The Bourns MF-R050-2-99 is a 60V, 500mA PTC resettable fuse designed for circuit protection. It features a radial, disc package with through-hole mounting.
The Bourns MF-R250 is a polymeric PTC resettable fuse rated for 30V max voltage and 2.5A hold current. It features a radial through-hole package with 5.10mm lead spacing.