Tronair 112820CT3 / 112820C1T3 28.5 VDC Cummins Diesel GPU

Tronair 112820CT3
Manufacturer: Tronair
Part Number: 112820CT3
Condition: New
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✓ Operating manuals available online for purchased equipment
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The Tronair 112820CT3, 112820C1T3, 112820CS1T3, and 112820CST3 are 28.5 VDC diesel aircraft ground power units with a Cummins Tier 3 diesel engine.

Standard Features

  • Cable head sensing output voltage drop compensation ensures full power is provided to aircraft
  • Automatic engine speed control ensures no droop of engine speed
  • Cable head sensing interlock circuit
  • Tier 3 Engine - Cummins Tier 3 QSB electronic engine with full-authority electronic controls over the performance of the engine
  • Tier 3 Engine - 120vac plug-in coolant heater and automatic intake air grid heater for cold starts
  • Tier 3 Engine - 110 HP A 1800 rpm for low fuel consumption
  • Large engine digital display and diagnostics module
  • Reduced noise levels via 2” sound insulating foam
  • Six phase alternator and rectifier for ultra low DC output ripple
  • Alternator excitation test switch for easy troubleshooting
  • High efficiency single bearing alternator
  • Adjustable peak output current limiting control
  • Low coolant shut down system
  • Durable, compact, maneuverable, trailer mounted unit
  • Low fuel warning lamp
  • Large 35 gallon fuel tank for 12+ hours of use
  • Large cable trays for easy cable stowage
  • 30 ft (9.1 m) DC output cable
  • Hand actuated rear drum brakes
  • Fifth wheel steering
  • Large access doors
  • Fire Extinguisher
  • Galvanized sheet metal to prevent corrosion
  • Weather resistant steel canopy
  • CE marked
  • Finish: Durable Powder Coat Tronair Blue

Additional Features

  • 112820C1T3 - Running Lights, No fuel shut-off
  • 112820CST3 - Skid mounted with fuel tank, suitable for fixed or truck mounted applications
  • 112820CS1T3 - Running Lights, No fuel shut-off, Skid mounted with fuel tank, suitable for fixed or truck mounted applications

Continuous800 Amps
EngineCummins Tier 3 QSB
Height61 (155) in (cm)
Length96.5 (25.5) in (cm)
Peak2000 Amps
Weight2900 (1315) lb (gk)
Width66.25 (168) in (cm)

You Ask. We Help. Your FAQs for the Tronair 28V Diesel GPU.

MIL-PRF-704 (Mil Specs) - Does it meet this?
Yes, the unit was designed using this standard

Do they have a specific standard or meet any other specs?
CE compliant

Voltage Regulation - +/- - What is the specs for this?
Voltage regulation +/-1% in steady state normal operation, MIL-STD-704

Alternator - Overload Setting - What is the overload parameters?
Current overload >2100 amps - main contactor drops out

1800 RPM for low fuel consumption...does have it low/high RPM operating parameter...or does it always run at 1800 RPM
Running mode is 1800 rpm

What is RPM running idle with nothing connected and what is the RPM while under load?
Idle speed is 850 rpm (112820CT3), 1800 rpm running

Alternate Models
112820CPrevious Part Number
282000CPrevious Part Number
Shipping Information
Pkg. 1 Weight3860 lbs.
Pkg. 1 Dimensions116 in. x 76 in. x 83 in.
Pkg. 1 TypeCrate
Freight Class92.5
Freight NMFC133300
Schedule B9032810080
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Compatible Aircraft*
ATR42, 72
AdamA500, A700
AgustaA109A, A109C, A109E, AW139 (AB139), Mark II
Airbus Military (CASA)212-100, 212-200, C-295, CN-235/HC-144A
BAeJetstream 31, Jetstream 41
Bell204, 205, 206B3, 206L4, 206LT, 212, 214, 214ST, 222, 230, 407, 407GX, 412, 427, 429, 430, 525, CH-139, OH-58, TH-67, UH-1, UH-1H
Bombardier (Business)C-21, Challenger 300, Challenger 350, CL-215, CL-215T, CL-415, Learjet 23, Learjet 24, Learjet 25, Learjet 31, Learjet 31A, Learjet 35, Learjet 45, Learjet 55, Learjet 60, Learjet 70, Learjet 75
Bombardier (Regional)CRJ705, Dash 6 (Twin Otter UV-18A), Dash 7, Dash 8-100, Dash 8-200, Dash 8-300, Dash 8-400
Britten NormanIslander/Trislander
Cessna150, 152, 172, 177, 180, 182, 185, 206, 207, 210, 310, 320, 337 Skymaster, 340, 401, 402, 404, 411, 414, 414A, 421, 421C, Bravo, Caravan 208, Caravan 208B, Caravan 406, Citation 560 XL, Citation 560 XLS, Citation 650, Citation CJ1, Citation CJ2, Citation CJ3, Citation Encore 560, Citation I 500, Citation I/SP 501, Citation II 550, Citation III, Citation IV, Citation M2, Citation SII, Citation Sovereign 680, Citation Ultra 560, Citation V, Citation VI, Citation VII, Citation X 750, Latitude 680A, Mustang 510
DassaultFalcon 10-100, Falcon 20-200, Falcon 2000, Falcon 2000EX, Falcon 50, Falcon 50EX, Falcon 7X, Falcon 8X, Falcon 900, Falcon 900EX
Diamond AircraftDA40 Diamond Star
EmbraerEMB-110, EMB-120, ERJ-135, ERJ-140, ERJ-145, Legacy 450, Legacy 500, Legacy 600, Legacy 650, Phenom 100, Phenom 300
EurocopterAS330 Puma, AS332 Super Puma, AS350 A-Star (High Skid Gear), AS350 A-Star (Low Skid Gear), AS355 Twin Star, AS365N Dauphin, AS532 Cougar, BK-117, BO-105, H135 (EC135), H145 (EC145), H175 (EC175), H225M (EC725 Super Cougar), HH-65A Dolphin, UH-72A Lakota
Fairchild/DornierDornier 228-100/200, Dornier DO328, Dornier DO328 Jet, Envoy 3, Merlin II, Metro Merlin III, Metro Merlin IV
Fokker27, 28, 50, 70
General DynamicsConvair 580, Convair 600, Convair 640
GulfstreamAero Commander, G100 (Astra SPX), G150, G200 (Galaxy), G350, G450, G500, G550, G650, I, II, III, IV, IVSP, Turbo Commander, V, VSP
Hawker BeechcraftBeech 1900, Beech 99, Beech Baron, Beech Bonanza, Beechjet 400A, C-12, Diamond, Duke 60, Hawker 1000, HS-125 400 Series, HS-125 800 / 850 / 900 Series, King Air, Premier, Queen Air, T-1 Jayhawk, T-400, T-6A Texan II, U-21 A/G
HondaJetHA-420 HondaJet
IAIAstra, Westwind 1, Westwind 2
LockheedJetstar C-140
MitsubishiMU-2 Marquise, MU-2 Solitaire
PiaggioP-180 Avanti
PilatusPC-12, PC-9
PiperAerostar, Aztec, Cheyenne II, Cheyenne III, Chieftan, Navajo, Seneca
Sabreliner40 Series, 60 Series, 70 Series
Shorts330, 360
SikorskyCH-148, H-92 Superhawk, S-61, S-65 (CH53, HH53, MH53, Sea Stallion), S-76 (AUH-76), S-92
Sino SwearingenSJ30-2
*This list is for general reference only and may not be entirely acurate for all aircraft. Please confirm all equipment meets the requirements of your aircraft with the owners/maintenance manuals prior to purchasing or using with your aircraft.

As an authorized Tronair Distributor, we sell factory OEM parts for the 112820CT3. Not sure exactly what part you need? Just describe it or send us a photo and we will research it for you if needed.


We provide short-term and long-term rentals for the 112820CT3. We will ship the item directly to you and arrange for pickup at the end of your lease.

Sell or Trade-In

We can purchase your used 112820CT3 (or similar GSE items like it) and apply it as a credit for new GSE, or buy it outright directly.