[Dprglist] Circuit Breakers

[Murray Altheim]

Wow, thanks Dave. Good to notice that, as while I could try to use a lower
amperage (maybe 5A) that's still a very long time. Maybe I'll settle for a
fast blow 10A fuse, which would actually be better since I'm unlike to get
near 10A absent a real failure or short. I could still use those automotive
fuse sockets for convenience' sake.

Cheers,

Murray

On 21/11/20 3:49 pm, David Ackley via DPRGlist wrote:
> Hi
> 
> 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
> 
> Hi,
> 
> 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
>     https://www.digikey.com/en/products/detail/optifuse/MRCBP4-PM-5A/11581894
> 
>     28V 7.5A
>   
> https://www.digikey.com/en/products/detail/optifuse/MRCBP4-PM-7-5A/11581669
> 
>     28V 10A
>   
> https://www.digikey.com/en/products/detail/optifuse/MRCBP4-PM-10A/11577680
> 
> with the link from OptiFuse themselves at:
> 
>     https://www.optifuse.com/circuit-breakers-Type2-mocbp4-pm.php
> 
> Hope that's of some help,
> 
> Murray
> 
> ..........................................................................
> 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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-- 

...........................................................................
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