RFX21-T low-power full-short-circuit resistors

Product Features

• Good lightning - surge resistance (1KV - 4KV), with no hidden dangers of circuit - board burning and shell fusing.

• Cut off and protect the circuit when the line is abnormal, and has an over - temperature protection function.

• Low fusing current (1.5 - 2 times the rated current), and low surface heat during fusing.

Applications

• Applied in various high - power switching power supplies, lightning protection modules, home appliances, smart home control boards, lighting, power strips, and all kinds of protection circuits.

Dimensions (mm)

Technical Parameters

Half - short - circuit Characteristics

• Meets the Huawei primary - side half - short - circuit test standard: Connect a 100Ω (high - power external connection) simulated resistor in parallel between the high - voltage circuit and the primary - side ground. Set the input voltage so that the current flowing through the fuse resistor (wire) is the rated current, and start the power - on aging. Observe the changes of the outer shell until no new abnormal phenomena occur. Then, increase the voltage by 2V each time for point - by - point testing to confirm the situation of the outer shell until the fuse resistor (wire) fuses within 1S, and the charger should not have the phenomenon of melting through the shell.

• Meets the primary - side half - short - circuit test standards of customers such as Xiaomi, ZTE, Lenovo, and FiberHome.

Main Test Items, Methods and Performance Requirements