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. 892-4872
Mfr. Part No.D25K1R0E
BrandOhmite
MYR55.68
Each
units
±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm +350°C
RS Stock No. 892-4819
Mfr. Part No.D175K50RE
BrandOhmite
MYR164.80
Each
units
50Ω ±10% 175W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D175 28.6 x 215.9mm 28.6mm 215.9mm +350°C
RS Stock No. 892-4730
Mfr. Part No.D100K250E
BrandOhmite
MYR115.93
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. 892-5755
Mfr. Part No.D25K3R0E
BrandOhmite
MYR61.31
Each
units
±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm +350°C
RS Stock No. 892-8593
Mfr. Part No.D75K750E
BrandOhmite
MYR104.38
Each
units
750Ω ±10% 75W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D75 14.3 x 152.4mm 14.3mm 152.4mm +350°C
RS Stock No. 788-7643
Mfr. Part No.RSSD20117A2R20KB15
BrandVishay
MYR124.77
Each
units
2.2Ω ±10% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm +450°C
RS Stock No. 892-4721
Mfr. Part No.D100K1R0E
BrandOhmite
MYR134.23
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. 788-7728
Mfr. Part No.RSSD10X50A22R0JS06
BrandVishay
MYR102.52
Each
units
22Ω 5% 25W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 11.5 (Dia.) x 50mm 11.5mm 50mm +450°C
RS Stock No. 893-1069
Mfr. Part No.D225K30R-B
BrandOhmite
MYR66.875
Each (In a Pack of 25)
units
30Ω ±10% 225W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm +350°C
RS Stock No. 892-8347
Mfr. Part No.D50K750E
BrandOhmite
MYR72.93
Each
units
750Ω ±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm +350°C
RS Stock No. 892-4783
Mfr. Part No.D12K500E
BrandOhmite
MYR65.32
Each
units
500Ω ±10% 12W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D12 7.94 x 44.4mm 7.94mm 44.4mm +350°C
RS Stock No. 167-9906
Mfr. Part No.RA20117A100R0KB10
BrandVishay
MYR321.663
Each (In a Box of 10)
units
- - - - - - - - - - - - - -
RS Stock No. 892-4935
Mfr. Part No.D50K2R0E
BrandOhmite
MYR88.30
Each
units
±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm +350°C
RS Stock No. 892-4796
Mfr. Part No.D12K5K0E
BrandOhmite
MYR58.55
Each
units
5kΩ ±10% 12W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D12 7.94 x 44.4mm 7.94mm 44.4mm +350°C
RS Stock No. 893-5119
Mfr. Part No.D75K250
BrandOhmite
MYR98.715
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. 892-5746
Mfr. Part No.D25K150E
BrandOhmite
MYR56.93
Each
units
150Ω ±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm +350°C
RS Stock No. 892-4866
Mfr. Part No.D25K15RE
BrandOhmite
MYR63.31
Each
units
15Ω ±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm +350°C
RS Stock No. 892-8278
Mfr. Part No.D25K500E
BrandOhmite
MYR58.20
Each
units
500Ω ±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm +350°C
RS Stock No. 892-4765
Mfr. Part No.D12K10RE
BrandOhmite
MYR56.78
Each
units
10Ω ±10% 12W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D12 7.94 x 44.4mm 7.94mm 44.4mm +350°C
RS Stock No. 167-9819
Mfr. Part No.RA20117A470R0KB10
BrandVishay
MYR275.934
Each (In a Box of 10)
units
- - - - - - - - - - - - - -