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. 892-4954
Mfr. Part No.D50K5K0E
BrandOhmite
SGD21.002
Each (In a Pack of 25)
units
5kΩ ±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm +350°C
RS Stock No. 167-9773
Mfr. Part No.RA20117A10000KB10
BrandVishay
SGD106.157
Each (In a Box of 10)
units
- - - - - - - - - - - - - -
RS Stock No. 892-4825
Mfr. Part No.D225K1K0E
BrandOhmite
SGD41.64
Each
units
1kΩ ±10% 225W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm +350°C
RS Stock No. 892-4869
Mfr. Part No.D25K10KE
BrandOhmite
SGD18.56
Each
units
10kΩ ±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm +350°C
RS Stock No. 892-4752
Mfr. Part No.D100K4R0E
BrandOhmite
SGD36.97
Each
units
±10% 100W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D100 19.1 x 165.1mm 19.1mm 165.1mm +350°C
RS Stock No. 892-4730
Mfr. Part No.D100K250E
BrandOhmite
SGD33.22
Each
units
250Ω ±10% 100W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D100 19.1 x 165.1mm 19.1mm 165.1mm +350°C
RS Stock No. 892-4960
Mfr. Part No.D75K15RE
BrandOhmite
SGD35.37
Each
units
15Ω ±10% 75W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D75 14.3 x 152.4mm 14.3mm 152.4mm +350°C
RS Stock No. 892-8192
Mfr. Part No.D50K100E
BrandOhmite
SGD18.20
Each
units
100Ω ±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm +350°C
RS Stock No. 892-4715
Mfr. Part No.D100K100E
BrandOhmite
SGD33.22
Each
units
100Ω ±10% 100W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D100 19.1 x 165.1mm 19.1mm 165.1mm +350°C
RS Stock No. 893-5519
Mfr. Part No.D225K250E-B
BrandOhmite
SGD17.658
Each (In a Pack of 50)
units
250Ω ±10% 225W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm +350°C
RS Stock No. 892-8537
Mfr. Part No.D225K10KE
BrandOhmite
SGD47.98
Each
units
10kΩ ±10% 225W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm +350°C
RS Stock No. 893-5119
Mfr. Part No.D75K250
BrandOhmite
SGD30.615
Each (In a Pack of 25)
units
250Ω ±10% 75W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D75 14.3 x 152.4mm 14.3mm 152.4mm +350°C
RS Stock No. 893-0912
Mfr. Part No.E300K3R1E
BrandOhmite
SGD45.02
Each
units
±10% 300W ±400ppm/°C - - - Bolt On, Bracket Vitreous Enamel E300 28.58 x 215.9mm 28.58mm 215.9mm +400°C
RS Stock No. 893-0937
Mfr. Part No.E300KR16E
BrandOhmite
SGD69.93
Each
units
160mΩ ±10% 300W ±400ppm/°C - - - Bolt On, Bracket Vitreous Enamel E300 28.58 x 215.9mm 28.58mm 215.9mm +400°C
RS Stock No. 893-5513
Mfr. Part No.D225K500E-B
BrandOhmite
SGD19.83
Each
units
500Ω ±10% 225W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm +350°C
RS Stock No. 788-7716
Mfr. Part No.RSSD10X50A10R0JS06
BrandVishay
SGD25.90
Each
units
10Ω 5% 25W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 11.5 (Dia.) x 50mm 11.5mm 50mm +450°C
RS Stock No. 892-4755
Mfr. Part No.D100K500E
BrandOhmite
SGD33.22
Each
units
500Ω ±10% 100W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D100 19.1 x 165.1mm 19.1mm 165.1mm +350°C
RS Stock No. 788-7756
Mfr. Part No.RSSD25168A10R0JB06
BrandVishay
SGD67.00
Each
units
10Ω 5% 200W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 27 (Dia.) x 168mm 27mm 168mm +450°C
RS Stock No. 161-7573
Mfr. Part No.ZC3/10-FT
BrandCressall
SGD202.97
Each
units
1.98Ω ±10% - - Screw - Wire Wound Bolt On - ZC - - 330mm +50°C
RS Stock No. 892-5752
Mfr. Part No.D175K500E
BrandOhmite
SGD45.43
Each
units
500Ω ±10% 175W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D175 28.6 x 215.9mm 28.6mm 215.9mm +350°C
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