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 Construction
RS Stock No. 788-7734
Mfr. Part No.RSSD20117A10R0JB15
BrandVishay
£24.97
Each
Units
10Ω ±5% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm Wire Wound
RS Stock No. 788-7788
Mfr. Part No.RSSD30250A3300JB06
BrandVishay
£52.05
Each
Units
330Ω ±5% 280W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 32 (Dia.) x 250mm 32mm 250mm Wire Wound
RS Stock No. 788-7731
Mfr. Part No.RSSD20117A1000JB15
BrandVishay
£24.97
Each
Units
100Ω ±5% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm Wire Wound
RS Stock No. 788-7769
Mfr. Part No.RSSD25168A2200JB06
BrandVishay
£37.20
Each
Units
220Ω ±5% 200W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 27 (Dia.) x 168mm 27mm 168mm Wire Wound
RS Stock No. 788-7775
Mfr. Part No.RSSD25168A47R0JB06
BrandVishay
£37.20
Each
Units
47Ω ±5% 200W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 27 (Dia.) x 168mm 27mm 168mm Wire Wound
RS Stock No. 788-7753
Mfr. Part No.RSSD25168A1000JB06
BrandVishay
£38.55
Each
Units
100Ω ±5% 200W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 27 (Dia.) x 168mm 27mm 168mm Wire Wound
RS Stock No. 788-7728
Mfr. Part No.RSSD10X50A22R0JS06
BrandVishay
£14.93
Each
Units
22Ω ±5% 25W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 11.5 (Dia.) x 50mm 11.5mm 50mm Wire Wound
RS Stock No. 788-7744
Mfr. Part No.RSSD20117A47R0JB15
BrandVishay
£24.08
Each
Units
47Ω ±5% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm Wire Wound
RS Stock No. 892-8347
Mfr. Part No.D50K750E
BrandOhmite
£17.93
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. 788-7643
Mfr. Part No.RSSD20117A2R20KB15
BrandVishay
£19.75
Each
Units
2.2Ω ±10% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm Wire Wound
RS Stock No. 788-7781
Mfr. Part No.RSSD30250A10R0JB06
BrandVishay
£49.61
Each
Units
10Ω ±5% 280W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 32 (Dia.) x 250mm 32mm 250mm Wire Wound
RS Stock No. 788-7756
Mfr. Part No.RSSD25168A10R0JB06
BrandVishay
£38.55
Each
Units
10Ω ±5% 200W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 27 (Dia.) x 168mm 27mm 168mm Wire Wound
RS Stock No. 788-7790
Mfr. Part No.RSSD30250A47R0JB06
BrandVishay
£46.50
Each
Units
47Ω ±5% 280W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 32 (Dia.) x 250mm 32mm 250mm Wire Wound
RS Stock No. 788-7762
Mfr. Part No.RSSD25168A22R0JB06
BrandVishay
£37.20
Each
Units
22Ω ±5% 200W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 27 (Dia.) x 168mm 27mm 168mm Wire Wound
RS Stock No. 788-7747
Mfr. Part No.RSSD20117A22R0JB15
BrandVishay
£24.97
Each
Units
22Ω ±5% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm Wire Wound
RS Stock No. 892-8224
Mfr. Part No.D50K1K5E
BrandOhmite
£11.132
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
£39.83
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. 788-7659
Mfr. Part No.RSSD25168A2R20KB06
BrandVishay
£33.06
Each
Units
2.2Ω ±10% 200W - Radial BA25 - Bolt On Vitreous Enamel RSSD 27 (Dia.) x 168mm 27mm 168mm Wire Wound
RS Stock No. 892-4929
Mfr. Part No.D50K250E
BrandOhmite
£13.96
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. 144-5509
Mfr. Part No.D50K75RE
£14.72
Each
Units
75Ω ±10% 50W ±260ppm/°C Solder - Wire Wound Bolt On Vitreous Enamel 210 14.3 (Dia.) x 101.6mm 14.3mm 101.6mm Wire Wound
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