Description
Product Overview
The SJ-TC403 is a complete drone imaging and data link kit built around a 2.7-7GHz COFDM air unit, a ground receiving box, dual-band antennas and a pair of camera modules. The package ships with a 4MP visible-light night-vision camera and a 720×576 thermal imager, so one link carries both HD daylight video and thermal imagery to the ground. Its air unit weighs only 22.41g in a 34x34x18mm CNC housing with an active micro turbo fan, making it suitable for small and medium multirotors. Because the system transmits video and telemetry over the same channel, it is widely used for power line patrol, search and rescue, and FPV aerial photography.
Key Features
- Full kit: VTX air unit, RBox ground station, VIS camera, IR thermal camera and both antenna sets
- 2.7-7GHz dual-band COFDM link with 36 switchable channels and 5MHz channel bandwidth
- Up to 25km line-of-sight transmission with simultaneous video and data downlink
- 1080p60 visible-light imaging plus 720×576 thermal imaging on a single link
- Lightweight air unit: 22.41g, 34x34x18mm, 8-40V input, 15W max power
- Betaflight, INAV and ArduPilot MSP OSD support with 3 OSD refreshes per second
Technical Specifications
| Air Unit (VTX) | |
|---|---|
| Model | SJ-TC403 |
| Frequency band | 2.7 ~ 7GHz |
| Channel bandwidth | 5MHz |
| Transmit power (EIRP) | FCC <30dBm; CE <14dBm; SRRC <20dBm; MIC <25dBm |
| Interface | JST1.0*4 (power) + TF card slot |
| Mounting holes | 25.5mm x 25.5mm |
| Dimensions | 34mm x 34mm x 18mm |
| SD card slot | Up to 1TB |
| Video resolution | 1080p60fps / 720p60fps |
| Weight | 22.41g |
| Operating temperature | -20 ~ 60℃ |
| Number of channels | 36 |
| Power input | 8 ~ 40V |
| Max power consumption | 15W |
| Flight controller support | Betaflight, INAV, ArduPilot |
| OSD | Canvas mode |
| Ground Station (RBox) | |
| Model | SJ-TC403 |
| Frequency band | 2.7 ~ 7GHz |
| SD card slot | Up to 1TB |
| Video outputs | HDMI, USB 3.2 Type-C DP display, USB 2.0 Type-C debug |
| Serial port | UART expansion, TTL 3.3V |
| Power input | 9 ~ 30V, 2A |
| Max power consumption | 11W (with fan) |
| Fan output | 5V, 200mA |
| Keypad interface | Proprietary keypad board (custom keypads supported) |
| Visible Light Camera (VIS) | |
| Sensor | 1/1.88 inch, 4MP |
| Resolution | 1080p@60fps |
| Aspect ratio | 16:9 / 4:3 |
| FOV | 149° |
| Aperture | F1.8 |
| Shutter | Rolling shutter |
| Min. illumination | 0.0001Lux |
| Weight | 11g |
| Dimensions | 19mm x 19mm x 30mm |
| Coaxial cable | 160mm / 350mm |
| Thermal Camera (IR) | |
| Resolution | 720 x 576 |
| FOV | 62.4° |
| Aperture | F1.0 |
| Weight | 23g |
| Dimensions | 22mm x 22mm x 38mm |
| Coaxial cable | 160mm / 350mm |
| Antennas | |
| Polarization | LHCP |
| Bandwidth | 2.7 ~ 5GHz and 5 ~ 7GHz |
| Air-side gain | 2dBi, IPEX-1, 9.78g / 10.08g |
| Ground-side gain | 10dBi, SMA-J, 165g / 95g |
| Impedance | 50Ω |
| VSWR | <1.5 (air) / ≤2.5 (ground) |
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