2-Unit Long Stack CubeSat structure

Flight heritage since 2017


The ISIS 2-Unit Long Stack CubeSat structure is developed as a generic, modular satellite structure based upon the CubeSat standard. The design created by ISIS allows for a ~1,5U stack, giving CubeSat developers maximum flexibility in their design process.
The stack of PCBs and other flight modules can be build up first in the secondary structure and integrated with the deployer interface guide rails at the end of the process, ensuring accessibility of the flight avionics. In addition, the use of these profiles guide rails and detachable shear panels allows for access to all parts of the spacecraft avionics, even after final integration by removing one or more of the shear panels.
The modular chassis allows for one ~1,5-Unit stack of PCBs or other module and a ~0,5U payload to be mounted inside the chassis.

Availability: 4-6 weeks

  • Features
  • Product properties
  • Product options
  • Qualification and acceptance testing
  • Packaging
  • Documents/CAD


  • Highly modular design
  • Detachable side panels for maximum accessibility
  • Dual Kill-switch mechanism
  • Scalable design to larger CubeSat form factors
  • Compatible with most of CubeSatShop products

Product Properties

Value Unit
Primary Structure Mass 164.0 gram
Primary + Secondary Structure Mass 197.9 gram
Outside Envelope (l x w x h) 100 x 100 x 227.0 mm
Inside 0.5U Payload Envelope (l x w x h) ~ 84 x 84 x 54.4 mm
Inside 1.5U Avionics Envelope (l x w x h) ~ 97.2 x 97.2 x 157.5 mm
Thermal Range (min – max) -40 to +80 °C

*Primary mass consists of Stack Brackets, Guiderails and 2 KillSwitch mechanisms
Secondary mass includes the Stack Rods (Side Shear Panels not included)

Available Product Options

  • Different PCB form factors
    • PC/104 CubeSatKit compatible (Default)
    • Custom designs
  • Cutomized structural elements
    • Special mount points
    • Cut-outs
    • Special surface treatments
    • Custom stack length

Qualification and Acceptance testing

Test QT AT
Mechanical Shock
Thermal Cycling
Thermal Vacuum
Total Ionizing Dose

Packaging Information

  • Contents
    • Primary Structure parts (Frames, Rails)
    • Secondary Structure parts (shear panels, PCB mounting elements) on demand
    • Kill-Switch mechanism (2x)
    • Dummy PCBs
    • Fasteners
    • User Manual and installation Guide
  • Packaging
    • Boxed in transparent storage case