Micro Air T2000 Transponder

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Part# 11-00990
MFR Model# 827TRD1006-08


The Microair Avionics T2000SFL Transponder is a mode 3A/C aircraft transponder designed to operate in an ATCRBS environment.

The T2000SFL has been designed to meet RTCA/DO-144 requirements, and has been tested to DO-160D for environmental and EMC requirements.

The T2000SFL software has been developed and approved under RTCA/DO 178B requirements.

The T2000SFL is a small lightweight transponder with low power requirements. The T2000SFL is compatible with any C88a compliant altitude encoder, and offers the following features:

  • Mode 3 A response (4096 codes)
  • Mode C altitude response
  • SPI indent response
  • Encoder Altitude displayed
  • Altitude Alert (HI / LO)
  • Voltage alter (OV / UV)
  • Security coding of serial number
  • Option to power encoder only in mode C operation.

Download Installation Manual Here:
T2000 Installation Manual

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WARNING: Cancer and Reproductive Harm -


I just bought my plane and brought it home from Dallas last week. It has a T2000 SFL. I flew through the DFW Bravo then had flight following for the next two hours. About 45 minutes into the flight, ATC asked me why I was transmitting 1200. I thought I must have bumped the toggle so I switched back to assigned squawk code. Several minutes later it had switched back to 1200 on its own. Then I could see it rapidly fluttering between the two codes until it stuck on 1200 and I could not toggle back to 7404. ATC asked me to IDENT and that would not work, either. Later, on its own, it switched back to 7404. When I terminated radar services I could not toggle it back to 1200. Once on the ground, I recycled the T2000SFL to no avail. No functions would work. The V button, the Mode button, nor the toggle would work. I could change the standby code but could not change it to active. Very frustrating. I wrote in to Micro Air support immediately but am still waiting on a reply from a Tech. So far, Im not impressed. But Im willing to work with Tech Suoport if they will take the time to help me with this.

Ken T
June 26, 2017


Please note, Aircraft Spruce'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. Aircraft Spruce 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: What are the dimensions, weight and power input for the Microair T2000 transponder?

This is a 2.25 inch radio, the length is 169mm (6.65) x width 61mm (2.40) x height 61mm (2.40). Weight is 600g (21 oz) and recommends a circuit breaker with a maximum 5 amp rating (3 amp minimum). Power input is 10-33VDC.

Q: Does the Micro transponder come with a built in Encoder??

The Encoder is not built into the Micro Air T2000.

Q: Is the Microair T2000 transponder self contained?

Yes, as a transponder. However, it still requires a blind altitude encoder connected to it.

Q: Does the Micro Air T2000 unit come with complete installation kit and antenna?

No antenna comes with the unit. The install item that comes with the transponder is a solder type d-sub connector.

Q: What encoder would I need with this Microair T2000 transponder unit?

We would recommend the ACK A30.5 - part number 11-01561 - for use with the Microair transponder.

Q: Does the connector on the back of the unit use pins or sockets?

The D Sub on the back of the connector uses pins.

Q: Which antenna does it require or is most suitable.?

The T2000SFL requires an antenna tuned to 1090MHz. Microair recommends the use of a TSOd antenna for transponder purpose.

Q: Is this Micro Air T2000 Transponder TSOd?

Yes, this is TSO approved.

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