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MOV vs. DIODE Characteristics |
| Characteristics |
MOV |
Diode |
| Energy |
Higher |
Lower |
| Clamping |
Higher |
Lower |
| Polarity |
Bipolar only |
Unipolar & Bipolar |
| Capacitance |
1 to 4nF |
100pF to 3nF |
| Standoff Voltage |
Medium to High |
Low to Medium |
| Leakage Current |
Higher |
Lower |
| Screening |
Limited |
Extensive JAN TX/TXV/S |
| Cost |
Lower |
Higher |
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Attributes of Popular Transient Voltage Suppression MOV & Diode
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| Advantages |
* Typically fail as an open circuit * Wide Range of Breakdown Voltages |
* Fast response time (<1ns) * Low clamping Voltage |
| Disadvantages |
* Inherent bipolar clamping * Single layer MOV have limited life |
* Limited power capability * Typically fail as an short circuit * Power rating decreases with temperature |
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