V661NA34

Varistor Voltage (Typ):	1.05kV
Package / Case:	Square 34mm
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 85°C (TA)
Capacitance @ Frequency:	2000pF @ 1MHz
Number of Circuits:	1
Energy:	900J
Current - Surge:	40kA
Varistor Voltage (Max):	1.16kV
Series:	NA
Varistor Voltage (Min):	940V
Maximum DC Volts:	850V
Maximum AC Volts:	660V
Moisture Sensitivity Level (MSL):	--
Part Status:	Obsolete
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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V661NA34 Application Fields and Working PrincipleTVS or transient voltage suppressors, also known as varistors, MOVs, are essential components of electrical circuits. They are designed to swiftly clamp down and snuff out any excessive voltage before it can cause harm to sensitive circuitry. This type of voltage regulator uses a large resistor or metal oxide varistor (MOV) to provide a path to ground for any stray high voltage, and to limit the peak energy that may be transferred from one part of the circuit to another. This article will discuss the application fields and working principle of the V661NA34 transient voltage suppressor.The V661NA34 is a quadrant, quadrant dual-in-line package (DIP) of transient voltage suppressor with a wide operating temperature range of -55°C to +125°C and a non-repetitive peak pulse power dissipation of 400 watts (W). It provides discrete level protection against electrical surges, electrostatic discharge (ESD), and overvoltage occurrences in electronic systems. The V661NA34 features two separate protectors, one for each line of the circuit, as well as two indicator diodes which will alert the user to any overvoltage situations.When the system passes the design current to the selected port, the current will flow from the positive port of the chosen protectors to the negative port of the same protectors. This process will create an electric field (EF) across the MOV, and this electric field will induce a negative charge into the MOV. This negative charge will reduce the voltage across the MOV, thus reducing the voltage to a safe level. Because the current is below a certain level, this will result in the MOV being self-restoring, and the protector will go back to its normal state.The V661NA34 protector works with lightning waveforms to prevent the transmission of overvoltage levels to downstream components. It uses a Thyristor Theory of Direct Protection (TTDP) and a Nonstop Voltage Suppression Technique, so it’s also called a NDV (Non-Direct Voltage) suppressor. When the overvoltage is detected in the input line, the controller will start to react quickly and clamp down the electric field so that it can be released safely via the external ground. The device features a unique K1of™ blocking technology that provides improved protection against extremely high voltages.The V661NA34 is recommended for use in communications equipment, including cable and satellite systems, as well as automotive and commercial systems. It provides excellent protection against spikes, surges, ESD, and overvoltage situations. The device is also widely used in industrial and medical equipment due to its ability to endure adverse temperatures and its self-restoring feature.In conclusion, the V661NA34 is an ideal solution for transient voltage protection. It offers superior protection against lightning waveforms and excessive voltage spikes and surges. With its wide operating temperature range, excellent protection features, and self-restoring capability, the V661NA34 is an essential part of any circuit design.

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