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庫存編號 892-4765
製造零件編號D12K10RE
BrandOhmite
HK$136.08
單位
10 Ω ±10% 12W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D12 7.94 x 44.4mm 7.94mm 44.4mm +350°C
RS庫存編號 161-7572
製造零件編號ZC3/9-FT
BrandCressall
HK$1,084.01
單位
1.26 Ω ±10% - - Screw - Wire Wound Bolt On - ZC - - 330mm +50°C
RS庫存編號 892-8366
製造零件編號D12K7R5E
BrandOhmite
HK$132.12
單位
7.5 Ω ±10% 12W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D12 7.94 x 44.4mm 7.94mm 44.4mm +350°C
RS庫存編號 892-4932
製造零件編號D50K2K0E
BrandOhmite
HK$170.55
單位
2 kΩ ±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm +350°C
RS庫存編號 892-4759
製造零件編號D100K50RE
BrandOhmite
HK$184.64
單位
50 Ω ±10% 100W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D100 19.1 x 165.1mm 19.1mm 165.1mm +350°C
RS庫存編號 893-0928
製造零件編號E300K8R0E
BrandOhmite
HK$334.15
單位
8 Ω ±10% 300W ±400ppm/°C - - - Bolt On, Bracket Vitreous Enamel E300 28.58 x 215.9mm 28.58mm 215.9mm +400°C
RS庫存編號 892-8533
製造零件編號D175K5R0E
BrandOhmite
HK$349.38
單位
5 Ω ±10% 175W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D175 28.6 x 215.9mm 28.6mm 215.9mm +350°C
RS庫存編號 892-4913
製造零件編號D50K10RE
BrandOhmite
HK$149.66
單位
10 Ω ±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm +350°C
RS庫存編號 892-4825
製造零件編號D225K1K0E
BrandOhmite
HK$280.24
單位
1 kΩ ±10% 225W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm +350°C
RS庫存編號 144-5505
製造零件編號D25K20RE
HK$128.27
單位
20 Ω ±10% 25W ±260ppm/°C Solder - Wire Wound Bolt On Vitreous Enamel 210 14.3 (Dia.) x 50.8mm 14.3mm 50.8mm +350°C
RS庫存編號 892-4724
製造零件編號D100K10RE
BrandOhmite
HK$245.82
單位
10 Ω ±10% 100W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D100 19.1 x 165.1mm 19.1mm 165.1mm +350°C
RS庫存編號 893-0943
製造零件編號E300KR31E
BrandOhmite
HK$413.978
/個 (每包:5個)
單位
310 mΩ ±10% 300W ±400ppm/°C - - - Bolt On, Bracket Vitreous Enamel E300 28.58 x 215.9mm 28.58mm 215.9mm +400°C
RS庫存編號 892-4901
製造零件編號D25K5K0E
BrandOhmite
HK$140.08
單位
5 kΩ ±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm +350°C
RS庫存編號 893-0902
製造零件編號E300K16RE
BrandOhmite
HK$324.40
單位
16 Ω ±10% 300W ±400ppm/°C - - - Bolt On, Bracket Vitreous Enamel E300 28.58 x 215.9mm 28.58mm 215.9mm +400°C
RS庫存編號 892-4894
製造零件編號D25K2K5E
BrandOhmite
HK$137.00
單位
2.5 kΩ ±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm +350°C
RS庫存編號 788-7652
製造零件編號RSSD25168AR220MB06
BrandVishay
HK$790.70
單位
220 mΩ ±20% 200W ±75ppm/°C Radial BA25 - Bolt On Vitreous Enamel RSSD 27 (Dia.) x 168mm 27mm 168mm +450°C
RS庫存編號 788-7659
製造零件編號RSSD25168A2R20KB06
BrandVishay
HK$370.96
單位
2.2 Ω ±10% 200W - Radial BA25 - Bolt On Vitreous Enamel RSSD 27 (Dia.) x 168mm 27mm 168mm +450°C
RS庫存編號 892-4910
製造零件編號D25K5R0E
BrandOhmite
HK$135.73
單位
5 Ω ±10% 25W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D25 14.3 x 50.8mm 14.3mm 50.8mm +350°C
RS庫存編號 892-4812
製造零件編號D225K100E
BrandOhmite
HK$311.04
單位
100 Ω ±10% 225W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D225 28.6 x 266.7mm 28.6mm 266.7mm +350°C
RS庫存編號 788-7781
製造零件編號RSSD30250A10R0JB06
BrandVishay
HK$562.87
單位
10 Ω 5% 280W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 32 (Dia.) x 250mm 32mm 250mm +450°C