Power resistance and resistance box system solution providerManufacture of national brands of power resistors and resistor boxes

1. Product Features:

Small size, high power, anti-high temperature, strong overload capacity, weather fastness, high precision, high stability, strong frame characteristics, conducive to mechanical protection, easy installation.

Because of its high precision and stable temperature coefficient, it is also the best choice for current sensing resistor, standard low inductance resistor and high precision resistor.

2. Product Structure:
2.1 The core parts of the resistance core are made of insulating and high temperature resistant materials as the resistance framework, high-quality alloy wires are evenly wound on the resistance framework, then filled into fast heat dissipation aluminum shell, and sealed with high quality and high thermal conductivity organic quartz sand, so that the metal aluminum shell and the core parts of the resistance are closely combined into a solid entity, which is not affected by external air and dust, and has high stability and thermal conductivity.

2.2 The aluminum shell is made of high-quality industrial 6063 aluminum, thickened shaped shell,  heat sink groove design, and gold anodizing treatment on the surface, the heat dissipation effect is more powerful and the appearance is beautiful and surface is treated by high-temperature. 

2.3 When applied to automotive LED lamp industry, ZENITHSUN can weld high temperature cables and clips with different models and colors for customers.
2.4 We accept all kinds of non-standard customization to meet the needs of customers.

3. Application fields:

Inverter, servo motor, servo driver, power load, elevator, lifting, medium frequency furnace, electric furnace, induction heating equipment industry, new energy vehicle manufacturing, wind power pitch system, wind power electronic control system and converter, solar photovoltaic inverter industry, small and medium-sized wind turbine (including grid connected / off grid type), medical equipment Machinery industry (such as paper machine), communication industry, rail transit, railway locomotive, power system, fan load, mining equipment, transformer, CNC machine tool, reactive power compensation device, laser industry, aviation, shipbuilding, military industry, State Grid, engineering supporting, major universities and design and research institutes.

Parameter

Unit

Resistors Characteristics

Temperature Coefficients

Ppm/℃

±20ppm/⁰C; ±50ppm/⁰C; ±100ppm/⁰C; ±200ppm/⁰C; ±250ppm/⁰C;

Short Time Overload with heatsink

VAC

1000V for 5W, 10W, 25W; 2000V for 50W; 2500V for 75W to 500W.

Short Time Overload with heatsink

/

5×rated power for 5 seconds

Maximum Working Voltage

V

√PR

Insulation Resistance

Ω

10000Megohm minimum dry, 1000Megohm minimum after moisture test.

Terminal Tensile Strength

N

22.2N for 5W-25W, 44.4N for all others.

Solderability

/

MIL-PRF-18546 Type - Meets requirements of ANSI.J-STD-002

Temperature Range

⁰C

-55⁰C to +250⁰C

Test Item

Test Condition

Test Limits

Thermal Shock 

Rated power applied until thermally stable, then a minimum of 15 minutes at -55⁰C.

△R≤±(0.5%R+0.05R)

Short Time Overload

5×rated power for 5 seconds

△R≤±(0.5%R+0.05R)

Insulation Voltage 

1000V for 5W-25W; 2000V for 50W; 4500Vfor 75W-500W, 1 minutes

△R≤±(0.2%R+0.05R)

Temperature

250⁰C, 2 hours

△R≤±(0.5%R+0.05R)

Moisture Resistance 

MIL-STD-202 Method 106, 7b not applicable

△R≤±(1%R+0.05R)

Shock Specified Pulse 

MIL-STD-202 Method 213, 100g, 6ms, 10 shocks

△R≤±(0.2%R+0.05R)

Vibration high frequency

Frequency varied 10-2000Hz, 20g peak, 2 directions, 6 hours

△R≤±(0.2%R+0.05R)

Load Life

Rated Power, 1000 hours, 25⁰C, 1.5 hours ON, 0.5 hours OFF

△R≤±(5.0%R+0.05R)

Terminal Strength

5 Pound pull test: 5-10W 30s, 10 pound pull test for other size. Torque test: 24 pound inch for 75W - 200W, 32 pound inch for 250W-500W.

△R≤±(0.2%R+0.05R)