031302.5 is a Littelfuse 3AG fuse rated 2.5A for 250 V AC. It uses Time-Delay operation with 100 A @ 250 V AC; 10 kA @ 125 V AC interrupting capability, suited to supplementary protection for appliances, utilization equipment, components and internal circuits.
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For engineering cross-reference, Littelfuse 031302.5 pairs a 2.5A rating with 250 V AC in the 313 family. The 3AG Glass Cartridge Slo-Blo Fuse format uses Fuse holder / clip mounting and Nickel-plated brass end caps terminals, with 100 A @ 250 V AC; 10 kA @ 125 V AC fault-interruption data. Package detail: 3AG glass cartridge; 6.35 mm diameter × 31.75 mm cartridge length nominal. Typical applications include Supplementary protection for appliances, utilization equipment, components and internal circuits. Published standards/approvals reference UL/CSA/NMX 248-1 and 248-14. Slo-Blo 3AG glass cartridge fuse; catalog/base part; verify package suffix when ordering. Glass body with nickel-plated brass caps. Verify coordination, derating and final suitability against the current Littelfuse datasheet before design-in.
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