ALC10C331ED450 BHC COMPONENTS, ALC10C331ED450 Datasheet - Page 16

• 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

14
THESE NOTES SHOULD BE READ IN CONJUNCTION WITH THE PRODUCT DATA SHEET. FAILURE TO OBSERVE THE RATINGS
AND THE INFORMATION ON THIS SHEET MAY RESULT IN A SAFETY HAZARD.
WARNING
When potentially lethal voltages e.g. 30V a.c. (r.m.s) or 60V d.c. are applied to the terminals of this product, the
use of a hazard warning label is recommended. In the case of motor start capacitors they meet the requirements of
British Standard Specifications BS.5267:1976 and reference should be made to Appendix C - Guide for installation and
operation.
1. MATERIAL CONTENT
Electrolyte
Aluminium electrolytic capacitors contain liquids
(electrolytes) which can be hazardous. The electrolytes
are conducting solutions of organic and/or boric acid,
neutralised with amines or ammonia, in a variety of solvents.
The major solvents are butyrolactone and ethylene glycol.
Co-solvents e.g. N-methyl pyrolidone may be present.
Inorganic or organo-phosphates are present in low
concentration.
The physical, chemical and toxicological properties of the
electrolytes are largely determined by the solvents, as
summarised below:
Physical Properties
1. Low viscosity - typically 5 - 50 cp at 25°C
2. Combustible - Flash points 95 - 120°C
3. Low vapour pressure - < 20mm Hg at 25°C
Chemical properties
1. Non-corrosive.
2. Can be aggressive to many plastics, lacquers and
resins.
3. Totally soluble in hot water.
Toxicology
The electrolytes are moderately toxic, with LD50 values in
the range 1.5 - 2g/Kg.
Skin exposure can cause drying and de-fatting. Severe
irritation may be caused to the mucous membranes,
particularly the eyes, where conjunctivitis may result.
Safety Precautions
In the event of electrolyte escape, wash the affected area
with hot water. Use rubber gloves to avoid skin contact.
Any contact with the eyes should be liberally irrigated with
water, and medical advice sought.
Note - the electrolyte systems do not contain materials
currently listed as carcinogenic, mutagenic or teratogenic,
e.g. polychlorinated biphenyls (PCB’s), dimethylformamide
(DMF) or dimethylacetamide (DMA).
The capacitor case may be aluminium, polycarbonate or
Noryl. Aluminium cans are usually sleeved with PVC or
polyolefin.
Other Materials
The end seal (cover) may be nylon, phenolic or
polybutylteraphthallate (PBT) or an EPR rubber/phenolic
laminate.
Sealing rings and pressure vents are EPR or silicone rubber.
2. PHYSICAL FORM
These capacitors are cylindrical, with axial, radial or screw
terminations.
3. INTRINSIC PROPERTIES
Operating
D.C. capacitors are polar devices, and will operate safely
only if correctly connected. Reversing the connections will
result in high leakage currents which could subsequently
cause short circuit failure, rupture of the safety vent and
possibly explosion and fire.
Correctly polarised operation may result in the above failure
modes if:
- the surge voltage is exceeded.
- the ambient temperature is too high.
- excessive ripple currents are applied.
A.C. typres are non-polar. Catastrophic failure may be
caused by:
- Abnormal duty cycles.
- Voltage in excess of rated value.
- Ambient temperature too high.
Non Operating
Aluminium electrolytic capactiors contain liquids which can
leak out (see material content).
Damage to the encapsulation may cause leakage of the
electrolyte. Excessive torque or soldering heat may affect
the performance of the capacitor or damage the sealing.
Electric shock may result if capacitors are not discharged.
4. FLAMMABILITY
Most plastics and elastomers are combustible, i.e. will ignite
if an ignition source is applied under suitable conditions
of temperature and oxygen level. For most published data
the UL94 Horizontal or Vertical Burning System has been
applied. Although useful for comparative values, this test is
not practicable, as the ignition characteristics are strongly
influenced by the material dimensions, and other materials
with which they may be in intimate contact.
BHC has completed a series of flammability tests based on
a Needle Flame Test as specified in IEC 695-2-2. Full details
of the tests undertaken on both the external components,
and internal wind elements, can be found in a full technical
article, TD005, “Flammability Characteristics” contained
within BHC “Aluminium Electrolytic Capacitors – Application
Notes”.
Product Safety