Supply Rx24 150W Moulded Type Gold Aluminum Shell Resistor

High quality aluminum shell resistor
1.over 8 years experience, Professional resistor manufacturer.
2. Good overload resistor.
3. RoHS & ISO9001&ISO14000
4. OEM.


Aluminum shell resistance (gold aluminum shell) series, the shell is made of aluminum alloy, surface with heat sink, the size of small power, high temperature resistance, high overload capacity has the ability to weather resistance, high accuracy, low resistance, high stability, strong structure, and its flexibility to choose a good combination of restructuring and selection, is conducive to mechanical protection, more convenient for users to install. Application: power supply, inverter, servo and high requirements of harsh environment, long life. The resistance tolerances of 10%, 5%, 3%, 2%, 1%, 0.5%. And can be carried out in accordance with the need for large power model assembly. Also according to the customer demand and the production of specific resistance, and can be combined into a series of high power resistance box type, or the type of power.
The characteristics of high power, small size, high precision, high stability, strong structure.
General specification of power range: 5~~250W has 6 choices: 10%, 5%. The resistance tolerance, 3%, 2%, 1%, 0.5%

Model number	Rated Power	Resistance       (Ω)	Resistance Tolerance	A	B	C	I	I1	H	N
RX24	150W	5R	1%	130	48	27	52	37	26	3.2

Electrical characteristics:
1 general data:
Rated power 150W
Maximum operating voltage
Maximum overload voltage
Insulation voltage 1000VAC
Allow the resistance change of terminal strength less than R (0.2%R+0.05)
The temperature coefficient of resistance is less than or equal to 100 DEG C * 10-6/ + alpha
The temperature resistance of less than R (0.5%R+0.05)
High voltage R (less than 0.5%R+0.05)
Insulation resistance: R = 10G. When dry;
Humidity test: R = 1G.
Heat shock R less than (0.5%R+0.05)
Short time overload less than R (0.5%R+0.05)
Moisture resistance less than Delta R (1.0%R+0.05)
Long life is not more than R (1.0%R+0.05)
Impact (Specified Pulse) R (less than 0.2%R+0.05)
The high frequency vibration of delta R less than (0.2%R+0.05)

2 electrical performance and test specification:
3. Resistance: resistance value of the resistor is measured in the above-mentioned circumstances and nominal resistance compared, the error must be within the allowable error range.

A. rated voltage: rated voltage is the rated voltage of the resistor or the continuous working voltage of the approximate sine wave. It can be obtained by the following formula:
U = P: R (W) U:: rated voltage (V)
B. rated power: the nominal power of the resistor is usually the maximum power value of the resistor when the ambient temperature is below 25. When the ambient temperature is higher than 25, the rated power is determined by the reduced power curve of the following diagram.

Note: 5W RX24, 10W A:RX24 (not installed)
25W B:RX24 (not installed)
50W RX24, 100W RX24, 250W C:RX24 (not installed)
D: all models are installed on the recommended heat sink.
When the area of the heat sink is reduced, the resistor needs to be used for reducing power.
C. the temperature coefficient of resistance: at room temperature were measured for the resistance value of the resistor, which has placed - 55 DEG C, in a thermostat 125 DEG C and were maintained 30 to 50 minutes were measured the resistance value, then according to the following formula to calculate the temperature coefficient:
Temperature coefficient (C = 106 * (PPM/) RR0) /[R0 (T-T0)]
The resistance values (R0) measured at room temperature.
Resistance values (R) for the determination of the constant temperature box
T0 > Room Temperature (c)
Temperature (c) in the constant temperature box of T.
D. heat resistance: the resistor into the constant temperature box, the temperature rise to 275 + 5, 2 hours, and then cool to room temperature, the appearance of the resistor should be no mechanical damage.
E. resistance voltage: the resistor is normally installed on the metal plate, the metal plate size should be greater than the resistance body. 1000AC, time 1 minutes, the voltage applied to the connection between the lead and the metal mounting plate. Resistance should be no damage, flying arc, flash and insulation breakdown phenomenon.
F. insulation resistance: dry: R = 10G omega; humidity test: R = 1G.
G. thermal shock test: the resistor is fixed on the size of the aluminum chassis, the resistor should be properly ventilated. The rated voltage of the power supply is applied to the thermal stability. Then cut off voltage, within 8 to 12 seconds, the resistor into the -55 + 5 15~30 minutes in the constant temperature box. Take out after 2 hours, again measuring resistance, resistance changes before and after the test shall not exceed: (0.5%R0.05 + Omega). Resistor should be no mechanical damage.
H. short time overload: the resistor is fixed on the size of the aluminum chassis, the resistor should be properly ventilated. Power supply 5 times the rated power of the voltage, time 5 seconds. In the stable temperature measuring resistor resistor, before and after the test, the resistance variation shall not be greater than +:0.5%R 

+ 0.05), the resistor should be no fly arc, burning and carbonization phenomenon.
I. resistance to moisture: the resistor is fixed on the size of the aluminum chassis, the resistor should be properly ventilated. Resistor should be tested by MIL-STD-202 106. Before and after the test shall not be greater than the resistance change: (1%R0.05 + Omega). The leading edge should be free from fracture, fracture, loosening or corrosion. Insulation resistance should be no less than 1G.
J. long service life: the resistor is fixed in the size of the aluminum chassis, the resistor should be properly ventilated. Power supply voltage rating of 1000h, 1.5h, 0.5H. Before and after the test shall not be greater than the resistance change: (1%R0.05 + omega), resistors should be no mechanical damage. Insulation resistance should be no less than 10 G.
K. impact test: the resistor is fixed on the specified size of the aluminum chassis and fixed with appropriate fixture. The installation fixture should be able to make the mounting stand in line with the impact under static conditions. The test resistor should be subjected to the 213 method of MIL-STD-202, and the test conditions are I, acceleration: 100g, pulse duration: 6ms, and saw tooth wave. After the test resistor should be no visible damage and resistance change should not be greater than + (0.2%R0.05 omega) resistor should be can meet the requirements of the provisions of the withstand voltage of the medium.
L. vibration test: the resistor is fixed on the specified size of the aluminum chassis and fixed with appropriate fixture. The structure of the fixture should be able to prevent any resonance during the test. Resistors shall be tested in accordance with MIL-STD-202's 204 method. , the vibration frequency of the vibration table is gradually increased from 2000HZ to 10HZ, and then from 2000HZ to 10HZ, the frequency is changed from 20min to, and the amplitude is 1.5mm. In accordance with the above method to the X, Y, Z axis three direction of the scan 12 times, a total of about 12 hours. Test before and after the changes of the resistance shall not exceed: + (0.2%R +, 0.05 Ohm) resistor should be no mechanical damage, should be able to meet the requirements of the provisions of the medium pressure.