Specifications

Environmental Characteristics
Storage Temperature -40°C to 85°C
Altitude Derate 2.6% total output power for each 1,000 ft to a maximum operating
altitude of 15,000 ft. Non-operating storage maximum altitude is 40K
Operating Temperature** -20°C to 40°C full power; -20°C to 60°C half power
-40°C optional with rugged chassis (-MI or -MC suffix )
Shock and Vibration Mil-STD 810 (MI rugged chassis ONLY)
Humidity 0 to 95% non-condensing
Safety Agency Approvals cURus – UL 60950-1, CSA 60950-1
cTUVus – EN 60950-1, UL 60950-1, CSA 60950-1
CE Mark – Low Voltage Directive, 73/23/EEC amended by 93/68/EEC
Note: some MI chassis will not carry all safety approvals
Product Weights (fully configured) MP Chassis MX Chassis
9.75 lbs (4,42 kgs) 10 lbs (4,54 kgs)
Warranty 2 years limited warranty.
See vicorpower.com for complete warranty statement.
* See Vicor module specifications. A preload may be necessary for modules trimmed down below 90% of
normal output voltage.
** The maximum operating temperature is 40°C. If using a VI-200 with output voltage less than 12V and
more than 150 Watts, the operating temperature decreases to 35°C. This also applies when using a FinPAC
with output voltage less than 24 V and more than 500 Watts.
Output Studs
New, more robust output studs (with a 3 to 1 safety margin @ 45 in. lbs.) were installed in ConverterPACs,
the slide-in assemblies used in the MegaPAC Family. These new outputs studs are 1/8" longer to allow for multiple
lugs. They are fully compatible with the original flanged nut ConverterPACs for use in parallel arrays. Other advan-
tages include:
• Inner nut (that might become loose) replaced by a brass insert
• Stronger connection to the PCB
• Improved conductivity (less voltage drop and heating)
• Both the stud and panel are less likely to break due to over torqueing
Shown below are the original and re-designed studs.
Original Redesigned
Refer to page 12 for dimensional data.
Pg 22 Vicor 800-735-6200 Westcor Division 408-522-5280 Applications Engineering 800-927-9474 Rev. 4/2010
PFC MegaPAC Design Guide