UL3 SERIES
Unlytic ®
Unlytic ®UL3 / UL31 / UL32 / UL34 / UL35 Series
The UL31 / UL32 / UL34 / UL35 UNLYTIC ®UL3 SERIES represent the “best”
choice for high power DC lter applications because of the combination of
physical and electrical properties it oers.
FEATURES STANDARD CONFIGURATION
-Inductance as low as 25nH
(less than 10nH available)
-Low ESR
-Current carrying capability to
110 amps
-Withstands hostile
environments
-Integrated mounting anges
-UL31/UL35 Male Terminal
-UL32/UL34 Female Terminal
-UL31/UL32 Standard ESL
-UL34/UL35 Special Low ESL
Rev. 2
 Specication Summary
Capacitance Range
6.5µF to 350.0µF
Capacitance Tolerance
Standard tolerance is ±10%. Tolerances of ±20% and ±5% are
also available.
Operating Temperature Range
-55°C to +105°C
Enclosure/ Construction
Thermal plastic with high current terminals.
Voltage Rating
500VDC to 2200VDC
Quality Control
Capacitors are tested 100% for:
o Capacitance
o Tolerance
o Dissipation Factor
o Dielectric withstanding voltage
o Insulation Resistance
o Equivalent Series Resistance (ESR)
Process and inspection data are maintained on le and available
on special request.
Environmental
Parameter Method Condition
Vibration 204 D
Immersion 104 B
Shock 213 I
Humidity 106 -
Thermal Shock 107 A
Life 108 F
Reference MIL-STD-202
 Characteristics
Insulation Resistance
Temperature(°C) 25 85 105 
Megaohmsx
Microfarads
10,000 1,000 100
Insulation Resistance
Dielectric Strength
Capacitors withstand a DC potential of 1.3 x rated
voltage for one (1) minute without damage or
breakdown. Test voltage is applied and discharged
through a minimum resistance of 100 OHM per volt
minimum.
Capacitance Change
Temperature(°C) -55 25 105
PercentageChange
(typical)
+2.0 0 -4.0
CapacitanceChange
Dissipation Factor
Polypropylene has an intrinsic dissipation factor of less than 2.1
x 10-4 over the operating temperature range of -55°C to +105°C
and frequencies to 1MHz.
Rev. 2
DATA
33.3 27.3 19.6 4.7
IN CIRCUIT
PART NUMBER
VOLTAGE
VALUE CASE "H" "L" Fres "L" Fres I pk dv/dt E.S.R.
VDC uF mm nH kHz nH kHz mOHMS 25°C 45°C 65°C 85°C 105°C
UL3_Q157K 500 150 40 25 82.2 12 118.6 5769 38 0.47 110.3 95.7 78.5 56.3 13.4
UL3_Q207K 500 200 51 32 62.9 15 91.9 5809 29 0.57 105.4 91.5 75.1 53.9 12.8
UL3_Q277K 500 275 64 50 42.9 25 60.7 5672 21 0.77 97.2 84.4 69.3 49.7 11.8
UL3_Q307K 500 300 79 55 39.2 27 55.9 5022 17 1.70 77.1 66.9 54.9 39.4 9.4
UL3_K107K 600 100 40 25 100.7 12 145.3 4396 44 0.62 91.2 79.2 65.0 46.6 11.1
UL3_K157K 600 150 51 32 72.6 15 106.1 4979 33 0.67 96.8 84.0 68.9 49.9 11.8
UL3_K207K 600 200 64 50 50.3 25 71.2 4714 24 0.93 87.0 75.7 62.0 44.5 10.6
UL3_K257K 600 250 79 55 42.9 27 61.3 4782 19 1.79 77.4 67.2 55.1 39.6 9.4
UL3_N706K 800 70 40 25 120.3 12 173.7 3846 55 0.71 88.0 76.4 62.7 45.0 10.7
UL3_N107K 800 100 51 32 89.0 15 129.9 4149 41 0.80 89.5 77.7 63.8 45.7 10.9
UL3_N137K 800 130 64 50 62.4 25 88.3 3830 29 1.15 78.8 68.4 56.1 40.3 9.6
UL3_N167K 800 160 79 55 53.7 27 76.6 3826 24 2.20 69.2 60.1 49.3 35.4 8.4
UL3_BL356K 1000 35 40 25 170.1 12 245.6 2692 77 1.02 72.6 63.0 51.7 37.1 8.8
UL3_BL506K 1000 50 51 32 125.8 15 183.8 2905 58 1.16 74.1 64.3 52.8 37.8 9.0
UL3_BL706K 1000 70 64 50 85.1 25 120.3 2887 41 1.53 69.6 60.4 49.6 35.6 8.5
UL3_BL806K 1000 80 79 55 75.9 27 108.3 2678 33 3.20 57.5 49.9 40.9 29.4 7.0
UL3_L256K 1200 25 40 25 201.3 12 290.6 2198 88 1.26 63.7 55.3 45.4 32.5 7.8
UL3_L356K 1200 35 51 32 150.4 15 219.7 2324 66 1.45 64.0 55.5 45.6 32.7 7.8
UL3_L506K 1200 50 64 50 100.7 25 142.4 2357 47 1.87 61.3 53.2 43.7 31.3 7.5
UL3_L606K 1200 60 79 55 87.6 27 125.0 2296 38 3.74 52.8 45.9 37.6 27.0 6.4
UL3_M186K 1500 18 40 25 237.3 12 342.4 1978 110 1.42 62.8 54.5 44.7 32.1 7.6
UL3_M256K 1500 25 51 32 177.9 15 259.9 2075 83 1.64 62.7 54.4 44.7 32.0 7.6
UL3_M356K 1500 35 64 50 120.3 25 170.1 2062 59 2.15 59.1 51.3 42.1 30.2 7.2
UL3_M406K 1500 40 79 55 107.3 27 153.1 1913 48 4.49 48.9 42.4 34.8 25.0 5.9
UL3_BX106K 1800 10 40 25 318.3 12 459.4 1596 160 1.67 57.3 49.7 40.8 29.3 7.0
UL3_BX156K 1800 15 51 32 229.7 15 335.5 1719 115 1.91 58.0 50.3 41.3 29.6 7.1
UL3_BX206K 1800 20 64 50 159.2 25 225.1 1559 78 2.79 50.1 43.5 35.7 25.6 6.1
UL3_BX276K 1800 27 79 55 130.6 27 186.4 1549 57 5.56 43.5 37.8 31.0 22.2 5.3
UL3_S655K 2200 6.5 40 25 394.8 12 569.9 1297 199 2.06 51.9 45.1 37.0 26.5 6.3
UL3_S905K 2200 9.0 51 32 296.6 15 433.2 1289 143 2.56 49.0 42.5 34.9 25.0 6.0
UL3_S126K 2200 12 64 50 205.5 25 290.6 1170 97 3.72 42.5 36.9 30.2 21.7 5.2
UL3_S176K 2200 17 79 55 164.6 27 234.9 1220 72 7.08 38.4 33.3 27.3 19.6 4.7
CURRENT RATING (AMPS RMS )
10 kHz TO 100 kHz CONTINUOUS
AMBIENT TEMPERATURE
UL31, 32, 34 AND UL35
ELECTRICAL SPECIFICATIONS
UL31 AND UL32
ESL FOR ESL FOR
UL34 AND UL35
Rev. 2
ADDITIONAL INFORMATION
The combination of physical and electrical properties it oeres encompasses low inductance with high
current carrying capability – and a low prole to make the most ecient use of system space and
increased cooling eciency. Plus an in-house developed, “specic to the task” thermoplastic formulation
for the enclosure, improves thermal conductivity. There is also an integrated ange with pre-drilled holes
to simplify mounting.
The UNLYTIC ®UL3 SERIES, with its introduction, the designer has a lm capacitor for high
power lter systems that will maximize space utilization, performance and reliability. With the
added potential for measurable production cost savings.
HOW TO ORDER
TYPE
Metallized Polypropylene UL3
STYLE / VOLTAGE
UL31, UL32, UL34, UL35 / DC Voltage Rating: Q=500VDC, K=600, etc. 1 Q
CAPACITANCE IN PICOFARADS
The rst two digits are signicant, the third represents the number of zeros
(e.g 506=50,000,000pF) 157
TOLERANCE
Standard tolerance is ±10%. Tolerances of ±20% and ±5% are also
available. K
Marking And Date Code
All capacitors are marked with company initials "EC", corporate logo or EC trademark—in addition to type UL3, capacitance,
tolerance, rated DC working voltage and date code. The rst two digits of the date code represent the year, the second two digits the
week, i.e., 0952 is the 52nd week of 2009, 0902 is the second week of 2009.
Quality Assurance
Major emphasis is placed on quality assurance. EC is an ISO 9001-2000 and AS9100:2004 Certied Company. Raw material
inspection and the use of SPC manufacturing procedures assure the highest quality standards. Procedures are fully described in the
EC Quality Control Manual. Electronic Concepts will continue to advance the state-of-the-art by utilizing leading edge technology,
compact capacitor designs and establishing reliability procedures.
Sales Oces
United States Europe
Eastern:
*Headquarters*
P.O. Box 1278
Eatontown,NJ 07724
Tel: 732-542-7880
Fax: 732-542-0524
Central:
Illinois 630-668-8747
email: sales@ecicaps.com
website:www.ecicaps.com
Ireland
Electronic ConceptsEurope LTD
IDA Estate, Oughterad
Co. Galway, Ireland
tel: +353-91-552385,552432
fax: +353-91-552387
email: sales@ecicaps.ie
website:www.electronicconcepts.ie
Rev. 2