Timeline for Does it matter if a fuse is connected to the negative or positive terminal of a battery?
Current License: CC BY-SA 4.0
4 events
| when toggle format | what | by | license | comment | |
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| Jun 29, 2019 at 20:51 | comment | added | 比尔盖子 | @lucasgcb When the polarity is revered, the fuse may or may not be blown depending on your fault current, but very likely, the components are already destroyed even if the fuse does eventually blow. A slightly better way to protect your circuit from short circuit is connecting a power diode in reverse. When the polarity is reversed, the diode would be forward biased and conduct, shorting power and ground and blow the fuse, but you need to make sure the power rating of the diode is good enough and use a fast-acting fuse, so the fuse would blow before the diode is destroyed. | |
| Jun 28, 2019 at 18:57 | comment | added | Peter Bennett | @lucasgcb: the fuses won't protect against polarity reversals. | |
| Jun 28, 2019 at 10:48 | comment | added | lucasgcb | What if the battery was reversed on accident, do you think the other fuse would provide protection? | |
| Jun 27, 2019 at 20:51 | history | answered | Peter Bennett | CC BY-SA 4.0 |