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. 892-4866
Mfr. Part No.D25K15RE
BrandOhmite
€13.07
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. 167-9773
Mfr. Part No.RA20117A10000KB10
BrandVishay
€63.123
Each (In a Box of 10)
units
- - - - - - - - - - - - - -
RS Stock No. 144-5506
Mfr. Part No.D25K300E
€10.45
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. 892-4816
Mfr. Part No.D225K10RE
BrandOhmite
€35.58
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. 892-4803
Mfr. Part No.D175K250E
BrandOhmite
€28.48
Each
units
250 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. 893-0912
Mfr. Part No.E300K3R1E
BrandOhmite
€34.78
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. 892-4844
Mfr. Part No.D225K500E
BrandOhmite
€30.08
Each
units
500 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. 891-8568
Mfr. Part No.D50K500E
BrandOhmite
€16.43
Each
units
500 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. 167-9906
Mfr. Part No.RA20117A100R0KB10
BrandVishay
€63.123
Each (In a Box of 10)
units
- - - - - - - - - - - - - -
RS Stock No. 892-4783
Mfr. Part No.D12K500E
BrandOhmite
€13.50
Each
units
500 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. 892-4838
Mfr. Part No.D225K2R0E
BrandOhmite
€41.41
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. 892-8300
Mfr. Part No.D25K200E
BrandOhmite
€13.07
Each
units
200 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. 892-4869
Mfr. Part No.D25K10KE
BrandOhmite
€23.33
Each
units
10 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. 893-5103
Mfr. Part No.D25K7K0
BrandOhmite
€10.677
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. 893-5119
Mfr. Part No.D75K250
BrandOhmite
€18.696
Each (In a Pack of 25)
units
250 Ω ±10% 75W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D75 14.3 x 152.4mm 14.3mm 152.4mm +350°C
RS Stock No. 167-9819
Mfr. Part No.RA20117A470R0KB10
BrandVishay
€63.123
Each (In a Box of 10)
units
- - - - - - - - - - - - - -
RS Stock No. 788-7797
Mfr. Part No.RSSD30250A4R70KB06
BrandVishay
€52.96
Each
units
4.7 Ω 10% 280W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 32 (Dia.) x 250mm 32mm 250mm +450°C
RS Stock No. 892-4917
Mfr. Part No.D50K1K0E
BrandOhmite
€15.93
Each
units
1 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. 788-7716
Mfr. Part No.RSSD10X50A10R0JS06
BrandVishay
€17.37
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. 2508373132
Mfr. Part No.D175K10RE
BrandOhmite
€38.78
Each
units
- - - - - - - - - - - - - -