Motor Starting and other intermittent AC applications
Proudly Made In U.S.A.
The MS motor start aluminum electrolytic capacitor is used to provide the torque necessary to start AC motors and can be used in other intermittent
AC applications. The capacitor comes in all popular styles with a variety of terminal configuration choices. Mallory Motor Start Capacitors are
designed in accordance with EIA-463-B. The metal case units are covered with a plastic sleeve (PVC) to provide electrical insulation.
4411 South High School Road
Indianapolis,IN 46241
Phone: (317) 612-1000
(800) 625-4369
Fax: (317) 612-1010
Mal
lo
AC
Capacito
ry
LC
rL
®
IS
O9
0
002
A124
MALLORY AC CAPACITOR LLC
www.mallory-ac.com
Type MS
Case
Code
D
( 0.015)
Standard Terminal Layouts & Resistor Layout
Inches
L
(+0.020, -0.030)
C
(Ref.)
1
/
2
1
/
2
1
/
2
5
/
8
5
/
8
7
/
8
7
/
8
7
/
8
Millimeters
D
( 0.38)
L
(+0.51, -0.76)
C
(Ref.)
1
2
3
4
5
6
7
8
1-
7
/
16
1-
7
/
16
1-
7
/
16
1-
13
/
16
1-
13
/
16
2-
1
/
16
2-
1
/
16
2-
9
/
16
(1.4375)
(1.4375)
(1.4375)
(1.8125)
(1.8125)
(2.0625)
(2.0625)
(2.5625)
2-
3
/
4
3-
3
/
8
4-
3
/
8
3-
3
/
8
4-
3
/
8
3-
3
/
8
4-
3
/
8
4-
3
/
8
(2.750)
(3.375)
(4.375)
(3.375)
(4.375)
(3.375)
(4.375)
(4.375)
(.500)
(.500)
(.500)
(.625)
(.625)
(.875)
(.875)
(.875)
36.51
36.51
36.51
46.04
46.04
52.39
52.39
65.09
69.85
85.73
111.13
85.73
111.13
85.73
111.13
111.13
12.70
12.70
12.70
15.88
15.88
22.23
22.23
22.23
Solder Lug Terminals
(SL)
(All Cases)
.125
(Ref)
C
Single Disconnect Terminals
(SQC)
(All Cases)
C
Standard
Dual Disconnect Terminals
(DQC)
(All Cases)
C
Dual Disconnect Terminals
W/Solder Lug Terminal
(DQCS)
(Case 4, 5, 6, 7 & 8 only)
C
L
.0625
(Ref)
.0625
(Ref)
.0625
(Ref)
D
Mounting Accessories
HB Brackets
EIA
Case Code
Dimensions (Ref.)
PL and PLA End Caps
Catalog Number
A
3-
3
/
8
"
4-
1
/
64
"
5-
1
/
64
"
B
1-
11
/
64
"
1-
13
/
16
"
2-
23
/
32
"
C*
7
/ "
8
1
/ "
1-
2
1-
25
/
32
"
D
1.258
1-
37
/
64
"
2-
5
/
64
"
Wire Hole
Toward Bracket
Wire Hole
Away From Bracket
EIA
Case Code
A
Dimension
HB2
HB4
HB8
1
2-4-6
3-5-7-8
PL3
PL6
PL8
PL10
PLA3
PLA6
PLA8
PLA10
1-2-3
4-5
6-7
8
1-
7
/
16
"
1-
13
/
16
"
2-
1
/
16
"
2-
9
/
16
"
Material: .042 spring steel
with black parkerized finish.
.3125 R
.2188 R
* Center-to-center dimension.
.375
PL
A
.9375 Space
D
.191 R
.750
1.375
*C
.094
.375
PLA
B
A
.230
.234
A
.875
1.1875
HB brackets are used with PL or PLA end caps. The bracket is assembled to the motor or any suitable surface by two screws in line at any convenient position within
the center-to-center dimension (C) shown in the chart. The PL end cap is placed in position and the entire assemby snapped into place with the connecting wires
brought through the bracket hole. Use PLA style caps if the wire is to be direced away from the bracket. (Example: PLA3).
End caps and brackets are shipped loose and should be ordered separately.
Contact the factory for information about wire leads and sub-assemblies.
2
Mallory AC Capacitor LLC - 4411 South High School Road - Indianapolis IN 46241 - Phone: (317)612-1000 - Fax: (317)612-1010 - www.mallory-ac.com
Ratings Charts
MSA - Type 2 Standard Duty Ratings
Highlighted case sizes per EIA-463-B
Other case sizes listed are available from Mallory
and also meet EIA-463-B Type 2 test specifications.
MFD
21-25
25-30
30-36
36-43
43-52
47-56
53-64
64-77
72-87
88-106
108-130
124-149
130-156
145-174
161-193
189-227
216-260
233-280
243-292
270-324
324-389
340-408
378-455
400-480
430-516
460-552
540-648
590-708
645-774
708-850
720-864
800-960
815-978
829-995
850-1020
1000-1200
1020-1224
1175-1410
1280-1536
1326-1590
110 Vac
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1 or
2
1 or
2
1 or
2
1 or
2
1 thru
3
1 thru
4
2 thru
4
2 thru
4
2 thru
4
2 thru
4
4 or
5
4 or
5
4 thru
7
4 thru
7
4 thru
7
4 thru
7
4 thru
7
4 thru
8
4 thru
8
5 thru
8
5 thru
8
5 thru
8
5 thru
8
7
125 Vac
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1or
2
1 or
2
1 or
2
1 thru
3
1 thru
3
2 thru
4
2 thru
4
2 thru
4
2 thru
4
2 thru
4
2 thru
4
4 or
5
4 or
5
4 thru
7
4 thru
7
4 thru
7
4 thru
7
4 thru
8
5 thru
8
5 thru
8
5 thru
8
5 thru 8
5 thru 8
7
7
165 Vac
1
1
1
1
1
1
1
1
1
1 or
2
1 or
2
1 or
2
2 thru
4
2 thru
4
2 thru
4
2 thru
4
2 thru
4
2 thru
5
2 thru
5
2 thru
5
4 thru
7
4 thru
7
4 thru
7
4 thru
7
4 thru
8
4 thru
8
4 thru
8
5 thru
8
5 thru
8
5 thru
8
5 thru
8
7 or
8
7 or
8
7 or
8
7 or
8
7 or
8
7
220 Vac
1
1
1
1
1 or
2
1 or
2
1 or
2
1 thru
4
1 thru
4
1 thru
4
1 thru
4
2 thru
5
2 thru
5
2 thru
7
4 thru
7
4 thru
7
4 thru
8
4 thru
8
4 thru
8
4 thru
8
7 or
8
7 or
8
7 or
8
7 or
8
8
8
8
8
8
250 Vac
1
1
1 or
2
1 or
2
1 or
2
1 or
2
1 thru
4
1 thru
4
1 thru
4
2 thru
5
4 or
5
4 or
5
4 or
5
4 thru
7
4 thru
7
4 thru
8
5 thru
8
5 thru
8
5 thru
8
5 thru
8
7 or
8
7 or
8
7 or
8
7 or
8
8
8
8
8
330 Vac
1 or
2
1 or
2
1 thru
4
1 thru
4
2 thru
4
2 thru
4
3 thru
5
4 or
5
4 or
5
4 thru
7
4 thru
8
4 thru
8
5 thru
8
5 thru
8
5 thru
8
7 or
8
7 or
8
7 or
8
7 or
8
7 or
8
8
8
8
8
8
8
MSB - Type 1 Heavy Duty Ratings
EIA-463-B does not specify case sizes for Type 1
Case sizes listed are available from Mallory
and also meet EIA-463-B Type 1 test specifications.
MFD
MFD
110 Vac 115 Vac 125 Vac Vac Vac 220 Vac250 Vac
250 Vac 330 Vac
330 Vac
110 Vac
125 Vac
165 165
220 Vac
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
or
or
or
or
or
or
4
4
5
or
or
or
5
7
7
7
7
7
7
8
8
8
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
2
2
or
or
or
4
4
4
5
or
or
or
or
7
7
7
7
7
7
8
8
8
1
1
1
1
1
1
1
1
1
1
1
1
1
2
2
3 or 4
3 or 4
3 or 4
3 or 4
3 or 4
4 or 5
4 or 5
5 thru 7
5 thru 7
5 thru 7
5 thru 7
5 thru 7
7
7
7
7
8
8
8
8
8
8
8
8
1
1
1
1
1
1
1 or 2
4
4
4
4
5
5
5 thru 7
5 thru 7
7 or 8
7
7
8
8
8
8
8
8
8
8
1
1
1
2
2
2
3 or 4
4
4
4 or 5
5
5
5
5
7
7
7
8
8
8
8
8
8
8
8
1
1 or 2
2
2
4
4
4
4
4 or 5
5
5
5
6
7
8
8
8
8
8
8
21-25
25-30
30-36
36-43
43-52
47-56
53-64
64-77
72-87
88-106
108-130
124-149
130-156
145-174
161-193
189-227
216-260
233-280
243-292
270-324
324-389
340-408
378-455
400-480
430-516
460-552
540-648
590-708
645-774
708-850
720-864
800-960
815-978
829-995
850-1020
1000-1200
1020-1224
1175-1410
1280-1536
1326-1590
2
2
3
3
3
3
3
3
4
4
4
4
3
3
3
4
4
4
5
5
5
6
6
6
5
6
6
6
6
7
7
7
Part Number Nomenclature
Standard Part Number
Mallory Type Designation
Identifies the basic capacitor design;
MS
A
1
R
10
161
N
Performance
A = EIA Type 2
B = EIA Type 1
S = Special
Case Code
(See standard ratings page)
Case Type
R = Recessed (Standard).
Voltage Rating
10 = 110
22 = 220
12 = 125
25 = 250
16 = 165
33 = 330
Minimum Capacitance
Expressed in microfarads.
Always 3 or 4 digits.
Resistor
N = No resistor (Standard)
R = With Resistor (15k , 2 Watt is standard)
Mallory AC Capacitor LLC - 4411 South High School Road - Indianapolis IN 46241 - Phone: (317)612-1000 - Fax: (317)612-1010 - www.mallory-ac.com
3
Metal Case AC Motor Start Capacitors
Maximum Capacitance for Aluminum Case Designs
per EIA ratings Type 2
Case Code
A1
A2
A3
B2
B3
C2
C3
C4
D2
D3
D4
E3
E4
D x L
(mm)
25 x 45
25 x 61
25 x 75
30 x 61
30 x 75
35 x 61
35 x 75
35 x 101
40 x 61
40 x 75
40 x 101
45 x 75
45 x 101
C
(mm)
10.16
10.16
10.16
10.16
10.16
12.7
12.7
12.7
15.9
15.9
15.9
15.9
15.9
110 Vac
161
243
324
324
460
460
645
850
590
850
1280
1020
1500
125 Vac
145
189
270
270
400
430
590
850
590
829
1175
1020
1410
165 Vac
108
130
189
189
270
270
378
540
400
540
800
645
1000
108
108
161
161
233
324
216
270
430
378
540
72
108
161
124
161
243
216
270
53
72
108
88
108
161
145
189
220 Vac
250 Vac
330 Vac
Insulation hi-pot test is 2000 Vac between metal case and metal foil
wrapped around sleeve for 1 second.
L
2.0
7.7mm Max.
7.7mm Max.
C
0.5
D
1.0
C 0.5
Solder Lug Terminals
(SL)
(25,30mm Cases)
Standard Dual Disconnect Terminals
(DQC)
(35,40,45mm Cases)
Note: Add 1.0mm maximum to diameter and 1.0mm
maximum to length for PVC insulation sleeve.
Metal Case Part Number Nomenclature
Standard Part Number
Mallory Type Designation
Performance
L = EIA Type II
(Standard)
M = EIA Type I
(Special)
Contact Mallory for size information.
G = Extended Run (Special)
Minimum Capacitance
Expressed in Microfarad
Always in 3 or 4 Digits
Tolerance
D = -0 + 20%
Voltage Rating
3 Digits
Case Code
(See Table)
Resistor
N = No resistor (Standard)
R = With Resistor (15k , 2 Watt is standard)
Sleeve
3 = Blue PVC
MS
L
189
D
110
A2
N
3
4
Mallory AC Capacitor LLC - 4411 South High School Road - Indianapolis IN 46241 - Phone: (317)612-1000 - Fax: (317)612-1010 - www.mallory-ac.com
Application Guide for Plastic and Metal Case
Figure A: Type 2 (MSA)
Rated
Voltage Test
Volts AC (rms)
Capacitance Rating
(mfd)
From
To
Duty Cycle
Secs.
(On)
3
/
4
Figure B: Type 1 (MSB)
t
Duration of test
(no. of starts)
Rated
Voltage Test
Volts AC (rms)
Capacitance Rating
(mfd)
From
To
Duty Cycle
Secs.
(On)
3
/
4
3
/
4
3
/
4
3
/
4
3
/
4
3
/
4
3
/
4
3
/
4
3
/
4
3
/
4
3
/
4
3
/
4
Secs.
(Off)
Secs.
(Off)
{
Duration of test
(no. of starts)
110
125
165
220
250
330
21-25
130-156
270-324
400-480
590-708
1000-1200
21-25
108-130
161-193
243-292
400-480
645-774
21-25
108-130
130-156
233-280
378-454
21-25
37-56
88-106
161-193
270-324
21-25
36-43
72-86
108-130
216-259
21-25
25-30
36-43
72-86
108-130
124-149
243-292
378-454
540-648
850-1020
1326-1590
88-106
145-174
233-280
378-454
590-708
1326-1890
88-106
124-149
216-259
340-408
850-1020
43-52
72-86
145-174
243-292
460-552
30-36
64-77
88-106
189-227
430-516
21-25
30-36
64-77
88-106
270-324
1
1
1
1
1
3
/
4
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
29
1
/
4
59
89
119
179
239
29
1
/
4
59
89
119
179
239
59
89
119
179
239
59
89
119
179
239
59
89
119
179
239
59
89
119
179
239
50,000
50,000
33,500
25,000
16,500
12,500
50,000
50,000
33,500
25,000
16,500
12,500
33,500
33,500
25,000
16,500
12,500
33,500
33,500
25,000
16,500
12,500
33,500
33,500
25,000
16,500
12,500
33,500
33,500
25,000
16,500
12,500
{
110
125
165
220
250
330
21-25
130-156
270-324
400-480
590-708
1000-1200
21-25
108-130
161-193
243-292
400-480
645-774
21-25
108-130
130-156
233-280
378-454
21-25
37-56
88-106
161-193
270-324
21-25
36-43
72-86
108-130
216-259
21-25
25-30
36-43
72-86
108-130
124-149
243-292
378-454
540-648
850-1020
1326-1590
88-106
145-174
233-280
378-454
590-708
1326-1890
88-106
124-149
216-259
340-408
850-1020
43-52
72-86
145-174
243-292
460-552
30-36
64-77
88-106
189-227
430-516
21-25
30-36
64-77
88-106
270-324
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
29
1
/
4
29
1
/
4
29
1
/
4
29
1
/
4
29
1
/
4
29
1
/
4
29
1
/
4
29
1
/
4
29
1
/
4
29
1
/
4
29
1
/
4
29
1
/
4
59
59
59
59
59
59
59
89
89
89
59
59
89
89
119
59
59
59
89
119
75,000
75,000
75,000
75,000
75,000
75,000
75,000
75,000
75,000
75,000
75,000
75,000
40,000
40,000
40,000
40,000
40,000
40,000
40,000
33,500
33,500
33,500
40,000
40,000
33,500
33,500
25,000
40,000
40,000
40,000
33,500
25,000
t
The number of starts shown are reduced starts for accelerated
testing so that test time does not exceed 35 days. Type 2 capaci-
tors should be capable of 50,000 starts for ratings to 125 volts
and 40,000 starts for higher voltages. See section 3.0 for testing
procedures.
The number of starts shown are reduced starts for accelerated
testing so that test time does not exceed 35 days. Type 1 capaci-
tors should be capable of 75,000 starts for ratings to 125 volts
and 40,000 starts for higher voltages. See section 3.0 for testing
procedures.
If an application exceeds the duty cycles in Figure B, other meth-
ods of capacitor selection must be used, Contact Mallory for
assistance.
1.1 VOLTAGE RATING
The rated voltage of the capacitor must be greater than or equal
to the average voltage across the capacitor terminals during the
motor starting cycle. This is not necessarily the same as the mo-
tor line voltage. In addition, the cutoff voltage rating of the ca-
pacitor must be greater than or equal to the maximum voltage
attained across the terminals of the capacitor in actual service.
The maximum recommended cut-off voltages for the seven stan-
dard voltage ratings are as follows:
Rated
Maximum
Voltage (rms) Cut-Off Voltage (rms)
110
140
125
160
165
210
220
280
250
300
330
400
These ratings are based on the maximum capacitor temperature
of 65gC.
1.2 CAPACITANCE RATING
The capacitance is chosen to give the necessary starting torque
to the motor. The minimum capacitance value is the minimum
designed capacitance. The maximum capacitance is 20% more
than that value.
1.3 DUTY CYCLE
The duty cycle should be calculated for each application. It is the
ratio of the time the capacitor is on voltage to the total time of one
cycle. The duty cycles for the normal performance of Type 2
(MSA) capacitors are listed in Figure A. Mallory Type MSA
capacitors may be used in any intermittant application within their
temperature and voltage range where the duty cycle does not ex-
ceed that listed in the table in Figure A. This is in accordance
with the standards in EIA-463-B for Type 2 capacitors.
If a particular application exceeds the normal duty cycle, but does
not exceed the values listed in Figure B, an extra performance or
Type 1 (MSB) capacitor is required.
(Continued)
Mallory AC Capacitor LLC - 4411 South High School Road - Indianapolis IN 46241 - Phone: (317)612-1000 - Fax: (317)612-1010 - www.mallory-ac.com
How can I use IDE (IAR Workbench) to view the data written into FLASH? Also, which expert can give me a standard routine for reading and writing Flash?...
Introduction: When used in conjunction with an amplifier with sufficiently high AC performance, the R-2R architecture of a multiplying digital-to-analog converter (DAC) is well suited for low noise, l...
Dear experts:I am currently working on the design of a laser digital control constant current source based on a single chip microcomputer. Can anyone help me?...
[url=https://www.eeworld.com.cn/Vishay/2013/1122/down_960.html]https://www.eeworld.com.cn/Vishay/2013/1122/down_960.html[/url] A very practical website where you can learn practical methods of DC opto...
With the booming electronics industry, vision systems have become a leader in the electronics automation sector. However, the delicate nature of electronic products often affects product yields due...[Details]
On August 24th, media outlets reported, citing sources, that NavInfo, a listed company on the A-share market, is nearing completion in its acquisition of the intelligent driving c...[Details]
The most significant feature of IPS panels is that both electrodes are located on the same surface, unlike other LCD panels, which have electrodes arranged on top and bottom surfaces in a three-dim...[Details]
Introduction to the principles of speech recognition technology
Automatic speech recognition (ASR) technology aims to enable computers to understand human speech and extract the textual inform...[Details]
Zos Automotive Research Institute released the "2025
Smart Cockpit
Tier 1 Research Report (Domestic Edition)."
This report analyzes the operating conditions of more than a dozen ...[Details]
Have you ever heard stories about "crazy appliances"? Think of microwaves that turn on automatically or ovens that preheat without any human input? With radios and electromagnetic interfaces ubiqui...[Details]
Electric vehicles are becoming increasingly popular, with increasingly longer ranges. There are two ways to charge electric vehicles: slow charging and fast charging. Which is the most suitable? Sl...[Details]
One of the most core components of electric vehicles is the motor. The power supply provides electrical energy to the motor, which converts this electrical energy into mechanical energy, which in t...[Details]
Reflow soldering is one of the most commonly used methods in electronics manufacturing, allowing for the soldering of large numbers of components in a relatively short time. However, any experience...[Details]
China, August 21, 2025 – STMicroelectronics (NYSE: STM), a world-leading semiconductor company serving a wide range of electronics applications, has published its IFRS 2025 semi-annual financial re...[Details]
We often hear about the precautions for using pure electric vehicles in winter, and many owners even develop relevant strategies, such as adopting a "charge as you go" principle for their vehicles,...[Details]
Electric vehicles are composed of three main components: electric motors, electric motors, and electric vehicles. Maintenance is much simpler than for gasoline-powered vehicles. Maintenance for ele...[Details]
Common Mode Semiconductor has officially launched the GM6503 series—a 5 V, 3 A synchronous step-down DC/DC power module designed for optical communications, servers, industrial applications, and FP...[Details]
Consumer demand for premium listening experiences has driven rapid evolution in the wireless headphone market in recent years. Hybrid designs, which utilize two drivers per earbud to enhance sound ...[Details]
"I want to ask why there are so many manufacturers making mobile phone CPUs, but only Intel and AMD make computer CPUs?"
The progress of domestic PC CPU production has disappointed many ...[Details]
Creative Market
京公网安备 11010802033920号
EEWORLD
