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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RS庫存編號 788-7766
製造零件編號RSSD25168A4R70KB06
BrandVishay
HK$452.56
單位
4.7 Ω 10% 200W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 27 (Dia.) x 168mm 27mm 168mm +450°C
RS庫存編號 788-7734
製造零件編號RSSD20117A10R0JB15
BrandVishay
HK$336.42
單位
10 Ω 5% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm +450°C
RS庫存編號 788-7716
製造零件編號RSSD10X50A10R0JS06
BrandVishay
HK$206.20
單位
10 Ω 5% 25W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 11.5 (Dia.) x 50mm 11.5mm 50mm +450°C
RS庫存編號 893-0930
製造零件編號E300KR20E
BrandOhmite
HK$460.624
/個 (每包:5個)
單位
200 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 788-7788
製造零件編號RSSD30250A3300JB06
BrandVishay
HK$400.00
單位
330 Ω 5% 280W - Radial BA25 Wire Wound Bolt On Vitreous Enamel RSSD 32 (Dia.) x 250mm 32mm 250mm +450°C
RS庫存編號 788-7744
製造零件編號RSSD20117A47R0JB15
BrandVishay
HK$205.00
單位
47 Ω 5% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm +450°C
RS庫存編號 788-7643
製造零件編號RSSD20117A2R20KB15
BrandVishay
HK$208.25
單位
2.2 Ω ±10% 100W - Radial BA25 Wire Wound Flange Mount Vitreous Enamel RSSD 22 (Dia.) x 117mm 22mm 117mm +450°C
RS庫存編號 167-9819
製造零件編號RA20117A470R0KB10
BrandVishay
HK$566.952
個 (以毎盒:10)
單位
- - - - - - - - - - - - - -
RS庫存編號 892-4954
製造零件編號D50K5K0E
BrandOhmite
HK$128.385
/個 (每包:25個)
單位
5 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 788-7841
製造零件編號RA20117A470R0KB10
BrandVishay
HK$760.00
單位
470 Ω ±10% 50W - Screw BO10 Wire Wound - - RA20117 - - - +350°C
RS庫存編號 788-7845
製造零件編號RA20117A10000KB10
BrandVishay
HK$851.12
單位
1 kΩ ±10% 50W - Screw BO10 Wire Wound - - RA20117 - - - +350°C
RS庫存編號 167-9773
製造零件編號RA20117A10000KB10
BrandVishay
HK$566.952
個 (以毎盒:10)
單位
- - - - - - - - - - - - - -
RS庫存編號 892-4862
製造零件編號D25K10RE
BrandOhmite
HK$97.84
單位
10 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 893-0946
製造零件編號E300KR50E
BrandOhmite
HK$394.20
單位
500 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 892-4866
製造零件編號D25K15RE
BrandOhmite
HK$88.14
單位
15 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 892-4894
製造零件編號D25K2K5E
BrandOhmite
HK$101.13
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 892-4869
製造零件編號D25K10KE
BrandOhmite
HK$106.92
單位
10 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 144-5504
製造零件編號D100K2R0E
HK$274.59
單位
2 Ω ±10% 100W ±260ppm/°C Solder - Wire Wound Bolt On Vitreous Enamel 210 19.1 (Dia.) x 165.1mm 19.1mm 165.1mm +350
RS庫存編號 892-4897
製造零件編號D25K25RE
BrandOhmite
HK$79.45
單位
25 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 892-4929
製造零件編號D50K250E
BrandOhmite
HK$125.93
單位
250 Ω ±10% 50W ±260ppm/°C - - - Bolt On, Bracket Vitreous Enamel D50 14.3 x 101.6mm 14.3mm 101.6mm +350°C