Part Number: TC33X-2-203E

Manufacturer: Bourns Inc

Description: TRIMMER 100K OHM 0.1W J LEAD TOP

Shipped from: Shenzhen/HK Warehouse

Stock Available: Check with us

Technical Specifications of TC33X-2-203E

Datasheet  TC33X-2-203E datasheet
Category Potentiometers, Variable Resistors
Family Trimmer Potentiometers
Manufacturer Bourns Inc.
Series Trimpot? TC33 – Open Frame
Packaging Tape & Reel (TR)
Part Status Active
Resistance (Ohms) 20k
Power (Watts) 0.1W, 1/10W
Tolerance ±25%
Temperature Coefficient ±250ppm/°C
Number of Turns 1
Adjustment Type Top Adjustment
Resistive Material Cermet
Mounting Type Surface Mount
Termination Style J Lead
Size / Dimension Rectangular – 0.150″ x 0.142″ Face x 0.047″ H (3.80mm x 3.60mm x 1.20mm)

TC33X-2-203E Description

Bourns has created the TC33X-2-203E potentiometer to improve your circuit’s functionality and calibrate the resistance inside. The resistance value of this product comes in at 20K Ohm. This trustworthy component is rated at 0.1 (1/10) W in terms of its power output. The temperature coefficient for this substance is 250 ppm/°C. This item will be packaged in tape and reel form for shipment, allowing for more efficient mounting of the component parts. The TC33X-2-203E component utilizes a footprint termination approach. This component can be used in the temperature range from -40 to 100 degrees Celsius. This item has dimensions of 3.8 mm in length and 3 mm in width.

Electrical Characteristics

  • A resistance range of 100 ohms to 1 megohm is the norm
  • Resistant Tolerance is 25% standard.
  • 5% Contact Resistance Variation.
  • Adjustment An angle of 270° plus 20°

Environmental Characteristics

  • The maximum power rating at 50 VDC is 70 °C0.15 watts.
  • The range of temperatures is -40 °C to +100 °C.
  • A 250 ppm/°C temperature coefficient is used.
  • +40 2 °C, 90–95% RH humidity.
  • 5% TRS maximum.
  • Load Life is 1000 hours at rated power at 70 °C.

Physical Characteristics

  • Maximum torque is 0.98-11.76 mN-m.
  • The usual packaging is a 2500 pieces/7″ reel.
  • 9 N is the static pushing force.

Utilize an adjustment instrument with the following recommended measurement ranges: a cross slot of 1.7 millimeters (.067 of an inch) in width. Bourns does not carry the size of an adjustment tool specified by the manufacturer. If you require additional information, do not hesitate to contact a representative from Bourns.


● The use of water in the cleaning process is not recommended.

● It is not recommended to utilize flow soldering; instead, use reflow soldering.

● Caution should be exercised while working with flux when soldering, as the Model TC33 was not intended to be used with flux.

● Adjusting the Model TC33X-1 beyond the rotary angle that is effective is not something that is suggested.

● During the process of altering the resistance value, if an excessive force is given to the sliding portion (the working shaft), the sliding part has the potential to become deformed or even shattered.

What Exactly Is A Trimmer Potentiometer?

A trimmer potentiometer is a tiny electrical component that allows for fine-tuned adjustments. They are designed for situations where the value of a resistor is “set and forgotten.” Their purpose is to “trim” the value of the resistor to deliver an accurate gain, output voltage, or current. They are frequently used in precision electronics, such as AV components, instruments used for calibration, and the process of establishing the bias current on power amplifiers.

Trimmer potentiometers are set using a little screwdriver and are designed to require very few changes while they are in use. They are installed directly on circuit boards. They can either be single-turn or multi-turn, with the multi-turn variety being utilized in contexts that need more exact setting adjustments. They can also be mounted either vertically or horizontally, depending on the requirements for adjusting the component. This can be done in a variety of different orientations. In 1952, Marlan Bourns received a patent for the first trimming potentiometer, which he named the “Tripot.”

Trimmer Resistor Working Principle

This resistor has a rather straightforward method of operation if you want to know how it works. The element of resistance is a thin coating that has been placed on top of an insulator. If the contact end of the thin film is forced against the external connection pin, the current can flow through; however, if it is not pressed, the current cannot flow.

How are Trimmer Resistors Used?

The precise resistance value of a component may not be known or may not be able to be determined before the circuit is assembled and powered on, and this is when trimmer resistors are most commonly put to use. If you add an amplifier to your circuit, for example, you might find that you need to alter the resistance value of your resistor to eliminate any static or background noise.

What is a Potentiometer Driver Cell?

When a voltage is applied across the resistance of a potentiometer, a precise measurement of that value can be obtained by using the potentiometer to measure the voltage. A voltage source must be connected across the component of the circuit containing the potentiometer to function properly. Because it is the cell that supplies the source voltage necessary to spin the dial of the potentiometer, it is referred to as the “driving cell,” thus giving rise to the name. At last, the driver cell will use the resistance provided by the potentiometer to supply the required amount of current for the load.

The full-scale voltage of the device can be calculated by multiplying the current that was measured by the resistance of the potentiometer. Changing the voltage setting on the potentiometer will result in a change in the sensitivity of the instrument. Changing the amount of current flowing through the resistance is the typical method to accomplish this goal. The user can alter the quantity of current flowing through the resistance by using a rheostat that has been linked in series with the driver cell. If an accurate measurement is to be obtained, the voltage of the driver cell needs to be higher than the value that is being measured.


The TC33X-2-203E potentiometer from Bourns was made to adjust your circuit’s internal resistance precisely. This product has an extremely high resistance of 20K Ohm. This dependable part has a power rating of 0.1 (1/10) W. As a function of temperature, this chemical exhibits a coefficient of 250 ppm/°C. Tape and reel packaging will be used for shipping, facilitating easier assembly once the product arrives. The TC33X-2-203E module takes a footprint termination method. This part can function between -40 and 100 degrees Celsius. The length and width of this item, respectively, are 3.8 mm and 3 mm.

If you wish to order TC33X-2-203E, Give us a call at ICRFQ. We are a leading electronic components distributor in China, and we will ensure you receive the best goods at a reasonable price.

4.8/5 - (397 votes)
Kevin Chen