Wirewound Tubular Adjustable Resistors 75W and Mounting Hardware
|Resistance range||1.8 Ohm – 100 kOhm|
|Resistance tolerance||±5%, ±10%|
|Price||Resistor APT 75W 1.8R - 100K||on request|
|Dimensions D×L×H×d||30×140×43×20 mm|
Wirewound adjustable (regulated, variable) high-power resistors of type APT (Adjustable Painted Tubular Resistors) series, dissipation power 75W, rated resistance from 1.8 Ohm to 100 kOhm. Similar series of resistors are RX20, RXG. Resistors are designed for using in AC and DC circuits, providing current limitation and voltage distribution. Resistors with a specific rated power can also be manufactured to individual order.
Structurally, the resistor consists of a tubular ceramic core on which a constantan (low resistance resistor) or nichrome (high resistance resistor) wire is wound. Resistors are coated with heat-resistant and moisture-resistant insulating paint.
Resistor resistance is adjusted by changing the position of the moving clamping collar (movable contact) along the case (tube). The contact between the clamping collar and the wire coils of the resistor is provided by the unpainted side of the housing.
Contacts, resistor leads are rigid, tape type with screw holes or for soldering conductors. Kind of mounting is hinged. Mounting of resistors on the panel is provided by a set of fasteners. Resistance tolerance is ±5%, ±10%.
The maximum operating voltage at AC is 1000V, at DC – 1400V. Operating elevated ambient temperature does not exceed +155°C (at the same time the power is reduced to 60% of the nominal power), the limit temperature up to +250°C. The insulation resistance of wire resistors is at least 1000 MOhm. Working time – at least 15000 hours.
Using the calculator, it is convenient to calculate the total resistance when the resistors are connected in parallel or in series, and the resistor resistance in the circuit.
Comparative characteristics of wire tube resistors, cement resistors and resistors in aluminium housing are presented in the comparative table.
Detailed resistor specifications, overall and mounting dimensions, mounting kit, installation and operation recommendations are given on the page below.
Our company is engaged in the production and sale of wirewound tubular resistors. All our products pass strict quality control and meet the necessary standards. Since we are the manufacturer, and in the price of the final product does not include dealer markups, we have low price saddle packing.
The warranty period of the resistors 100W supplied by our company is 2 years. Documents confirming the quality of products are provided.
The final price for 75W Wirewound Tubular Adjustable Variable Resistors depends on the quantity, delivery terms and form of payment.
For questions regarding the acquisition of WireWound Tubular Resistors 75W, send an email request to:
And we will provide you a commercial offer for delivery.
For a large number, we will provide an individual price!!!
We are interested in local partners and distributors for long-term cooperation.
We are open to manufacture products at our production facilities according to your requests and technical task.
Range of nominals of Ceramic Wirewound Tubular Adjustable Variable Resistors 50 Watts:
|1.8 Ohm – 62 Ohm||68 Ohm – 2.7 kOhm||3 kOhm – 100 kOhm|
|APT 75W 1.8 Ohm||on request||APT 75W 68 Ohm||on request||APT 75W 3 kOhm||on request|
|APT 75W 2 Ohm||on request||APT 75W 75 Ohm||on request||APT 75W 3.3 kOhm||on request|
|APT 75W 2.2 Ohm||on request||APT 75W 82 Ohm||on request||APT 75W 3.6 kOhm||on request|
|APT 75W 2.4 Ohm||on request||APT 75W 91 Ohm||on request||APT 75W 3.9 kOhm||on request|
|APT 75W 2.7 Ohm||on request||APT 75W 100 Ohm||on request||APT 75W 4.3 kOhm||on request|
|APT 75W 3 Ohm||on request||APT 75W 110 Ohm||on request||APT 75W 4.7 kOhm||on request|
|APT 75W 3.3 Ohm||on request||APT 75W 120 Ohm||on request||APT 75W 5.0 kOhm||on request|
|APT 75W 3.6 Ohm||on request||APT 75W 130 Ohm||on request||APT 75W 5.1 kOhm||on request|
|APT 75W 3.9 Ohm||on request||APT 75W 150 Ohm||on request||APT 75W 5.6 kOhm||on request|
|APT 75W 4.3 Ohm||on request||APT 75W 160 Ohm||on request||APT 75W 6.2 kOhm||on request|
|APT 75W 4.7 Ohm||on request||APT 75W 180 Ohm||on request||APT 75W 6.8 kOhm||on request|
|APT 75W 5.0 Ohm||on request||APT 75W 200 Ohm||on request||APT 75W 7.5 kOhm||on request|
|APT 75W 5.1 Ohm||on request||APT 75W 220 Ohm||on request||APT 75W 8.2 kOhm||on request|
|APT 75W 5.6 Ohm||on request||APT 75W 240 Ohm||on request||APT 75W 9.1 kOhm||on request|
|APT 75W 6.2 Ohm||on request||APT 75W 270 Ohm||on request||APT 75W 10 kOhm||on request|
|APT 75W 6.8 Ohm||on request||APT 75W 300 Ohm||on request||APT 75W 11 kOhm||on request|
|APT 75W 7.5 Ohm||on request||APT 75W 330 Ohm||on request||APT 75W 12 kOhm||on request|
|APT 75W 8.2 Ohm||on request||APT 75W 360 Ohm||on request||APT 75W 13 kOhm||on request|
|APT 75W 9.1 Ohm||on request||APT 75W 390 Ohm||on request||APT 75W 15 kOhm||on request|
|APT 75W 10 Ohm||on request||APT 75W 430 Ohm||on request||APT 75W 18 kOhm||on request|
|APT 75W 11 Ohm||on request||APT 75W 470 Ohm||on request||APT 75W 20 kOhm||on request|
|APT 75W 12 Ohm||on request||APT 75W 500 Ohm||on request||APT 75W 22 kOhm||on request|
|APT 75W 13 Ohm||on request||APT 75W 510 Ohm||on request||APT 75W 24 kOhm||on request|
|APT 75W 15 Ohm||on request||APT 75W 560 Ohm||on request||APT 75W 27 kOhm||on request|
|APT 75W 16 Ohm||on request||APT 75W 620 Ohm||on request||APT 75W 30 kOhm||on request|
|APT 75W 18 Ohm||on request||APT 75W 680 Ohm||on request||APT 75W 33 kOhm||on request|
|APT 75W 20 Ohm||on request||APT 75W 750 Ohm||on request||APT 75W 36 kOhm||on request|
|APT 75W 22 Ohm||on request||APT 75W 820 Ohm||on request||APT 75W 39 kOhm||on request|
|APT 75W 24 Ohm||on request||APT 75W 910 Ohm||on request||APT 75W 43 kOhm||on request|
|APT 75W 27 Ohm||on request||APT 75W 1 kOhm||on request||APT 75W 47 kOhm||on request|
|APT 75W 30 Ohm||on request||APT 75W 1.1 kOhm||on request||APT 75W 50 kOhm||on request|
|APT 75W 33 Ohm||on request||APT 75W 1.2 kOhm||on request||APT 75W 51 kOhm||on request|
|APT 75W 36 Ohm||on request||APT 75W 1.3 kOhm||on request||APT 75W 56 kOhm||on request|
|APT 75W 39 Ohm||on request||APT 75W 1.5 kOhm||on request||APT 75W 62 kOhm||on request|
|APT 75W 43 Ohm||on request||APT 75W 1.6 kOhm||on request||APT 75W 68 kOhm||on request|
|APT 75W 47 Ohm||on request||APT 75W 1.8 kOhm||on request||APT 75W 75 kOhm||on request|
|APT 75W 50 Ohm||on request||APT 75W 2 kOhm||on request||APT 75W 82 kOhm||on request|
|APT 75W 51 Ohm||on request||APT 75W 2.2 kOhm||on request||APT 75W 91 kOhm||on request|
|APT 75W 56 Ohm||on request||APT 75W 2.4 kOhm||on request||APT 75W 100 kOhm||on request|
|APT 75W 62 Ohm||on request||APT 75W 2.7 kOhm||on request|
Part Numbering Guide for Resistors 75W:
|APT||–||Adjustable Painted Tubular Resistor Series.|
|75W||–||Rated Power, Watts.|
|500 Ohm||–||Nominal Resistance, Ohm.|
Electrical and technical specifications of Wirewound Tubular Resistors 75W:
|Resistance range||1.8 Ohm – 100 kOhm|
|Series of nominal resistance values||E24, Datasheet of resistance values|
|Resistance tolerance||± 5%, ± 10%|
|Rated voltage||Vmax = (Pnom × Rnom)0.5|
|Maximum working voltage||1400V|
|Operating temperature||-60°C ... +155°C|
|Raised ambient operating temperature||70ºC|
|Relative humidity at 35°C without condensation||<98%|
|Temperature coefficient of resistance||±500 ppm/°C|
|Insultation resistance||1000 MOhm|
|Life time||15000 hours|
Mounting Hardware for Wirewound Tubular Resistors
Mounting hardware are used for mounting the resistors. Resistors can be supplied with a set of mounting hardware, including mounting brackets (corners), which must be ordered individually.
Completeness of Mounting Hardware for Wirewound Tubular Resistors
Installation methods of tube resistors
At influence of mechanical factors for resistors the hinged way of installation is applied. The resistors are fixed to the mounting plates by mounting hardware:
- resistor power from 3 to 25 Watt – cantilever or on two brackets at the ends of the mounting studs
- resistor power from 50 to 160 Watt – only on two brackets at the ends of the mounting studs
Overall and Mounting Dimensions of Wirewound Tubular Adjustable Resistors 75W:
|L, mm||L1, mm||ØD, mm||H, mm||Ød, mm||Ød1, mm||B, mm||A, mm|
WireWound Tubular Ceramic Power Resistors by AS ENERGI
Our company is engaged in the manufacturer and sale of wirewound tubular resistors fixed and adjustable types.
You can buy resistors from us in any volumes, and when ordering large lots, the price will be lower.
We have earned the trust of customers and cooperate with companies from neighboring countries.
To purchase WireWound Tubular Resistors, send an email request to:
And we will provide you a commercial offer for delivery.
Datasheet (pdf specification) for Wire Wound Tubular Adjustable Variable Resistors:
Guide for using and operation of resistors:
- Solder the wires to the resistor leads in specially designed holes.
- When installing resistors in equipment recommended to use Sn40Pb60 solder. Soldering iron core temperature is 300°C. Soldering iron power is 65W. The flux should consist of 25% by weight of rosin and 75% by weight of isopropyl or ethyl alcohol. Soldering time 5 s.
- The voltage that can be supplied to the resistor must not exceed the value calculated on the basis of the nominal (or allowable) power Pnom and nominal resistance Rnom according to the formula:
Vmax = (Pnom × Rnom)0.5
- Resonant frequency value - 1500 Hz.
- 95-percent work resource - 30 000 hours.
- It is allowed to operate resistors under the influence of gas media of this composition (without the formation of an explosive mixture):
- nitrogen – up to 96%;
- oxygen – up to 50%;
- carbon dioxide – up to 3%;
- hydrogen – up to 20%;
- helium – up to 1%;
- argon – up to 1,5%.
- Operation of resistors during and after exposure to atmospheric pressure reduced to 10~5 mm Hg is allowed.
- In electrical circuits with voltages above 500V resistors must be used with additional insulation at the mounting points.
- When using resistors in equipment with vibration loads from 1 to 2500 Hz with an acceleration of 176.6 m/s2 (18g), the resistor leads must be soldered with a 0.5 mm2 wire cross-section with insulation by a polychlorovinyl tube Ø4 mm and length of 15-20 mm – for resistors 5-25 W, and Ø5 mm and length of 15-20 mm – for resistors 50-100 W.
- Tensile force value should be 20N (2 kgf).
- The upper frequency of the range in which there should be no resonant frequencies – 1000 Hz.
- Maximum surface temperature of the resistor is not more than 250°C.
Graph of the resistor power reduction:
The load power should be reduced based on the derating curve once the ambient temperature exceeds the rated values.
Comparative performance of high power resistors: