TT31 Transponder
The Trig TT31 transponder offers unmatched installation ease and top-tier performance. Ideal for retrofitting the Bendix King legacy transponders, the TT31 "plug-and-play" design seamlessly fits into existing KT76A, KT76C, and KT78A trays. With support for Class 1 Mode S technology and 1090ES ADS-B Out capabilities, the TT31 meets the latest international standards. Compatible with popular GPS sources such as Garmin GNS, GTN navigators, and the Trig TN70, the TT31 transponder provides best-in-class installation flexibility.
The TT31 comes either as complete system, including tray, or standalone, without tray. Please ensure the right option is selected when ordering.
Key Features
- Plug-and-play Mode S retrofit for KT76A, KT76C, and KT78A
- Certified for IFR and VFR flight
- Low power consumption
- Traffic Information Service (TIS) capabilities
- Clear, backlit LED display
- No cavity tube – no warm-up time required
- Free FAA STC for ADS-B compliance in 650 aircraft types
- Compatible with various third-party avionics
- Built-in flight timer, stopwatch, and altitude alert
- Two-year worldwide warranty
Additional Features
The TT31 transponder is easy to operate, with a clear display and simple controls. It includes a flight timer, stopwatch, and altitude monitor for enhanced situational awareness. The TT31 also supports TIS traffic data from approach radars, displaying this information on various panel or portable displays. Regular software updates from Trig provide continued product improvements without costly hardware upgrades, ensuring the TT31 remains cutting-edge.
Mode S and ADS-B Capability
Designed to meet future airspace requirements, the TT31 transponder’s Mode S technology enables compliance with the U.S. 2020 ADS-B mandate. As the world’s first transponder certified to TSO-C166b, it sets a high standard for airspace compliance. ADS-B Out functionality allows the TT31 to support ADS-B In traffic reception, a necessity for U.S.-based operations according to FAA requirements.
Product Design
The TT31 operates efficiently, using only half the power of traditional transponders while transmitting at higher signal strength. This reduces waste heat and power load on the aircraft system, enhancing reliability. Designed for flexible installation, the TT31 supports both 14V and 28V systems without requiring dropper resistors. Additionally, it can interface with parallel and serial altitude encoders, providing a convenient altitude source for compatible GPS systems.
