Author Topic: Siglent SPD3303X-E fuse ratings  (Read 466 times)

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Offline R-1125FTopic starter

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Siglent SPD3303X-E fuse ratings
« on: January 26, 2023, 08:06:36 pm »
I am working on a Siglent SPD3303X-E power supply.  There are a couple of blow fuses.  Parts are labeled on the board F101, F201, and F301.  Of course, the rating is not visible and I would like to get replacements before I start taking it apart.  The fuses are a real pain to replace.  Could someone tell me the ratings for the fuses on the power board?
 

Offline tautech

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Re: Siglent SPD3303X-E fuse ratings
« Reply #1 on: January 26, 2023, 09:28:19 pm »
Service manual is available here but after a scan through it there doesn't seem to be any specs for the fuses:
https://www.siglenteu.com/wp-content/uploads/dlm_uploads/2019/07/SPD3000X-Series-Service-Manual.pdf

I have a control PCB that just has F1 a leaded 6.3A fuse clearly marked on one end.
Time to get out a magnifying glass ?
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Offline R-1125FTopic starter

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Re: Siglent SPD3303X-E fuse ratings
« Reply #2 on: January 26, 2023, 11:46:34 pm »
I have the service manual.  It's too bad they left out that little bit of information.  I have another SPD3303X-E open here and used a microscope to look at the fuses.  The fuses on the power board appear to be all 6.3A.  F101 and F301 are definitely marked 6.3A.  I can't get a good look at F201 but I think it's the same.
 

Offline tautech

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Re: Siglent SPD3303X-E fuse ratings
« Reply #3 on: January 26, 2023, 11:57:47 pm »
I have the service manual.  It's too bad they left out that little bit of information.  I have another SPD3303X-E open here and used a microscope to look at the fuses.  The fuses on the power board appear to be all 6.3A.  F101 and F301 are definitely marked 6.3A.  I can't get a good look at F201 but I think it's the same.
F201 should be for ch2 and therefore be same as ch1.
Trace the wiring for confirmation.
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Offline R-1125FTopic starter

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Re: Siglent SPD3303X-E fuse ratings
« Reply #4 on: January 27, 2023, 03:30:04 am »
I agree.  I think all the soldered-in fuses are 6.3A.
 


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