GTX 345 Mode S ADS-B surveillance transponder

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GTX 345 is an aircraft Mode S transponder with ADS-B transmission and reception. Its panel-mounted controls and traffic interfaces support avionics integration, while internal GNSS and altitude-encoder options depend on the selected unit configuration.

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Specifications

Specifications · GTX 345 Mode S ADS-B surveillance transponder
General
Grade	Aerospace-grade
Market	Civil
Platform class	Large UAS (25–150 kg), Heavy UAS (>150 kg), eVTOL, Manned aircraft
Airframe	Any
Availability	In production
Key specifications
Function	Transponder^[1]
Datalink	1090ES^[1]
Transponder modes	Mode S with 1090 MHz Extended Squitter ADS-B Out; built-in 1090 MHz and UAT receivers for ADS-B In.^[1]
Additional specifications
ADS-B In	Yes^[1]
Antenna	Bottom-mounted external transponder antenna for standard GTX 345.^[1]
Antenna diversity	No^[1]
Physical interfaces	ARINC 429, RS-232, RS-422, Discrete I/O^[1]

Sources

static.garmin.com/pumac/190-00734-11_08.pdf · checked October 19, 2026

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About the company

Garmin

United States

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This product listing is maintained by our editorial team and may contain errors. Last updated November 2026.

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