PDB182-K420K-203B Bourns Variable Resistor (Other) In Stock
PDB182-K420K-203B is a dual-gang 20kΩ panel-mount potentiometer from Bourns, designed for audio and control applications requiring simultaneous adjustment of two independent resistive elements with a single shaft.
- Manufacturer
- Bourns
- Package
- Other
- Pin Count
- 6
- Lifecycle
- ACTIVE
- Datasheet
- PDB182-K420K-203B Datasheet PDF
- Category
- Variable Resistor
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dual-gang configuration with 20kΩ resistance per section for simultaneous stereo or differential control
- Panel-mount K-taper design suited for front-panel volume and balance controls
- Robust construction supporting continuous rotation adjustments across typical -40°C to +85°C operating range
- Compact form factor compatible with standard potentiometer cutouts for easy retrofit and new designs
- 203B taper code for smooth audio-grade logarithmic feel during user adjustment
Applications
The PDB182-K420K-203B is commonly used in audio amplifiers and mixing consoles where a single knob must simultaneously control two 20kΩ signal paths, such as stereo volume or balance adjustment. Its dual-gang panel-mount design makes it appropriate for consumer electronics, musical instrument preamps, and industrial control panels that require synchronized dual-channel attenuation. The 20kΩ resistance value is also well matched to high-impedance audio inputs and op-amp feedback networks operating from ±15V or ±12V supply rails.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What resistance value and configuration does the PDB182-K420K-203B provide for stereo audio circuits?
The PDB182-K420K-203B provides 20kΩ per section in a dual-gang configuration, giving two mechanically coupled 20kΩ potentiometers that track together. This 20kΩ value matches the input impedance of most op-amp based audio stages and is sufficient for signal-level volume control without loading the source.
How does the K-taper on the PDB182-K420K-203B differ from a linear taper for volume control use?
A K-taper (audio or logarithmic taper) rolls off resistance faster at low rotation angles and more gradually at higher angles, matching human hearing's logarithmic perception of loudness. Compared to a linear taper, the K-taper across the 20kΩ range of the PDB182-K420K-203B gives a perceptually uniform volume change per degree of shaft rotation, which is the standard practice in audio amplifier design.
Can the PDB182-K420K-203B be used in industrial control panels operating over a wide temperature range?
Yes. Panel-mount potentiometers in this Bourns PDB series are rated for operation from -40°C to +85°C, covering most industrial environment requirements. The 20kΩ dual-gang design can be wired as a position feedback element or a manual setpoint control in PLC-driven systems where two channels must track a single mechanical input.
What shaft and mounting dimensions should PCB and panel designers verify before specifying the PDB182-K420K-203B?
Designers should confirm the panel cutout diameter (typically 6mm or 7mm for Bourns PDB182-series shafts), the shaft length, and the bushing thread size before ordering, as these dimensions determine drop-in compatibility with existing enclosures. Bourns datasheets specify total height, shaft travel of approximately 300° mechanical rotation, and the bushing nut torque specification, all of which affect mounting rigidity in vibrating environments.
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