Description
Motorola BDN6783B Audio Accessory Adapter for APX Portables
3.5mm threaded audio jack adapter with integrated PTT and tethered dust cover for Motorola APX and SRX portable radios.
The Motorola BDN6783B is a genuine OEM audio accessory adapter that mounts to the universal side connector of Motorola APX and SRX portable radios, converting it to a 3.5mm threaded audio jack. The threaded interface locks surveillance earpieces and headset accessories securely in place, preventing accidental disconnection during active operations. An integrated side PTT button provides a secondary transmit option, and a tethered rubber dust cover protects the jack when no accessory is connected. The BDN6783B is the updated version of the BDN6783A and BDN6783.
Key Features & Benefits
3.5mm Threaded Audio Jack: Locks surveillance earpieces and headset accessories securely via an internal threaded interface, preventing accidental pull-out during physical activity.
Integrated PTT Button: Side-mounted push-to-talk button allows transmission without reaching for the radio body — ideal for gloved-hand or covert operations.
Tethered Rubber Dust Cover: Protects the 3.5mm jack from moisture, dust, and debris when no accessory is plugged in.
Thumbscrew Locking Mount: Secures flush against the radio’s universal side connector port, maintaining the radio’s environmental seal and preventing vibration-induced loosening.
CSA Intrinsic Safety Rated: Certified for use in hazardous environments.
Genuine OEM Part: Factory-authorized Motorola component ensuring correct fit and full compatibility with APX and SRX radio platforms.
Specifications
| Attribute |
Details |
| Brand |
Motorola Solutions |
| Model / SKU |
BDN6783B (replaces BDN6783A, BDN6783) |
| Product Type |
Audio Accessory Adapter |
| Radio Connector |
Motorola Universal Side Connector |
| Audio Interface |
3.5mm Threaded Jack |
| Controls |
Integrated Side PTT Button |
| Dust Protection |
Tethered Rubber Port Cover |
| Intrinsic Safety |
CSA Rated |
| Housing Material |
High-Impact Polycarbonate |
| Color |
Black |
Model Variations
| Model |
Key Difference |
| BDN6783B |
3.5mm threaded audio jack with integrated PTT and tethered port cover |
| PMLN5632A |
Molex accessory port adapter for specialized fast-connect public safety headsets |
Compatibility
| Model |
Series |
| APX1000, APX2000, APX3000, APX4000 |
Motorola APX Series |
| APX5000, APX6000, APX6000XE, APX7000, APX7000XE |
Motorola APX Series |
| APX8000, APX8000XE, APX900 |
Motorola APX Series |
| APX Next, APX Next XE, APX Next Multi-Band |
Motorola APX Next Series |
| SRX2200 |
Motorola SRX Series |
What's Included
| Description |
SKU/Model |
Status |
| APX Universal Side Adapter Module |
BDN6783B |
Included |
| Tethered Rubber Port Cover |
Integrated |
Included |
| Threaded 3.5mm Surveillance Earpiece |
— |
Sold Separately |
| Compatible APX/SRX Radio |
— |
Sold Separately |
More Resources
Frequently Asked Questions
Can I use a standard unthreaded 3.5mm earpiece with this adapter?
Yes. The 3.5mm jack accepts standard unthreaded plugs. However, using an unthreaded plug removes the mechanical locking advantage, meaning the cable can still be accidentally pulled free during active use. Threaded earpieces are recommended for secure retention.
Do I need to change any radio settings when installing this adapter?
The radio automatically detects when an audio accessory is connected to the side port. If using high-sensitivity covert earpieces, you may want to review audio volume settings in the radio’s Customer Programming Software (CPS) to ensure safe acoustic levels.
Does the adapter maintain the radio’s environmental seal?
Yes. When the thumbscrew is fully tightened, the adapter seats flush against the radio’s side connector port, preserving the environmental seal. When no earpiece is connected, the tethered rubber dust cover must be firmly seated in the 3.5mm jack to maintain moisture protection.
Warranty
1-year manufacturer’s warranty.
