LFTVS18-1F3 Circuit Protection

Current - Peak Pulse (10/1000µs):	1A (8/20µs)
Base Part Number:	LFTVS18
Supplier Device Package:	4-FlipChip (0.77x0.77)
Package / Case:	4-UFBGA, FCBGA
Mounting Type:	Surface Mount
Operating Temperature:	--
Capacitance @ Frequency:	175pF @ 1MHz
Applications:	General Purpose
Power Line Protection:	No
Power - Peak Pulse:	350W
Series:	LFTVS, TRANSIL™
Voltage - Clamping (Max) @ Ipp:	19V
Voltage - Breakdown (Min):	16V
Voltage - Reverse Standoff (Typ):	12V
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 Suppressor (TVS) diodes are a unique type of diode designed for protection against electrical transients and overvoltage conditions by diverting or clamping this transient energy away from sensitive components and circuit protection devices. These diodes are often used in AC/DC power supplies, audio/video equipment, telecommunications equipment, automotive, medical, military, and industrial applications.The LFTVS18-1F3 is a surge-protection diode specifically designed to protect against the effects of both large overvoltage spikes and slow waveforms. This diode is rated at 18V and has a reverse leakage of 400nA at 10V, and a dynamic capacitance of 1pF at 4V. It features a low turn-on voltage of 0.75V, a fast response time of 5ns, and very low clamping voltage of 11.8V with a 5 times 10μs pulse.The LFTVS18-1F3 can be used in two basic application fields. The first is electrical protection, where it is used to protect sensitive components and circuit boards from damage caused by transientvoltages. The second is power electronics, where it is used to suppress voltage transients and noise in automotive, medical, military, and industrial environments.In terms of working principle, the LFTVS18-1F3 utilizes the avalanche breakdown mechanism of the PN junction diode to quickly dissipate the overload energy and clamp the voltage. As the voltage across the diode exceeds a certain threshold, a avalanche breakdown effect occurs, resulting in a sharp rise in current which rapidly dissipates the transient voltage and clamps the voltage across the diode. This results in a drastic reduction in voltage, preventing sensitive components and circuits from becoming damaged due to high voltage transients.The LFTVS18-1F3 also features a reverse bias junction capacitance which eliminates the seasonal peak transition delays and smears the time magnitude of the transient. This provides better total surge current dissipation and makes the device more reliable. Additionally, it also has a low capacitance when reverse biased, which is essential for high speed, low noise operation.In conclusion, the LFTVS18-1F3 diode is designed to protect sensitive equipment from transient voltage spikes and waveforms. Its low turn-on voltage, fast response time, and low capacitance when reverse biased make it an ideal choice for electrical protection and power electronics applications.

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