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. 788-7797
Mfr. Part No.RSSD30250A4R70KB06
BrandVishay
kr 538,38
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. 788-7740
Mfr. Part No.RSSD20117A4R70KB15
BrandVishay
kr 274,87
Each
Units
4.7 Ω 10% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm +450°C
RS Stock No. 788-7781
Mfr. Part No.RSSD30250A10R0JB06
BrandVishay
kr 566,40
Each
Units
10 Ω 5% 280W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 32 (Dia.) x 250mm 32mm 250mm +450°C
RS Stock No. 788-7784
Mfr. Part No.RSSD30250A22R0JB06
BrandVishay
kr 554,23
Each
Units
22 Ω 5% 280W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 32 (Dia.) x 250mm 32mm 250mm +450°C
RS Stock No. 788-7790
Mfr. Part No.RSSD30250A47R0JB06
BrandVishay
kr 548,45
Each
Units
47 Ω 5% 280W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 32 (Dia.) x 250mm 32mm 250mm +450°C
RS Stock No. 788-7734
Mfr. Part No.RSSD20117A10R0JB15
BrandVishay
kr 281,65
Each
Units
10 Ω 5% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm +450°C
RS Stock No. 892-4787
Mfr. Part No.D12K50RE
BrandOhmite
kr 149,25
Each
Units
50 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. 893-1069
Mfr. Part No.D225K30R-B
BrandOhmite
kr 112,637
Each (In a Pack of 25)
Units
30 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. 892-4923
Mfr. Part No.D50K25RE
BrandOhmite
kr 155,93
Each
Units
25 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. 167-9819
Mfr. Part No.RA20117A470R0KB10
BrandVishay
kr 629,336
Each (In a Box of 10)
Units
- - - - - - - - - - - - - -
RS Stock No. 144-5508
Mfr. Part No.D50K5R0E
kr 198,40
Each
Units
5 Ω ±10% 50W ±260ppm/°C Solder - Wire Wound Bolt On Vitreous Enamel 210 14.3 (Dia.) x 101.6mm 14.3mm 101.6mm +350°C
RS Stock No. 892-4926
Mfr. Part No.D50K20KE
BrandOhmite
kr 172,48
Each
Units
20 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. 893-5112
Mfr. Part No.D25K7K0E
BrandOhmite
kr 96,143
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. 893-5519
Mfr. Part No.D225K250E-B
BrandOhmite
kr 105,999
Each (In a Pack of 50)
Units
250 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. 892-4963
Mfr. Part No.D75K25RE
BrandOhmite
kr 217,84
Each
Units
25 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. 788-7716
Mfr. Part No.RSSD10X50A10R0JS06
BrandVishay
kr 162,61
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. 892-4929
Mfr. Part No.D50K250E
BrandOhmite
kr 155,93
Each
Units
250 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. 892-4730
Mfr. Part No.D100K250E
BrandOhmite
kr 221,13
Each
Units
250 Ω ±10% 100W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D100 19.1 x 165.1mm 19.1mm 165.1mm +350°C
RS Stock No. 893-0930
Mfr. Part No.E300KR20E
BrandOhmite
kr 422,27
Each (In a Pack of 5)
Units
200 mΩ ±10% 300W ±400ppm/°C - - - Bolt On, Bracket Vitreous Enamel E300 28.58 x 215.9mm 28.58mm 215.9mm +400°C
RS Stock No. 892-4910
Mfr. Part No.D25K5R0E
BrandOhmite
kr 131,40
Each
Units
5 Ω ±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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