Single Disc 40D431K Metal Oxide Varistor MOV Surge Protection 40mm

Product Specification

High Energy Single Disc Metal Oxide Varistor 40D431K 40mm For Surge Protection

Definition Of The Metal Oxide Varistor 40D431K

AMPFORT High Energy Metal Oxide Varistors “D” & “S” Series The High Energy Series large tab-leaded varistors are designed to handle high peak currents and have the ability to absorb large amounts of energy. Available in round (D) and square (S) shapes to allow mounting in various spaces and in bare disc form intended for special applications requiring unique electrical contact or packaging methods provided by the customer. The electrode finish of these devices is solderable and can be used with pressure contacts. Bare Disc Products are also available for certain applications where discs of the same diameter may be stacked.

Metal oxide varistor (MOV or VDR) are voltage dependent resistors with symmetrical voltage-current characteristics which are designed to protect all kinds of electronic devices or elements from switching pulse or induced lightening surges. Its non linear characteristic with broad application range, mass production feasibility are gardually being used in various level of electric and electronic device from low to high voltages level protection (AC 11V to AC 1000V as available ranges).
The normal type of metal oxide varistor are radial lead varistors (MOV or VDR) that are designed to be used continuously across AC line primary or DC circuit for transient voltage and surge suppression.

Introduction Of The Metal Oxide Varistor 40D431K

VARISTOR is a polycrystalline ceramic body consisting of semi conducting zinc-oxide (ZnO) grains and second phase(Including) Bi2O3,Sb2O3, MnO, CoO, etc) Located at the joints of the grains, it’s called varistor (variable resistor)

Ø 40D Series Metal Oxide Varistor

Features Of The Metal Oxide Varistor 40D431K

■ No Derating Up to 85ºC Ambient.

■ Wide operating voltage (V1mA) range from 8 to 1,800V
■ Fast responding to transient over-voltage
■ Large absorbing transient energy capability
■ Low clamping ratio and no following-on current

■ Standard Disc Sizes 20mm, 25mm, 32mm,40mm, and 53mm diameter
■ Radial lead epoxy coated

■ Pressure Contacts and/or Disc Stacking May Be Utilized

■ Solderable Electrode Finish Options
■ Wide operating AC voltages ranging from 5Vrms to 1000Vrm
■ Wide operating DC voltages ranging from 6Vdc to 1465Vdc
■ Fast response time of less than 25ns
■ High surge current handling capability

■ Available Edge Passivation Insulation

■ Very High Energy Capability WTM 200J to 1,800J

■ Provided in Disc Form For Unique Packing by customer
■ RoHS and Reach compliant

Applications Of The Metal Oxide Varistor 40D431K

■ Transistor, diode, IC, thyristor or TRIAC semiconductor protection
■ Surge protection in consumer electronics
■ Surge protection in industrial electronics
■ Surge protection in electronic home appliances, gas and petroleum appliances
■ Relay and electromagnetic valve surge absorption

■ Power supply
■ Home appliance
■ Consumer electronics
■ Industrial equipment
■ Telecommunication or telephone system

Dimension Of The Metal Oxide Varistor 40D431K (mm)

General characteristics Of The Metal Oxide Varistor 40D431K

■ No radioactive material
■ Storage temperature: -55 to +125°C
■ Operating temperature: -55 to +85°C
■ Body: nickel plated
■ Leads: surface mounted
■ Axial devices: tin plated
■ Devices with no leads: nickel plated

Screw Mounting