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 resistorAdjustable 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 Construction
RS Stock No. 892-8347
Mfr. Part No.D50K750E
BrandOhmite
£13.33
Each
Units
750Ω ±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm Wire Wound
RS Stock No. 892-8224
Mfr. Part No.D50K1K5E
BrandOhmite
£10.399
Each (In a Pack of 100)
Units
1.5kΩ ±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm Wire Wound
RS Stock No. 893-0915
Mfr. Part No.E300K20RE
BrandOhmite
£30.17
Each
Units
20Ω ±10% 300W ±400ppm/°C - - - Bolt On, Bracket Vitreous Enamel E300 28.58 x 215.9mm 28.58mm 215.9mm Wire Wound
RS Stock No. 892-4929
Mfr. Part No.D50K250E
BrandOhmite
£13.33
Each
Units
250Ω ±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm Wire Wound
RS Stock No. 892-4913
Mfr. Part No.D50K10RE
BrandOhmite
£13.33
Each
Units
10Ω ±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm Wire Wound
RS Stock No. 892-8451
Mfr. Part No.D50K200E
BrandOhmite
£13.33
Each
Units
200Ω ±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm Wire Wound
RS Stock No. 892-4932
Mfr. Part No.D50K2K0E
BrandOhmite
£14.76
Each
Units
2kΩ ±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm Wire Wound
RS Stock No. 891-8568
Mfr. Part No.D50K500E
BrandOhmite
£13.33
Each
Units
500Ω ±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm Wire Wound
RS Stock No. 893-5339
Mfr. Part No.D225K50RE-B
BrandOhmite
£11.50
Each
Units
50Ω ±10% 225W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm Wire Wound
RS Stock No. 892-4923
Mfr. Part No.D50K25RE
BrandOhmite
£13.33
Each
Units
25Ω ±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm Wire Wound
RS Stock No. 893-0928
Mfr. Part No.E300K8R0E
BrandOhmite
£29.78
Each
Units
±10% 300W ±400ppm/°C - - - Bolt On, Bracket Vitreous Enamel E300 28.58 x 215.9mm 28.58mm 215.9mm Wire Wound
RS Stock No. 892-4901
Mfr. Part No.D25K5K0E
BrandOhmite
£12.24
Each
Units
5kΩ ±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm Wire Wound
RS Stock No. 892-4853
Mfr. Part No.D225K50RE
BrandOhmite
£31.02
Each
Units
50Ω ±10% 225W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm Wire Wound
RS Stock No. 892-4844
Mfr. Part No.D225K500E
BrandOhmite
£26.62
Each
Units
500Ω ±10% 225W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm Wire Wound
RS Stock No. 892-4960
Mfr. Part No.D75K15RE
BrandOhmite
£19.09
Each
Units
15Ω ±10% 75W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D75 14.3 x 152.4mm 14.3mm 152.4mm Wire Wound
RS Stock No. 893-0918
Mfr. Part No.E300K2R0E
BrandOhmite
£30.93
Each
Units
±10% 300W ±400ppm/°C - - - Bolt On, Bracket Vitreous Enamel E300 28.58 x 215.9mm 28.58mm 215.9mm Wire Wound
RS Stock No. 892-4730
Mfr. Part No.D100K250E
BrandOhmite
£18.91
Each
Units
250Ω ±10% 100W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D100 19.1 x 165.1mm 19.1mm 165.1mm Wire Wound
RS Stock No. 892-4935
Mfr. Part No.D50K2R0E
BrandOhmite
£16.14
Each
Units
±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm Wire Wound
RS Stock No. 893-5421
Mfr. Part No.D12K75RE
BrandOhmite
£11.54
Each
Units
75Ω ±10% 12W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D12 7.94 x 44.4mm 7.94mm 44.4mm Wire Wound
RS Stock No. 892-4822
Mfr. Part No.D225K250E
BrandOhmite
£27.68
Each
Units
250Ω ±10% 225W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm Wire Wound