High Power Ceramic Tube Wirewound Resistors

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Basic Info

Place of Origin:	China
Payment Type:	T/T

Product Description

1, Aluminum crust surface with good performance in heat radiation, suitable for cooling plate installation, can be used in the atrocious environment.
2, Small size, high power load.
3, High insulating capacity, Encapsulation by non-flame inorganic Material, good performance in vibarion.
4, Multi connecton form will be easily to fix.
5, Widly used in Power supply, Transducer, Elevator, Arena audio and high requirement equipment Industry.
6, Reisstance tolerance: ± 1%, ± 2%, ± 5%, ± 10%

Test Item	Performance	Test Condition
Temperature coefficient:	±350ppm/’C	Test the reisistance value at nomal temperature and nomal teperature added 100’C, calculate per ‘C resistance value change rate.
Short time overload:	*R ≤±(2%R0+0.05Ω)	According 10 times rated power to account the voltage (get the lower) for 5 seconds.
Resistance to soldering heat:	*R ≤±(1%R0+0.05Ω)	Immerge into the 350 ±10’C tin stove for 2~3 seconds.
Temperature cycling:	*R ≤±(1%R0+0.05Ω)	At -55’C for 30 min, then at +25’C for 10~15 min, then at +275’C for 30 min, the at +25’C for 10~15min, total 5 cycles.
Load life in humidity:	*R ≤±(5%R0+0.05Ω)	Overload rated voltage or Max. working voltage (get the lower) for 1000 hours (1.5 hours on and half-hour off) at the 40 ±2’C and 90~95% relative humidity.
Load life in heat:	*R ≤±(5%R0+0.05Ω)	Overload rated voltage or Max. working voltage (get the lower) for 1000 hours (1.5 hours on and half-hour off) at the 70 ±2’C.
Non Flammability:	No visible flame	Respectively load AC voltage by 5, 10, 16 times rated power for 5 minutes.

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