Adjustable Resistors

Adjustable resistors, also known as potentiometers, allow a degree of control over the resistance within a circuit. This gives them an advantage over other types of fixed resistor, depending on your needs.
They are composed of a fixed resistive element, and a slider that is able to pass along the element. This is what changes the resistance of the circuit, and it is usually controlled externally.

What are adjustable resistors used for?
Adjustable resistors are most commonly used for volume control in TV and radio. They can also be used as part of a light dimmer, to indirectly affect the level of light.

Types of adjustable resistor
Adjustable resistors largely vary based on material:

  • Wirewound adjustable resistors use a coil of resistance wire, and offer the highest performance.
  • Cermet adjustable resistors are composed of ceramic and metal. They can withstand high temperatures, and are often used in trimmer resistors.
  • Carbon composition adjustable resistors are some of the most common types used, as they are a good all-purpose resistor.
  • Conductive plastic adjustable resistors use conductive plastic ink, and have a low noise output.

...
Read more Read less

Filters

Viewing 1 - 20 of 160 products
Results per page
Description Price Resistance Tolerance Power Rating Temperature Coefficient Termination Style Package/Case Technology Mounting Style Case Style Series Dimensions Diameter Length Maximum Operating Temperature
RS Stock No. 788-7643
Mfr. Part No.RSSD20117A2R20KB15
BrandVishay
SGD44.51
Each
units
2.2Ω ±10% 100W - Radial RA Series Wire Wound Flange Mount Vitreous Enamel RSSD 22 x 117mm 22mm 117mm +450°C
RS Stock No. 788-7788
Mfr. Part No.RSSD30250A3300JB06
BrandVishay
SGD133.41
Each
units
330Ω 5% 280W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 32 (Dia.) x 250mm 32mm 250mm +450°C
RS Stock No. 788-7750
Mfr. Part No.RSSD25168A1R00KB06
BrandVishay
SGD127.72
Each
units
10% 200W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 27 (Dia.) x 168mm 27mm 168mm +450°C
RS Stock No. 893-3481
Mfr. Part No.D50K150E
BrandOhmite
SGD30.47
Each
units
150Ω ±10% 50W ±260ppm/°C Radial - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm +350°C
RS Stock No. 891-8561
Mfr. Part No.D50K1R0E
BrandOhmite
SGD35.78
Each
units
±10% 50W ±260ppm/°C Radial - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm +350°C
RS Stock No. 893-0928
Mfr. Part No.E300K8R0E
BrandOhmite
SGD68.69
Each
units
±10% 300W ±400ppm/°C Radial - - Bolt On, Bracket Vitreous Enamel E300 28.58 x 215.9mm 28.58mm 215.9mm +400°C
RS Stock No. 788-7734
Mfr. Part No.RSSD20117A10R0JB15
BrandVishay
SGD58.92
Each
units
10Ω 5% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm +450°C
RS Stock No. 788-7775
Mfr. Part No.RSSD25168A47R0JB06
BrandVishay
SGD102.47
Each
units
47Ω 5% 200W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 27 (Dia.) x 168mm 27mm 168mm +450°C
RS Stock No. 892-4761
Mfr. Part No.D12K100E
BrandOhmite
SGD24.79
Each
units
100Ω ±10% 12W ±260ppm/°C Radial - - Bolt On, Bracket Vitreous Enamel D12 8 x 44.4mm 7.94mm 44.4mm +350°C
RS Stock No. 892-4844
Mfr. Part No.D225K500E
BrandOhmite
SGD58.94
Each
units
500Ω ±10% 225W ±260ppm/°C Radial - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm +350°C
RS Stock No. 788-7738
Mfr. Part No.RSSD20117A1R00KB15
BrandVishay
SGD86.35
Each
units
10% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm +450°C
RS Stock No. 893-0918
Mfr. Part No.E300K2R0E
BrandOhmite
SGD68.42
Each
units
±10% 300W ±400ppm/°C Radial - - Bolt On, Bracket Vitreous Enamel E300 28.58 x 215.9mm 28.58mm 215.9mm +400°C
RS Stock No. 893-0906
Mfr. Part No.E300K1R0E
BrandOhmite
SGD73.35
Each
units
±10% 300W ±400ppm/°C Radial - - Bolt On, Bracket Vitreous Enamel E300 28.58 x 215.9mm 28.58mm 215.9mm +400°C
RS Stock No. 893-0921
Mfr. Part No.E300K4R0E
BrandOhmite
SGD68.42
Each
units
±10% 300W ±400ppm/°C Radial - - Bolt On, Bracket Vitreous Enamel E300 28.58 x 215.9mm 28.58mm 215.9mm +400°C
RS Stock No. 892-4771
Mfr. Part No.D12K250E
BrandOhmite
SGD22.539
Each (In a Pack of 25)
units
250Ω ±10% 12W ±260ppm/°C Radial - - Bolt On, Bracket Vitreous Enamel D12 8 x 44.4mm 7.94mm 44.4mm +350°C
RS Stock No. 892-4840
Mfr. Part No.D225K4R0E
BrandOhmite
SGD74.90
Each
units
±10% 225W ±260ppm/°C Radial - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm +350°C
RS Stock No. 892-4796
Mfr. Part No.D12K5K0E
BrandOhmite
SGD21.16
Each
units
5000Ω ±10% 12W ±260ppm/°C Radial - - Bolt On, Bracket Vitreous Enamel D12 8 x 44.4mm 7.94mm 44.4mm +350°C
RS Stock No. 892-4856
Mfr. Part No.D225K5R0E
BrandOhmite
SGD75.17
Each
units
±10% 225W ±260ppm/°C Radial - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm +350°C
RS Stock No. 788-7772
Mfr. Part No.RSSD30250A1000JB06
BrandVishay
SGD132.98
Each
units
100Ω 5% 280W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 32 (Dia.) x 250mm 32mm 250mm +450°C
RS Stock No. 892-1163
Mfr. Part No.E300K5R0E
BrandOhmite
SGD68.69
Each
units
±10% 300W ±400ppm/°C Radial - - Bolt On, Bracket Vitreous Enamel E300 28.58 x 215.9mm 28.58mm 215.9mm +400°C