A pre-charge resistor is a device that slowly charges the capacitors inside a electronic speed controller before it is powered up. Without this resistor, closing the contactor would generate a large amount of inrush current causing the contacts to arc. This arcing can permanently weld the contacts in the "on" position. The inrush current from not pre-charging can also cause the contact tips to get pitted resulting in a poor connection and diminish vehicle performance.
| Availability | No |
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| Country of Manufacture | Mexico |
For assistance with selecting the right components for your project, please use the appropriate form:
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Land Vehicle Worksheet |
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Marine Craft Worksheet |
