown”, or begin to conduct current, when the voltage applied is greater than the TVS diode’s breakdown voltage. When the breakdown voltage is reached, the diode will conduct the current applied, reducing the voltage to a level safe for the protected device. The TVS diode will then clamp the voltage to a level safe for the device, protect it from the over-voltage. The diode also has protection from ESD and EMI, suppressing any electrical noise or interference.

Conclusion

The SMDJ26AHR7G is a Unidirectional High Speed TVS Diode, designed for surge protection applications. It provides efficient protection to components against over-voltage transients, and can handle high current surges of up to 36A. The device has a low capacitance of 0.4pF, and a high peak pulse power of 1200W. It is suitable for use in a variety of electronic circuit applications, including those in automobiles, aerospace, and telecommunications. Its working principle is based on the reverse breakdown concept – when the breakdown voltage is reached, the device will clamp the voltage to a level safe for the protected component.

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