ER-Series Capacitors

ER Series Capacitor feature image
  • ER-Series Capacitors

    NWL’s ER-Series polypropylene DC link film capacitors offer a distinct alternative to small round cans, both film and electrolytic, with high capacitance density power in an economical standard package. The rectangular aluminum package with various mounting bracket options enables the capacitor to be operated in a variety of orientations. Component inventory, integration, and installation are streamlined as a result.  ER-Series capacitors are well suited for many inverter applications including:

    • DC input / output filtering
    • DC link
    • AC harmonic filtering
    • High energy storage pulse

    Unique features of the ER-Series capacitor include:

    • Standard economic package – With standard terminals and case construction, NWL created automated assembly to enhance production efficiency.
    • Unique stackable bracket design – Welded metal brackets enable capacitors to be mounted and stacked on floor or wall vertically or horizontally. Three bracket versions are available.
    • Robust, rugged, and reliable construction – ER-Series capacitors are used in numerous high reliability, mission-critical applications such as renewable energy inverters.
    • Inverter design flexibility – Compact design and mounting options give designs more component layout alternatives.
  • ER-Series Capacitors Product Information and Specifications

    Originally designed to replace electrolytic type capacitors, ER-Series capacitors are now widely used for DC link, AC harmonic filter, and energy storage, and pulse power applications. They provide a unique rectangular can approach utilizing the latest polypropylene film dielectric technologies of self healing electrodes and use UL 94V-0 thermosetting dry resin encapsulation.

    General Specifications

    Reference standard IEC 1071-1
    Capacitance Tolerance +/- 10
    Voltages DC rating continuous steady state condition
    DC pk pulse duty, < 20% reversal
    DC surge 1 minute 1 time per day
    AC RMS sinewave @ 60 Hz
    Test T-T @ 1.5 VDC, 10 seconds
    Test T-C @ 2.0Vpk dc + 1000 V, 10 seconds
    Current / Temp Ratings ripple RMS current @ 55°C ambient
    peak current @ 40°C ambient
    VA VAC RMS x Amps RMS max value
    Inductance 20 – 90 nH
    Operating Temperature -40°C to +85°C
    Encapsulation UL 94V-0 thermosetting resin

     

    Electrical Ratings

    Part # uF

    +10% -5%
    VDC

    continuous
    Vpk

    pulse
    VAC

    RMS @ 60Hz
    Current

    RMS@ 55°C
    Current

    peak
    Inductance

    nH
    ER1025-X* 3800 800 1000 60 90 10,000 33
    ER1050-X* 3500 800 1000 110 145 12,500 40
    ER1100-X* 2900 900 1125 135 150 10,000 30
    ER1125-X* 2900 900 1125 85 90 8,500 33
    ER1200-X* 2400 1100 1375 165 150 10,000 30
    ER1225-X* 2400 1100 1375 100 90 8,500 33
    ER1250-X* 1900 1200 1500 210 150 7,500 30
    ER1275-X* 1900 1200 1500 125 90 6,500 33
    ER1300-X* 1500 1300 1625 265 150 7,000 30
    ER1325-X* 1500 1300 1625 160 90 6,000 30
    ER1400-X* 1150 1500 1875 330 145 6,000 30
    ER1425-X* 1150 1500 1875 210 90 5,500 30
    ER1450-X* 800 1750 2150 350 120 5,000 30
    ER1470-X* 650 1900 2375 350 120 5,000 30
    ER1700-X* 525 2100 2625 480 140 7,000 30
    ER1725-X* 525 2100 2625 350 80 4,000 30
    ER1735-X* 360 2600 3250 480 130 5,000 30
    ER1750-X* 250 3000 3750 660 120 5,000 30
    ER1800-X* 100 3600 4500 725 120 5,500 33

    The “X” suffix refers to the mounting bracket location and style. Four options available:

    “N” – standard brackets mounted on the bottom for vertical position
    “W” – brackets mounted on the bottom and one side for vertical and horizontal
    “L” – brackets mounted on the bottom and both sides for horizontal position
    no suffix – No brackets

    Bracket Mounting Options

    A significant innovation is the bracket configuration, with three options that enable the capacitor to be positioned within an enclosure or bulkhead.

    ER N Bottom Mounting ER W bottom side mounting ER L Bottom Side Top Mounting ER no Mounting
    N – bottom mounting W – bottom and side mounting L – bottom side and top mounting No bracket

    Additionally, these capacitors can be stacked together as part of a large energy storage, input/output filter, or pulse power bank. When used as part of a large bank, sufficient air flow between the individual capacitors is essential for effective heat transfer from the packages to the ambient environment, and the ER-Series design takes that into consideration with a gap that allows cooling air to flow between capacitors.