TT31 Mode S Transponder

TT31-Mode S and 1090ES ADS-B Out Transponder (2020 Mandate Ready)

Part No:

Manufacturer: TRIG

• Retrofit – ‘plug and play’ installation for KT6A and KT78A transponders

Certified Mode S and 1090ES ADS-B Out capable

Lowest power consumption in class

240 watts nominal output

Great functionality and performance

TIS traffic capabilities

Backlit LCD display

No cavity tube – no warm up time required

No need for dropper resistors

Certified to FAA TSO C166b as a 2020 ‘mandate ready’ solution (Trig tray required)

Two year worldwide warranty

Now STC'd for interface with Garmin GNS400W/500W series navigators for full ADS-B compliance. Please see STC AML for aircraft and equipment applicability.

Trig’s TT31 transponder is the perfect retro-fit for the popular Bendix King KT76A and KT78A transponders. The TT31 is a certified Class 1 Mode S transponder which will ‘plug and play’ straight into the existing Bendix King tray.

The TT31 is the most power efficient transponder available today; it’s easy to use and operate, with a clear bright display and simple user interface. Features include a flight timer, stop watch and altitude monitor that can alert you of a deviation from your selected altitude. In the U.S. the TT31 includes datalink support for TIS traffic uplinked from approach radars. TIS traffic can be displayed on a variety of cockpit displays, and coverage includes most US terminal areas.

Mode A and C transponders are now being replaced by Mode S. This technology is more advanced and also optimised for tomorrow’s airspace requirements.  The advent of ADS-B technology now means the modern transponder has become the heart of future airspace compliance requirements. Here the TT31 remains the transponder of choice. It is the world’s first Mode S and 1090ES ADS-B Out capable transponder certified to TSO C166b. This is latest FAA standard for the 2020 ADS-B mandate and demonstrates Trig’s advanced levels of compliance.

Not only is the TT-31 the easiest upgrade path for their old KT-76A/78A transponder, with a Trig TT31 tray installed the same transponder is mandate ready. With a certified WAAS GPS and a ground air determination device the TT31 forms the ideal hub of your future 2020 ADS-B solution today. In fact it’s worth remembering that to receive all ADS-B In transmissions the FAA requires a functioning certified ADS-B Out device, so don’t miss out on airspace information by not fitting a Trig unit. 

The TT31 uses half the electrical power of the leading competitor transponder, whilst still transmitting at a higher signal power, its efficient design reduces waste heat in the avionics stack and reduces the load on the aircraft electrical system improving overall reliability. The flexible power input means that both 14 and 28 volt systems can be used without special configuration or dropper resistors . The TT31 is compatible with both parallel and serial altitude encoders; it can even act as a serial altitude repeater to provide a convenient altitude source for your GPS. All Trig products come with a two year warranty.

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