AC Motor Start Aluminum Electrolytic Capacitors
MS/MD, +60°C/+70°C
Overview
Applications
KEMET's MS/MD Series of aluminum electrolytic
capacitors are designed for intermittent duty only and
capable of withstanding the AC voltage applied to the
motor during starting. The capacitor construction is
comprised of either double anode or O-style (double anode
and floating cathode) windings, which are housed in a
molded plastic case. KEMET's MD Series is VDE approved
to IEC 60252–2 for the defined ratings.
KEMET's MS/MD capacitors are a range of aluminium
electrolytic capacitors specifically designed for AC
operation which helps to start the motor by providing a
leading current to the auxiliary winding. The capacitor is
not permanently connected to the winding of the motor and
is usually switched off automatically after starting.
Benefits
• Intermittent AC motor starting
• 6.3 mm double amp tags (quick connect types)
• VDE approved to IEC 60252–2
Part Number System
080
MS
12
AA
M
A
1
STD
Capacitance Code
(µF)
Rating
Rated Voltage
(VAC)
Size Code
Manufacturing
Style
Capacitance
Tolerance
Terminal Code
Version
A = −0% +25%
K = ±10%
1 = Double amp
tag
STD = Standard
Example:
080 = 80 µF
120 = 120 µF
MS = Motor start 12 = 120
single rating
22 = 220
MD = Motor
26 = 260
start dual rating
See Dimension
Table
M = Molded
case
Built Into Tomorrow
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4041_MS_MD • 8/8/2023
1
AC Motor Start Aluminum Electrolytic Capacitors – MS/MD, +60°C/+70°C
Performance Characteristics
Item
Performance Characteristics
MD (Dual voltage rating)
MS (Single voltage rating)
25 – 750 µF
25 – 750 µF
120 – 360 VAC 50 Hz
120 – 260 VAC 50 Hz
Operating Temperature
−20°C to +70°C
−20°C to +60°C
Capacitance Tolerance
±10%, −0% +25%
±10%, −0% +25%
500 hours at +70°C, 1.1 VR (specified duty cycle)
500 hours at +60°C, 1.1 VR (specified duty cycle)
2 years
2 years
Series
Capacitance Range
Rated Voltage
Operational Lifetime
Shelf Life
Standards
IEC 60252–2: AC Motor Capacitors - Part 2: Motor Start Capacitors
VDE Approvals to IEC 60252–2
Rated Voltage
220 V
260 V
Capacitor Type
MD
MD
Capacitance (µF)
(Note 1)
(Note 2)
30
AA
40
AA AB
AB
50
AA AB
AB
60
AA AB
AB
70
AB
AB
80
AB AC
AB
90
AC
AC
100
AC
AC
120
AC
AC
125
AC
AC
Note 1: Duty cycles approved
220 V at SD = 3 & ED = 1.7%
300 V at SD = 1 & ED = 0.1%
Note 2: Duty cycles approved
260 V at SD = 3 and ED = 1.7% (40 – 125 µF)
330 v at SD = 1 and ED = 0.55% (40 – 125 µF)
360 v at SD = 1 and ED = 0.33% (90 – 125 µF)
General approval notes:
• Valid for both ±10% and −0+25% tolerance.
• Valid for intermediate capacitance. Values in increments of 1 µF between 30 µF and 100 µF, and in increments of 5 µF between 100 µF and 125 µF.
• Approved duty cycles relate to 50 Hz, as per section 3.1.12.2 of IEC60252–2 operation at 60 Hz is also approved if the relative operation time is reduced
by 20%. For example a 50 Hz duty cycle with ED = 1.7% is also approved for 60 Hz with ED = 1.36%.
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4041_MS_MD • 8/8/2023
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AC Motor Start Aluminum Electrolytic Capacitors – MS/MD, +60°C/+70°C
Dimensions – Millimeters
SIDE VIEW
TERMINAL
END VIEW
L Maximum
Safety Vent
D
Size Code
AA
AB
AC
D2
D
Dimensions in mm
D2
L
±0.5
±0.5
Maximum
38
38
38
39
39
39
75
90
116
Power Factor
The tangent of the loss angle for motor start capacitors shall not exceed 0.1 and shall be calculated as follows:
true watts
W
Tan δ =
=
apparent watts
VxI
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 fitted with both starting and run capacitors, consideration should be given to fitting 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 flammability ratings
according to UL94–V1.
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4041_MS_MD • 8/8/2023
3
AC Motor Start Aluminum Electrolytic Capacitors – MS/MD, +60°C/+70°C
Dimensions – Millimeters cont.
Discharge Resistors
A discharge resistor may be fitted to a motor start capacitor to prevent electrical overstress of the capacitor and/or for
safety reasons. In accordance with IEC 60252, the resistor value should be such that it reduces the voltage on the capacitor,
from the line voltage to less than 50 V within 60 seconds. The resistor value may be approximated as follows: R(kOhms) =
T/Rated Capacitance (µF)
AC Voltage
T
Resistor Value (kOhms)
Wattage
120
50,000
5.6
2W
220
32,000
15
2W
260
30,000
33
0.5W
280
28,000
56
1W
330
26,000
82
2W
100
1W
Environmental Compliance
All Part Numbers in this datasheet are Reach and RoHS compliant and Halogen-Free.
As an environmentally conscious company, KEMET is working continuously with improvements concerning the environmental
effects of both our capacitors and their production.
In Europe (RoHS Directive) and in some other geographical areas such as China, legislation has been put in place to prevent
the use of some hazardous materials, such as lead (Pb), in electronic equipment. All products in this catalog are produced
to help our customers' obligations to guarantee their products and fulfill these legislative requirements. The only material of
concern in our products has been lead (Pb), which has been removed from all designs to fulfill the requirement of containing
less than 0.1% of lead in any homogeneous material. KEMET will closely follow any changes in legislation worldwide and
make any necessary changes in its products, whenever needed.
Some customer segments such as medical, military and automotive electronics may still require the use of lead in electrode
coatings. To clarify the situation and distinguish products from each other, a special symbol is used on the packaging labels
for RoHS compatible capacitors.
Due to customer requirements, there may appear additional markings such as lead-free (LF), or lead-free wires (LFW) on the
label.
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4041_MS_MD • 8/8/2023
4
AC Motor Start Aluminum Electrolytic Capacitors – MS/MD, +60°C/+70°C
Table 1A – Ratings & Part Number Reference
VAC
Rated Capacitance
Minimum (µF)
Maximum (µF)
120
120
120
120
120
120
120
120
120
120
120
120
25
25
85
90
120
130
25
25
85
90
120
130
325
360
460
510
670
750
325
360
460
510
670
750
VAC
Rated Capacitance
Capacitance Case Size
Tolerance
D x L (mm)
−0/+25%
±10%
−0/+25%
±10%
−0/+25%
±10%
−0/+25%
±10%
−0/+25%
±10%
−0/+25%
±10%
38 x 75
38 x 75
38 x 90
38 x 90
38 x 116
38 x 116
38 x 75
38 x 75
38 x 90
38 x 90
38 x 116
38 x 116
Capacitance
Tolerance
Case Size
Duty Cycle
120 VRMS
Part Number
150 VRMS
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
0.55%
0.55%
0.55%
0.55%
0.55%
0.55%
Duty Cycle
Approval
VDE
CQC
(1)MS12AAMA1STD
(1)MS12AAMK1STD
(1)MS12ABMA1STD
(1)MS12ABMK1STD
(1)MS12ACMA1STD
(1)MS12ACMK1STD
(1)MD12AAMA1STD
(1)MD12AAMK1STD
(1)MD12ABMA1STD
(1)MD12ABMK1STD
(1)MD12ACMA1STD
(1)MD12ACMK1STD
-
x
x
x
x
x
x
Part Number
VDE
CQC
(1) Insert capacitance code. Valid in increments of 1 μF between 30 μF and 100 μF, and in increments of 5 μF above 100 μF
Table 1B – Ratings & Part Number Reference
Rated Capacitance
Case Size
Duty Cycle
Minimum (µF)
Maximum (µF)
Capacitance
Tolerance
D x L (mm)
220 VRMS
220
220
220
220
220
220
220
220
220
220
220
220
30
30
40
40
55
65
30
30
40
40
80
80
65
70
90
100
140
150
60
60
80
80
125
125
−0/+25%
±10%
−0/+25%
±10%
−0/+25%
±10%
−0/+25%
±10%
−0/+25%
±10%
−0/+25%
±10%
38 x 75
38 x 75
38 x 90
38 x 90
38 x 116
38 x 116
38 x 75
38 x 75
38 x 90
38 x 90
38 x 116
38 x 116
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
VAC
Rated Capacitance
Capacitance
Tolerance
Case Size
VAC
Part Number
300 VRMS
0.10%
0.10%
0.10%
0.10%
0.10%
0.10%
Duty Cycle
Approval
VDE
CQC
(1)MS22AAMA1STD
(1)MS22AAMK1STD
(1)MS22ABMA1STD
(1)MS22ABMK1STD
(1)MS22ACMA1STD
(1)MS22ACMK1STD
(1)MD22AAMA1STD
(1)MD22AAMK1STD
(1)MD22ABMA1STD
(1)MD22ABMK1STD
(1)MD22ACMA1STD
(1)MD22ACMK1STD
x
x
x
x
x
x
x
x
x
x
x
x
Part Number
VDE
CQC
(1) Insert capacitance code. Valid in increments of 1 μF between 30 μF and 100 μF, and in increments of 5 μF above 100 μF
Table 1C – Ratings & Part Number Reference
Rated Capacitance
Case Size
D x L (mm)
260 VRMS
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
1.67%
Minimum (µF)
Maximum (µF)
Capacitance
Tolerance
260
260
260
260
260
260
260
260
260
260
260
260
25
25
35
35
50
55
25
25
40
40
90
90
55
60
75
85
110
125
50
55
80
80
125
125
−0/+25%
±10%
−0/+25%
±10%
−0/+25%
±10%
−0/+25%
±10%
−0/+25%
±10%
−0/+25%
±10%
38 x 75
38 x 75
38 x 90
38 x 90
38 x 116
38 x 116
38 x 75
38 x 75
38 x 90
38 x 90
38 x 116
38 x 116
VAC
Rated Capacitance
Capacitance
Tolerance
Case Size
VAC
Duty Cycle
330 VRMS
0.55%
0.55%
0.55%
0.55%
0.55%
0.55%
Duty Cycle
360 VRMS
0.33%
0.33%
Part Number
Approval
VDE
CQC
(1)MS26AAMA1STD
(1)MS26AAMK1STD
(1)MS26ABMA1STD
(1)MS26ABMK1STD
(1)MS26ACMA1STD
(1)MS26ACMK1STD
(1)MD26AAMA1STD
(1)MD26AAMK1STD
(1)MD26ABMA1STD
(1)MD26ABMK1STD
(1)MD26ACMA1STD
(1)MD26ACMK1STD
x
x
x
x
x
x
x
x
x
x
x
x
Part Number
VDE
CQC
(1) Insert capacitance code. Valid in increments of 1 μF between 30 μF and 100 μF, and in increments of 5 μF above 100 μF
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4041_MS_MD • 8/8/2023
5
AC Motor Start Aluminum Electrolytic Capacitors – MS/MD, +60°C/+70°C
Marking
Rated Capacitance,
Capacitance Tolerance
Climatic Category
Made in China
KEMET Logo
Rated Voltage (VAC)
Part Number Code
Date of Manufacture,
Batch Number
Construction
Amp Tag
Terminal
Molded Plastic
Case
Detailed Cross Section
Safety Vent
Deck
Laser Welded
Terminal Tab
Laser Welded
Terminal Tabs
Margin
Molded Plastic
Case
Deck
Paper Spacer Impregnated
with Electrolyte
(First Layer)
Cathode Aluminum Foil,
Etched (Second Layer)
Paper Spacer Impregnated with Anode Aluminum Foil, Etched,
Electrolyte (Third Layer)
Covered with Aluminum Oxide
(Fourth Layer)
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
Amp Tag
Terminal
Safety Vent Plug
Safety Vent
Amp Tag
Terminal
A4041_MS_MD • 8/8/2023
6
AC Motor Start Aluminum Electrolytic Capacitors – MS/MD, +60°C/+70°C
KEMET Electronics Corporation Sales Offices
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Disclaimer
YAGEO Corporation and its affiliates do not recommend the use of commercial or automotive grade products for high reliability applications or manned space flight.
All product specifications, statements, information and data (collectively, the “Information”) in this datasheet are subject to change. The customer is responsible for
checking and verifying the extent to which the Information contained in this publication is applicable to an order at the time the order is placed. All Information given
herein is believed to be accurate and reliable, but it is presented without guarantee, warranty, or responsibility of any kind, expressed or implied.
Statements of suitability for certain applications are based on KEMET Electronics Corporation’s (“KEMET”) knowledge of typical operating conditions for such
applications, but are not intended to constitute – and KEMET specifically disclaims – any warranty concerning suitability for a specific customer application or use.
The Information is intended for use only by customers who have the requisite experience and capability to determine the correct products for their application. Any
technical advice inferred from this Information or otherwise provided by KEMET with reference to the use of KEMET’s products is given gratis, and KEMET assumes
no obligation or liability for the advice given or results obtained.
Although KEMET designs and manufactures its products to the most stringent quality and safety standards, given the current state of the art, isolated component
failures may still occur. Accordingly, customer applications which require a high degree of reliability or safety should employ suitable designs or other safeguards
(such as installation of protective circuitry or redundancies) in order to ensure that the failure of an electrical component does not result in a risk of personal injury
or property damage.
Although all product–related warnings, cautions and notes must be observed, the customer should not assume that all safety measures are indicated or that other
measures may not be required.
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shipment. If for any reason, the products are removed from pallets by the shipping party and shipped to the end customer, then additional external protection is
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with filling material, and afterwards sealing the box. If this packing and packaging guideline is not followed by the shipping party, the shipping party, and not KEMET,
will be held responsible for any packaging, packing and/or product damages upon delivery of the products to the end customer. KEMET hereby disclaims any liability
for damages to the products or otherwise that have been, or threaten to be, inflicted, result from or are in any way related to the packaging, packing or damage by the
shipping party in contravention of the packing and packaging guidelines herein.
KEMET is a registered trademark of KEMET Electronics Corporation.
© KEMET Electronics Corporation • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4041_MS_MD • 8/8/2023
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