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I’m designing a 12V battery powered system and I’m using a PCB-mounted blade fuse holder (XFCN T508VS). It looks like a standard ATO/ATC fuse clip type.

I just want to confirm I understand it correctly:

  • The holder uses two independent metal contacts? The image isn't very convincing.

Also, I plan to use standard ATO 10A automotive blade fuses (not mini or micro) like this: enter image description here

Seam to me really too big for the holder.

Can someone confirm if this is the correct interpretation and compatible fuse type for this kind of PCB holder?

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    \$\begingroup\$ Datasheet shows using two at given spacing. What exactly is the problem? || SMT terminals are not very reliable for something of this size and strength; are you sure this is a good choice? \$\endgroup\$ Commented Apr 15 at 3:58
  • \$\begingroup\$ Thank you for bringing that up; I'll probably look for a better one for PCB, but one that's still inexpensive. \$\endgroup\$ Commented Apr 15 at 4:47
  • \$\begingroup\$ Just a word of warning that cheap no-brand automotive fuses are often way out of spec. So if it is important that the fuse operates at a specific current, (destructively) test it. \$\endgroup\$ Commented Apr 15 at 12:43
  • \$\begingroup\$ @jpa more like destructively test them - many of them in fact so you have a representative sample \$\endgroup\$ Commented Apr 15 at 12:57
  • \$\begingroup\$ this could be more suitable fusesholder.com/photo/… \$\endgroup\$ Commented Apr 15 at 17:43

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It's essentially identical to this Keystone part:

enter image description here

You would use the L = 19.04mm spacing for the larger ATOF fuses.

I concur with Tim's concerns about the robustness of SMT terminals in this sort application. Particularly if you anticipate any possibility that end users might attempt fuse replacement.

The same manufacturer makes a through-hole socket part number XF-509P.

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  • \$\begingroup\$ I feel stupid now, I had imagined the two pins going into the holder shown in the picture. We need two of those, one for each pin! This is the first time I've included a fuse holder in my designs. Thanks! \$\endgroup\$ Commented Apr 15 at 4:43
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    \$\begingroup\$ Where I've seen similar terminals used for user-replaceable fuses, the PCB has been mounted just inside a housing, with the fuses sticking out through a slot small enough that it stops the fuse being used to lever the terminals off the board \$\endgroup\$ Commented Apr 15 at 12:55

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