V661DHB34

Varistor Voltage (Typ):	1.05kV
Package / Case:	Square 34mm, Tabs
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 85°C (TA)
Capacitance @ Frequency:	2000pF @ 1MHz
Number of Circuits:	1
Energy:	900J
Current - Surge:	40kA
Varistor Voltage (Max):	1.155kV
Series:	DHB34
Varistor Voltage (Min):	945V
Maximum DC Volts:	850V
Maximum AC Volts:	660V
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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V661DHB34 Application Field and Working Principle

Varistors, also known as Metal Oxide Varistors (MOVs), are voltage-dependent, non-linear resistors which protect electronic circuits against transients and surges caused by electrostatic discharges, load changes, lightning, capacitor switching, or induced transients. The V661DHB34 is a 2-terminal 11 mm MOV with a rated current of 18 kA and a clamping voltage of 2.2 V. It offers superior protection against transient and surge voltages, and is suitable for applications such as automotive electronics, industrial systems, home appliances, and consumer electronics.

Applications of V661DHB34 Varistor

The V661DHB34 is used in various applications. It is used in automotive electronics to protect against electrical noise created by switching circuit inductances or capacitor leakage. It is used in industrial systems to protect against different types of transients, and in home appliances to protect against voltage surges caused by power outages. It can also be used to protect consumer electronics from voltage spikes.

Principles of Operation

The V661DHB34 works on the principle of temperature-dependent non-linear resistance. When exposed to a voltage across its terminals, the device adjusts its resistance based on the amount of current being drawn. The resistance is higher when the voltage is low and decreases when the voltage exceeds the device’s rated voltage. This change in resistance causes the voltage at the device terminals to remain constant, protecting the device from damage. The V661DHB34 also utilizes a built-in temperature sensing element to protect itself from thermal overloads. The temperature sensing element triggers a change in resistance when the temperature of the device exceeds the rated temperature. This change in resistance prevents the temperature from rising further, thus protecting the device from thermal damage. The device is also able to absorb a certain amount of energy during the surge protection process. Energy is dissipated from the device in the form of heat and is subsequently dissipated to the environment. This helps to reduce the severity of surges and transients to levels that the device can handle without damage.

Advantages of V661DHB34 Varistor

The V661DHB34 has several benefits over other MOVs. It has a high voltage rating, which allows it to protect against higher voltage spikes. It has a low resistance when exposed to low voltages, allowing it to provide protection at low levels as well. It has a fast response time, allowing it to provide protection quickly. It is also able to handle large amounts of energy without damage. Finally, it is reliable and durable, allowing it to provide consistent protection for its rated lifetime. In conclusion, the V661DHB34 is a powerful and reliable MOV suitable for many applications. Its fast response time and high voltage rating make it well-suited for applications involving electrical noise, transients, and voltage surges. Its low resistance and ability to handle large amounts of energy make it an ideal choice for protecting devices from damage.

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