Order code 02161.25 identifies a 1.25A fast-acting 5×20mm ceramic fuse from Littelfuse; base catalog cartridge, with published series ratings and ordering-specific configuration.
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The Littelfuse 216 Series part 02161.25 provides a 1.25A rating with fast-acting 5×20mm ceramic fuse characteristics. The selected part uses base catalog cartridge. The full ordering code specifies base catalog cartridge, so package and lead details should be matched exactly. It is rated 250 V AC and the datasheet lists 1500 A @ 250 VAC interrupting capability. Nominal melting I²t is 0.48 A²s. Verify ambient derating, coordination and the exact manufacturer ordering code against the current Littelfuse datasheet before design-in.
TR1-1/4R
1.25A · 250 VAC / 250 VDC
MI5FAP25V1.25
1.25A · 250 VAC
MI5FA25V1.25
1.25A · 250 VAC
MI5FA40V1.25
1.25A · 400 VAC
GFN1-1/4
1.25A · 250 VAC
ATQ1-1/4
1.25A · 500 VAC
ATDR1-1/4
1.25A · 600 VAC / 300 VDC
A2D1-1/4R
1.25A · 250 VAC