944U101K122ACM Cornell-Dubilier, 944U101K122ACM Datasheet - Page 3

• Manufacturer Part Number: 944U101K122ACM
• Description: CAPACITOR; POLYPROPYLENE FILM; CAP 100UF; VOL-RTG 1200V
• Manufacturer: Cornell-Dubilier

Specifications of 944U101K122ACM

• Capacitance: 100 μF
• Esr: 1.3 Milliohms
• Material, Element: Polypropylene MetallizedÂ
• Termination: Screw Terminal
• Tolerance: ±10 %
• Voltage, Rating: 1200 VDC
• Inverters: DC Link
• Capacitance Range: 33 μF to 220 μF
• Voltage Range: 800 VDC to 1400 VDC
• Capacitance Tolerance: ±10% Standard
• Operating Temperature Range: –40°C to +85°C
• Lead Free Status / Rohs Status: RoHS Compliant part

Expected Lifetime Predictions
CDE Cornell Dubilier
To use the Expected Lifetime curves calculate Va ⁄Vr and core
temperature T. Start by estimating:
Units:
NOTE: The temperature rise in the 944U is I²(ESR) times the
thermal resistance θ. The ESR is mainly the metal resistance;
the metal resistance is the 10 kHz ESR. For operation below
10kHz add the dielectric resistance. It is the dielectric
dissipation factor—no more than 0.0002—times the capacitive
reactance, i.e., 0.0002 ⁄(2πfC).
That’s equal to 31.83 ⁄(fC).
A=m²
C=μF
ESR=mΩ
f=kHz
I=A
Applied dc voltage Va
Ripple Current I
Ripple Frequency f
Ambient Temperature Ta
Airflow speed v
Type 944U
•
1605 E. Rodney French Blvd.
T, Ta & Tc=°C
Va &Vr=Vdc
v=m/s
θ, θca & θcc =°C/W
Permissible Voltage Surge Duty for 100,000 Hour
Factor
1.67x
1.50x
1.30x
1.10x
1.00x
Life Expectancy at 50 ºC Core Temperature
Polypropylene Film Capacitors for DC Filtering
•
New Bedford, MA 02740
t≤ 100 ms
t≤ 5 minutes
t≤ 2.5 hours
t≤ 9.6 hours
balance (11.9 h)
Duration
1. Start with the 10 kHz ESR from the Ratings table. If frequency
is less than 10 kHz, add 31.83 ⁄(fC).
2. Compute total thermal resistance θ as the sum of core-to-case
thermal resistance θcc and case-to-ambient thermal resistance
θca. Both are in the Ratings table but θca is for still air and θcc
is for 10 kHz or less. For frequency > 10 kHz multiply θcc by
[1+(f –10)/100], e.g., for 75 kHz multiply θcc by 1.65. For moving
air use the capacitor surface area A and airflow speed v to calculate
θca = 1 ⁄[A(5+17.5(v+0.1)
3. Compute Va ⁄Vr and the core temperature T.
T = Ta + I²(ESR)θ
4. Look up estimated lifetime from the Expected Lifetime curves.
5. If you want a longer expected lifetime, choose a capacitor with
higher voltage rating or consider using multiple capacitors in
parallel to share the ripple current.
Frequency
1x/day
1x/day
1x/day
1x/day
1x/day
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Phone: [phone]
0.66
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Fax: [phone] www.cde.com