Description
Motorola S5415C Cell Phone Booster 3W EE3 SLN3482B SLN3506A Car Cradle RF Amp
The Motorola S5415C is a 3-watt vehicle-mounted cell phone signal booster designed specifically for use with Motorola EE3 logo personal phones in car cradle installations. It amplifies the phone's RF transmit power to improve signal strength and call quality in areas with weak cellular coverage, operating from a 12VDC negative ground vehicle power supply. The unit interfaces directly with compatible Motorola car cradles via its 25-pin connector and routes the amplified signal through an external antenna via the SMA RF port.
Specifications & What's Included
- Manufacturer: Motorola
- Model: S5415C
- FCC ID: IHDT5VF1
- Output Power: 3 Watts
- Power Requirements: 12VDC, Negative Ground
- Cradle Interface Connector: 25-Pin D-Sub (DB25)
- RF Antenna Connector: SMA (female)
- Auxiliary Port: RJ-11 / RJ-12 modular jack
- Form Factor: Compact finned aluminum module, vehicle/fleet mount
- Compatible Car Cradles: SLN3482B, SLN3506A, SLN3500B, SLN3501B or later version
- Compatible Phones: EE3 Logo Motorola Personal Phones
- What's Included: Booster unit only — no cradle, antenna, or phone included
Applications
The S5415C was designed for fleet and commercial vehicle applications where reliable cellular coverage is critical — public safety, transportation, field service, and utility vehicles being typical deployments. By boosting the handset's transmit power through an externally mounted vehicle antenna, the system extends usable range and reduces dropped calls in fringe coverage areas. This booster is specific to Motorola's EE3 cradle ecosystem, a proprietary vehicle integration platform Motorola produced in the 1990s and early 2000s for its brick and flip-phone era handsets. Compatible cradles (SLN3482B, SLN3506A, SLN3500B, SLN3501B) hold the phone and route audio, power, and RF through the booster simultaneously. While the specific EE3 phones this unit was paired with are long discontinued, the S5415C remains sought after by collectors of vintage Motorola vehicle equipment and by operators maintaining legacy fleet communication setups that still use the original cradle infrastructure.
This Motorola S5415C Cell Phone Booster has been inspected and is in good used condition. It was pulled from a working environment where it was previously in use. The black aluminum enclosure shows light surface wear consistent with vehicle/fleet use. The DB25 cradle connector pins appear clean and intact, and both the SMA RF port and RJ-11 jack look undamaged. Please view our photo set and contact us if you have any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function.
Warranty Information
Additional Information
Brand: |
Motorola |
Model: |
S5415C |
MPN: |
S5415C |
FCC ID: |
IHDT5VF1 |
Type: |
Cell Phone Signal Booster / RF Amplifier |
Output Power: |
3 Watts |
Power Requirements: |
12VDC Negative Ground |
Compatible With 1: |
EE3 Logo Motorola Personal Phones |
Compatible With 2: |
SLN3482B Car Cradle |
Compatible With 3: |
SLN3506A Car Cradle |
Compatible With 4: |
SLN3500B Car Cradle |
Compatible With 5: |
SLN3501B or Later Version Car Cradles |
Connector Type 1: |
SMA RF Antenna Connector |
Connector Type 2: |
25-Pin D-Sub (DB25) Cradle Interface |
Connector Type 3: |
RJ-11 / RJ-12 Modular Jack |
Form Factor: |
Compact Module / Vehicle Mount |
SKU: |
26981 |
Condition: |
Used – Pulled from Working Environment |
Seller Notes: |
Unit only; no cradle or phone included. Pulled from working environment. |
Country/Region of Manufacture: |
United States |
Condition Notes: |
Motorola S5415C Cell Phone Booster in good used condition. Pulled from a working environment. Inspected — enclosure shows light wear; DB25, SMA, and RJ-11 connectors appear intact. No cradle or phone included. |
