Snap-In Aluminum Electrolytic Capacitors
ALA7D, +85°C
Overview
Applications
The KEMET ALA snap-in capacitors are designed for
automotive applications. They can withstand vibration up to
20 G in accordance with the demanding requirements of the
Automotive Electronics Council's AEC–Q200 qualification.
The ALA7D capacitance values cover a range from 240 to
820 µF and voltage ranges of 400 to 600 V.
Typical applications for ALA7D capacitors are mainly in the
field of e-mobility, such as on-board chargers, inverters, or
wall boxes.
Benefits
• Designed for automotive usage
• Vibration proof 20 g
• AEC–Q200
• Long life, up to 15,000 hours at +85°C (Vr Ir applied)
• High ripple current
• High voltage
• Excellent surge voltage capability
• PET sleeve recognized to UL: QMTR2, UL No. E358957
(Other options available upon request)
• Optimized designs available upon request
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Part Number System
ALA7D
A
391
DC
450
Series
Termination
Capacitance Code (µF)
Size Code
Rated Voltage (VDC)
Snap-In Aluminum
Electrolytic
See Termination Table
First two digits represent
significant figures. Third
digit specifies number of
zeros.
See Dimension Table
400 = 400
450 = 450
500 = 500
550 = 550
600 = 600
Built Into Tomorrow
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Snap-In Aluminum Electrolytic Capacitors – ALA7D, +85°C
Performance Characteristics
Item
Performance Characteristics
Capacitance Range
Rated Voltage
240 – 820 µF
400 – 600 VDC
Operating Temperature
−40 to +85°C
Storage Temperature
−55 to +85°C
Capacitance Tolerance
±20% at 100 Hz/+20°C
D (mm)
Rated Voltage and Ripple Current
at +85°C (hours)
Rated Voltage at +85°C (hours)
25
10,000
16,000
30
13,000
21,000
35
15,000
24,000
40
18,000
29,000
Operational Lifetime
End of Life Requirement
Shelf Life
Leakage Current
Vibration Test Specifications
Standards
VR > 100 VDC ∆ C/C < ±15%, ESR < 3 x ESR Limit, IL < initial specified limit
2,000 hours at +85°C or 30,000 hours at +40°C 0 VDC
I = 0.006 CV or 6,000 µA (whichever is smaller)
C = rated capacitance (µF), V = rated voltage (VDC). Voltage applied for 5 minutes at +20°C.
D ≤ 40 mm
Procedure
Requirements
1.5 mm displacement amplitude
or 20 G maximum acceleration.
Vibration applied for three directions
of 4-hour sessions at 10 – 2,000 Hz.
(Capacitor clamped by body.)
No leakage of electrolyte
or other visible damage.
Deviations in capacitance from
initial measurements must not
exceed Δ C/C ±5%
AEC–Q200: aluminum electrolytic capacitors
IEC 60384–4 long life grade 40/85/56
Surge Voltage
Test Condition
≤ 30 second surge followed by a no load
period of 330 seconds, 1,000 cycles at +85°C
Voltage (VDC)
400
450
500
550
600
440
495
550
605
660
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Snap-In Aluminum Electrolytic Capacitors – ALA7D, +85°C
Test Method & Performance
Endurance Life Test
Conditions
Performance
Temperature
+85°C
Test Duration
2,000 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:
≥ 400 V
Capacitance Change
Equivalent Series Resistance
Leakage Current
Within 10% of the initial value
Does not exceed 150% of the initial limit
Does not exceed leakage current limit
Dimensions – Millimeters
Size Code
BB
BC
BD
CB
CC
CD
CE
CF
DB
DC
DD
DE
DF
EE
EF
Dimensions in mm
D
L
−0/+1
±2
Approximate
Weight
Grams
25
25
25
30
30
30
30
30
35
35
35
35
35
40
40
30
35
40
30
35
40
45
50
30
35
40
45
50
45
50
28
30
35
40
45
50
55
60
50
60
65
75
80
95
105
Note: Dimensions include sleeving
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A4079_ALA7D • 10/26/2020
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Snap-In Aluminum Electrolytic Capacitors – ALA7D, +85°C
Termination Tables
Termination
Code
A
D
F
C
E
25
•
•
•
30
•
•
•
35
•
•
•
•
•
40
•
•
•
•
•
Diameter (mm)
Mounting: These capacitors are designed to be mounted by their terminations alone and
may be used in any position. Dummy pins must be isolated on 4 pin styles.
Termination
Code
Termination
Style
LL
±1
Standard Termination Option
A
2 Pin
6.3
Other Termination Options
D
2 Pin
4.0
F
3 Pin
4.0
C
4 Pin
6.3
E
4 Pin
4.0
Dimensions in mm
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Snap-In Aluminum Electrolytic Capacitors – ALA7D, +85°C
Termination Tables cont.
Style A/D
SIDE VIEW
L
PCB LAYOUT
TERMINAL
END VIEW
D
2 ±0.1
LL
Style F
SIDE VIEW
L
Ø2.5 Minimum
+ ve
SIDE VIEW
L
Ø2 ±0.1 Typical
-
+
4.75 ±0.1
LL
Style C/E
PCB LAYOUT
TERMINAL
END VIEW
3.3 ±0.1
D
10 ±0.1
TERMINAL
END VIEW
10 ±0.1
PCB LAYOUT
4 Holes Ø2 ±0.1
on a Ø22.5 PCD
− ve
-
D
+
LL
30°
30°
+ ve
Black stripe denotes polarity stripe
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A4079_ALA7D • 10/26/2020
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Snap-In Aluminum Electrolytic Capacitors – ALA7D, +85°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 series 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.
KEMET provides an online life calculator that can be used to predict hours of life for a given part number in specific
application conditions. This can be found at: https://elc.kemet.com.
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A4079_ALA7D • 10/26/2020
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Snap-In Aluminum Electrolytic Capacitors – ALA7D, +85°C
End of Life Definition
Catastrophic failure: short circuit, open circuit or safety vent operation
Parametric Failure:
• Change in capacitance > ±15%
• Leakage current > initial specified limit
• ESR > 3 x ESR Limit
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.
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A4079_ALA7D • 10/26/2020
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Snap-In Aluminum Electrolytic Capacitors – ALA7D, +85°C
Table 1 – Ratings & Part Number Reference
VDC
Rated
Capacitance
400
400
400
400
400
400
400
400
400
400
450
450
450
450
450
450
450
450
450
450
500
500
500
500
500
500
500
500
500
500
550
550
550
550
550
550
550
550
550
550
600
600
600
600
600
600
600
600
600
600
100 Hz
20°C (µF)
360
430
470
510
560
620
680
820
820
1000
300
360
390
430
470
470
560
680
680
820
240
270
330
330
390
390
470
510
560
680
180
220
240
270
300
300
360
390
470
560
130
160
180
180
220
220
240
300
330
390
VDC
Rated Capacitance
Size
Code
Case
Size
D x L (mm)
CC
CD
DC
CE
DD
CF
DE
DF
EE
EF
CC
CD
DC
CE
CF
DD
DE
DF
EE
EF
CC
CD
CE
DC
CF
DD
DE
DF
EE
EF
CC
CD
DC
CE
CF
DD
DE
DF
EE
EF
CC
CD
CE
DC
CF
DD
DE
DF
EE
EF
30 x 35
30 x 40
35 x 35
30 x 45
35 x 40
30 x 50
35 x 45
35 x 50
40 x 45
40 x 50
30 x 35
30 x 40
35 x 35
30 x 45
30 x 50
35 x 40
35 x 45
35 x 50
40 x 45
40 x 50
30 x 35
30 x 40
30 x 45
35 x 35
30 x 50
35 x 40
35 x 45
35 x 50
40 x 45
40 x 50
30 x 35
30 x 40
35 x 35
30 x 45
30 x 50
35 x 40
35 x 45
35 x 50
40 x 45
40 x 50
30 x 35
30 x 40
30 x 45
35 x 35
30 x 50
35 x 40
35 x 45
35 x 50
40 x 45
40 x 50
Size Code
Case Size
Ripple Current
100 Hz
85°C (A)
1.8
2.0
2.2
2.2
2.5
2.6
2.8
3.2
3.3
3.7
1.7
2.0
2.1
2.2
2.3
2.4
2.7
3.1
3.1
3.5
1.5
1.7
1.9
1.9
2.1
2.1
2.5
2.6
2.9
3.3
1.4
1.6
1.8
1.9
2.0
2.1
2.3
2.5
2.8
3.2
1.4
1.6
1.7
1.8
2.0
2.0
2.2
2.5
2.7
3.0
ESR
Maximum
Impedance
Maximum
100 Hz
20°C (mΩ)
488
409
380
345
319
285
263
220
246
203
504
420
394
353
322
327
275
228
259
216
1032
916
751
757
636
640
532
490
428
354
943
772
713
630
567
572
477
440
375
315
980
797
708
714
580
585
535
430
399
339
10 kHz
20°C (mΩ)
299
250
235
212
197
175
1628
136
161
133
296
247
233
207
189
194
163
135
164
137
780
693
568
574
481
485
403
371
320
265
651
533
494
435
392
396
331
305
261
220
676
550
488
494
400
405
370
297
277
235
Part Number
SPQ
ALA7D(1)361CC400
ALA7D(1)431CD400
ALA7D(1)471DC400
ALA7D(1)511CE400
ALA7D(1)561DD400
ALA7D(1)621CF400
ALA7D(1)681DE400
ALA7D(1)821DF400
ALA7D(1)821EE400
ALA7D(1)102EF400
ALA7D(1)301CC450
ALA7D(1)361CD450
ALA7D(1)391DC450
ALA7D(1)431CE450
ALA7D(1)471CF450
ALA7D(1)471DD450
ALA7D(1)561DE450
ALA7D(1)681DF450
ALA7D(1)681EE450
ALA7D(1)821EF450
ALA7D(1)241CC500
ALA7D(1)271CD500
ALA7D(1)331CE500
ALA7D(1)331DC500
ALA7D(1)391CF500
ALA7D(1)391DD500
ALA7D(1)471DE500
ALA7D(1)511DF500
ALA7D(1)561EE500
ALA7D(1)681EF500
ALA7D(1)181CC550
ALA7D(1)221CD550
ALA7D(1)241DC550
ALA7D(1)271CE550
ALA7D(1)301CF550
ALA7D(1)301DD550
ALA7D(1)361DE550
ALA7D(1)391DF550
ALA7D(1)471EE550
ALA7D(1)561EF550
ALA7D(1)131CC600
ALA7D(1)161CD600
ALA7D(1)181CE600
ALA7D(1)181DC600
ALA7D(1)221CF600
ALA7D(1)221DD600
ALA7D(1)241DE600
ALA7D(1)301DF600
ALA7D(1)331EE600
ALA7D(1)391EF600
160
160
100
160
100
160
100
100
72
36
160
160
100
160
160
100
100
100
72
36
160
160
160
100
160
100
100
100
72
36
160
160
100
160
160
100
100
100
72
36
160
160
160
100
160
100
100
100
36
36
ESR
Impedance
Part Number
SPQ
10 kHz
85°C (A)
3.9
4.4
4.6
4.8
5.2
5.5
5.8
6.5
6.2
6.8
4.0
4.5
4.6
5.0
5.2
5.2
5.8
6.5
6.1
6.8
3.0
2.9
3.7
3.7
4.1
4.0
4.6
4.8
5.4
6.0
3.0
3.5
3.7
3.9
4.3
4.2
4.8
5.1
5.5
6.1
3.0
3.5
3.8
3.7
4.3
4.2
4.6
5.2
5.4
6.0
Ripple Current
(1) Termination code: See Termination Tables for available options.
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Snap-In Aluminum Electrolytic Capacitors – ALA7D, +85°C
Mechanical Data
Polarity & 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 the 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. Special attention for the safety vent coverage,
which this ensures that internal gas generated can escape when the pressure reaches a certain value due to overstress or
catastrophic failure. All mounting positions must allow the safety vent to work properly.
Insulating Resistance
≥ 100 MΩ at 100 VDC across insulating sleeve
Voltage Proof
> = 3,500 VDC across insulating sleeve
> = 2,500 VAC across insulating sleeve
Safety Vent
A safety vent for overpressure is featured on the base (opposing end to the terminals). This is a weakened area in the bottom
of the can that is designed to relieve build-up of internal pressure due to overstress or catastrophic failure.
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Snap-In Aluminum Electrolytic Capacitors – ALA7D, +85°C
Marking
KEMET Logo
Polarity Stripe (−)
Rated Capacitance,
Capacitance Tolerance
Rated Voltage (VDC)
Series, Capacitance
Code, Voltage Code
Climatic Category
Date of Manufacture,
Batch Number
Made in the
European Union
*Print shown is representative of the data included on the sleeve. Actual appearance can be continuous print style.
Construction
Detailed Cross Section
Insulating End Disc
Anti-Vibration
Groove
Termination Pin
Rubber Seal
Tab Connection
to Terminal
Polarity
Stripe (−)
Aluminum
Can
Margin
Wound Element
Tab
Aluminum Can
Insulating Sleeve
Safety
Vent
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 Aluminum Oxide
with Electrolyte
(Fourth Layer)
(Third Layer)
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Snap-In Aluminum Electrolytic Capacitors – ALA7D, +85°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 defined 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
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Foil tabs
Tissues
Cathode foil
Etching
Forming
Winding
Decking
Impregnation
Assembly
Aging
Testing
Sleeving
Packing
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Snap-In Aluminum Electrolytic Capacitors – ALA7D, +85°C
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Disclaimer
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 indicted or that other
measures may not be required.
KEMET is a registered trademark of KEMET Electronics Corporation.
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