VBUS05B1-SD0-G4-08 Circuit Protection

Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Type:	Zener
Bidirectional Channels:	1
Voltage - Reverse Standoff (Typ):	5.5V (Max)
Voltage - Breakdown (Min):	6V
Voltage - Clamping (Max) @ Ipp:	18V
Current - Peak Pulse (10/1000µs):	2.5A (8/20µs)
Power - Peak Pulse:	45W
Power Line Protection:	No
Applications:	General Purpose
Capacitance @ Frequency:	0.29pF @ 1MHz
Operating Temperature:	-55°C ~ 150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	0201 (0603 Metric)
Supplier Device Package:	CLP0603

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TVS diodes (transient voltage suppression devices) are energy-absorbing components designed to protect electrical equipment, such as circuit boards, from overwhelming voltage and current transients. In this article, we will examine the application field and working principle of VBUS05B1-SD0-G4-08, a 5-V Unidirectional Clamping Transient Voltage Suppressor (TVS) formally specified by National Semiconductor.Application FieldData and communication lines require protection against overvoltage transients and line surge events. VBUS05B1-SD0-G4-08 is specified for protecting data and communication lines against overvoltage transient events. It is a suitable choice for the clamping protection of telephone line, data line, signal line, bus line, multi-media interface, the protection circuits of modem, and so on.Operating PrinciplesVT01 is a unidirectional transient voltage suppressor (TVS). It is an inverse avalanche semiconductor device that absorbs a certain amount of energy in order to protect the circuits connected to it from externally sourced transient overvoltage events. It is a low capacitance device which clamps the high-frequency signals and transients.When the input voltage is higher than the specified voltage rating, the TVS device begins to conduct, limiting the voltage across itself and the connected load. The current rating establishes the clamping voltage of the device and controls the energy dissipation of the VBUS05B1-SD0-G4-08 device. The transient voltages are clamped at a predefined level, determined by the breakdown and avalanche current ratings of the device. The device will remain in a conduction state until the transient voltage falls below the breakdown voltage.Voltage clamping is obtained through the combined effects of the avalanche and zener breakdown characteristics. The device has good transient response characteristics. The maximum peak pulse current is determined by the breakdown current and the pulse duration is determined by the rate of energy build-up of the device.ConclusionIn summary, VBUS05B1-SD0-G4-08 is a 5-V Unidirectional Clamping Transient Voltage Suppressor (TVS) formally specified by National Semiconductor. It is a unidirectional transient voltage suppressor (TVS) ideal for protecting data and communication lines against overvoltage transient events from externally sourced electric and magnetic surges. It clamps the high-frequency signals and transients, limiting the voltage across itself and the connected load so that it is able to absorb a certain amount of energy in order to protect the circuits connected to it.

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