Metal Oxide    Varistors

 SMD Varistors                   Application            Curves             Characteristics             Dimension 

Device Ratings ......

Varistor are voltage dependent, nonlinear device which have an

electrical behavior similar to back-to-back zener diodes.

Zinc oxide varistor are nonlinear resistors, consisting main of zinc oxide

and several kinds of metal oxide additive.

They are bilateral and symmertrical V-I Characteristics curve and

 unparalleled large peak current capability are used for absorption of

 transient voltage, suppression of pulse noise and circuit voltage

 stabilization.

 Features @

Fast response

Excellent voltage ratio

High stabilization for circuit voltage

Unparalleled absorption for transient voltage characteristics

Bilateral and symmetrical V-I Characteristics curve

@
 Applications @

Surge Protection in consumer electronics                           

                    ---- industrial electronics

                    ---- telephone and telecommunication systems

                    ---- automobile equipments

                    ---- measuring and controller systems

                    ---- electronic home appliances      

                    ---- gas and petroleum appliances

 Related Standards

Absorption of switching surge from various kinds of relays and electro-magnetic valves.

Electrostatic discharge an spike noise suppression.

@

Protection of various kinds of transistors, diodes, ICs, thyristors, triac semiconductors, and etc.

Automobile control system such as transistorized ignition system and electronic fuel injection

     system, and etc.

 Specifications                                                            

Current, Energy and Power Derating Curve

Varistor Voltage Range ................................ 18  to 1800Vdc
Peak Current For 8/20 us Current Wave ....... 100 to  6500A
Energy Range For 10/1000us Current Wave..  0.4 to  625 Joul
Storage Temperature Range ....................... - 40 to  + 125C
Operation Ambient Temperature Range ...... - 40 to  + 85C
Typical Response Time ................................  < 25ns
Insulation Resistance ...................................   > 1000M