EPCOS Cross Customized Radial Leaded Standard SIOV Metal Oxide Varistor 14D511K ZOV VDR MOV With UL CUL VDE CSA ROHS

EPCOS Cross Customized Radial Leaded Standard SIOV Metal Oxide Varistor 14D511K ZOV VDR MOV With UL CUL VDE CSA ROHS

General

Ao littel Metal Oxide Varistors provide reliable and economical protection against high voltage transients and surges which may be produced, for example, by lightning, switching or electrical noise on AC or DC power lines. They have the advantage over transient suppressor diodes in as much as they can absorb much higher transient energies and can suppress positive and negative transients. When a transient occurs, the varistor resistance changes from a very high stand-by value to a very low conducting value. The transient is thus absorbed and clamped to a safe level, protecting sensitive circuit components. Varistors are manufactured from a non-homogeneous material, giving a rectifying action at the contact points of two particles. Many series and parallel connections determine the voltage rating and the current capability of the varistor.

General technical data

Climatic category to IEC 60068-1 40/85/56

Operating temperature to CECC 42 000 –40 … + 85℃

Storage temperature – 40 … +125℃

Electric strength to CECC 42 000 ≥2.5 kVRMS

Insulation resistance to CECC 42 000 ≥10 MΩ

Response time <25 ns

Application

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

Specification

Series List

Dimension(Unit:mm)

Select of fuse in conformity to ZOV Varistor

If confirm with diameter:

If confirm with Max.Peak Current:

How to Select a ZOV Zno varistor

For most applications,the selection have six processes:

1) Normal operating conditions of varistor

Varistor voltage: the voltage value under 1mA constant current test.

Select the ZnO with higher voltage.

A.C./D.C.: max.rms.or DC voltage.Select the max. Voltage equal or higher than the peak working voltage.

2) The transient energy absorbed by the ZnO

To determine the energy absorbed in the ZnO.,the following equation can apply:

E=K*IP*Vc*T

Where K is constant. K value are 1.0 for a rectangular waveform,1.4 for a 10/1000 us and 8/20 us waveform. And IP is the peak current applied, Vc is the clamping voltage which was current applied. T is the pulse width.