ERZ-E11E221

Varistor Voltage (Typ):	220V
Package / Case:	Disc 13mm
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 85°C (TA)
Capacitance @ Frequency:	660pF @ 1kHz
Number of Circuits:	1
Energy:	78J
Current - Surge:	6kA
Varistor Voltage (Max):	242V
Series:	ZNR®
Varistor Voltage (Min):	198V
Maximum DC Volts:	180V
Maximum AC Volts:	140V
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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ERZ-E11E221 application field and working principleTVS (Transient Voltage Suppressors) technology has been successful in protecting the sensitive electronic components from electrical transients. This protection is provided by limiting the overvoltage and providing an alternate conduction path for it to be dissipated safely. This type of overvoltage protection is provided by Varistors, MOVs and Gas discharge tubes. ERZ-E11E221 is an overvoltage protection device which falls under MOVs and thereby provides superior protection against transients for the sensitive components. This article covers the application field and working principle of ERZ-E11E221. The ERZ-E11E221 belongs to Varistors family and thus performs the same duty of preventing the damage to sensitive electronic components due to the overvoltage. It is a two-electrode overvoltage protection device which comes in the form of cylindrical shape and consists of zinc oxide pellets. These zinc oxide pellets contain reverse parallel connection of non-inductive resistors and semiconductors in order to protect the device from the current, which the electrostatic discharge or ESD produces on the lines. This MOV works for both AC and DC. In AC circuits, it limits the overvoltage or surge by dissipating the sudden voltage spike in the form of heat. This limits the voltage across the device and thereby protects other devices from damages. In DC circuits, the device acts as the clamping circuit to protect the circuit from the surge or ESD. The device will clamp the voltage as soon as it reaches the trigger voltage level thus limiting the Current flow. One of the main advantages of using ERZ-E11E221 is that, it provides the same protection over a wide range of operating voltages, and it is capable of protection up to 1000V. Another main advantage of this device is that, it has an excellent thermal shock resistance which is important when subjected to thermal shock during operation in the application. This in turn increases the operational lifetime of the device. ERZ-E11E221 broad application field includes:* Automotive applications: ERZ-E11E221 is used in automotive applications for providing overvoltage protection to delicate components used in the system. This includes, the ECU (Electronic Control Unit) which controls the various functions of the car, the GPS navigation, door locks, air conditioner, radar systems and other complex subsystems.* Medical applications: This device is also used in medical applications which require a reliable overvoltage protection device, in order to prevent damages to the sensitive medical equipment from sudden voltage surges. * Home appliances: ERZ-E11E221 is used in appliances such as, televisions, washing machines, fans, and microwaves for providing the required overvoltage protection from sudden voltage spikes or ESD. * Telecommunication equipment: This device is also used in telecommunication equipment to protect delicate components used in the systems. This includes, the base station antennas and radios used in cellular communications.Finally, the ERZ-E11E221 is a popular overvoltage protection device used for protecting sensitive electronic components from electrical transients. It is very easy to install and provides reliable protection over an extended period of time. The device is capable of handling both AC and DC applications and has proven to be highly reliable in numerous industrial and home applications.

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