| Customization: | Available |
|---|---|
| Resistance: | Variable Resistor |
| Function for Resistance: | Adjustable Resistor |
|
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Disc adjustable resistor
Multiple adjustable resistance values can be made using different resistance winding wires on the disc adjustable resistor, which has the characteristics of high power, moisture resistance, and wide resistance range. The power range is wide, and higher power can be negotiated and customized.
The disc adjustable resistor is made by winding high-quality resistor alloy wire around a C-shaped ceramic ring. In addition to the sliding contact surface, the entire resistor ring is coated with non combustible resin paint to protect the wire and improve heat dissipation. After drying in the shade, it is fixed on a circular chassis with a special electronic bonding material. After high-temperature baking, other hardware accessories are installed, and a center rotating adjustment part is installed. The carbon brush is driven by the rotating shaft to slide on the resistor wire to obtain the required resistance value.
Longer service life: using glazed disk, acid and alkali resistant, moisture resistant, long service life
(25W) 75 ceramic chassis, red enamel glaze, high-quality resistance wire
Pure copper spiral rod, stainless steel base bolt
Small size, high power
Strong overload capacity and high temperature resistance
Suitable for voltage and current regulation in power equipment and circuits with AC voltage not exceeding 380V and DC voltage not exceeding 220V
| Description | Disc adjustable resistor |
| Power range | 25W-500W |
| Resistance range | 1R-5K (can customize) |
| Structure | Cantilever manually adjustable, wiring terminal leads out |
| Feature | Adjustable resistance value |
| Advantages | Natural cooling, glazed surface, moisture resistance, high power, strong overload capacity, high temperature resistance |
| Usage environment | transportation, railway, electrical, bread machine, broadcasting communication, etc Rated power temperature (+70'C) |
| Temperature range | -55~+315ºC |
| Standard | GB/T5729-2003 GB5732-85 |
| Power (W) |
Resistance range (Ω) | Dimension (mm) |
Tolerance (%) |
temperature coefficient PPM |
|||||
| A max | B max | D | E | F max | G | ||||
| 25 | 5R-2K | 44 | 40 | 6 | 50 | 25 | ±10 | ±250 | |
| 50 | 5R-2K | 66 | 42 | 6 | 75 | 25 | |||
| 100 | 5R-4K | 84 | 44 | 6 | 102 | 25 | |||
| 150 | 5R-4K | 106 | 54 | 6 | 120 | 25 | |||
| 300 | 5R-4K | 158 | 90 | 10 | 145 | 170 | 45 | ||
| 300 | 5R-4K | 206 | 90 | 10 | 192 | 215 | 60 | ||
| 50X2 | 5R-4K | 85 | 110 | 6 | 75 | 52 | |||
| 100X2 | 5R-8K | 115 | 145 | 6 | 102 | 52 | |||
| 150X2 | 5R-8K | 135 | 155 | 6 | 120 | 52 | |||
| 300X2 | 5R-8K | 180 | 165 | 10 | 145 | 170 | 38 | ||
| 500X2 | 5R-8K | 220 | 165 | 10 | 192 | 215 | 38 | ||
| 150X3 | 5R-12K | 135 | 220 | 10 | 100 | 120 | 25 | ||
| 300X3 | 5R-12K | 180 | 275 | 10 | 145 | 170 | 38 | ||
| 500X3 | 5R-12K | 220 | 295 | 10 | 192 | 215 | 38 | ||
| Inspection items | Performance requirements | Test methods |
| Temperature coefficient | ≤±250 (x10-6ºC) | -55ºC/+20ºC 20ºC/+125ºC |
| Terminal tensile strength | R≤±(1%R+0.05Ω) | Pull 20N |
| Voltage endurance | Non breakdown cargo arcing | 2500VDC, 1min |
| Weldability | Solder can flow freely and infiltrate with the lead out end | 235±5ºC, 2±0.5s |
| Resistance to welding heat | R≤±(1%R+0.05Ω) | 260±5ºC 10±1S |
| Short term overload | R≤±(2%R+0.05Ω) | 10 times rated power,5s |
| Rapid temperature changes | R≤±(1%R+0.05Ω) | -55ºC/+125ºC, 5 times cycles |
| Shock | R≤±(1%R+0.05Ω) | 10-500Hz, 98m/s2 |
| Long term load | R≤±(2%R+0.05Ω) | +70±2ºC VR1000h |
| Non combustibility | Not burning | 1-6 times rated power,5mins |
| Surface temperature rise | ≤350ºC | Add rated power |
| Insulation resistance value | 1000MΩ | 1000VDC |
| Steady state damp heat | R≤±(2%R+0.05Ω) | +40±2ºC, humidity95-98% 240h |
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