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MD93 Series

Digital Clock / USB Charger

Accurate time-keeping is essential for any pilot and in-flight USB charging power is a necessity. The MD93 Series Digital Clock/USB Charger features intuitive operation with five modes: Local Time, UTC/Zulu Time, Flight Timer, Countdown Timer and Stopwatch. The Dual USB Charging Port charges any standard or high-power device with a USB interface. Available with 2.1 or 3.0 amps per port, the MD93 Series protects itself and the charging device from short circuit, power surges and over-current potential. View all USB Charging Ports Buy Now


  • Output Power: 2.1 amps or 3.0 amps per USB port
  • Input Voltage: 10 – 32 VDC
  • Output Voltage: 5 VDC ± 0.25 per USB port
  • Modes: Local Time, UTC/Zulu Time, Flight Timer, Countdown Timer and Stopwatch
  • Simultaneously charge smartphones, iPads, tablets and EFBs at full power
  • Six-digit, seven-segment LED clock
  • More than 10-year internal battery maintains time and flight timer memory when not powered by the aircraft
  • Compact 2-inch size fits standard panel cutout
  • Short circuit, power surge and over-current protection
  • Designed and built in Wichita, Kansas, USA
  • Two-year limited warranty
  • FAA TSO Certified


Model Number MD93 MD93H
Part Number 6420093-1 6420093-2
Input Voltage 10 – 32 VDC
Input Current 29 W max; 2.1 amps at 14 VDC
1.0 amps at 28 VDC
36 W max; 2.6 amps at 14 VDC
1.3 amps at 28 VDC
Output Voltage 5 VDC ± 0.25 per USB port
Output Current 2.1 amps per USB port 3.0 amps per USB port
Clock Accuracy ±0.5 seconds in 24 hours
Weight 0.3 lbs
Dimensions 2.39" W x 2.39" H x 1.15" D max
Temperature -40ºC to 70ºC (-40ºF to 158ºF)
Altitude 55,000 feet
Charging Port Type USB Standard-A
Mating Connector Kit MCI P/N 9018178
Mounting Rear-panel mounted, (4) #6 screws
Case Anodized aluminum black
Certification FAA TSO certified to C71
EASA ETSO certified to C71
RTCA DO-160G qualified


Product Flier

Product Brochure
General and Business Aviation

Installation Manual
IM 9018205

Technical Drawing
OL 6420093

Service Bulletins
SB MD93-01

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