Press-Fit Aluminum Electrolytic Capacitors
ALF40, +105°C
Overview
Applications
The KEMET ALF40 press-fit capacitors eliminate the
need for solder, the associated production and quality
issues. They are the next evolution of snap-in capacitors,
providing reliable electrical contact and the same vibration
performance as soldered snap-in terminals. These
capacitors cover a wide range of case sizes and voltage
ratings. The ALF40 offers high voltages up to 500 VDC,
high ripple currents, good surge voltage capability, and a
very long life performance. Rated operating temperature
is 105°C.
The ALF40 press-fit capacitors are suited for high
reliability and long life applications, such as frequency
converters, solar inverters, advanced energy storage
systems, and switch mode power supplies (SMPS). The
extended temperature range allows increased ripple
currents at lower temperatures.
Benefits
• Eliminates the manufacturing problems of soldering onto
thick PCB copper tracks, which act as heat-sinks
• Eliminates fractured solder joints/cold-solder
• Skipping the solder operation allows for easy insertion
after the production washing process
• Capability to exchange components in the field
In addition to solving the solder issues, the ALF40 press-fit
offers:
• Compact size
• Long life, up to 9,000 hours at +105°C (VR , IR applied)
• High ripple current
• High voltage up to 500 V
• Excellent surge voltage capability
• 35, 40, 45, and 50 mm diameters with 4 or 5 pin
configuration
• Optimized designs available upon request
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Part Number System
ALF40
C
822
EF
025
Series
Termination
Capacitance Code (µF)
Size Code
Rated Voltage (VDC)
Press-Fit
Aluminum
Electrolytic
See Termination Table
First two digits
represent significant
figures. Third digit
specifies number of
zeros.
See Dimension Table
025 = 25
040 = 40
063 = 63
100 = 100
200 = 200
250 = 250
350 = 350
400 = 400
500 = 500
Built Into Tomorrow
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4078_ALF40 • 1/18/2021
1
Press-Fit Aluminum Electrolytic Capacitors – ALF40, +105°C
Performance Characteristics
Item
Performance Characteristics
Capacitance Range
120 – 120,000 µF
Rated Voltage
25 – 500 VDC
Operating Temperature
−40 to +105°C
Storage Temperature Range
−55 to +105°C
Capacitance Tolerance
±20% at 100 Hz/+20°C
Operational Lifetime
End of Life Requirement
Shelf Life
Leakage Current
D (mm)
Rated Voltage and Ripple
Current at +105°C (hours)
Rated Voltage at +105°C
(hours)
35
8,000
13,000
40 – 50
9,000
14,000
∆ C/C < ±10%, ESR < 2 x initial ESR value, IL < initial specified limit
2,000 hours at +85°C or 30,000 hours at +40°C 0 VDC
I = 0.003 CV or 6,000 µA (whichever is smaller)
C = rated capacitance (µF), V = rated voltage (VDC). Voltage applied for 5 minutes at +20°C.
Procedure
D ≤ 40 mm
0.75 mm displacement amplitude
or 10 G maximum acceleration.
Vibration applied for three
2-hour sessions at 10 – 500 Hz
(Capacitor clamped by body).
D > 40 mm
0.35 mm displacement amplitude
or 5 G maximum acceleration.
Vibration applied for three
0.5-hour sessions at 10 – 55 Hz
(Capacitor clamped by body).
Vibration Test Specifications
Standards
Requirements
No leakage of electrolyte
or other visible damage.
Deviations in capacitance from
initial measurements must not
exceed: Δ C/C < 5%
IEC 60384–4 long life grade 40/105/56
Surge Voltage
Condition
≤ 30 second surge followed by a no
load period of 330 seconds, 1,000
cycles at +85°C
Voltage (VDC)
25
40
63
100
200
250
350
400
450
500
28.75
46
72.5
115
230
288
385
440
495
550
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4078_ALF40 • 1/18/2021
2
Press-Fit Aluminum Electrolytic Capacitors – ALF40, +105°C
Test Method & Performance
Endurance Life Test
Conditions
Performance
Temperature
+105°C
Test Duration
5,000 hours
Ripple Current
Voltage
Performance
Rated ripple current in specified table
The sum of DC voltage and the peak AC voltage must not exceed the rated voltage of the capacitor
The following specifications will be satisfied when the capacitor is tested at +20°C:
Capacitance Change
Equivalent Series Resistance
Leakage Current
≤ 160 V
Within 15% of the initial value
> 160 V
Within 10% of the initial value
Does not exceed 200% of the initial value
Does not exceed leakage current limit
Dimensions – Millimeters
Size Code
DB
DC
DD
DE
DF
DG
DH
DL
EB
EC
ED
EE
EF
EG
EH
EL
EP
FB
FC
FD
FE
FF
Dimensions in mm
D
L
−0/+1
±2
Approximate
Weight
Grams
35
35
35
35
35
35
35
35
40
40
40
40
40
40
40
40
40
45
45
45
45
45
30
35
40
45
50
55
60
80
30
35
40
45
50
55
60
80
105
30
35
40
45
50
42
50
55
65
70
75
80
105
49
57
65
80
82
95
98
131
170
62
72
82
92
103
Size Code
FG
FH
FL
FP
KB
KC
KD
KE
KF
KG
KH
KL
KP
KC
KD
KE
KF
KG
KH
KL
KP
Dimensions in mm
D
L
−0/+1
±2
Approximate
Weight
Grams
45
45
45
45
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
55
60
80
105
30
35
40
45
50
55
60
80
105
35
40
45
50
55
60
80
105
113
123
164
215
75
88
100
113
126
138
151
201
264
88
100
113
126
138
151
201
264
Note: Dimensions include sleeving
Note: Dimensions include sleeving
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4078_ALF40 • 1/18/2021
3
Press-Fit Aluminum Electrolytic Capacitors – ALF40, +105°C
Termination Tables
Termination Code
Diameter (mm)
C
(4 Pin)
LL = 5.5 ±1
G
(5 Pin)
LL = 5.5 ±1
•
•
•
•
•
•
•
35
40
45
50
Dimensions in mm
Mounting: These capacitors are designed to be mounted by their terminals alone and may be used
in any position. The dummy pins must be isolated.
SIDE VIEW
TERMINAL END VIEW
L
PCB LAYOUT
Mounting Dimensions
LL
60°
22.5 ±0.1
60°
D
2 ±1
Style G
Ø1.486
Polarity Stripe
SIDE VIEW
TERMINAL END VIEW
L
PCB LAYOUT
Ø1.486
LL
Polarity
Stripe
30°
D
30°
25 ±0.1
Style C
2 ±1
PCB Thickness: 1.57 mm Minimum
DRILL
Ø1.613 ±0.025
COPPER
THICKNESS
0.025 minimum
FINAL PLATED
THROUGH-HOLE
DIAMETER
Ø1.486 ±0.076
Pin Insertion Force: 125 N (28 lbf) maximum
Pin Retention Force: 62 N (14 lbf) minimum
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
(Final Plated Through-Hole)
Ø1.486
0.30
Ø1.613
(Drill Hole)
A4078_ALF40 • 1/18/2021
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Press-Fit Aluminum Electrolytic Capacitors – ALF40, +105°C
Shelf Life
The capacitance, ESR and impedance of a capacitor will not change significantly after extended storage periods, however,
the leakage current will very slowly increase. KEMET products are particularly stable and allow a shelf life in excess of three
years at 40°C. See sectional specification under each product for specific data.
Re-Age (Reforming) Procedure
Apply the rated voltage to the capacitor at room temperature for a period of one hour, or until the leakage current has fallen
to a steady value below the specified limit. During re-aging, a maximum charging current of twice the specified leakage
current or 5 mA (whichever is greater) is suggested.
Reliability
The reliability of a component can be defined as the probability that it will perform satisfactorily under a given set of
conditions for a given length of time.
In practice, it is impossible to predict with absolute certainty how any individual component will perform. Therefore, we
must utilize probability theory. It is also necessary to clearly define the level of stress involved (e.g., operating voltage, ripple
current, temperature and time.) Finally, the meaning of satisfactory performance must be defined by specifying a set of
conditions which determine the end of life of the component.
Reliability as a function of time, R(t), is normally expressed as: R(t) = e–λt, where R(t) is the probability that the component
will perform satisfactorily for time t, and λ is the failure rate.
Failure Rate
The failure rate is the number of components failing per unit of time. The failure rate of most electronic components follows
the characteristic pattern:
• Early failures are removed during the manufacturing process.
• The operational life is characterized by a constant failure rate.
• The wear out period is characterized by a rapidly increasing failure rate.
The failures in time (FIT) are given with a 60% confidence level for the various type codes. By convention, FIT is expressed as
1 x 10−9 failures per hour. Failure rate is also expressed as a percentage of failures per 1,000 hours, e.g., 100 FIT = 1 x 10−7
failures per hour = 0.01%/1,000 hours.
End of Life Definition
Catastrophic Failure: short circuit, open circuit or safety vent operation
Parametric Failure:
• Change in capacitance > ±10%
• Leakage current > specified limit
• ESR > 2 x initial ESR value
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4078_ALF40 • 1/18/2021
5
Press-Fit Aluminum Electrolytic Capacitors – ALF40, +105°C
MEAN TIME BETWEEN FAILURES
The mean time between failures (MTBF) is simply the inverse of the failure rate.
MTBF = 1/λ
Failure Rate
early failures
wear out
operational life
Time
The failure rate is derived from our periodic test results. The failure rate (λR) is, therefore, only given at test temperature for
life tests. An estimation is also given at 40°C. The expected failure rate for this capacitor range is based on our periodic test
results for capacitors with structural similarity. Failure rate is frequently quoted in failure in time (FIT), where 1 FIT = 1 x 10-9
failures per hour. Failure rate per hour includes both catastrophic and parametric failures.
Failure Rate per Hour
Ta
85°C 220 FIT
40°C 10 FIT
Environmental Compliance
All Part Numbers in this datasheet are Reach and RoHS compliant.
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 • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4078_ALF40 • 1/18/2021
6
Press-Fit Aluminum Electrolytic Capacitors – ALF40, +105°C
Table 1 – Ratings & Part Number Reference
VDC
25
25
25
25
25
25
25
25
25
25
25
40
40
40
40
40
40
40
40
40
40
63
63
63
63
63
63
63
63
63
63
63
100
100
100
100
100
100
100
100
100
100
100
200
200
200
200
200
200
200
200
200
200
200
200
200
250
250
250
VDC
Rated
Capacitance
100 Hz
20°C (µF)
22000
27000
27000
33000
33000
39000
39000
47000
56000
82000
120000
12000
12000
15000
15000
18000
18000
22000
27000
47000
68000
5600
6800
6800
8200
8200
10000
10000
12000
15000
22000
33000
2200
2200
2700
2700
3300
3300
3900
4700
5600
8200
10000
680
820
820
1000
1000
1200
1200
1500
1800
2700
3900
5600
6800
470
560
560
Rated
Capacitance
Size
Code
Case
Size
D x L (mm)
DC
DD
EB
DF
EC
DF
ED
EF
EG
EL
EP
DC
EB
DD
ED
DF
EE
EF
EG
EL
EP
EB
DC
EC
DD
ED
DF
EE
EF
EH
EL
EP
DC
EB
DD
ED
DF
EE
EF
EG
EH
EL
EP
EB
DC
EC
DD
ED
DF
EE
EF
EH
EL
EP
FP
KP
EB
DC
EC
35 x 35
35 x 40
40 x 30
35 x 50
40 x 35
35 x 50
40 x 40
40 x 50
40 x 55
40 x 80
40 x 105
35 x 35
40 x 30
35 x 40
40 x 40
35 x 50
40 x 45
40 x 50
40 x 55
40 x 80
40 x 105
40 x 30
35 x 35
40 x 35
35 x 40
40 x 40
35 x 50
40 x 45
40 x 50
40 x 60
40 x 80
40 x 105
35 x 35
40 x 30
35 x 40
40 x 40
35 x 50
40 x 45
40 x 50
40 x 55
40 x 60
40 x 80
40 x 105
40 x 30
35 x 35
40 x 35
35 x 40
40 x 40
35 x 50
40 x 45
40 x 50
40 x 60
40 x 80
40 x 105
45 x 105
50 x 105
40 x 30
35 x 35
40 x 35
Size Code
Case Size
Ripple Current
100 Hz
105°C (A)
2.91
3.34
4.03
4.32
4.83
4.32
5.57
7.3
7.51
11.06
13.41
2.77
4.13
3.18
5.66
4.12
6.46
7.34
7.5
10.42
12.71
3.82
2.5
4.18
2.87
5.01
3.71
5.69
6.5
7.81
9.7
12.01
2.1
3.58
2.41
4.92
3.12
5.59
6.41
6.67
7.46
9.28
11.33
2.97
1.7
3.35
1.95
3.92
2.5
4.5
5.13
6.1
7.62
7.9
8.68
9.08
2.59
1.57
3.05
10 kHz
105°C (A)
3.1
3.56
4.09
4.61
4.9
4.61
5.65
7.4
7.61
11.24
14.05
3.08
4.22
3.53
5.78
4.58
6.6
7.5
7.63
10.59
13.47
3.91
2.9
4.26
3.33
5.12
4.31
5.81
6.64
7.99
9.92
13.01
2.67
3.8
3.07
5.24
3.97
5.95
6.83
7.04
7.87
9.78
13.12
3.67
2.34
4.06
2.69
4.8
3.48
5.5
6.23
7.53
9.32
12.31
12.54
12.29
3.49
2.25
4.16
ESR
Maximum
Impedance
Maximum
100 Hz
20°C (mΩ)
116
96
75
70
66
69
53
41
38
22
18
121
88
100
63
73
53
43
39
23
17
102
141
91
116
72
85
60
50
39
27
18
177
128
146
95
108
78
65
58
49
34
24
202
252
173
208
140
159
116
94
76
52
49
40
36
258
297
221
10 kHz
20°C (mΩ)
104
86
69
63
62
62
49
37
35
20
17
106
79
87
56
64
47
39
35
21
16
90
119
81
99
64
72
53
44
34
24
17
142
110
118
80
86
66
55
50
42
29
21
158
191
137
158
110
119
91
74
60
41
34
28
26
193
217
166
Part Number
SPQ
MOQ
ALF40C223DC025
ALF40C273DD025
ALF40(1)273EB025
ALF40C333DF025
ALF40(1)333EC025
ALF40C393DF025
ALF40(1)393ED025
ALF40(1)473EF025
ALF40(1)563EG025
ALF40(1)823EL025
ALF40(1)124EP025
ALF40C123DC040
ALF40(1)123EB040
ALF40C153DD040
ALF40(1)153ED040
ALF40C183DF040
ALF40(1)183EE040
ALF40(1)223EF040
ALF40(1)273EG040
ALF40(1)473EL040
ALF40(1)683EP040
ALF40(1)562EB063
ALF40C682DC063
ALF40(1)682EC063
ALF40C822DD063
ALF40(1)822ED063
ALF40C103DF063
ALF40(1)103EE063
ALF40(1)123EF063
ALF40(1)153EH063
ALF40(1)223EL063
ALF40(1)333EP063
ALF40C222DC100
ALF40(1)222EB100
ALF40C272DD100
ALF40(1)272ED100
ALF40C332DF100
ALF40(1)332EE100
ALF40(1)392EF100
ALF40(1)472EG100
ALF40(1)562EH100
ALF40(1)822EL100
ALF40(1)103EP100
ALF40(1)681EB200
ALF40C821DC200
ALF40(1)821EC200
ALF40C102DD200
ALF40(1)102ED200
ALF40C122DF200
ALF40(1)122EE200
ALF40(1)152EF200
ALF40(1)182EH200
ALF40(1)272EL200
ALF40(1)392EP200
ALF40(1)562FP200
ALF40(1)682KP200
ALF40(1)471EB250
ALF40C561DC250
ALF40(1)561EC250
100
100
72
100
72
100
72
36
36
36
36
100
72
100
72
100
72
36
36
36
36
72
100
72
100
72
100
72
36
36
36
36
100
72
100
72
100
72
36
36
36
36
36
72
100
72
100
72
100
72
36
36
36
36
30
24
72
100
72
200
200
216
200
216
200
216
216
216
216
216
200
216
200
216
200
216
216
216
216
216
216
200
216
200
216
200
216
216
216
216
216
200
216
200
216
200
216
216
216
216
216
216
216
200
216
200
216
200
216
216
216
216
216
120
96
216
200
216
ESR
Impedance
Part Number
SPQ
MOQ
Ripple Current
(1) Termination code: See Termination Tables for available options.
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4078_ALF40 • 1/18/2021
7
Press-Fit Aluminum Electrolytic Capacitors – ALF40, +105°C
Table 1 – Ratings & Part Number Reference cont.
VDC
250
250
250
250
250
250
250
250
250
250
250
250
350
350
350
350
350
350
350
350
350
350
350
350
350
350
350
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
400
450
450
450
450
450
450
450
450
450
450
450
450
450
450
VDC
Rated
Capacitance
100 Hz
20°C (µF)
680
680
820
820
1000
1000
1200
1500
1800
2700
3900
4700
270
330
390
390
470
470
560
560
560
680
820
1000
1500
2200
2700
220
270
270
330
330
390
390
470
470
470
470
560
680
680
1000
1200
1800
2200
120
150
150
180
180
220
220
270
330
330
330
390
470
470
Rated
Capacitance
Size
Code
Case
Size
D x L (mm)
DD
ED
DF
EE
DH
EF
EG
DL
EL
EP
FP
KP
EB
DC
DD
ED
DF
EE
DF
DH
EF
EH
DL
EL
EP
FP
KP
EB
DC
EC
DD
ED
DF
EE
DE
DF
DH
EF
EG
DL
EH
EL
EP
FP
KP
DC
DD
EB
DF
EC
DF
ED
EF
DF
DH
EG
EH
DH
DL
35 x 40
40 x 40
35 x 50
40 x 45
35 x 60
40 x 50
40 x 55
35 x 80
40 x 80
40 x 105
45 x 105
50 x 105
40 x 30
35 x 35
35 x 40
40 x 40
35 x 50
40 x 45
35 x 50
35 x 60
40 x 50
40 x 60
35 x 80
40 x 80
40 x 105
45 x 105
50 x 105
40 x 30
35 x 35
40 x 35
35 x 40
40 x 40
35 x 50
40 x 45
35 x 45
35 x 50
35 x 60
40 x 50
40 x 55
35 x 80
40 x 60
40 x 80
40 x 105
45 x 105
50 x 105
35 x 35
35 x 40
40 x 30
35 x 50
40 x 35
35 x 50
40 x 40
40 x 50
35 x 50
35 x 60
40 x 55
40 x 60
35 X 60
35 x 80
Size Code
Case Size
Ripple Current
100 Hz
105°C (A)
1.8
3.49
3.12
4.01
3.61
4.58
4.93
4.43
6.77
7.05
7.9
8.36
1.97
1.79
2.02
2.64
2.72
3
2.57
3.11
3.41
3.99
3.82
5
6
6.79
7.34
1.88
1.73
2.21
1.98
2.56
2.64
2.88
2.5
2.51
3.04
3.28
3.62
3.72
4.08
4.85
5.76
6.48
7.02
1.36
1.57
1.73
1.88
2.01
2.28
2.34
2.8
2.53
2.91
3.14
3.5
3
3.51
10 kHz
105°C (A)
2.59
4.76
4.66
5.46
5.78
6.22
6.51
6.88
9.27
12.03
12.43
12.3
4.36
3.24
3.67
5.73
4.9
6.46
4.44
5.7
7.27
8.39
6.72
9.98
11.47
12.06
12.08
4.36
3.23
4.95
3.64
5.76
4.66
6.48
4.73
4.4
5.78
7.3
7.78
6.69
8.58
10.16
11.46
12.04
12.08
3.11
3.53
4.14
4.27
4.7
4.71
5.47
6.74
5.14
5.53
7.29
8.04
5.82
6.68
ESR
Maximum
Impedance
Maximum
100 Hz
20°C (mΩ)
245
180
190
149
164
123
106
112
67
62
50
44
448
378
317
312
251
258
224
224
216
177
150
120
99
77
66
521
470
430
386
350
323
295
300
277
270
245
209
200
173
118
103
82
70
810
651
642
541
538
449
440
356
206
285
293
249
232
203
10 kHz
20°C (mΩ)
179
134
137
111
125
92
80
90
50
42
33
30
291
260
218
203
170
168
155
155
141
114
102
78
68
53
45
320
322
266
266
216
221
182
192
192
185
151
130
131
107
73
70
55
47
565
454
447
377
374
315
306
248
140
198
204
174
148
138
Part Number
SPQ
MOQ
ALF40C681DD250
ALF40(1)681ED250
ALF40C821DF250
ALF40(1)821EE250
ALF40C102DH250
ALF40(1)102EF250
ALF40(1)122EG250
ALF40C152DL250
ALF40(1)182EL250
ALF40(1)272EP250
ALF40(1)392FP250
ALF40(1)472KP250
ALF40(1)271EB350
ALF40C331DC350
ALF40C391DD350
ALF40(1)391ED350
ALF40C471DF350
ALF40(1)471EE350
ALF40C561DF350
ALF40C561DH350
ALF40(1)561EF350
ALF40(1)681EH350
ALF40C821DL350
ALF40(1)102EL350
ALF40(1)152EP350
ALF40(1)222FP350
ALF40(1)272KP350
ALF40(1)221EB400
ALF40C271DC400
ALF40(1)271EC400
ALF40C331DD400
ALF40(1)331ED400
ALF40C391DF400
ALF40(1)391EE400
ALF40C471DE400
ALF40C471DF400
ALF40C471DH400
ALF40(1)471EF400
ALF40(1)561EG400
ALF40C681DL400
ALF40(1)681EH400
ALF40(1)102EL400
ALF40(1)122EP400
ALF40(1)182FP400
ALF40(1)222KP400
ALF40C121DC450
ALF40C151DD450
ALF40(1)151EB450
ALF40C181DF450
ALF40(1)181EC450
ALF40C221DF450
ALF40(1)221ED450
ALF40(1)271EF450
ALF40C331DF450
ALF40C331DH450
ALF40(1)331EG450
ALF40(1)391EH450
ALF40C471DH450
ALF40C471DL450
100
72
100
72
50
36
36
50
36
36
30
24
72
100
100
72
100
72
100
50
36
36
50
36
36
30
24
72
100
72
100
72
100
72
100
100
50
36
36
50
36
36
36
30
24
100
100
72
100
72
100
72
36
100
50
36
36
50
50
200
216
200
216
200
216
216
200
216
216
120
96
216
200
200
216
200
216
200
200
216
216
200
216
216
120
96
216
200
216
200
216
200
216
200
200
200
216
216
200
216
216
216
120
96
200
200
216
200
216
200
216
216
200
200
216
216
200
200
ESR
Impedance
Part Number
SPQ
MOQ
Ripple Current
(1) Termination code: See Termination Tables for available options.
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4078_ALF40 • 1/18/2021
8
Press-Fit Aluminum Electrolytic Capacitors – ALF40, +105°C
Table 1 – Ratings & Part Number Reference cont.
VDC
450
450
450
450
450
500
500
500
500
500
500
500
500
500
500
500
500
500
500
VDC
Rated
Capacitance
100 Hz
20°C (µF)
560
820
820
1200
1500
150
180
180
220
270
270
330
390
470
470
680
820
1000
1200
Rated
Capacitance
Size
Code
Case
Size
D x L (mm)
EL
EL
EP
FP
KP
DC
DD
EB
EC
DF
ED
DH
EF
DL
EG
EL
EP
FP
KP
40 x 80
40 X 80
40 x 105
45 x 105
50 x 105
35 x 35
35 x 40
40 x 30
40 x 35
35 x 50
40 x 40
35 x 60
40 x 50
35 x 80
40 x 55
40 x 80
40 x 105
45 x 105
50 x 105
Size Code
Case Size
Ripple Current
100 Hz
105°C (A)
4.32
4.3
5.34
5.84
6.44
1.51
1.71
1.77
2.03
2.2
2.32
2.52
2.94
3.14
3.3
4.25
4.71
5.52
6.27
10 kHz
105°C (A)
9.57
10.04
11.05
11.64
11.85
2.88
3.26
3.55
4.09
4.06
4.66
4.62
5.81
5.61
6.42
8.14
8.95
10.08
11
ESR
Maximum
Impedance
Maximum
100 Hz
20°C (mΩ)
175
154
121
105
86
1500
1250
1250
1020
840
830
690
580
480
480
330
280
230
190
10 kHz
20°C (mΩ)
122
98
85
71
59
1210
1010
1010
820
680
670
560
470
390
390
270
220
190
160
ESR
Impedance
Ripple Current
Part Number
SPQ
MOQ
ALF40(1)561EL450
ALF40(1)821EL450
ALF40(1)821EP450
ALF40(1)122FP450
ALF40(1)152KP450
ALF40C151DC500
ALF40C181DD500
ALF40(1)181EB500
ALF40(1)221EC500
ALF40C271DF500
ALF40(1)271ED500
ALF40C331DH500
ALF40(1)391EF500
ALF40C471DL500
ALF40(1)471EG500
ALF40(1)681EL500
ALF40(1)821EP500
ALF40(1)102FP500
ALF40(1)122KP500
36
36
36
30
24
100
100
72
72
100
72
50
36
50
36
36
36
30
24
216
216
216
120
96
200
200
216
216
200
216
200
216
200
216
216
216
120
96
Part Number
SPQ
MOQ
(1) Termination code: See Termination Tables for available options.
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4078_ALF40 • 1/18/2021
9
Press-Fit Aluminum Electrolytic Capacitors – ALF40, +105°C
Mechanical Data
Polarity and Reversed Voltage
Aluminium electrolytic capacitors manufactured for use in DC applications contain an anode foil and a cathode foil. As such,
they are polarized devices and must be connected with the +ve to the anode foil and the -ve to the cathode foil. If this were
to be reversed, then the electrolytic process that took place in forming the oxide layer on the anode would be recreated in
trying to form an oxide layer on the cathode. In forming the cathode foil in this way, heat would be generated and gas given
off within the capacitor, usually leading to catastrophic failure.
The cathode foil already possesses a thin stabilized oxide layer. This thin oxide layer is equivalent to a forming voltage
of approximately 2 V. As a result, the capacitor can withstand a voltage reversal of up to 2 V for short periods. Above this
voltage, the formation process will commence. Aluminium Electrolytic capacitors can also be manufactured for use in
intermittent AC applications by using two anode foils in place of one anode and one cathode.
Mounting Position
The capacitor can be mounted upright or inclined to a horizontal position.
Insulating Resistance
≥ 100 MΩ at 100 VDC across insulating sleeve.
UL recognized sleeving is available for custom parts in this range, upon request (UL No. E358957.)
Voltage Proof
≥ 2,500 VDC across insulating sleeve.
Safety Vent
A safety vent for overpressure is featured on either the base (opposing end to the terminals) or the side of the can. This
appears in the form of a grooved section on the surface of the can, which is a weakened area and designed to relieve buildup of internal pressure due to overstress or catastrophic failure.
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4078_ALF40 • 1/18/2021
10
Press-Fit Aluminum Electrolytic Capacitors – ALF40, +105°C
Marking
KEMET logo
Rated capacitance,
Capacitance tolerance
Polarity stripe (−)
Rated voltage (VDC)
Article Code
Climatic category
Date of manufacture
and batch number
Made in the
European Union
Construction
Detailed Cross Section
Polarity Stripe (−)
Rubber Seal
Termination Pin
Insulating End Disc
Aluminum Can
with Safety Vent
Tab Connection
to Terminal
Wound
Element Tabs
Margin
Aluminum Can
Insulating Sleeve
Insulating
Sleeve
Rubber Seal
Paper Spacer Impregnated
with Electrolyte
(First Layer)
Cathode Aluminum
Foil, Etched
(Second Layer)
Termination Pin (+)
Termination Pin (−)
Paper Spacer Impregnated Anode Aluminum Foil,
Etched, Covered with
with Electrolyte
Aluminum Oxide (Fourth
(Third Layer)
Layer)
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
A4078_ALF40 • 1/18/2021
11
Press-Fit Aluminum Electrolytic Capacitors – ALF40, +105°C
Construction Data
The manufacturing process begins with the anode foil being
electrochemically etched to increase the surface area and then
“formed” to produce the aluminum oxide layer. Both the anode and
cathode foils are then interleaved with absorbent paper and wound
into a cylinder. During the winding process, aluminum tabs are
attached to each foil to provide the electrical contact.
Extended cathode
Anode foil
The deck, complete with terminals, is attached to the tabs and then
folded down to rest on top of the winding. The complete winding
is impregnated with electrolyte before being housed in a suitable
container, usually an aluminum can, and sealed. Throughout the
process, all materials inside the housing must be maintained at the
highest purity and be compatible with the electrolyte.
Each capacitor is aged and tested before being sleeved and packed.
The purpose of aging is to repair any damage in the oxide layer
and thus reduce the leakage current to a very low level. Aging is
normally carried out at the rated temperature of the capacitor and
is accomplished by applying voltage to the device while carefully
controlling the supply current. The process may take several hours to
complete.
Damage to the oxide layer can occur due to variety of reasons:
• Slitting of the anode foil after forming
• Attaching the tabs to the anode foil
• Minor mechanical damage caused during winding
A sample from each batch is taken by the quality department after
completion of the production process. This sample size is controlled
by the use of recognized sampling tables defi ned in BS 6001.
The following tests are applied and may be varied at the request
of the customer. In this case the batch, or special procedure, will
determine the course of action.
Electrical:
• Leakage current
• Capacitance
• ESR
• Impedance
• Tan Delta
Mechanical/Visual:
• Overall dimensions
• Torque test of mounting stud
• Print detail
• Box labels
• Packaging, including packed
quantity
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
Foil tabs
Tissues
Cathode foil
Etching
Forming
Winding
Decking
Impregnation
Assembly
Aging
Testing
Sleeving
Packing
A4078_ALF40 • 1/18/2021
12
Press-Fit Aluminum Electrolytic Capacitors – ALF40, +105°C
KEMET Electronics Corporation Sales Offices
For a complete list of our global sales offi ces, please visit www.kemet.com/sales.
Disclaimer
All product specifi cations, 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 specifi cally disclaims – any warranty concerning suitability for a specifi c 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 indicted or that other
measures may not be required.
KEMET is a registered trademark of KEMET Electronics Corporation.
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
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A4078_ALF40 • 1/18/2021
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