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. 892-4755
Mfr. Part No.D100K500E
BrandOhmite
kr 346,76
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. 167-9906
Mfr. Part No.RA20117A100R0KB10
BrandVishay
kr 629,336
Each (In a Box of 10)
Units
- - - - - - - - - - - - - -
RS Stock No. 788-7725
Mfr. Part No.RSSD10X50A1R00KS06
BrandVishay
kr 171,58
Each
Units
10% 25W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 11.5 (Dia.) x 50mm 11.5mm 50mm +450°C
RS Stock No. 893-0918
Mfr. Part No.E300K2R0E
BrandOhmite
kr 492,12
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. 161-7577
Mfr. Part No.ZC6/6-FT
BrandCressall
kr 1 229,60
Each
Units
1.31Ω ±10% - - Screw - Wire Wound Bolt On - ZC - - 555mm +50°C
RS Stock No. 892-8347
Mfr. Part No.D50K750E
BrandOhmite
kr 161,31
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. 893-5579
Mfr. Part No.D225K300-B
BrandOhmite
kr 107,367
Each (In a Pack of 50)
Units
300Ω ±10% 225W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm +350°C
RS Stock No. 892-8366
Mfr. Part No.D12K7R5E
BrandOhmite
kr 131,70
Each
Units
7.5Ω ±10% 12W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D12 7.94 x 44.4mm 7.94mm 44.4mm +350°C
RS Stock No. 892-6685
Mfr. Part No.D25K400E
BrandOhmite
kr 127,92
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. 892-4948
Mfr. Part No.D50K3R0E
BrandOhmite
kr 175,87
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. 892-4768
Mfr. Part No.D100K5R0E
BrandOhmite
kr 385,64
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. 892-1163
Mfr. Part No.E300K5R0E
BrandOhmite
kr 335,99
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. 892-4878
Mfr. Part No.D25K1K5E
BrandOhmite
kr 132,20
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. 892-4923
Mfr. Part No.D50K25RE
BrandOhmite
kr 155,93
Each
Units
25Ω ±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm +350°C
RS Stock No. 788-7769
Mfr. Part No.RSSD25168A2200JB06
BrandVishay
kr 424,52
Each
Units
220Ω 5% 200W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 27 (Dia.) x 168mm 27mm 168mm +450°C
RS Stock No. 892-4761
Mfr. Part No.D12K100E
BrandOhmite
kr 127,52
Each
Units
100Ω ±10% 12W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D12 7.94 x 44.4mm 7.94mm 44.4mm +350°C
RS Stock No. 892-4806
Mfr. Part No.D175K25RE
BrandOhmite
kr 319,54
Each
Units
25Ω ±10% 175W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D175 28.6 x 215.9mm 28.6mm 215.9mm +350°C
RS Stock No. 788-7750
Mfr. Part No.RSSD25168A1R00KB06
BrandVishay
kr 580,55
Each
Units
10% 200W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 27 (Dia.) x 168mm 27mm 168mm +450°C
RS Stock No. 892-4793
Mfr. Part No.D175K100E
BrandOhmite
kr 287,53
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. 161-7570
Mfr. Part No.ZC3/6-FT
BrandCressall
kr 975,27
Each
Units
650mΩ ±10% - - Screw - Wire Wound Bolt On - ZC - - 330mm +50°C
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