Low-voltage fuses — the most fundamental form of overcurrent protection in electrical systems — are widely traded components used across consumer electronics, automotive, industrial controls, and building wiring applications. The US schedule distinguishes glass cartridge fuses (8536100020) from all other types (8536100040), a material-and-construction split that captures the dominant cartridge form factor separately from blade, ceramic, and specialty fuse designs. Mexico is the leading supplier, followed by China and Japan; goods from China are subject to Section 301 tariff measures, which has driven sourcing diversification toward Mexico and the Philippines. Volume and current rating are the key specification parameters that buyers and customs brokers should document carefully.

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