MS/MD Series
aPPlication
A range of aluminium electrolytic capacitors
specifically designed for a.c. operation
which help to start the motor by providing a
leading current to the auxillary winding. The
capacitor is not permanently connected to
the winding of the motor and is switched off
after starting, usually automatically.
60/70°C
RoHS
Compliant
• intermittent ac motor starting
• 6.3 mm double amp tags (quick connect types)
• vdE approved to En 60252-2
basic dEsign
Capacitors for this application are designed
for itermittent duty only, and capable of
withstanding the a.c. voltage applied to
the motor during starting. The capacitor
construction comprise either double anode
or O-style (double anode and floating
cathode) windings and are housed in a
moulded plastic case. The MD series is VDE
approved to EN 60252-2 for the defined
ratings.
sPEcification
standards
capacitance range
capacitance tolerance
rated voltage u
r
surge voltage u
s
Endurance life time
+70°c, 1.1u
r
+60°c, 1.1u
r
DIN EN 60252-2:- AC Motor Capacitors - Part 2 : Motor Start Capacitors
25 µF to 750µF
±10% or -0% +25%
120V - 330Vac 50Hz
1.25 x U
R
MD types 500 hrs
(at specified duty cycle)
MS types 500 hrs
(at specified duty cycle)
End of Life requirement:
ΔC/C
< ±10%
cos
ϕ
< 0.2
shelf life
temperature range
2 years
-20°C to +70°C MD types
-20°C to +60°C MS types
dimensions mm
case code
d1 ±0.5
d2 ±0.5
lmax
AA
AB
AC
38
38
38
39
39
39
75
90
116
vdE approvals to En 60252-2
rated voltage
capacitor type
capacitance (µf)
30
40
50
60
70
80
90
100
120
125
220v
md
(note 1)
AA
AA AB
AA AB
AA AB
AB
AB AC
AC
AC
AC
AC
260v
md
(note 2)
AB
AB
AB
AB
AB
note 1: duty cycles approved;
220V @ SD=3 & ED=1.7%
280V @ SD=1 & ED=0.55%
300V @ SD=1 & ED=0.1%
note 2: duty cycles approved;
260V @ SD=3 & ED=1.7%
330V @ SD=1 & ED=0.55%
general approval notes;
• valid for both ±10% and -0 +25% tolerance.
• valid for intermediate capacitance values in increments of 1µF
between 30µF and 100µF and in increments of 5µF between
100µF and 125µF.
KEMET [ KEMET CORPORATION ]
