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Part# 11-14466
MFR Model# ASA-00230-SU


Note: Unit can only be sold for experimental aircraft.

The Stratus ESG was designed as a simplified all-in-one box solution for 2020 compliance, with non-glass panel aircraft in mind.
  • ADS-B Out Transponder
  • Built-in WAAS GPS
  • GPS antenna included
Stratus ESG is a 1090 MHz extended squitter (ES) transponder with built-in WAAS GPS. Designed with the common 1.65 tall form factor, it's an easy replacement for your existing transponder. Stratus ESG is a solid state transmitter that provides 310 watts nominal power output. Its modern keypad makes entering a squawk code easy. The convenient VFR button minimizes pilot keystrokes.
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -


  • 1090ES (Mode S extended squitter)
  • Built-in WAAS GPS
  • Meets global mandates for ADS-B Out
  • Push-button operation
  • Easy-to-use interface
  • Pressure altitude monitor


  • Bezel Height: 1.69 in. (43 mm)
  • Bezel Width: 6.38 in. (162 mm)
  • Depth: 10.75 in. (273 mm) front of panel to connector backshell
  • Weight: 3.29 lbs. (1.49 kg) including rack and connectors
  • Operating Temperature: -20C to 55C
  • Storage Temperature: -55C to 85C
  • Power Input: 9.0 to 36.0 VDC, 15 W typical
  • Cooling Input: No fan required
  • Environmental Compliance: DO-160G
  • Software Compliance: DO-178B Level C
  • Hardware Compliance: DO-254 Level C
  • Display: OLED
  • Transmitter Power: 310 W



Please note,'s personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Is this Appareo Stratus ESG transponder a slide-in replacement for the analog Garmin GTX 327?

There is no direct ADS-B slide-in replacement for the Garmin GTX 327.

Q: Will this transponder fit in the mounting rack of a King KT-76A transponder?

No. This unit will not fit into the mounting rack of any other avionics unit.

Q: Does the Appareo Stratus ESG transponder meet all the TSO requirements for ADS-B out?

Yes. This transponder meets the TSO requirements for ADS-B out, however, the version listed on this page is intended for use in experimental aircraft only and cannot be sold for certified installations.

Q: If I buy an ESG 1090 now for my RV, to take advantage of the FAA rebate, can I have it moved next year to a certified plane Im considering for restoration? (If I keep the RV it will get a new glass panel and the Stratus will become surplus.)

Based on the part number of the experimental version we sell, it cannot be later installed in a certified aircraft as there will be no paperwork for the sign off.

Q: Is there a version of this Appareo Stratus ESG 1090 ES transponder that is able to be sold for certified installations?

Yes, but you must purchase the certified version from the avionics install shop performing the install.

Q: My plane currently has no transponder. What else do I need to complete install that the Stratus ESG kit doesn't provide? Do I need transponder antenna and an altitude encoder?

New installations will require: Encoder, transponder antenna, circuit breaker and coax cable.

Q: Does this unit have ADS-B in as well than can be displayed on an iPad?

This unit is only equipped with ADS-B out. For ADS-b in to the iPad you will need the Stratus 2S.

Q: Does the Appareo Stratus ESG transponder come with a mounting rack?

Yes, the rack, backplate and connector kit are included.

Q: Will the Appareo Stratus ESG transponder qualify for the FAA rebate if installed in my experimental/homebuilt by me? I am the builder and have the repairmans certificate.

Yes, this unit qualifies for the FAA rebate program. Please see the FAA rebate website for more information on the program and qualifying aircraft.

Q: Does this Appareo Stratus ESG 1090 es digital transponder include a transponder antenna and GPS antenna for the internal WAAS GPS with the install kit? What does the stock 4 ft wiring harness consist of?

The unit does not come with a transponder antenna, but does come come with the gps antenna. The wiring harness is the power, ground, and altitude encoder wires.