Product Details
Place of Origin: Zhejiang,China(Mainland)
Brand Name: YONGDE
Certification: ISO9001/KEMA
Model Number: D28
Payment & Shipping Terms
Minimum Order Quantity: 1pcs
Price: negotiation
Packaging Details: carton
Delivery Time: 20 working days after received your payment
Payment Terms: T/T or western Union or L/C or PayPal, MoneyGram, D/P, D/A
Supply Ability: 30,000pcs per month
Genre: |
Metal Oxide Varistor |
Use: |
Surge Arrester |
Function: |
Protection |
Diameter: |
28mm |
Color: |
Silvery Gey |
Genre: |
Metal Oxide Varistor |
Use: |
Surge Arrester |
Function: |
Protection |
Diameter: |
28mm |
Color: |
Silvery Gey |
Lightning Arrester Metal Oxide Varistor of High Voltage
Product Description:
The Metal Oxide Film Resistor contains a ceramic mass of zinc oxide grains, in a matrix of other metal oxides (such as small amounts of bismuth, cobalt, manganese) sandwiched between two metal plates (the electrodes). The boundary between each grain and its neighbour forms a diode junction, which allows current to flow in only one direction.
The mass of randomly oriented grains is electrically equivalent to a network of back-to-back diode pairs, each pair in parallel with many other pairs.[3] When a small or moderate voltage is applied across the electrodes, only a tiny current flows, caused by reverse leakage through the diode junctions. When a large voltage is applied, the diode junction breaks down due to a combination of thermionic emission and electron tunneling, and a large current flows. The result of this behaviour is a highly nonlinear current-voltage characteristic, in which the MOV has a high resistance at low voltages and a low resistance at high voltages.
Specifications:
D28 Metal Oxide Varistor(MOV):
| Type | D28 Metal Oxide Varistor(MOV) |
| Specification mm | D28*24 |
| Voltage Gradient V/mm | 210~235 |
| Square Wave Test Valve | 200 |
| 4/20μ S High Current Withstand kA | 65 |
| 8/20μ S high current withstand kA | 10 |
| DC1mA Refering Voltage kV | 5.3 |
| 0.75Times U1mA Leak current μ A < | 10 |
| Residual Votage Ratio | 1.88 |
| Aging Load Point Ratio% | 85 |
About us:
Yongde holds the quality policy of being 'the technical forerunner, supreme in quality, supremacy of customers, and innovative progressing', so that our products and services successfully satisfied our users. We warmly welcome friends and customers from home and abroad to contact for exchanges and corporations. We also welcome feedbacks from our user communities.
