Order code 02131.25HXP identifies a 1.25A time-lag 5×20mm glass fuse from Littelfuse; cartridge, hxp bulk packaging, with published series ratings and ordering-specific configuration.
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For designs centered on 1.25A overcurrent protection, 02131.25HXP belongs to the Littelfuse 213 Series. The selected part uses cartridge, hxp bulk packaging. The full ordering code specifies cartridge, hxp bulk packaging, so package and lead details should be matched exactly. It is rated 250 V AC and the datasheet lists 35 A @ 250 VAC interrupting capability. Nominal melting I²t is 27.15 A²s. Verify ambient derating, coordination and the exact manufacturer ordering code against the current Littelfuse datasheet before design-in.
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