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. 892-4800
Mfr. Part No.D175K2K5E
BrandOhmite
PHP1,619.65
Each
units
2.5 kΩ ±10% 175W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D175 28.6 x 215.9mm 28.6mm 215.9mm +350°C
RS Stock No. 892-4910
Mfr. Part No.D25K5R0E
BrandOhmite
PHP820.63
Each
units
5 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. 788-7716
Mfr. Part No.RSSD10X50A10R0JS06
BrandVishay
PHP1,632.20
Each
units
10 Ω 5% 25W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 11.5 (Dia.) x 50mm 11.5mm 50mm +450°C
RS Stock No. 893-5096
Mfr. Part No.D12K100
BrandOhmite
PHP593.218
Each (In a Pack of 25)
units
100 Ω ±10% 12W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D12 7.94 x 44.4mm 7.94mm 44.4mm +350°C
RS Stock No. 893-0915
Mfr. Part No.E300K20RE
BrandOhmite
PHP2,034.85
Each
units
20 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. 788-7740
Mfr. Part No.RSSD20117A4R70KB15
BrandVishay
PHP2,152.04
Each
units
4.7 Ω 10% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm +450°C
RS Stock No. 892-4771
Mfr. Part No.D12K250E
BrandOhmite
PHP739.851
Each (In a Pack of 25)
units
250 Ω ±10% 12W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D12 7.94 x 44.4mm 7.94mm 44.4mm +350°C
RS Stock No. 893-0912
Mfr. Part No.E300K3R1E
BrandOhmite
PHP2,086.81
Each
units
3 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. 892-4806
Mfr. Part No.D175K25RE
BrandOhmite
PHP1,983.91
Each
units
25 Ω ±10% 175W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D175 28.6 x 215.9mm 28.6mm 215.9mm +350°C
RS Stock No. 788-7643
Mfr. Part No.RSSD20117A2R20KB15
BrandVishay
PHP1,555.00
Each
units
2.2 Ω ±10% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm +450°C
RS Stock No. 892-4724
Mfr. Part No.D100K10RE
BrandOhmite
PHP1,583.63
Each
units
10 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. 892-4816
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. 892-4939
Mfr. Part No.D50K300E
BrandOhmite
PHP899.86
Each
units
300 Ω ±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm +350°C
RS Stock No. 788-7744
Mfr. Part No.RSSD20117A47R0JB15
BrandVishay
PHP1,892.12
Each
units
47 Ω 5% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm +450°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
RS Stock No. 892-8410
Mfr. Part No.D100K5K0E
BrandOhmite
PHP1,270.82
Each
units
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. 892-4793
Mfr. Part No.D175K100E
BrandOhmite
PHP1,642.28
Each
units
100 Ω ±10% 175W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D175 28.6 x 215.9mm 28.6mm 215.9mm +350°C
RS Stock No. 892-4888
Mfr. Part No.D25K25KE
BrandOhmite
PHP770.21
Each
units
25 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. 893-1069
Mfr. Part No.D225K30R-B
BrandOhmite
PHP766.807
Each (In a Pack of 25)
units
30 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