Class 4100 Military Spec Chassis

The Class 4100 Military Spec Chassis are convection cooled military tested chassis designs.  These chassis’ are available in 1U through 12U rack heights.  They support various types of passive backplanes, PICMG, motherboards and single board computers.  These chassis are also characterised by their superior structural strength and scalability.  They are perfect for rugged and defence applications.

The Class 4100 Military Spec Chassis are convection cooled military tested reference designs for Chassis.  These chassis incorporate state of the art features tailored to specific applications and environment conditions.  In addition to this, the class 4100 chassis are available in 1U through 12U rack heights.  They also support various types of passive backplanes, PICMG, motherboards and single board computers.  Additional backplane types also supported by these chassis include VME, VME64x, VXS, OpenVPX, etc., CompactPCI, PCIe, PXI, or active motherboards in ATX or Server form factors.  These Chassis also support custom and hybrid host board form factors.

In addition to the features listed above, the 4100 mil-spec chassis also have superior structural strength, virtually non-existent torsional flex and scalability.  They are also low cost, low maintenance, have aggressive and controllable airflow and low MTTR.  Furthermore, each chassis model has undergone Finite Element Analysis (FEA) in order to fully optimise mechanical design. Furthermore, Nova’s engineering process also includes static and dynamic analysis to determine natural frequency in order to  characterise vibration and shock performance.

Please note that some models accommodate Nova’s System Health Monitor (SEM).  This microcontroller-based, I2C monitoring system, monitors and controls key chassis parameters in order to ensure optimal operating conditions.  SEM uses local or remote communication ports, SEM’s HTTP and SNMP to perform its functions.  Thus allowing for fast and simple setup as a result.  SEM monitors qualities such as temperature, fan speed and input and output power levels.  SEM can also perform system power-downs under fault conditions and battlefield short operations when enabled.

Key Features of the Class 4100 Military Spec Chassis

  • Removable and customisable front I/O panels
  • Extensive use of captive hardware
  • Cleanable air filters on all air intakes (where applicable)
  • Louvered air intake and exhaust (where applicable)
  • System Environmental Monitor (SEM) available as an option

 For more information about this product please contact us.


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Standard Models:

Model NumberRack HeightWebpage /Data Sheet
Model 41011UDownload
Model 41022UDownload
Model 41033UDownload
Model 41044UDownload
Model 41055UComing Soon!
Model 41066UComing Soon!
Model 41077UDownload
Model 41088UComing Soon!
Model 41099UComing Soon!
Model 411010UComing Soon!
Model 411111UComing Soon!
Model 411212UComing Soon!

Common Specifications:

The Class 4100 chassis have been tested to and passed the following specifications:

Temperature, operating
  • -20°C to +50°C per MIL-STD-810F
  • Temperature rating can change due to application, environmental conditions or integrated components.
Temperature, non-operating
  • -40°C to +70°C per MIL-STD-810F
  • 10% to 95% per MIL-STD-810F
Altitude, operating
  • -1,000 ft. to  15,000 ft. per MIL-STD-810F
Altitude, non-operating
  • -1,000 ft. to 40,000 ft. per MIL-STD-810F
  • MIL-STD-810F, Method 514.5, Procedure I
  • MIL-STD-810F, Method 516.5, Procedure I & VI
Bench Handling
  • MIL-STD-810F
  • MIL-STD-810F
  • 0° to 30° in any axis
  • MIL-STD-461E, CE101, CE102, CS101, CS114, RE101, RE102, RS102, RS103
  • MIL-STD-1686A
Power Transients
  • MIL-STD-704 or MIL-STD-1275 (optional)
  • Highly resilient with cleanable dust filters
  • Highly resilient when louvered air intakes are installed
Salt Fog
  • MIL-STD-810F, with conformal coated boards
  • MIL-STD-464

Backplanes & Motherboards Supported:

  • All passive Eurocard backplanes supported
    • CompactPCI (cPCI)
    • VME and VME64x (ANSI/VITA 1.1-1997)
    • VXS (ANSI/VITA 41)
    • VPX (VITA 46), OpenVPX (VITA 65) and VPX REDI (VITA 48)
    • Hybrid, custom and semi-custom configurations designed and fabricated in house.
  • 3U or 6U backplane and plug in boards
  • Convection cooled boards.
  • 8”, 0.85”, 1” and mixed board pitch supported
  • Industrial PICMG backplane supported
  • Commercial/Industrial motherboard form factors supports such as ATX, micro-ATX, Mini-ITX, Nano-ITX, Pico-ITX and Intel NUC
  • Embedded and Small form factor single board computers such as PC104, EPIC, EBX, ETX, COMExpress
  • Custom I/O panels can be discretely wired, plug into the backplane via right angle connectors, and/or utilize semi-rigid flex circuitry to maintain a homogenous backplane and I/O board structure.
  • Visit the Custom Backplane page for more information!

Power System:

VDC Input12V, 24V, 28V, 48V, 72V and 270V  nominal input
VAC Input110VAC , 220VAC or auto ranging
47-440Hz aircraft power support
3-phase power input support
CustomCustom configurations can be produced in collaboration with parent company Technology Dynamics, Inc.
EMI FilteringMIL-STD-461 compliant EMI filters produced by sister company Nova Electric are included with all models. Custom and semi-custom configurations available.
Voltage HoldupMIL-STD-704 voltage hold up available as an option


  • Machined aluminium (aerospace grade 6061-T6) housing with formed sheet metal (aluminium 5032-H32) internal structures and brackets
  • Carbon fibre, composites and advanced materials optional and used as necessary
  • Dip braised (optional)
  • Chemical film per MIL-C-5541, Class 3, Gold Colour (standard)
  • Customer defined MIL-Spec painting and silk screen or engraving