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.

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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. 788-7845
Mfr. Part No.RA20117A10000KB10
BrandVishay
PHP6,042.84
Each
units
1 kΩ ±10% 50W - Screw Tubular Wire Wound - - RA20117 - - - +350°C
RS Stock No. 893-5112
Mfr. Part No.D25K7K0E
BrandOhmite
PHP597.334
Each (In a Pack of 25)
units
7 kΩ ±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm +350°C
RS Stock No. 892-4831
Mfr. Part No.D225K25RE
BrandOhmite
PHP2,113.57
Each
units
25 Ω ±10% 225W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm +350°C
RS Stock No. 893-0946
Mfr. Part No.E300KR50E
BrandOhmite
PHP2,346.63
Each
units
500 mΩ ±10% 300W ±400ppm/°C - - - Bolt On, Bracket Vitreous Enamel E300 28.58 x 215.9mm 28.58mm 215.9mm +400°C
RS Stock No. 892-4838
Mfr. Part No.D225K2R0E
BrandOhmite
PHP2,544.72
Each
units
2 Ω ±10% 225W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm +350°C
RS Stock No. 788-7725
Mfr. Part No.RSSD10X50A1R00KS06
BrandVishay
PHP1,175.50
Each
units
1 Ω 10% 25W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 11.5 (Dia.) x 50mm 11.5mm 50mm +450°C
RS Stock No. 892-8195
Mfr. Part No.D100K10KE
BrandOhmite
PHP1,225.54
Each
units
10 kΩ ±10% 100W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D100 19.1 x 165.1mm 19.1mm 165.1mm +350°C
RS Stock No. 892-4866
Mfr. Part No.D25K15RE
BrandOhmite
PHP820.63
Each
units
15 Ω ±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm +350°C
RS Stock No. 893-0902
Mfr. Part No.E300K16RE
BrandOhmite
PHP1,950.47
Each
units
16 Ω ±10% 300W ±400ppm/°C - - - Bolt On, Bracket Vitreous Enamel E300 28.58 x 215.9mm 28.58mm 215.9mm +400°C
RS Stock No. 892-4816
Mfr. Part No.D225K10RE
BrandOhmite
PHP2,210.25
Each
units
10 Ω ±10% 225W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm +350°C
RS Stock No. 892-4743
Mfr. Part No.D100K3R0E
BrandOhmite
PHP1,548.65
Each
units
3 Ω ±10% 100W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D100 19.1 x 165.1mm 19.1mm 165.1mm +350°C
RS Stock No. 892-8335
Mfr. Part No.D100K2K5E
BrandOhmite
PHP1,327.92
Each
units
2.5 kΩ ±10% 100W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D100 19.1 x 165.1mm 19.1mm 165.1mm +350°C
RS Stock No. 788-7738
Mfr. Part No.RSSD20117A1R00KB15
BrandVishay
PHP3,047.80
Each
units
1 Ω 10% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm +450°C
RS Stock No. 144-5503
Mfr. Part No.D100K25RE
PHP1,306.32
Each
units
25 Ω ±10% 100W ±260ppm/°C Solder - Wire Wound Bolt On Vitreous Enamel 210 19.1 (Dia.) x 165.1mm 19.1mm 165.1mm +350°C
RS Stock No. 891-8580
Mfr. Part No.D50K100KE
BrandOhmite
PHP1,027.97
Each
units
100 kΩ ±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm +350°C
RS Stock No. 161-7570
Mfr. Part No.ZC3/6-FT
BrandCressall
PHP7,001.82
Each
units
650 mΩ ±10% - - Screw - Wire Wound Bolt On - ZC - - 330mm +50°C
RS Stock No. 788-7775
Mfr. Part No.RSSD25168A47R0JB06
BrandVishay
PHP3,323.45
Each
units
47 Ω 5% 200W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 27 (Dia.) x 168mm 27mm 168mm +450°C
RS Stock No. 144-5506
Mfr. Part No.D25K300E
PHP820.63
Each
units
300 Ω ±10% 25W ±260ppm/°C Solder - Wire Wound Bolt On Vitreous Enamel 210 14.3 (Dia.) x 50.8mm 14.3mm 50.8mm +350°C
RS Stock No. 892-4730
Mfr. Part No.D100K250E
BrandOhmite
PHP1,430.31
Each
units
250 Ω ±10% 100W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D100 19.1 x 165.1mm 19.1mm 165.1mm +350°C
RS Stock No. 892-8353
Mfr. Part No.D25K250E
BrandOhmite
PHP820.63
Each
units
250 Ω ±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm +350°C