PTA6043-2010CIA203 20K Audio Slide Potentiometer With 60mm Travel

ElecSuppliers Part Number GuideAug 28, 2026

A slide potentiometer is more than a variable resistor with a long handle. The travel length, resistance taper, mechanical profile and mounting style determine how the control feels and how easily it can replace an existing component.

The Bourns PTA6043-2010CIA203 is a particularly recognizable example because it combines a 20 kΩ audio taper, 60 mm travel and low-profile construction in the PTA series. It is designed for applications where a long physical control range is more useful than the compact dimensions of a short-travel potentiometer.

The 60mm Travel Is the Defining Feature

The first specification worth noticing is the 60 mm travel.

Many slide potentiometers used for panel controls have substantially shorter travel. The PTA6043-2010CIA203 uses almost the full 75 mm body length to provide a 60 mm electrical adjustment path. Its overall dimensions are approximately 75 mm × 9 mm × 6.5 mm.

That gives the user a much larger physical movement between minimum and maximum settings.

For audio equipment, this can make level adjustments easier to see and control. It is also useful when a front panel needs a long, clearly visible slider rather than a small rotary control.

Why the 20K Value Is Not the Whole Story

PTA6043-2010CIA203 has a nominal resistance of 20 kΩ with a ±20% tolerance. More importantly, it uses an audio taper rather than a linear taper.

This distinction matters.

A linear potentiometer changes resistance approximately proportionally with slider position.

An audio taper is designed around the way human hearing perceives changes in signal level.

That makes the PTA6043-2010CIA203 more appropriate for applications such as audio level controls than a mechanically similar 20 kΩ linear slide potentiometer.

So searching for a replacement based only on "20K 60mm slide potentiometer" is not enough.

The taper must match.

The Carbon Element Helps Explain Its Position in the PTA Series

The PTA6043-2010CIA203 uses a carbon resistive element and a metal housing. The PTA family is positioned by Bourns as a low-profile slide potentiometer series covering applications such as audio equipment, amplifiers, mixers, synthesizers, car radios and other panel controls.

The carbon element is particularly relevant when comparing this part with higher-end conductive-plastic slide potentiometers.

The choice is not simply about resistance value.

Element technology influences electrical characteristics, durability, cost and the intended application environment.

For a conventional audio control where a 60 mm fader is required, the PTA6043-2010CIA203 represents a straightforward carbon-track solution.

The 0.125W Rating Should Not Be Read Like a Power Resistor

The part is rated at 0.125 W, or 1/8 W.

That figure is easy to misunderstand.

A slide potentiometer used as an audio level control is normally handling a signal rather than dissipating large amounts of power.

The 1/8 W rating therefore does not mean the component is intended to behave like a 1/8 W power resistor continuously carrying substantial current.

If the potentiometer is being used in an unusual circuit where significant current flows through the resistive track, the actual power distribution across the element needs to be considered.

Low Profile Does Not Mean Short Travel

One interesting characteristic of this model is the combination of low-profile construction and 60 mm travel.

Mouser identifies the PTA6043-2010CIA203 as a low-profile slide potentiometer with a 6.5 mm height, while the travel reaches 60 mm.

That combination is useful in equipment where the front-panel control needs to move a long distance but the PCB assembly cannot accommodate a tall component.

This is one of the more meaningful reasons to choose the PTA6043 rather than simply selecting any 60 mm fader.

PCB Mounting Changes How the Part Is Installed

The PTA6043-2010CIA203 uses PC pin terminals and is intended for PCB mounting.

That means the mechanical mounting and electrical connection are integrated into the PCB design.

For replacement work, the footprint is therefore important.

A panel-mounted potentiometer with wires may have the same 20 kΩ resistance and 60 mm travel but still be unsuitable because the terminal arrangement and mechanical mounting are different.

This is especially important when repairing audio equipment where the original PCB has been designed around the exact fader footprint.

What the Model Number Tells the Buyer

The complete part number is important because Bourns offers many PTA series variants.

A nearby model can have a different resistance, taper or travel while retaining a very similar physical appearance.

For example, the PTA family includes versions with 15 mm, 30 mm and 60 mm travel, as well as both linear and audio taper configurations.

That makes PTA6043-2010CIA203 much more useful as a purchasing reference than a generic description such as "Bourns 20K slider."

The exact model preserves the electrical and mechanical combination required by the original design.

Where PTA6043-2010CIA203 Fits Best

The specifications point strongly toward audio and panel-control applications.

Potential applications include:

Audio mixers

Amplifiers

Synthesizers

Car audio equipment

Electronic instruments

Control panels

Consumer audio equipment

The 60 mm travel gives the user a relatively large adjustment range, while the audio taper makes the resistance change better suited to perceived volume-type control.

A Common Replacement Mistake

One of the easiest mistakes is replacing PTA6043-2010CIA203 with a 20 kΩ linear potentiometer simply because the resistance value is correct.

Electrically, both may measure 20 kΩ from end to end.

Operationally, they can feel completely different.

The position of the slider will not produce the same perceived change in an audio signal if the taper is different.

A replacement should therefore match at least these four characteristics:

20 kΩ resistance

Audio taper

60 mm travel

PCB mounting configuration

The physical dimensions and terminal footprint should then be verified.

Its 15,000 Cycle Life Gives the Buyer Another Clue

Mouser lists a 15,000-cycle life for this particular component.

That number helps put the part into perspective.

This is a conventional carbon slide potentiometer intended for panel-control applications rather than a specialized high-cycle industrial fader.

If a control will be moved continuously thousands of times per day, a different potentiometer technology may deserve consideration.

For normal equipment controls, however, the specified life can be entirely reasonable depending on the expected operating profile.

How PTA6043-2010CIA203 Should Be Sourced

When purchasing this model, search the complete PTA6043-2010CIA203 number rather than only "PTA6043."

The PTA series contains many closely related parts, and small differences in travel, taper and resistance can create an apparently similar but functionally different component.

For production purchasing, it is also worth checking the manufacturer's full part number, packaging and supplier traceability.

ElecSuppliers can provide another supplier discovery route for buyers searching the exact PTA6043-2010CIA203 model.

The Real Reason to Choose This Model

PTA6043-2010CIA203 is not simply a 20 kΩ potentiometer.

Its value comes from the combination of 20 kΩ audio taper, 60 mm travel, carbon element, low-profile body and PCB mounting.

That combination makes it particularly relevant when a design needs the physical feel of a long audio fader without using a taller component.

For a replacement, matching the resistance alone is not enough. The taper and 60 mm mechanical travel are just as important to preserving the behavior of the original control.