PTA6043-2010CIA203 20K Audio Slide Potentiometer Explained

ElecSuppliers Part Number GuideAug 28, 2026

A long sliding control is immediately recognizable on an audio mixer, control console or other panel interface. Behind that familiar control is often a slide potentiometer that converts the physical position of the slider into a changing electrical resistance.

PTA6043-2010CIA203 is one such component. Manufactured by Bourns, it belongs to the PTA series of slide potentiometers and is specifically configured as a 20 kOhm audio taper potentiometer with 60 mm travel. Distributor specifications also identify it as a low-profile, through-hole component with a 0.125 W power rating and ±20% tolerance.

That combination makes this part quite different from a conventional rotary potentiometer. Its long mechanical travel and audio-oriented resistance characteristic are particularly relevant when the control needs to be operated by sliding a fader rather than turning a shaft.

The First Thing to Notice About PTA6043-2010CIA203

The most useful way to understand this part is to look at what its configuration says about its intended role.

It has a 20 kOhm resistance, a 60 mm travel, and an audio taper. The PTA series is also identified as a Pro Audio series by distributors.

Those three characteristics immediately point toward applications where a user needs a relatively long physical control and where the resistance change should correspond appropriately to human perception of audio level.

This is why a search for PTA6043-2010CIA203 is much more likely to be related to an audio mixer, fader assembly or control panel than to a general-purpose variable resistor.

Why 60 mm Travel Is Important

The 60 mm travel is one of the defining characteristics of PTA6043-2010CIA203.

Travel refers to the distance through which the slider can move.

A longer travel gives the user more physical distance to make adjustments. That can make small changes easier to perform than with a very short slider.

This matters in professional audio equipment because operators frequently need to make controlled level adjustments while watching several channels simultaneously.

The slider position becomes an important part of the user interface.

A 60 mm fader therefore provides a substantially different operating experience from a small rotary control or short-travel potentiometer.

What 20 kOhm Means in This Part

The resistance of PTA6043-2010CIA203 is 20 kOhm.

A potentiometer has a resistive track and a moving contact. As the slider moves, the resistance between the terminals changes.

The 20 kOhm value represents the nominal total resistance of the track.

It does not mean that the circuit will always see exactly 20 kOhm at the output. The actual resistance between the wiper and either end of the track depends on slider position.

For designers, the correct resistance value needs to be selected according to the surrounding circuit.

Replacing a 20 kOhm potentiometer with a substantially different resistance can change signal loading and circuit behavior.

Audio Taper Is More Than a Naming Detail

Another defining feature of PTA6043-2010CIA203 is its audio taper. Avnet identifies the track taper as Audio, while Mouser describes the part as a 20K AUDIO slide potentiometer.

This is important because human hearing does not perceive changes in sound level in a simple linear way.

An audio taper potentiometer is designed so that the electrical change across the slider is better suited to how people perceive changes in audio level.

For an audio fader, this can provide a more natural-feeling relationship between slider movement and perceived volume.

That is fundamentally different from selecting a slide potentiometer simply because it has the correct resistance value.

PTA6043-2010CIA203 as an Audio Fader

In an audio mixer, a fader allows the operator to adjust the level of a channel or signal path.

The slider is moved upward or downward while the potentiometer changes the electrical relationship within the circuit.

A part such as PTA6043-2010CIA203 is therefore not merely a variable resistor sitting on a PCB. It is part of the physical control interface.

Its 60 mm travel gives the fader a substantial operating range, while the audio taper is suited to level control applications.

This combination explains why the exact configuration matters when replacing a failed fader.

Through Hole Construction

PTA6043-2010CIA203 uses through-hole mounting with pin terminals.

This is an important consideration when integrating the component into a PCB.

The board needs to provide the correct hole positions and mechanical clearance for the potentiometer body and slider.

A surface-mount potentiometer may offer similar electrical functionality but still be unsuitable because the PCB construction and mechanical interface are different.

For an existing audio console or control board, the original mounting configuration should therefore be treated as part of the component specification.

Physical Size of the PTA6043-2010CIA203

The listed dimensions are approximately 75 mm long, 9 mm wide and 6.5 mm high for the rectangular body specification reported by distributors.

The overall mechanical envelope matters because a slide potentiometer occupies a different type of PCB space than a conventional rotary potentiometer.

The 60 mm travel also needs to remain accessible to the slider mechanism or external control cap.

When designing a replacement PCB, it is therefore important to consider both the electrical footprint and the physical movement of the control.

Where a 20K Audio Slide Potentiometer Makes Sense

PTA6043-2010CIA203 is particularly interesting in applications where the operator needs continuous manual control rather than a simple on/off function.

Possible uses include professional audio equipment, mixing consoles, audio control panels and other human-machine interfaces requiring a linear sliding control.

Bourns also positions its potentiometer products for professional audio and industrial panel-control applications.

The exact circuit determines whether the 20 kOhm audio taper is appropriate, but the mechanical design clearly targets applications where a fader-style interface is useful.

Why You Should Not Replace It With Any 20K Slider

This is one of the most important points when purchasing a replacement.

Two slide potentiometers can both be rated at 20 kOhm and still behave very differently.

One may use an audio taper while another uses a linear taper.

One may have 60 mm travel while another has 30 mm.

One may use through-hole pins while another uses a different mounting structure.

Even the power rating can differ.

For example, another PTA6043 variant, PTA6043-2010CIB203, is also a 20 kOhm 60 mm slide potentiometer but has a different power rating.

That illustrates why the complete MPN should be used when sourcing the original part.

PTA6043-2010CIA203 Versus a Linear Fader

The distinction between audio and linear taper is particularly important.

A linear taper changes resistance approximately proportionally with slider position.

An audio taper is shaped differently to provide a more suitable response for audio level control.

If an audio application originally uses an audio taper and a linear replacement is installed, the physical slider may still move normally, but the perceived level change across the slider can feel very different.

For this reason, "20K slide potentiometer" is not enough information to identify a suitable replacement.

The 0.125 W Rating

PTA6043-2010CIA203 is specified at 0.125 W or 1/8 W.

This rating should be interpreted in the context of how the potentiometer is being used.

A fader in an audio signal path generally handles relatively small signal power compared with a power-control component.

The potentiometer should nevertheless be operated within the manufacturer's specified conditions.

Designers should also consider how much current flows through the resistive element rather than assuming that the component can dissipate its rated power under every physical condition.

±20 Percent Tolerance

The listed resistance tolerance for PTA6043-2010CIA203 is ±20%.

That means the actual resistance of an individual component can differ from its nominal 20 kOhm value within the specified tolerance range.

For many user-interface and audio-control applications, such tolerance can be acceptable.

For precision analog circuits where resistance accuracy directly affects a calibrated measurement, a potentiometer with tighter tolerance or a different component architecture may be more appropriate.

The application should determine whether the tolerance is acceptable.

Why Bourns PTA Series Matters

PTA6043-2010CIA203 belongs to Bourns' PTA series, identified by distributors as the Pro Audio PTA family.

The series includes different resistance values, travel lengths and configurations.

This means the base PTA6043 designation alone does not tell the buyer everything needed to identify the correct component.

The suffix is important.

For procurement, the complete PTA6043-2010CIA203 should be retained rather than shortening the search to PTA6043.

A Practical Replacement Check

Suppose an audio console contains a damaged fader.

The first step is not to search for "Bourns 20K potentiometer."

Instead, record the complete part number from the existing component.

Then compare:

Resistance

Taper

Travel

Mounting style

Terminal configuration

Body dimensions

Power rating

Actuator dimensions

If all of those characteristics match, the candidate is much more likely to be mechanically and electrically suitable.

This approach is especially important for equipment with multiple faders that appear nearly identical but use different electrical configurations.

Is PTA6043-2010CIA203 Suitable for New Designs

The answer depends on the application rather than simply on its resistance value.

If a design needs a manually operated 60 mm audio fader, the PTA6043 configuration provides a useful combination of long travel, audio taper and PCB mounting.

For a compact device where space is extremely limited, however, a shorter-travel potentiometer may be more appropriate.

Likewise, if the circuit needs a digitally controlled adjustment, a mechanical potentiometer may not be the right solution at all.

The component should therefore be selected according to the control architecture rather than by resistance alone.

What Buyers Need to Know Before Ordering

For procurement, the most important information is the complete MPN PTA6043-2010CIA203.

Current distributor listings identify Bourns as the manufacturer and show the part as an active product.

Buyers should confirm the exact resistance, audio taper, 60 mm travel, through-hole construction and 0.125 W rating before placing an order.

It is also worth checking packaging and available quantity because distributor stock can change.

For production programs, manufacturer lead time should be evaluated separately from distributor stock.

Finding PTA6043-2010CIA203 Suppliers

When a buyer already knows the exact MPN, supplier discovery should start with PTA6043-2010CIA203, not with a generic search for audio potentiometers.

ElecSuppliers can provide another route for locating suppliers associated with the exact electronic component model.

That approach is useful when the goal is to compare sourcing options while keeping the original Bourns configuration as the reference.

For replacement work, the exact part number remains the most reliable identifier.

The Role of PTA6043-2010CIA203 in Audio Controls

PTA6043-2010CIA203 is a good example of why a potentiometer's application cannot be understood from resistance alone.

Its 20 kOhm value, audio taper, 60 mm travel, through-hole construction and low-profile form factor work together to define the component's role.

The long travel makes it suitable for a physical fader interface, while the audio taper makes the electrical response more appropriate for level-control applications.

For engineers, the key is matching those characteristics to the circuit and mechanical design.

For buyers, the key is preserving the full PTA6043-2010CIA203 MPN when searching for the original component or evaluating an alternative.