ALC10C331ED450 BHC COMPONENTS, ALC10C331ED450 Datasheet - Page 9

• Manufacturer Part Number: ALC10C331ED450
• Description: CAPACITOR, 330UF 450V CAPACITOR, 330UF 450V
• Manufacturer: BHC COMPONENTS
• Series: ALC10r

Specifications of ALC10C331ED450

• Capacitance: 330UF
• Voltage Rating, Dc: 450V
• Capacitor Dielectric Type: ALUMINIUM ELECTROLYTIC
• Temp, Op. Max: 85(DEGREE C)
• Temp, Op. Min: -40(DEGREE C)
• Tolerance,: 20%
• Rohs Compliant: YES

The manufacturing process begins with the
anode foil being electrochemically etched
to increase the surface area and then
‘formed’ to produce the aluminium oxide
layer.
Both the anode and cathode foils are then
interleaved with absorbent paper and
wound into a cylinder. During the winding
process aluminium tabs are attached to
each foil to provide the electrical contact.
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 aluminium
can, and sealed. Throughout the process
all materials inside the housing must be
maintained at the highest purity and be
compatible with the electrolyte.
Before being sleeved and packed each capacitor is aged
and tested. The purpose of ageing is to repair any damage
in the oxide layer and thus reduce the leakage current
to a very low level. Ageing is normally carried out at the
rated temperature of the capacitor and is accomplished by
applying voltage to the device whilst 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:
After completion of the production process a sample from
each batch is taken by the quality department. This sample
size is controlled by the use of recognised 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:
Mechanical/Visual:
 slitting of the anode foil after forming
 attaching the tabs to the anode foil
 minor mechanical damage caused during winding
 Leakage current
 Capacitance
 ESR
 Impedance
 Tan Delta
 Overall dimensions
 Torque test of mounting stud
 Print detail
 Box labels
 Packaging, including packed quantity
Anode foil
Extended cathode
Cathode foil
Impregnation
Assembly
Tissues
Forming
Sleeving
Winding
Decking
Packing
Testing
Etching
Ageing
Manufacturing Process
Foil tabs
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