Auxiliary Power Unit – A1621K
A1621K / ONBOARD AUXILIARY POWER Auxiliary Power Unit – A1621K
The Auxiliary Power Unit – A1621K is an onboard auxiliary power system developed to maintain critical military vehicle systems when the main engine is switched off or unavailable. It supports electrical, pneumatic and hydraulic subsystems, onboard climate control and mission equipment while helping military platforms sustain operational readiness across extended mission profiles.
Integrated auxiliary power platform for main-engine-off operation, co-generation, mission-system support and extended deployment requirements.
Independent Auxiliary Power for Extended Mission Profiles
The Auxiliary Power Unit – A1621K supplies continuous power to selected vehicle systems without requiring the main engine to remain operational. It supports pre-mission activities including weapon-system testing, onboard diagnostics and main-engine cooling, while helping maintain essential functionality when the primary engine is damaged or unavailable.
The system can also support deployed platforms in locations where fixed external power infrastructure is unavailable.
Integration Across Ground, Stationary and Selected Airborne Platforms
The A1621K is intended for tracked and wheeled armored vehicles, tactical and support vehicles, stationary systems and selected airborne platforms. Supplied application examples include main battle tanks, self-propelled artillery systems, armored and infantry fighting vehicles, armored personnel carriers, MRAP vehicles, rocket systems, shelters, tents, helicopters and aircraft.
Depending on platform layout and mission requirements, the system can be installed inside a sound-insulated compartment or mounted externally to address thermal dissipation, acoustic management and packaging requirements.
Power12
kVA
Power Architecture for Multi-System Vehicle Loads
The broader APU architecture described in the supplied information supports configurations from 2 kW to 20 kW and provides 24/28 VDC as well as higher AC and DC voltage options. The A1621K technical table specifically lists 10 kW continuous power and 12 kVA output power.
The system is integrated with the vehicle's fuel and control architecture and draws fuel directly from the vehicle fuel tank, eliminating the need for a separate fuel tank or battery. Depending on operational requirements, air-cooled or liquid-cooled diesel architectures may be configured; the A1621K technical table specifically lists Water Cooled.
A1621K Auxiliary Power Features
Main-Engine-Off Power
The A1621K supports selected onboard systems without requiring continuous operation of the vehicle's main engine.
Autonomous Deployment Support
Onboard auxiliary power supports operations in areas where fixed external power infrastructure is unavailable.
Co-Generation Capability
The APU can operate alongside the main generator and compensate for electrical shortfalls created by additional equipment.
Vehicle Fuel Integration
The system draws fuel directly from the vehicle fuel tank without requiring a separate APU fuel reservoir.
Automatic & Manual Start
The control interface supports automatic and manual starting across different mission scenarios.
Real-Time Monitoring
The digital control unit provides access to operating parameters and fault-condition information.
Electrical, Cooling and Control Configuration
Electrical Output
- Output Voltage
- 28 VDC.
- Continuous Power
- 10 kW.
- Output Power
- 12 kVA.
Vehicle Integration
- Fuel Source
- Vehicle fuel tank.
- Dedicated Tank / Battery
- Not required according to the supplied product information.
- Cooling
- Water Cooled according to the A1621K technical table.
Control & Monitoring
- Electronic Control Unit
- IP67-rated ECU with digital display.
- Start Modes
- Automatic and manual.
- Displayed Data
- Temperature, fuel level, pressure, DC current, battery voltage and fault conditions.
Operational Applications
Coordinated Power Support for Multiple Mission Subsystems
The A1621K can supply onboard electronics, hydraulic and pneumatic systems, climate-control units, weapon systems, communication equipment, fire suppression systems, power distribution units and KBRN systems independently of continuous main-engine operation.
In co-generation mode, the APU operates alongside the vehicle's main generator, monitors onboard electrical demand and compensates for shortfalls when additional mission equipment increases the required load.
Environmental, EMC, Electrical and Reliability References
The supplied product information states that the A1621K is designed and tested in accordance with the following military standards for electromagnetic compatibility, environmental performance, electrical power and reliability considerations.
Frequently Asked Questions
01What continuous and output power values are specified for the A1621K?
The technical table specifies 10 kW continuous power and 12 kVA output power.
02What maximum current is listed for the A1621K?
The supplied technical data lists a maximum current of 180 A.
03What operating and storage temperature ranges are specified?
The operating range is -32°C ~ +55°C, while the storage range is -40°C ~ +60°C.
04What noise level and maximum operating elevation are listed?
The technical table specifies 70 dB @ 7 m and a maximum operating elevation of 3000 m.
05What system weight and dimensions are specified for the A1621K?
The supplied data lists 92 Kg ±20 and dimensions of 1065mmx660mmx460mm ±5.
Technical Data
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Contact our team for A1621K vehicle integration, auxiliary power, cooling and mission-system requirements.