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Fuses for 5350B input 2 [lower frequency input]

 

Hello group. Can anyone advise me the rating, and where to get, replacement fuses for the 525MHz channel input protection on a 5350B? The manual that I have has this information missing.
Thanking you for your consideration!.............................................................................................................................................................................................................Don C.
 

Hi Don,
In my SM J2F1 is listed as 0.125A 125V .281X.093 (hp number 2110-0301)

Br,
Askild


On Sun, Mar 1, 2020 at 6:47 AM donald collie <donaldbcollie@...> wrote:
Hello group. Can anyone advise me the rating, and where to get, replacement fuses for the 525MHz channel input protection on a 5350B? The manual that I have has this information missing.
Thanking you for your consideration!.............................................................................................................................................................................................................Don C.

 

Don,

If I¡¯m not mistaken, HP part number 2110-0301 crosses to a Littelfuse part number 0275.125 under their Picofuse product brand.? This fuse was obsoleted in 2007 along with many others in this product line.? Some other Littelfuse part numbers that are compatible and still available are:

0251.125 ¨C Picofuse II, 125V, 0.125A, very fast acting

0263.125 - Picofuse II, 250V, 0.125A, very fast acting

?

There are others but the remainder are time-lag or slow-blow types which are not recommended for inputs such as those found on test equipment.? You want rapid overload protection for the circuitry that lies behind the front panel connector.

?

If you Google the above part numbers you will find distributors that handle the fuses for prices much less than what HP/Agilent/Keysight will charge you for the very same device.

?

Greg
 

Thankyou Askild, and Greg. I have an inquiry in to one of the suppliers on eBay. Shipping showed as about $350 - I think this is a little too high, and might be an error ;). I have a 5350B on its way to New Zealand from Texas, so If I order the fuses soon, they should arrive about the same time. I`m hoping that the defective input 2 is just a blown fuse. Thanks for your responses.......................................................................................................................Don.

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