Trimmer Resistors

What are trimmer potentiometers?


Trimmer potentiometers, sometimes referred to as trim pots or trimmer resistors are a type of adjustable potentiometer (variable resistor). They are used to calibrate and fine-tune circuits. Trimmer potentiometers are typically constructed from cermet or have a carbon composition. They can be mounted directly onto PCBs (printed circuit boards).


Trimmer potentiometers are not adjusted very frequently. You can think of them as a ’set and forget’ component. Trim pots let you set (or trim) the resistance to obtain a very precise current, output voltage or gain. Once the value has been set, it is unlikely that you’ll need to adjust the trimmer again unless you need to recalibrate the circuit.


Can I replace a normal potentiometer with a trimmer potentiometer?


Yes, you can. However, trimmer potentiometers are typically more expensive than standard potentiometers with a fixed resistance rating. It is also worth bearing in mind the difference in lifespan too. Many potentiometers have a lifespan that allows for hundreds of thousands of cycles. Trimmer potentiometers typically have a lifespan of a few hundred cycles (at best). Trim pots also tend to take up more space on a PCB than a standard potentiometer.


Do I need a single turn or multiturn trim pot?


This completely depends on the intended application of the trim pot. Multiturn trimmer pots tend to have a higher resolution than single turn models. A single turn trimmer potentiometer is ideal for applications where a resolution of one turn is enough.


Adjustment types


Trimmer potentiometers are normally adjusted by hand (you can turn the adjustment knob with your fingers), with a screwdriver or with a specialised adjustment tool designed for use with a particular model or series.


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Description Price Maximum Resistance Mounting Type Number of Turns Orientation Power Rating Series Termination Style Length Tolerance Depth Temperature Coefficient Height Dimensions Maximum Voltage Rating
RS Stock No. 154-2555
Mfr. Part No.M63M104KB30T607
BrandVishay
MYR20.44
Each
units
100 kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-9650
Mfr. Part No.M63M104KB30T607
BrandVishay
MYR11.582
Each (In a Box of 400)
units
100 kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -
RS Stock No. 788-5069
Mfr. Part No.T93YA101KT20
BrandVishay
MYR7.886
Each (In a Pack of 5)
units
100 Ω Through Hole 21 Top Adjust 0.5W T93 Pin 9.7mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-9990
Mfr. Part No.T93YA101KT20
BrandVishay
MYR5.145
Each (In a Tube of 50)
units
100 Ω Through Hole 21 Top Adjust 0.5W T93 Pin 9.7mm ±10% - ±100ppm/°C - - -
RS Stock No. 788-5063
Mfr. Part No.T93YA501KT20
BrandVishay
MYR6.50
Each (In a Pack of 5)
units
500 Ω Through Hole 21 Top Adjust 0.5W T93 Pin 9.7mm ±10% - - - - -
RS Stock No. 167-9946
Mfr. Part No.T93YA501KT20
BrandVishay
MYR5.527
Each (In a Tube of 50)
units
500 Ω Through Hole 21 Top Adjust 0.5W T93 Pin 9.7mm ±10% - - - - -
RS Stock No. 167-9373
Mfr. Part No.T7YB101MT20
BrandVishay
MYR4.972
Each (In a Tube of 50)
units
100 Ω Through Hole 1 Top Adjust 0.5W T7 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 374-6866
Mfr. Part No.T7YB101MT20
BrandVishay
MYR13.072
Each (In a Pack of 5)
units
100 Ω Through Hole 1 Top Adjust 0.5W T7 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 169-3140
Mfr. Part No.T63YB103KT20
BrandVishay
MYR9.888
Each (In a Tube of 50)
units
10 kΩ Through Hole 14 Top Adjust 0.25W T63 Pin 6.8mm ±10% - ±100ppm/°C - - -
RS Stock No. 169-3117
Mfr. Part No.M63M103KB40
BrandVishay
MYR14.464
Each (In a Box of 200)
units
10 kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -
RS Stock No. 788-5108
Mfr. Part No.T93YB102KT20
BrandVishay
MYR6.08
Each (In a Pack of 5)
units
1 kΩ Through Hole 21 Top Adjust 0.5W T93 Pin 9.7mm ±10% - ±100ppm/°C - - -
RS Stock No. 154-2246
Mfr. Part No.M64X103KB40
BrandVishay
MYR11.38
Each
units
10 kΩ Through Hole 19 (Electrical), 22 (Mechanical) Side Adjust 1/2W 64X Pin 11mm ±10% 5mm ±100ppm/°C 9.8mm 11 x 5 x 9.8mm -
RS Stock No. 183-1344
Mfr. Part No.M63M103KB40
BrandVishay
MYR30.12
Each
units
10 kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -
RS Stock No. 169-3093
Mfr. Part No.M64X103KB40
BrandVishay
MYR9.02
Each (In a Box of 200)
units
10 kΩ Through Hole 19 (Electrical), 22 (Mechanical) Side Adjust 0.5W 64X Pin 11mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-9958
Mfr. Part No.T93YB102KT20
BrandVishay
MYR5.273
Each (In a Tube of 50)
units
1 kΩ Through Hole 21 Top Adjust 0.5W T93 Pin 9.7mm ±10% - ±100ppm/°C - - -
RS Stock No. 374-7077
Mfr. Part No.T63YB103KT20
BrandVishay
MYR16.84
Each
units
10 kΩ Through Hole 14 Top Adjust 0.25W T63 Pin 6.8mm ±10% - ±100ppm/°C - - -
RS Stock No. 169-3080
Mfr. Part No.M64W103KB40
BrandVishay
MYR8.10
Each (In a Box of 200)
units
10 kΩ Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 0.5W 64W Pin 9.7mm ±10% - ±100ppm/°C - - -
RS Stock No. 154-2353
Mfr. Part No.M64Y101KB40
BrandVishay
MYR9.50
Each
units
100 Ω Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 1/2W 64Y Pin 9.7mm ±10% 5mm ±100ppm/°C 11.1mm 9.7 x 5 x 11.1mm -
RS Stock No. 169-3096
Mfr. Part No.M64X104KB40
BrandVishay
MYR9.723
Each (In a Box of 200)
units
100 kΩ Through Hole 19 (Electrical), 22 (Mechanical) Side Adjust 0.5W 64X Pin 11mm ±10% - ±100ppm/°C - - -
RS Stock No. 154-2050
Mfr. Part No.M64W103KB40
BrandVishay
MYR10.59
Each
units
10 kΩ Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 1/2W 64W Pin 9.7mm ±10% 5mm ±100ppm/°C 11.1mm 9.7 x 5 x 11.1mm -