Datasheet

3© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 864-963-6300 • www.kemet.com A4041_MS_MD • 8/10/2016
AC Motor Start Aluminum Electrolytic Capacitors – MS/MD Series, +60ºC/+70°C
Dimensions – Millimeters
L Maximum
SIDE VIEW TERMINAL
END VIEW
D
Safety Vent
D2
Size Code
Dimensions in mm
D D2 L
±0.5 ±0.5 Maximum
AA
38
39
75
AB
38
39
90
AC
38
39
116
Power Factor
The tangent of the loss angle for motor start capacitors shall not exceed 0.1 and shall be calculated as follows:
Tan δ =
W
=
true watts
V x I
apparent watts
Duty Cycle
The standard rating is 1.67% or 1/60th full time and corresponds to a maximum duty of 20 starts, each of three seconds
duration per hour. It is expressed as 3/1.67 (a 3 minute cycle with 1.67% duration during which the capacitor may be
energized). If the same capacitor is to be used for a duty cycle of 60 starts per hour the cycle duration will be 1 minute.
The operation time per cycle will then have to be reduced to 1.67% of 1 minute (i.e. 1 second). Alternative duty cycles are
available on request.
Presence of Run Capacitor
When the motor is tted with both starting and run capacitors, consideration should be given to tting of the appropriate
discharge resistor to the starting capacitor. This is to protect the run capacitor from damage through discharge of the
starting capacitor.
Container Form
Cylindrical mouldings, meeting creepage and clearance distances, according to IEC 60335–1 and ammability ratings
according to UL94–V1.