NXT-600™ for Business Jets

L3Harris’ NXT-600™ Mode S Transponders is ready to provide corporate and legacy business jet manufacturers and owners with all the capabilities they need to operate safely and efficiently in NextGen Automatic Dependent Surveillance – Broadcast (ADS-B) airspace. Optimized for NextGen operations, the NXT-600™ enables pilots to take advantage of more efficient routing, while increasing airspace capacity, situational awareness and overall operational safety.

The adaptor tray also enables quick and easily replacement of the Rockwell Collins TDR-94 and TDR-94D systems.

NXT-700™ (BK MST 70B) for Business Jet and Military Aircraft

ACSS’ exclusive distributor of the NXT-700 (MST 70B) transponder for business jet and military aircraft is BendixKing. For information on purchasing product from BendixKing please use the button below.

Bendixking website
Bendixking website
NXT-800™ for Regional Aircraft

Mode S Transponder designed to maximize space and provide pilot efficiency and situational awareness.

Bendixking website
Bendixking website

Highly accurate position reporting

High-level of ADS-B Out (DO-260B) reporting requires the transmission of precise, real-time flight data information, including current aircraft position, speed and intent. The NXT-600 automatically transmits all position data via ADS-B Out to other nearby aircraft (equipped) and Air Traffic Control (ATC).
NextGen ADS-B compliant around the world

L3Harris NXT transponders are DO-260B-compliant to meet NextGen & Standardized European Rules of the Air (SESAR) mandates requiring transmission of more precise position, speed and intent data. They also meet ICAO Level III standards for the latest functionality for the ICAO Airborne Collision Avoidance System (ACAS) II mandate and are also compliant with European Elementary and Enhanced Mode S Surveillance Downlink of Aircraft Parameters (DAPs) and ADS-B 1090ES extended squitter.

Software upgradability yields reduced maintenance costs

The capability to perform timely onboard software loads provides operators with simplified upgrades, increased aircraft utilization and lower maintenance costs. In addition, the high reliability of the NXT-series greatly enhances the overall validity of the TCAS system reducing Mode S transponder-induced No-Fault-Found (NFF) TCAS failures.


NXT-600: 9006000-55000 (DC)
NXT-700: 9007000-55001 (DC)
NXT-800: 900800-55000 (DC) / 9008000-10000 (AC)


Size (inches):

NXT-600: 3.4" (H) x 4.15" (W) x 14.01" (L) length includes handle
NXT-700: 7.62" (H) x 2.35" (W) x 12.74" (L) length does not include handle, front tie down, or front door knob
NXT-800: 4 MCU


NXT-600: 5.1 lb.
NXT-700: 5.5 lb.
NXT-800: 8.3 lb. (AC), 7.3 lb. (DC)


NXT-600: ARINC 404 MT-600 Mount
NXT-700: 1/4 ATR Short
NXT-800: ARINC 600 4 MCU Mount / MT-600 Mount


NXT-600: Internal
NXT-700: Internal
NXT-800: External


Environmental: DO-160G
TSO/JTSO: C112d, C166b/C112d
Software: DO-178B Level B
Transponder Data Link Capability: ICAO Level 3 (COMM-A/B/C)
ADS-B Capability: 1090ES Extended Squitter per RTCA DO-260B MOPS for 1090 ADS-B Equipment
Operating Altitude: Sea level to 55,000 feet
Operating Temperature: -55 to +70 degrees C
Storage Temperature: -55 to +85 degrees C
Power: NXT-600 (28VDC), NXT-700 (28VDC), NXT-800 (115VAC, 400Hz or 28VDC)
Power Consumption: 28 Watts (standby), 55 Watts (maximum)
No. of Antenna Ports: 2 (diversity)


Controller: Low speed ARINC 429
TCAS II: High speed ARINC 429
GPS: High or low speed ARINC 429
Altimeter: ARINC 429/575 (digital air data)
Flight Identifier: Various
Maintenance Computer: Low speed ARINC 429
WebEDDIT: RS-232

About ACSS

ACSS, an L3Harris Technologies and Thales Avionics joint venture, designs, manufacturers and provides support for surveillance and communication products used in aircraft, helicopters and UAVs. Thales Avionics is the exclusive sales and support agent for ACSS products used by customers operating Airbus and Boeing aircraft. For more information on Thales Avionics, please visit www.thalesgroup.com. For other platforms, contact us directly.

Product support

Repair and Overhaul Administration:
Email: ACSS.phxrepair@L3Harris.com
Phone: +1 (623) 445-7030
Fax: +1 (623) 445-7002

Product Support/Customer Service:
Email: crc.acss@L3Harris.com
Phone: +1 (623) 445-7070
Fax: +1 (623) 445-7001

AOG Services:
Regional, Business Jet & Military
Administered by logistics partner AVGroup
Provides exchange and rental services of ACSS LRUs to existing ACSS customers.
Email: salesatl@avgroup.net
Phone: +1 (866) AOG-TCAS or (866) 264 8227 US callers
Phone: +1 (678) 597-2792 International callers
Fax: +1 (770) 457-8563


For commercial air transport customers flying Boeing and Airbus platforms, please contact Thales Avionics at www.thalesgroup.com.

For business aviation customers, please locate a dealer here

For other inquiries, please contact our corporate offices at 623-445-7070

Technical publications

Current L3Harris product owners and L3Harris Authorized Repair Facilities needing to access the latest versions of our Technical Publications and Service Bulletins can register by clicking the tab below and completing the information requested.
Once you are registered you will be able to search our Technical Publications and Service Bulletin library.

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