190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page 2-17
2.2.1.2 Other LRU Power Requirements
Table 2-2 G3X LRU Power Requirements
LRU Supply Voltage Current Draw
GAD 27
14 Vdc 0.2 Amp (varies with connected devices)
28 Vdc Not supported, do not use in 28V installations
GAD 29
14 Vdc 0.2 Amp
28 Vdc 0.1 Amp
GDL 39/39R
14 Vdc 0.25 Amp
28 Vdc 0.125 Amp
GDL 51R
14 Vdc 0.16 Amp
28 Vdc 0.09 Amp
GDL 52R
14 Vdc 0.29 Amp
28 Vdc 0.15 Amp
GDU 37X**
14 Vdc 1.10 Amp
28 Vdc 0.540 Amp
GDU 45X**
14 Vdc 1.25 Amp
28 Vdc 0.7 Amp
GDU 46X**
14 Vdc 2.0 Amp
28 Vdc 1.0 Amp
GDU 470**
14 Vdc 1.25 Amp
28 Vdc 0.7 Amp
GEA 24
14 Vdc 0.43 Amp max (typical external sensor loading)
28 Vdc 0.21 Amp max (typical external sensor loading)
GHA 15
14 VDC 0.272 Amp typical, 0.350 Amps max
28 VDC 0.139 Amp typical, 0.175 Amps max
GI 260
14 Vdc 0.4 Amp
28 Vdc 0.2 Amp
GMC 305
14 Vdc 0.050 A (50 mA)
28 Vdc 0.028 A (28 mA)
GMC 307
14 Vdc 0.120 A (120 mA)
28 Vdc 0.067 A (67 mA)
*Garmin recommends using Mod 1 level GSU 73 in aircraft that use a +28 V supply voltage and intend to
monitor current on high voltage devices such as the aircraft alternator.
**The specified current draw is measured with the display backlight set to 100%
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