Cooling Electronics in Ruggedized Transit Cases and Enclosures
Compact, Energy-Efficient Cooling Systems
Cooling Systems for Mobile Electronics in Military and SATCOM OTM Programs
Aspen Systems designs compact, low-voltage military-grade Environmental Control Units (ECUs) for cooling active electronics in operational transit cases.
We have deployed over 10,000 ruggedized ECUs throughout US Military programs, including the Joint Light Tactical Vehicle (JTLV) and Warfighter Information Network-Tactical (WIN-T).
Compact
22.8 cm x 47.0 cm x 17 cm
9.0 in x 18.5 in z 6.7 in
9.1 kg (20 lbs)
High-Capacity
Cools 550 Watts
Heats 300 Watts
Low-Voltage
28 V, 15 A
Highly Efficient
Military Grade
MIL-STD-810
MIL-STD-461
MIL-STD-1275
Military Grade Cooling for Electronics
Aspen Systems’ military-grade environmental control units (ECUs) are engineered to condition air within sealed electronics transit cases, delivering over 550 W of cooling and 300 W of heating.
Designed to meet rigorous Military Standards—including shock, vibration, environmental, and electrical criteria—these units are fully qualified and deployed in large-scale production, with over 10,000 shipped. Currently supporting the JLTV program, they represent a proven, reliable solution for mission-critical applications.
Technical Data, ECU-550 Transit Case Cooling
ECU-550 Specifications
| Nominal Cooling Capacity | 550 Watts |
| Heating Capacity | 300 Watts (Resistive) |
| Operating Ambient Temperature Range | -40°C to 60° (-40°F to 140°F) |
| Storage | -40°C to 71°C (-40°F to 160°F) |
| Maximum Power Draw | 525 Watts (at 32 VDC) 420 Watts (at 28 VDC) |
| Voltage | 28 VDC |
| Maximum Current | 15.0 Amps (at 28 VDC) |
| Altitude | 4.6 km (15,000 ft) |
| Humidity Control | 70% RH between 50°F and 140°F |
| Orientation | <30° from flat |
| Military Standards | MIL-STD 810 MIL-STD-461 MIL-STD-1275 |
| Weight | 9.1 kg (20 lb) |
| Dimensions H x W x D | 22.8 x 47.0 x 17.0 cm (9.0 x 18.5 x 6.7 in) |
Air Flow of Transit Case Cooling System
Aspen Systems’ Environmental Control Units (ECUs) feature a dual-loop design engineered to deliver exceptional thermal management while protecting sensitive electronics from external contaminants.
The ‘clean loop’ circulates conditioned air within a sealed chamber, ensuring electronics remain isolated from dust, moisture, and debris. Simultaneously, the ‘dirty loop’ efficiently expels heat to the external environment, maintaining optimal internal temperatures. Built to meet stringent military standards for ruggedness, reliability, and compact performance, our ECUs provide powerful, low-maintenance cooling solutions for mission-critical and industrial applications.
Thermoelectric vs ECU Performance
Aspen’s ECU-550 leverages vapor compression refrigeration to
outperform thermoelectric and Peltier cooling in every key metric.
66%
Smaller
77%
Less Power Consumption
82%
Lighter
Get a Quote | Application Questions
Please send us your requests; our team is happy to help.
You can also reach us by email at: info@aspensystems.com
or by phone number at (508) 281-5322