GB/Z 5169.48-2024 is a guiding standard within the series of fire hazard tests for electrical and electronic products. It focuses on the equipment requirements, validation test methods, and practical guidelines for the hot-wire coil test, and is applicable for assessing the ability of materials and components to resist sustained local overheating ignition in scenarios with densely packed elements. The standard simulates local overheating scenarios using a nickel-chromium alloy hot-wire coil, with key metrics including the ignition time of the specimen and the duration of flame. The test requires specialized hot-wire coil test equipment (including a precise temperature control system), standard thermocouples, specimen clamping fixtures, timing devices, and a test chamber of specific volume. Parameters such as contact pressure and temperature must be strictly controlled, providing unified technical guidance for material selection and fire safety quality control in electrical and electronic products.