Fax : 86-755-86229508
Address: The 3rd Industry Zone, Yanchuan, Songgang, Baoan District, Shenzhen, Guangdong, China
1、Good heat-durability. low temperature coefficient, low noise, high load power . 2、Operating ambient temperatur: -55℃~+275℃ . 3、 Surface is nonflammable ,t he 1/ 4 W~6W coating is gay white and indicate the resistance value by color ring; the 7W or voer will indicate the resistance value by...
1、Good heat-durability. low temperature coefficient, low noise, high load power.
2、Operating ambient temperatur: -55℃~+275℃.
3、Surface is nonflammable ,the 1/4W~6W coating is gay white and indicate the resistance value by color ring; the 7W or voer will indicate the resistance value by lettering and coats green.
A、High heat exchanged Ceramic core.
B、Nickel Chrome or nickel an copper alloy.
D、Sillicon resin coating.
F、Tinned copper lead wire.
Rated Power Derating Curve：
Dimensions and Voltage Performance：
Max. working voltage
Test the resistance value at normal temperature and normal temperature added 100℃,calculate per℃ resistance value change rate .
Short time overload
1/4~4W: According 5 times rated voltage, 5~10W: According 10 times rated power to account the voltage or Max.overload voltage (get the lower) for 5 seconds.
10000±200次。At 4 × rated voltage or Max. pulse overload voltage (get the lower) cycle 10000±200 times(1 second on, 25 seconds off ).
Resistance to soldering heat
Immerge into 350±10℃ tin stove for 2~3 seconds.
Immerge into 245±3℃ tin stove for 2~3 seconds.
The area of soldering is over 95%
At -55℃ for 30 min, then at +25℃ for 10~15 min, then at +125℃ for 30 min, then at +25℃ for 10~15 min, total 5 cycles.
Load life in humidity
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℃ and 90~95% relative humidity.
Load life in heat
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℃.
Respectively load AC voltage by 5、10、16 times rared power for 5 minutes.
No visible flame
PakHeng Electronics is one of the leading Wirewound Fixed Resistors manufacturers and suppliers in China, offering the free sample and competitive price. Welcome to wholesale the high quality bulk resistors made in China from us. It if of good performance and high safety.