VDRS07H250BKE

Series:	VDRS
Part Status:	Active
Lead Free Status / RoHS Status:	--
Maximum AC Volts:	250V
Maximum DC Volts:	320V
Varistor Voltage (Min):	351V
Varistor Voltage (Typ):	390V
Varistor Voltage (Max):	429V
Current - Surge:	1.2kA
Energy:	33J
Number of Circuits:	1
Capacitance @ Frequency:	160pF @ 1kHz
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Through Hole
Package / Case:	Disc 9mm

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TVS (Transient Voltage Suppressors), MOVs (Metal Oxide Varistors), and VDRSs (Voltage Dependent Resistor Networks) are electronic components that offer protection and noise reduction in applications such as data ports, computer ports, power supplies, and other circuits. These components protect circuit board components from unexpected voltage spikes and unwanted signals. The VDRS07H250BKE is a metal oxide varistor device specified for use in protecting high speed data ports from electrostatic discharge (ESD) and other transient overvoltage events. This application note provides an overview of the VDRS07H250BKE device, its application field and working principle. It is designed to help the user better understand the characteristics of this varistor, and how it can be used to enhance the performance of data ports.The VDRS07H250BKE is a type of metal oxide varistor device specified for use in protecting high-speed data ports from electrostatic discharge (ESD) and other transient overvoltage events. It is designed to protect critical components from power surges and ESD, and has excellent transient performance. The VDRS07H250BKE is a disc-shaped component that consists of an anvil of aluminum oxide that has a uniform cross-section of approximately 0.25mm. It is rated for a nominal voltage of 250VDC and is rated to protect against overvoltage up to 1,000VDC (microseconds). This varistor has an ESD rating of 1,000 volts, which indicates that it is suitable for use in data port applications which require protection from ESD pulses. The VDRS07H250BKE has an operating temperature range of -40 to +85°C and an insulation resistance of at least 100MΩ. It provides excellent surge protection for data ports in home appliances, office equipment, consumer electronics, and automotive electronics. The working principle of the VDRS07H250BKE is based on the Zener breakdown effect of a metal oxide. When a surge voltage is applied to the varistor, the metal oxide layer is subjected to a high electric field. This high electric field causes electrons to tunnel across the metal oxide layer creating an avalanche breakdown effect. This results in a highly conductive path and a reduction of the voltage across the varistor. When the surge voltage is removed, the electrons diffuse back into the metal oxide layer and the resistance of the varistor returns to a high value, thus preventing further leakage current. The VDRS07H250BKE is designed to offer excellent protection against high voltage spike up to 1,000 VDC in microseconds. Overall, the VDRS07H250BKE varistor offers good mechanical and electrical characteristics in a disc form factor. It provides exceptional performance over a wide temperature range of -40 to +85°C. This makes it an ideal choice for applications where reliable protection is required from electrostatic discharge and transient overvoltage events. The VDRS07H250BKE is a cost-effective solution and is an important part of any system requiring data port protection.

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