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. 788-7738
Mfr. Part No.RSSD20117A1R00KB15
BrandVishay
€43.74
Each
units
10% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm +450°C
RS Stock No. 893-0912
Mfr. Part No.E300K3R1E
BrandOhmite
€34.78
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. 161-7574
Mfr. Part No.ZC3/11-FT
BrandCressall
€92.05
Each
units
2.2Ω ±10% - - Screw - Wire Wound Bolt On - ZC - - 330mm +50°C
RS Stock No. 892-6685
Mfr. Part No.D25K400E
BrandOhmite
€12.67
Each
units
400Ω ±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm +350°C
RS Stock No. 892-4724
Mfr. Part No.D100K10RE
BrandOhmite
€25.63
Each
units
10Ω ±10% 100W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D100 19.1 x 165.1mm 19.1mm 165.1mm +350°C
RS Stock No. 892-4853
Mfr. Part No.D225K50RE
BrandOhmite
€35.05
Each
units
50Ω ±10% 225W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm +350°C
RS Stock No. 892-4878
Mfr. Part No.D25K1K5E
BrandOhmite
€13.09
Each
units
1.5kΩ ±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm +350°C
RS Stock No. 893-0928
Mfr. Part No.E300K8R0E
BrandOhmite
€41.30
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. 892-4888
Mfr. Part No.D25K25KE
BrandOhmite
€12.28
Each
units
25kΩ ±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm +350°C
RS Stock No. 892-4828
Mfr. Part No.D225K1R0E
BrandOhmite
€48.13
Each
units
±10% 225W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm +350°C
RS Stock No. 144-5504
Mfr. Part No.D100K2R0E
€28.58
Each
units
±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. 892-4890
Mfr. Part No.D25K2K0E
BrandOhmite
€13.09
Each
units
2kΩ ±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm +350°C
RS Stock No. 788-7797
Mfr. Part No.RSSD30250A4R70KB06
BrandVishay
€51.92
Each
units
4.7Ω 10% 280W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 32 (Dia.) x 250mm 32mm 250mm +450°C
RS Stock No. 892-4904
Mfr. Part No.D25K2R0E
BrandOhmite
€13.51
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. 892-4793
Mfr. Part No.D175K100E
BrandOhmite
€28.48
Each
units
100Ω ±10% 175W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D175 28.6 x 215.9mm 28.6mm 215.9mm +350°C
RS Stock No. 892-5749
Mfr. Part No.D12K10KE
BrandOhmite
€10.988
Each (In a Pack of 25)
units
10kΩ ±10% 12W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D12 7.94 x 44.4mm 7.94mm 44.4mm +350°C
RS Stock No. 892-8335
Mfr. Part No.D100K2K5E
BrandOhmite
€23.01
Each
units
2.5kΩ ±10% 100W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D100 19.1 x 165.1mm 19.1mm 165.1mm +350°C
RS Stock No. 161-7569
Mfr. Part No.ZC3/5-FT
BrandCressall
€121.12
Each
units
490mΩ ±10% - - Screw - Wire Wound Bolt On - ZC - - 330mm +50°C
RS Stock No. 788-7756
Mfr. Part No.RSSD25168A10R0JB06
BrandVishay
€43.56
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. 893-5103
Mfr. Part No.D25K7K0
BrandOhmite
€10.677
Each (In a Pack of 25)
units
7kΩ ±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm +350°C
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