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. 167-9379
Mfr. Part No.T7YB103MT20
BrandVishay
PHP82.30
Each (In a Tube of 50)
units
10kΩ Through Hole 1 Top Adjust 0.5W T7 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 167-9951
Mfr. Part No.T93YA503KT20
BrandVishay
PHP55.692
Each (In a Tube of 50)
units
50kΩ Through Hole 21 Top Adjust 0.5W T93 Pin 9.7mm ±10% - - - - -
RS Stock No. 374-6923
Mfr. Part No.T7YB103MT20
BrandVishay
PHP95.90
Each (In a Pack of 5)
units
10kΩ Through Hole 1 Top Adjust 0.5W T7 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 788-5085
Mfr. Part No.T93YA503KT20
BrandVishay
PHP66.402
Each (In a Pack of 5)
units
50kΩ Through Hole 21 Top Adjust 0.5W T93 Pin 9.7mm ±10% - - - - -
RS Stock No. 788-5123
Mfr. Part No.T93YB203KT20
BrandVishay
PHP76.582
Each (In a Pack of 5)
units
20kΩ Through Hole 21 (Electrical) Turns, 23 (Mechanical) Turns Top Adjust 0.5W T93 Pin 9.7mm ±10% - - - - -
RS Stock No. 167-9963
Mfr. Part No.T93YB203KT20
BrandVishay
PHP58.905
Each (In a Tube of 50)
units
20kΩ Through Hole 21 (Electrical) Turns, 23 (Mechanical) Turns Top Adjust 0.5W T93 Pin 9.7mm ±10% - - - - -
RS Stock No. 167-9373
Mfr. Part No.T7YB101MT20
BrandVishay
PHP55.174
Each (In a Tube of 50)
units
100Ω Through Hole 1 Top Adjust 0.5W T7 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 169-3105
Mfr. Part No.M64Y203KB40
BrandVishay
PHP121.28
Each (In a Box of 200)
units
20kΩ Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 0.5W 64Y Pin 9.7mm ±10% - - - - -
RS Stock No. 154-2022
Mfr. Part No.M64W102KB40
BrandVishay
PHP144.38
Each
units
1kΩ 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 -
RS Stock No. 154-2448
Mfr. Part No.M64Y203KB40
BrandVishay
PHP153.83
Each
units
20kΩ Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 1/2W 64Y Pin 9.7mm ±10% 5mm - 11.1mm 9.7 x 5 x 11.1mm -
RS Stock No. 169-3076
Mfr. Part No.M64W102KB40
BrandVishay
PHP114.45
Each (In a Box of 200)
units
1kΩ Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 0.5W 64W Pin 9.7mm ±10% - ±100ppm/°C - - -
RS Stock No. 167-9445
Mfr. Part No.TS53YJ104MR10
BrandVishay
PHP51.194
Each (On a Reel of 500)
units
100kΩ Surface Mount 1 Top Adjust 0.25W TS53 J-Hook 5mm ±20% - ±100ppm/°C - - -
RS Stock No. 374-6866
Mfr. Part No.T7YB101MT20
BrandVishay
PHP145.054
Each (In a Pack of 5)
units
100Ω Through Hole 1 Top Adjust 0.5W T7 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 486-7661
Mfr. Part No.TS53YJ104MR10
BrandVishay
PHP93.98
Each (In a Pack of 5)
units
100kΩ Surface Mount 1 Top Adjust 0.25W TS53 J-Hook 5mm ±20% - ±100ppm/°C - - -
RS Stock No. 167-9649
Mfr. Part No.M63M103KB30T607
BrandVishay
PHP123.60
Each (In a Box of 400)
units
10kΩ Through Hole 1 Top Adjust 0.5W 63M Pin 9.52mm ±10% - ±100ppm/°C - - -
RS Stock No. 374-6939
Mfr. Part No.T7YB223MT20
BrandVishay
PHP103.188
Each (In a Pack of 5)
units
22kΩ Through Hole 1 Top Adjust 0.5W T7 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 167-9380
Mfr. Part No.T7YB223MT20
BrandVishay
PHP57.40
Each (In a Tube of 50)
units
22kΩ Through Hole 1 Top Adjust 0.5W T7 Pin - ±10% - ±100ppm/°C - - -
RS Stock No. 169-3081
Mfr. Part No.M64W503KB40
BrandVishay
PHP100.80
Each (In a Box of 200)
units
50kΩ Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 0.5W 64W Pin 9.7mm ±10% - - - - -
RS Stock No. 154-2549
Mfr. Part No.M63M103KB30T607
BrandVishay
PHP177.20
Each
units
10kΩ Through Hole 1 Finger Adjust 1/2W 63M-T607 Pin 9.52mm ±10% 9.52mm ±100ppm/°C 10.41mm 9.52 x 9.52 x 10.41mm -
RS Stock No. 154-2066
Mfr. Part No.M64W503KB40
BrandVishay
PHP147.53
Each
units
50kΩ Through Hole 19 (Electrical), 22 (Mechanical) Top Adjust 1/2W 64W Pin 9.7mm ±10% 5mm - 11.1mm 9.7 x 5 x 11.1mm -