[Dprglist] Circuit Breakers

David Ackley dackley at verizon.net
Fri Nov 20 18:49:31 PST 2020


Be careful. Remember that these circuit breakers and not very fast. 
Looking at the datasheet these 5A circuit breaker "worst case" could take as
long as 30 seconds to trip with a 10A load and "best case" it will trip in 4
seconds with a 10A load.

Dave Ackley

-----Original Message-----
From: DPRGlist [mailto:dprglist-bounces at lists.dprg.org] On Behalf Of Murray
Altheim via DPRGlist
Sent: Thursday, November 19, 2020 10:45 PM
To: dprglist at lists.dprg.org
Subject: [Dprglist] Circuit Breakers


In our last videoconference on Wednesday we discussed the importance of
having a system-level fuse, so that if we short out a motor or a battery
things don't quickly go south. With most batteries that can start a fire,
with lithium-polymer batteries that can result in an explosion.

Rather than using a fuse (which would be fine) I was pretty sure I'd seen
some small circuit breakers. Sure enough, there's an automotive style, mini
blade circuit breaker that fits into a standard socket ("conforms to SAE
J553 standard"), pretty cheap too. They seem to come in various amp and
voltage ratings, and come in push-to-reset and automatic-reset versions.

At Digikey there's a series from OptiFuse, e.g.:

   28V 5A

   28V 7.5A

   28V 10A

with the link from OptiFuse themselves at:


Hope that's of some help,


Murray Altheim <murray18 at altheim dot com>                       = =  ===
http://www.altheim.com/murray/                                     ===  ===
                                                                    = =  ===
     In the evening
     The rice leaves in the garden
     Rustle in the autumn wind
     That blows through my reed hut.
            -- Minamoto no Tsunenobu

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