Basis for hot wire testIEC 60695-2-10(Corresponding to the domestic standard GB/T 5169.10), the core is to simulate the high-temperature heat source generated by overload and short circuit of internal components of electronic products, and assess itNon metallic material componentsThe flame resistance and ignition resistance of the material prevent the spread of flames and fire after ignition.
The electronic products that require this experiment cover multiple fields such as consumer electronics, industrial electronics, and automotive electronics. The core judgment principles are:Non metallic components in the product that come into contact with a fire source or are easily ignited by high-temperature heat sources must be testedThe specific classifications are as follows:
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consumer electronics
This type of product is closely related to daily life, and the risk of fire is directly related to personal safety. The hot wire test for non-metallic components is a mandatory compliance item:
Small portable devices: phone, tablet, power bank casing, battery compartment insulation, charging interface sealing ring; The shell and cable sheath of Bluetooth earphones.
Household electronic devices: routers, set-top boxes, smart speaker casings, internal insulation brackets, button panels; Insulated components and plastic casing of temperature controllers for small household appliances such as electric irons and rice cookers.
Audio and video equipment: the outer shell frame and internal circuit board insulation gasket of the television; The non-metallic components and insulation sleeves of the audio box and wiring terminals.
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Industrial and Commercial Electronic Products
There are long-term high load operating conditions in industrial scenarios, with a higher risk of component overheating and stricter requirements for flame resistance
Industrial control equipment: non-metallic panels on the outer shell of PLC control cabinets, relay insulation bases, cable trays; The cooling fan blades and insulation partitions of the frequency converter.
Commercial terminal equipment: ATM machine operation panel, non-metallic components of cash box; Plastic parts of vending machine cabinets and lampshades for indicator lights; The shell of the charging station and the insulated handle of the charging gun.
Communication equipment: non-metallic cover plates and internal insulation brackets for outdoor chassis of base stations; The casing and interface sealing components of fiber optic transceivers.
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Vehicle mounted and rail transit electronic products
The car environment is enclosed and the temperature is high, posing great fire hazards. Non metallic components must pass the hot wire test
In car electronic devices: housings for in car navigation and driving recorders, insulation components for circuit boards; The shell and wire sheath of the car charger.
Rail transit equipment: display screen housings and indicator light lampshades inside subway carriages; Non metallic panels and internal insulation components of the gate.
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Security and Lighting Electronic Products
Security equipment operates 24 hours a day, and lighting equipment itself has heating elements. Flame resistance test:
Security equipment: non-metallic components such as the casing and protective cover of surveillance cameras; The shell of the alarm and the insulation components of the sensor.
Lighting equipment: housing, lampshade, and insulation components of LED lamps; The shell and internal circuit insulation sleeve of emergency lighting fixtures.
The hot wire testKey judgment indicatorsAfter the material is ignited by the hot wire, the flame extinguishing time is ≤ 30s, and the droplets cannot ignite the degreased cotton below.
Situations that do not require testing: pure metal components, inorganic high-temperature resistant materials such as ceramics; Non metallic decorative parts that are far away from high-temperature heat sources and will not ignite (determined by distance).