Adaptec AHA-1740A - Manual (Page 21)

Product Specifications
The following table lists some of the physical product descriptions
relating to the AHA-1740A/1742A/1744 Host Adapters.
Physical Dimensions
Length 13-3/8 inches
Width 5/8 inch
Height 5 inches
Standard EISA-compatible form factor
Power Requirements
+ 5.0 +/- 0.25 Volts at 2.9 Amps (maximum)
Environmental Requirements
Temperature -40 ° - 75 ° C (operating or storage)
Reliability Information
Mean Time Between Failures (MTBF): 100,000 hours
(calculated per Mil Handbook 217E, ground benign, 40 C)
Mean Time Between Failures (MTBF): (calculated)
1740A 60,462 hours
1742A 57,600 hours
1744 54,856 hours
Mean Time To Repair (MTTR): 30 minutes
Table 1-3. AHA-1740A/1742A/1744 Product Specifications
EISA-to-Fast SCSI Host Adapter Overview
1-7