PSU27035A Cornell-Dubilier, PSU27035A Datasheet - Page 3

• Manufacturer Part Number: PSU27035A
• Description: Capacitor; Motor Start; Alum Electrolytic; Cap 270-324 uF; Vol-Rtg 220/250 VAC; QC
• Manufacturer: Cornell-Dubilier

Specifications of PSU27035A

• Capacitance: 270-324 μF
• Case Code: 7
• Diameter: 2-1⁄16 in. ± 0.015 in.
• Frequency, Operating: 50 to 60 Hz
• Length: 4-3⁄8 in. ± 0.06 in.
• Material, Element: Aluminum Electrolytic
• Power Factor: 10% (Max.)
• Standards: Meets EIA RS-463 Type 2 Specifications
• Temperature, Operating, Maximum: 65 °C
• Temperature, Operating, Minimum: -40 °C
• Termination: Quick Connect
• Voltage, Rating: 220⁄250 VAC
• Capacitance Range: 21 to 1280 μF
• Voltage Range: 110 to 330 VAC
• Operating Temperature: –40°C to +65°C
• Operating Frequency: 50 to 60 Hz
• Lead Free Status / Rohs Status: RoHS Compliant part

CDE Cornell Dubilier•1605 E. Rodney French Blvd.•New Bedford, MA 02744•Ph: [phone]•Fax: [phone]• www.cde.com
Type PSU
VOLTAGE RATING
The capacitors's rated voltage must be greater than or equal to
the average voltage across the capacitor' s terminals during the mo-
tor starting cycle. This is not the same voltage as the motor
line voltage. In addition, the cutoff voltage rating of the capaci-
tor must be greater than or equal to the maximum voltage attained
across the terminals of the capacitor in actual service.
The maximum recommended cut-of f voltages for the four stan-
dard voltage ratings are as follows:
These ratings are based on the maximum capacitor temperature
of 65 ºC.
CAPACITANCE RATING
The capacitance is chosen to give the necessary starting torque to
the motor. The minimum capacitance value is the minimum de-
signed capacitance. The maximum capacitance is 20% more than
the minimum value.
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 standard Type
II capacitors are listed in Table A. CDE type PSU capacitors may be
used in any intermittant application within their temperature and
voltage range where the duty cycle does not exceed that listed in Table
A. This is in accordance with the standards in EIA Specification
RS-463 for Type II capacitors. If a particular application exceeds the
normal duty cycle, but does not exceed the values listed in Table B,
an extra performance or Type I capacitor is required.
FREQUENCY
These capacitors are designed for 60 Hz application but may
be operated in the range of 47 Hz - 60 Hz without damage provided
voltage limitations stated above are observed. For other variations
in frequency, contact CDE.
Voltage (rms)
Rated
125
165
250
330
Motor Start Capacitors
Cut-Off Voltage (rms)
Maximum
160
210
300
400
Application Guide
MOUNTING
Vertical mounting of the capacitor with the terminals
up is recommended. However, horizontal mounting is
acceptable providing the vent is in the upward position.
Vertical mounting with the terminals down is not
recommended because the capacitor life may be reduced.
Typical life expectancy is 50,000 cycles for 125V ratings, and 40,000
total cycles for 165, 250 and 330V ratings. The number of cycles
shown in the table above are for the convenient test time of 35 days
total for all ratings.
If an application exceeds the duty cycles of Type I, other methods of
capacitor selection must be used. Contact CDE, for Engineering
assistance.
Volta ge
Volta ge
Ra te d
Ra te d
(rm s)
(rm s)
VAC
VAC
125
165
250
330
125
165
250
330
108-130 145-174
161-193 233-280
243-292 378-454
400-480 590-708
645-774 800-960
108-130 124-149
130-156 216-259
233-280 340-408
378-454 590-708
108-130 189-227
216-259 324-389
108-130 130-156
Duty Cycles of Type I
Duty Cycles of Type II
From
21-25
21-25
21-25
36-43
72-86
21-25
25-36
36-43
72-86
Ca pa citance
Ca pa citance
Ra ting (µF)
Ra ting (µF)
all
all
all
all
81-106
88-106
88-106
88-106
30-36
64-77
21-25
30-36
64-77
To
Table B
Table A
Se cs.
Se cs.
Duty Cycle
(On)
Duty Cycle
(On)
0.75 29.25 2.500
0.75 29.25 2.500
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Se cs.
Se cs.
(Off)
(Off)
119
179
239
119
179
239
119
179
239
119
179
239
59
89
59
89
59
89
59
89
59
59
59
Cycle
Cycle
1.670
1.110
0.833
0.556
0.417
1.670
1.110
0.833
0.556
0.417
1.670
1.110
0.833
0.556
0.417
1.670
1.110
0.833
0.556
0.417
1.670
1.670
1.670
Duty
Duty
%
%
75,000
40,000
40,000
40,000
Sta rts
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
Sta rts
of
of
#
#