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A.4 Environmental Specifications
A.4.1 Convection-cooled Boards
Table A-4 Convection-cooled Environmental Specifications
Build Style
Temperature (°C)
Standard
Operating: 0 to
(Level 1)
+55 with airflow of
300 feet/minute.
Storage: -50 to
+100
Extended
Operating: -20 to
Temperature
+65 with airflow of
(Level 2)
300 feet/minute
Storage: -50 to
+100
Rugged Air-
Operating: -40 to
cooled
+75 with airflow of
(Level 3)
600 feet/minute
Storage: -50 to
+100
A.4.2 Conduction-cooled Boards
Table A-5 Conduction-cooled Environmental Specifications
Build Style
Temperature (°C)
Rugged
Operating: -40 to
Conduction-
+75 at the thermal
cooled (Level 4)
interface
Storage: -50 to
+100
Rugged
Operating: -40 to
Conduction-
+85 at the thermal
cooled (Level 5)
interface
Storage: -50 to
+100
A.4.3 Spray-cooled Boards
Table A-6 Spray-cooled Environmental Specification
Build Style
Temperature (°C)
Spray-cooled
Operating: -40 to
(Level 6)
+90 maximum
component case
tempeature
Storage: -50 to
+100
Publication No. GBX24-0HH/2
Vibration
Shock
Random: 0.002g 2 /Hz
20g peak
sawtooth,
from 10 to 2000 Hz
11 ms duration
Sine: 2g from 5 to
500 Hz
Random: 0.002g 2 /Hz
20g peak
sawtooth,
from 10 to 2000 Hz
11 ms duration
Sine: 2g from 5 to
500 Hz
0.04g
/Hz
20g peak
Random:
2
sawtooth,
from 20 to 2000 Hz,
11 ms duration
with a flat response
to 1000 Hz.
6 dB/Octave roll-off
from 1000 to 2000 Hz.
Vibration
Shock
0.1g
/Hz
40g peak
Random:
2
sawtooth,
from 15 to 2000 Hz
11 ms duration
per MIL-STD-810E
Fig 514.4 – 8 for high
performance aircraft.
12g RMS
0.1g
/Hz
40g peak
Random:
2
sawtooth,
from 15 to 2000 Hz
11 ms duration
per MIL-STD-810E
Fig 514.4 – 8 for high
performance aircraft.
12g RMS
Vibration
Shock
0.04g
2
/Hz
20g peak
Random:
sawtooth,
from 20 to 2000 Hz
11 ms duration
with a flat response
to 1000 Hz.
6 dB/Octave roll-off
from 1000 to 2000 Hz
Humidity
Comments
Up to 95% RH
Commercial grade cooled by forced air, for
use in benign environments and software
development applications. Optional
conformal coating
Up to 95% RH with
As Standard but conformally coated and
varying temperature.
temperature characterized
10 cycles,
240 hours
Up to 95% RH with
Wide temperature rugged, cooled by forced
varying temperature.
air. Conformally coated for additional
10 cycles,
protection
240 hours
Humidity
Comments
Up to 95% RH with
Designed for severe environment
varying temperature.
applications with high levels of shock and
10 cycles,
vibration, small space envelope and
240 hours
restricted cooling supplies. Conformally-
coated as standard. Optional ESS
Up to 95% RH with
Designed for severe environment
varying temperature.
applications with high levels of shock and
10 cycles,
vibration, small space envelope and
240 hours
restricted cooling supplies. Conformally-
coated as standard. Optional ESS
Humidity
Comments
Up to 95% RH with
Conformally-coated as standard
varying temperature.
10 cycles,
240 hours
Specifications 41
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