Description
Replacement Volume Control Knob
OEM replacement volume and power control knob for commercial portable radios.
The Motorola PMDN4102AR (also designated as PMDN4102) is a genuine OEM replacement volume control knob designed for Motorola commercial portable two-way radios. Engineered to fit onto the top potentiometer D-shaft, the Motorola PMDN4102AR restores smooth tactile control over radio power state and speaker volume adjustment.
Daily field use, harsh job site environments, and accidental drops can cause control knobs to crack, loosen, or wear smooth. Installing a fresh Motorola PMDN4102AR volume knob ensures non-slip operation even when wearing heavy work gloves, preserving precise volume levels and preventing accidental power-offs during critical shifts.
Key Features & Benefits
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Direct OEM Factory Replacement: Exact fitment and color match for original Motorola radio housing specifications.
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Motorola PMDN4102AR Tactile Grip: Textured ridged exterior provides secure rotational grip in wet or gloved conditions.
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Secure D-Shaft Mounting: Molded internal socket slides firmly onto the potentiometer shaft without slipping or wobble.
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High-Impact Polymer Construction: Built from durable industrial-grade plastic to withstand daily impact and UV exposure.
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White Position Indicator: Molded white line mark allows fast visual confirmation of volume setting and power status.
Specifications
| Attribute |
Details |
| Brand |
Motorola Solutions |
| Model/SKU |
PMDN4102AR (PMDN4102) |
| Product Type |
Volume / Power Control Knob |
| Material |
High-Impact Molded Polymer |
| Color |
Black with White Indicator Mark |
| Mount Type |
Push-On Potentiometer D-Shaft |
Compatibility
Radios
Recommended Accessories
Compatible Portable Radios
Batteries & Audio Accessories
More Resources
Frequently Asked Questions
What is the primary function of the Motorola PMDN4102AR knob?
The Motorola PMDN4102AR is a replacement knob that attaches to the volume potentiometer shaft to turn the radio on/off and adjust audio levels.
Which Motorola radio models are compatible with the Motorola PMDN4102AR?
The Motorola PMDN4102AR is compatible with Motorola CP110, CP185, and EP350 portable two-way radios.
Are tools required to install the Motorola PMDN4102AR volume knob?
No tools are required. The Motorola PMDN4102AR features a push-on design that slides directly onto the radio potentiometer shaft.
Is this the channel selector knob or the volume knob?
The Motorola PMDN4102AR is the volume/power control knob. The matching channel selector knob is part number PMDN4103AR.
Is the Motorola PMDN4102AR a genuine Motorola OEM part?
Yes, the Motorola PMDN4102AR is an original equipment manufacturer replacement component manufactured directly by Motorola Solutions.
How do I remove a broken volume knob before installing the Motorola PMDN4102AR?
Firmly pull the damaged knob straight up off the metal shaft. Ensure any plastic fragments from the old knob are cleared before sliding on the new Motorola PMDN4102AR.
Warranty
1-year manufacturer's warranty.
