200W 75ohm Aluminum Shell Resistor RXLG Used For Servo Brake Resistor
The 200W aluminum shell resistor is a high-power resistor made of high-quality aluminum alloy material. It uses an aluminum shell as the outer shell and combines a special process design to effectively solve the problems of high power dissipation and heat dissipation, ensuring good performance even in a long-term working environment. This product is widely used in industrial equipment, control systems, power transformers, automation equipment, testing instruments and other fields
Heat dissipation performance of resistors
The aluminum alloy shell itself has excellent thermal conductivity. Combined with the design of the heat sink and the optimized structural layout, the heat dissipation efficiency is significantly improved. Compared with traditional ceramic or metal resistors, aluminum shell resistors can dissipate heat more quickly under high-power loads, reduce temperature rise and extend the service life of equipment.
The heat dissipation advantages of aluminum shell resistors
The metal casing has good thermal conductivity.
It is designed with heat dissipation grooves.
Suitable for high-power application scenarios.
The characteristics of porcelain tube resistors
Ceramic material is resistant to high temperatures.
It has a simple structure and low cost.
Suitable for low-power environments.
Good insulation performance.
Test project
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Test conditions
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Performance
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Temperature
coefficient
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There sistance value is measured at room temperature and at room
temperature +100℃ respectively and the resistance change rate of
each degree is calculated.
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±300ppm/℃
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Short time
overload
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Apply avoltage of 10 times the rated power or the maximum load
voltage(take the smaller value).
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△R≤±
(2%+0.052)
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Resistance to welding
heat
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Immerse in a tin furnace at 350±10%℃ for 2-3 seconds.
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△R≤±
(1%+0.052)
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Weld ability
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Immerse in a tin furnace at 260±5%℃ for 2-3 seconds.
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Solder area covers
over95%
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Temperature cycle
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Leave at -55℃ for 30 minutes,then at +25℃ for 10-15 minutes,
then at +275℃ for 30 minutes,and finally at +25℃ for 10-15
minutes,in a total of 5 cycles.
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△R≤±
(1%+0.052)
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Load life in humidity
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Overload rated voltage or Max. working voltage(get the
lower) for 1000 hours (1.5 hours on and half-hours off) at the
40±2℃ and 90~95°relative humidity.
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△R≤±
(5%+0.052)
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Load life in heat
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At a temperature of 70±2℃, apply the rated voltage or
maximum operating voltage (which ever is lower) for a total of
1000 hours (1.5 hours on,0.5 hours off).
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△R≤±
(5%+0.052)
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Noncombustibility
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Add AC load at 5,10,and 16 times the rated power for 5
minutes respectively.
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No obvious flames
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