Manufacturer Part #
POWR-SPEED SQB SIZE 70 FLUSH METRIC 250A
Change Notification To PSR070, PSR071, PSRS072 & PSR073 Series Fuses This letter is to inform you of a design update that is being made to the fuse element for PSR Series ratings in case sizes 70 through 73. The new element design will be built with a thru-lay material made of silver and copper. The change will improve our supply chain efficiency and mitigate future cost increases. The change is internal to the fuse so there are no changes to the fuse's form, fit, function or published performance specifications and they will continue to meet all applicable UL and IEC standards. No changes are required to ordering part numbers and no changes are required to catalogs and datasheets.