JD50-03 product details and specifications:

GENERAL OVERVIEW 

• Unit Model: JD50-03 | Rating: 50 kWe Standby | Fuel: Diesel 

• Frequency: 60 Hz | Speed: 1800 RPM 

• Voltage Options: Single Phase 120/240V or Three Phase 277/480V 

• Power Factor: 0.8 (3-phase) | 1.0 (single phase 240V) 

• EPA Tier 3 Certified | UL 2200 & cUL Listed | CSA Certified 

• Seismic Certified to IBC 2021 | NFPA 110 Level 1 & Level 2 Compliant 

• Standard Colors: White / Gray | Custom colors available 

ENGINE 

• Manufacturer: John Deere | Model: 4045TF280 

• Type: 4-Cycle, 4-Cylinder Inline | Aspiration: Turbocharged 

• Displacement: 275 Cu. In. (4.50 L) | Bore: 4.19 in. x Stroke: 5.00 in. 

• Compression Ratio: 19.0:1 | Rated RPM: 1800 

• Max Standby Power: 75 HP (56 kW) 

• Governor: Electronic Isochronous 

• Radiator cooled, unit mounted; sized for 50°C ambient 

• Blower fan and fan drive | Starter and alternator 

• Oil pump and filter | Oil drain extension with valve plumbed to bulkhead fitting 

• Flexible fuel connector 

EXHAUST SYSTEM 

• Standby Gas Temp (Stack): 945°F (507°C) 

• Gas Volume at Stack Temp (Standby): 448 CFM (12.7 m³/min) 

• Max Allowable Exhaust Restriction: 30.0 in. H2O (7.50 kPa) 

• Critical Grade Compact CPJ Series Silencer – mounted to engine 

COOLING SYSTEM 

• Unit-mounted radiator, ambient capacity: 122°F (50°C) 

• Max Allowable Static Pressure on Radiator Exhaust: 0.50 in. H2O (0.12 kPa) 

• Water Pump Flow Rate: 38.0 GPM (144 L/min) 

• Heat Rejection to Coolant: 1,821 BTUM (31.9 kW) 

• Heat Radiated to Ambient: 1,038 BTUM (18.2 kW) 

AIR SYSTEM 

• Air Cleaner: Dry Single Stage 

• Aspirating Air Flow: 180 CFM (5.09 m³/min) 

• Air Flow Required for Radiator Cooled Unit: 4,760 CFM (135 m³/min) 

FUEL CONSUMPTION 

• At 100% of Power Rating: 4.23 gal/hr (16.0 L/hr) 

• At 75% of Power Rating: 3.37 gal/hr (12.8 L/hr) 

• At 50% of Power Rating: 2.32 gal/hr (8.78 L/hr) 

FLUIDS CAPACITY 

• Total Oil System: 3.88 gal (14.7 L) 

• Engine Jacket Water Capacity: 2.25 gal (8.52 L) 

• System Coolant Capacity: 5.38 gal (20.4 L) 

ALTERNATOR / GENERATOR 

• Model: Stamford UCI224D | Type: Brushless Single Bearing 

• Winding: 12 Lead Wye (480V standard config) | Winding Pitch: 2/3 

• Poles: 4 Pole, Rotating Field | Protection: IP23 

• Insulation System: Class H 

• Standby Temperature Rise: 125°C over 40°C ambient 

• Voltage Regulation: ±1% | Max Harmonic Content: 5% 

• Standards: NEMA MG 1, IEEE, ANSI compliance 

• 100% of rated load – one step | Short Circuit Ratio: 1/Xd 

• Bearing Drive End: Ball 6312-2RS (ISO) | Non-Drive End: Ball 6309-2RS (ISO) 

• Max Overspeed: 2250 RPM 

• Stator Winding Resistance: 0.129 Ohms per phase at 22°C (series star connected) 

• Rotor Winding Resistance: 0.64 Ohms at 22°C 

VOLTAGE REGULATOR 

• Model: Stamford AS440 Automatic Voltage Regulator 

• Type: Half-wave phase controlled thyristor AVR, Surface Mount Technology (SMT) 

• Regulation: ±1% with 4% engine governing 

• External Voltage Adjustment: ±10% with 1k ohm 1-watt trimmer 

• Soft Start Ramp Time: 3 seconds | Thermal Drift: 0.03% per 1°C 

• Over Excitation Protection Set Point: 65VDC | Time Delay: 10–15 seconds (fixed) 

• Under Frequency Protection Set Point: 94–98% Hz 

CONTROL PANEL 

• Model: Blue Star DCP7310 Microprocessor-Based Gen-Set Controller 

• Mounted facing left from generator end (unless specified otherwise) 

• NEMA 12 enclosure | IP65 rating with supplied gasket 

• 4-Line back-lit LCD display | Five-key menu navigation | Front panel PIN editing 

• 8 programmable contact inputs | 10 contact outputs | RS485 communicator interface 

• CAN Bus (J1939) ECU communications | USB connectivity 

• Standard shutdowns: Low Oil Pressure, High Coolant Temp, Overspeed, Overcrank 

• Emergency Stop Pushbutton | Audible Alarm Buzzer with Silencing Switch 

• Standard alarms: Low Oil Pressure, High/Low Coolant Temp, Weak Battery, Low Fuel Level, Fuel Leak Detect 

• cULus Listed, CE Approved | NFPA 110 Level 1 Compatible 

• Windows-Based Software | Multilingual Capability | Event Recording 

• Remote communications to DSE2548 Remote Annunciator 

ENCLOSURE 

• Level 2 – Weather Proof with Foam 

• Material: Powder-coated 14-gauge steel | Wind Rating: 200 MPH (IBC 2021, ASCE/SEI 7-16) 

• Pitched roof for increased structural integrity and improved watershed 

• Punched intake with baffle and punched exhaust openings 

• Keyed alike lockable doors with draw down latches and stainless steel component hinges 

• Sound attenuation: 1.5" Polydamp Type D Acoustical Foam (PAF) installed 

• Formed steel base with mounting and lifting holes 

• Vibration isolation mounts included 

ELECTRICAL COMPONENTS 

• Mainline Breaker: 80 Amp 3 Pole 480 Volt, Mounted & Wired in NEMA 1 Enclosure 

• Battery: 12 Volt system with rack and cables 

• Battery Charger: 12V 6 Amp (BC1206A Series), Mounted and Wired to Terminal 

• Jacket Water Heater: 1500W 120VAC, rated for -20°F with isolation valves 

• Oil Drain Extension: Plumbed to bulkhead fitting in base 

SUB-BASE FUEL TANK 

• Type: UL 142 Listed, Double Wall with Secondary Containment 

• 24-Hour Option: 120 Gallon | Dimensions with enclosure: L 80 in. x H 80 in. x W 38 in. 

• 48-Hour Option: 240 Gallon | Dimensions with enclosure: L 80 in. x H 96 in. x W 38 in. 

• 72-Hour Option: 360 Gallon | Dimensions with enclosure: L 108 in. x H 96 in. x W 38 in. 

• Includes: Supply & Return Connections, Fuel Level Gauge, Fuel Leak Switch, Fill & Vent Plumbing 

• Stub-up area for electrical wiring | Low fuel level and fuel leak alarms 

WEIGHTS & DIMENSIONS (GENSET) 

• OPU: 80 x 38 x 58 in. | Weight: 2,125 lbs. 

• Level 1 Enclosure: 90 x 38 x 60 in. | Weight: 2,625 lbs. 

• Level 2 Enclosure: 90 x 38 x 60 in. | Weight: 2,675 lbs. 

• Level 3 Enclosure: 120 x 38 x 60 in. | Weight: 2,825 lbs. 

• Note: Allow 6–12 inches for height of exhaust stack. All dimensions in inches. 

SOUND LEVELS (@ 23 ft / 7 m per ISO 8528-10) 

• OPU: No Load 73 dBA | Full Load 77 dBA 

• Level 1 Enclosure: No Load 71 dBA | Full Load 73 dBA 

• Level 2 Enclosure: No Load 68 dBA | Full Load 70 dBA 

• Level 3 Enclosure: No Load 63 dBA | Full Load 65 dBA 

RATINGS (60 Hz) 

• 240V Single Phase: 50 kWe | 208 Amps | Generator UCI224F | 12 Lead DD | PF 1.0 | 125°C/40°C 

• 208V Three Phase: 50 kWe | 174 Amps | Generator UCI224E | 12 Lead Wye | PF 0.8 | 125°C/40°C 

• 240V Three Phase: 50 kWe | 151 Amps | Generator UCI224E | 12 Lead Delta | PF 0.8 | 125°C/40°C 

• 480V Three Phase: 50 kWe | 75 Amps | Generator UCI224D | 12 Lead Wye | PF 0.8 | 125°C/40°C 

• 600V Three Phase: 50 kWe | 60 Amps | Generator UCI224D | 4 Lead Wye | PF 0.8 | 125°C/40°C 

FACTORY TESTING 

• Standard commercial factory load test included 

• Verification of alarm shutdowns, voltage settings, block loading to rated kWe and PF 

• Tested in accordance with MIL-STD-705C and NFPA 110 standards 

• Test metering accuracy: 1.3% or better, NIST traceable 

WARRANTY 

• 2 Year / 2,000 Hour Standby Limited Warranty (parts and labor from date of factory invoice) 

• Accessories: 1 Year / 2,000 Hour Limited 

product specifications:

product related documents:

JD50-03 Engine Data Sheet 12-5-23.pdf

JD50-03_SpecSheet.pdf

2026 EPA Cert 350ham-tjdxl04-5141-007 JD40-03, JD50-03, JD60-02.pdf

JD50-03_Drawings.pdf