SI-TEX MDA-5H Hi-Power 5W SOTDMA Class B AIS Transceiver w/Built-In Antenna Splitter (w/o Wi-Fi)
Sharing an existing VHF antenna without signal loss, a SI-TEX MDA-5H SOTDMA transponder broadcasts 5W SOTDMA position reports via an internal 50-channel GPS, routing dual NMEA 0183 and NMEA 2000 telemetry at 0.88 lbs.
- 5W SOTDMA output extends transmission range
- Zero-loss splitter shares existing VHF antennas
- 50-channel internal GPS tracks satellite fixes
- Draws 3.0W max preserving boat batteries
$533.70
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Share a single VHF antenna while adding 5W Class B SOTDMA AIS with the SI-TEX MDA-5H Transceiver. Its built-in zero-loss antenna splitter, internal 50-channel GPS receiver, and wired NMEA connections make it suitable for boats that need higher-power AIS but prefer not to add Wi-Fi or Bluetooth equipment onboard. Need stronger AIS transmission without finding space for another antenna? The MDA-5H supports NMEA 2000, dual NMEA 0183 ports, and USB in a compact protected enclosure for below-deck installation.
Integration
The MDA-5H requires a compatible VHF voice radio, shared VHF antenna, valid MMSI/static vessel-data programming, and an MFD, chartplotter, radar display, or computer to show AIS data. It is not a VHF voice radio, radar, chartplotter, emergency beacon, or collision-avoidance guarantee.
The internal splitter can simplify the antenna arrangement, but the VHF antenna, radio, and AIS ports must be connected exactly according to manufacturer instructions. SOTDMA Class B offers higher AIS output than standard 2W CSTDMA Class B equipment, but reception and transmission remain dependent on antenna quality, VHF coverage, GNSS reception, and accurate vessel programming.
Before Ordering
Confirm Class B SOTDMA suitability, VHF radio and antenna compatibility, shared-antenna splitter requirements, MMSI registration, GNSS antenna needs, NMEA/USB interface requirements, 12V/24V power availability, and protected installation space before ordering.
Product Specifications
SI-TEX MDA-5H Hi-Power 5W SOTDMA Class B AIS Transceiver w/Built-In Antenna Splitter (w/o Wi-Fi)
| Brand | SI-TEX |
|---|---|
| Full Model SKU / Code | MDA-5H |
| Device Type | 5W SOTDMA High-Power Class B AIS Transceiver with Built-In Zero-Loss Antenna Splitter |
| Frequency Range | 156.025 MHz - 162.025 MHz (Marine VHF AIS Bands) |
| Channels | Dual-Channel AIS Transceiver + VHF Antenna Sharing |
| Output Power | 5 Watts SOTDMA |
| DSC (Digital Selective Calling) | Integrated Watch Receiver |
| GPS Receiver / GNSS | Internal 50-Channel GPS Receiver |
| NMEA Network Compatibility | NMEA 2000, Dual NMEA 0183 Ports, USB |
| Wireless Connectivity | None (Wired Configuration Only) |
| Display Type & Size | Status Indicator LEDs |
| Waterproof Rating | IPX2 (Protected Enclosure) |
| Operating Voltage Range | 12 / 24 V DC |
| Power Consumption | Max 3.0 W |
| Operating Temperature | -15°C to 55°C (5°F to 131°F) |
| Dimensions (L x W x H) | 140 x 100 x 42 mm (5.5 x 3.9 x 1.7 in) |
| Dry Weight | 0.4 kg (0.88 lbs) |
| Mounting Options | Bulkhead / Surface Mount |
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