Motorola PMDN4101AR Channel Selector Knob for CP185 Radios

Channel Selector Knob OEM replacement channel selector knob for commercial portable radios. The Motorola PMDN4101AR (also designated as PMDN4101) is a genuine OEM replacement channel selector knob designed for Motorola commercial portable two-way radios. Engineered to fit onto the top rotary channel switch shaft, the Motorola PMDN4101AR restores firm, tactile channel switching and clear detent feedback when navigating talkgroups. Frequent channel changes, industrial wear, and accidental drops can strip or loosen control knobs over time. Replacing worn hardware with a genuine Motorola PMDN4101AR channel knob ensures positive engagement at each channel position, preventing accidental frequency drift during critical field operations. Key Features & Benefits Direct OEM Factory Replacement: Exact fitment and color match for original Motorola radio housing specifications. Motorola PMDN4101AR Tactile Grip: Textured ridged exterior provides secure rotational grip in wet or gloved conditions. Positive Detent Alignment: Precision internal socket engages firmly with the channel shaft to deliver crisp tactile clicks. High-Impact Polymer Construction: Built from durable industrial-grade plastic to withstand daily torque and UV exposure. White Position Indicator: Molded white line mark allows fast visual confirmation of the active channel selection. Specifications Attribute Details Brand Motorola Solutions Model/SKU PMDN4101AR (PMDN4101) Product Type Channel Selector Knob Material High-Impact Molded Polymer Color Black with White Indicator Mark Mount Type Push-On Rotary Switch Shaft Compatibility CP110 CP185 EP350 Recommended Accessories Matching Control Knobs Motorola PMDN4102AR Volume Knob – Companion volume and power control knob for CP185 and CP110 series radios. Active Portable Radios Motorola CP200d DMR Two-Way Radio – Commercial digital portable radio for enterprise communication fleets. Motorola MOTOTRBO R2 Portable Two-Way Radio – High-durability digital portable radio built for demanding environments. Batteries & Audio Accessories Motorola NNTN4497DR Li-Ion Battery – Genuine high-capacity replacement battery pack for commercial series radios. Motorola PMMN4013A Remote Speaker Microphone – Heavy-duty Windporting remote speaker mic with audio jack. More Resources 15 Myth-Busting Facts About Two-Way Radio Range – Clear analysis dispelling common misconceptions regarding radio output power and coverage. Frequently Asked Questions What is the primary function of the Motorola PMDN4101AR knob? The Motorola PMDN4101AR is a replacement knob that attaches to the top channel switch shaft to allow users to switch operating frequencies and talkgroups. Which Motorola radio models are compatible with the Motorola PMDN4101AR? The Motorola PMDN4101AR is compatible with Motorola CP110, CP185, and EP350 portable two-way radios. Are tools required to install the Motorola PMDN4101AR channel knob? No tools are required. The Motorola PMDN4101AR features a push-on design that slides directly onto the radio channel switch shaft. Is this the volume knob or the channel knob? The Motorola PMDN4101AR is the channel selector knob. The companion volume/power control knob is part number PMDN4102AR. Is the Motorola PMDN4101AR a genuine Motorola OEM part? Yes, the Motorola PMDN4101AR is an original equipment manufacturer replacement component manufactured directly by Motorola Solutions. How do I remove a damaged channel knob before installing the Motorola PMDN4101AR? Firmly pull the old knob straight up off the metal shaft. Clear any debris from the shaft before pressing the new Motorola PMDN4101AR into place.   Warranty 1-year manufacturer's warranty.