ERZ-SF2MK330

Series:	ZNR®
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Obsolete
Moisture Sensitivity Level (MSL):	--
Maximum AC Volts:	20V
Maximum DC Volts:	26V
Varistor Voltage (Min):	30V
Varistor Voltage (Typ):	33V
Varistor Voltage (Max):	36V
Current - Surge:	125A
Energy:	1.2J
Number of Circuits:	1
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount, MLCV
Package / Case:	2-SMD, J-Lead

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IntroductionThe ERZ-SF2MK330 is an axial-lead, Metal Oxide Varistor (MOV). It is used frequently as surge protection devices (SPDs) and transient voltage suppression (TVS) devices. The device has a wide range of applications in the field of electrical and electronic engineering. The device operates by rapidly short circuiting current surges, thus reducing the amount of energy which potentially destructive transients can deliver. It works by utilizing the Metal Oxide Varistor (MOV) material. The MOV material exhibits a near-linear, non-linear conductivity characteristic. This characteristic is illustrated by how, when exposed to an applied voltage exceeding a certain break point,the material will begin conducting current.VaristorA metal oxide varistor (MOV) is a non-linear, reactive semiconductor device. It is comprised of a ceramic core, metal compounds, and electrodes. When exposed to an applied voltage exceeding a breakpoint, the varistor will begin to rapidly conduct current, thus preventing an overvoltage from causing damage in the circuit.Working PrincipleThe Working Principle of the ERZ-SF2MK330 metal oxide varistor is based on the physical characteristic of the varistor material. This material is classified as a nonlinear semiconductor material which exhibits a near-linear, non-linear conductivity characteristic. This occurs when exposed to an applied voltage exceeding a certain break point. At this breakpoint, the MOV rapidly begins to conduct current, thus reducing the amount of energy which potential destructive transients can deliver.In operation, the applied voltage may initially result in a small current flow through the device, due to the near-linear conductivity characteristics of the MOV material. However, once the applied voltage reaches the break point of the MOV, the current flow begins to rapidly increase. This results in a significant reduction of the amount of energy the potential destructive transient can deliver. This process helps to protect the electrical and electronic devices that may be connected to it.The characteristics of the ERZ-SF2MK330 metal oxide varistor also allow for fast recovery of its blocking capability. This is an important factor for the protection of semiconductors in the circuit, as these devices are especially sensitive to overvoltage conditions.Application FieldThe ERZ-SF2MK330 is widely used in SPDs and TVS applications, especially in the automotive and home appliance industries. It is particularly used in high-frequency circuits, such as those found in mobile devices such as smartphones, as well as in HDD motors, DC-DC converters, and other high-speed electronics. It is also used in combination with a Gas Discharge Tube (GDT) for arc fault protection in AC mains.The device is also used in industrial applications, for instance, as a residual current device in the grounding system on portable generators. It provides additional safety measure by preventing voltage from reaching dangerous levels. The device can also be used in electric fence systems, UPSs, photovoltaic installations, railway systems, mining operations, and the protection of motors.ConclusionThe ERZ-SF2MK330 metal oxide varistor is a widely used surge protection and transient voltage suppression device. It works by utilizing the non-linear conductivity characteristics of the varistor material, which allow it to conduct current once an applied voltage reaches a certain break point. This enables the device to limit the amount of energy destructive transients can deliver. The device has a wide range of applications in the electrical and electronic engineering fields, particularly in automotive, home appliance, and industrial applications.

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