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Hot Products

LF 205-S/SP3 , LF205-S/SP3

HOT OFFER// Authorized Distributor
  • MacroQuest Part#LF 205-S/SP3
  • ManufacturerLEM
  • Standard Lead TimeNA
  • Part StatusActive
    • $45.36 - $52.82
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    50-143 Pieces $48.56
    >=144 Pieces $45.36
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    Description FAQ Review
    Description

    LEM LF 205-S/SP3 Closed-Loop Hall Effect Current Sensor

     

    LF 205-S/SP3 Product Overview

    The LF 205-S/SP3 is a high-precision current sensor based on closed-loop Hall effect technology, from LEM (Switzerland), the global leader in electrical measurement. Featuring closed-loop compensation technology, it is designed for electronic measurement of DC, AC, and pulsed currents, with galvanic isolation between the primary and secondary circuits.

    The sensor operates on a ±12V to ±15V bipolar supply, with a rated current of 100A, a measuring range of ±200A (up to 3x overload capability), and a 100mA current output. It features a 15.5mm aperture, an operating temperature range of -40°C to +85°C, and complies with EN 50178 and IEC 61010-1 international standards.

     

    LF 205-S/SP3 Key Technical Specifications

    Parameter

    Specification

    Rated Current

    100 A

    Measuring Range

    ±200 A

    Output Signal

    100 mA

    Technology

    Closed-loop Hall Effect

    Turns Ratio

    1:1000

    Accuracy

    ±0.5%

    Linearity

    < ±0.1%

    Response Time (90%)

    < 1 µs

    Delay Time (10%)

    < 500 ns

    di/dt Following Capability

    100 A/µs

    Bandwidth

    DC ~ 100 kHz

    Supply Voltage

    ±12V ~ ±15V

    Insulation Test Voltage

    3.5 kV / 1 minute

    Impulse Withstand Voltage

    8.8 kV

    Operating Temperature

    -40℃ ~ +85℃

    Aperture

    15.5 mm

    Weight

    78 g

     

    LF 205-S/SP3 Key Advantages

    Closed-Loop Hall Technology: Active compensation design eliminates core saturation effects — accuracy ±0.5%, linearity <0.1%

    <1µs Fast Response: Delay time <500ns — perfectly matched for high-frequency IGBT/PWM switching applications

    DC~100kHz High Bandwidth: Accurately measures DC and AC current up to 100kHz — suitable for modern high-frequency power supplies

    Superior Noise Immunity: Closed-loop architecture provides high external magnetic field rejection — stable operation in complex industrial EMI environments such as VFDs and high-power drives

    3x Overload Capability: Withstands instantaneous overloads up to 3x rated current without damage — handles motor starting and load transients

    -40℃~+85℃ Wide Temperature Range: Covers applications from cold outdoor to high-temperature industrial environments — compliant with EN 50178 and IEC 61010-1 standards

    15.5mm Aperture: Easy busbar or conductor passage — multiple panel mounting options — fits various industrial cabinet layouts

     

    Why Choose the LF 205-S/SP3?

    ±0.5% High Accuracy + <0.1% Linearity: Closed-loop compensation technology ensures accurate measurement across the full range — meets industrial precision control requirements

    <1µs Fast Response: Accurately captures IGBT switching transients and current spikes during load changes — provides timely and reliable triggering signals for overcurrent protection

    100kHz High Bandwidth: Accurately measures current waveforms up to 100kHz — perfectly matches the output characteristics of modern high-frequency switching power supplies and VFDs

    3.5kV High-Voltage Isolation + 8.8kV Impulse Withstand: Reinforced insulation between primary and secondary — ensures control system safety, compliant with EN 50178 industrial safety standards

    -40℃~+85℃ Wide Temperature Operation + Low Drift: Passes rigorous environmental adaptability tests — temperature drift only ±0.25mA — suitable for outdoor enclosures, rail transit, and other extreme temperature scenarios

    15.5mm Aperture + Compact Design: Easy busbar passage — flexible installation, saves cabinet space — weight only 78g

    Target Applications

    AC variable frequency drives and servo motor drives, DC motor drive static converters, battery-powered equipment, uninterruptible power supplies (UPS), switch-mode power supplies (SMPS), welding power supplies, renewable energy systems

     

    FAQ
    Q
    What is the advantage of MacroQuest?
    A
    Our advantage is that we not only low prices, but we more suited to you.
    Our Keywords is
    New and original parts
    Fast Delivery
    Instock & available
    Short Leadtime
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    Q: I want to work with MacroQuest because of high quality. But I found your price too high and out of line with the prevailing market level, how should I do?
    A: MacroQuest has been devoted to offer a best price to our customers,if you want to buy it at a cheapper price. Please contact us directly to see if we can negotiate  a cheaper price rate. Or, send us an email with your T/P.
    Simon Hsu
    simon@mymacroquest.com
    Alice Wang
    alice@mymacroquest.com

    Q: Can MacroQuest offer NET terms?
    A: Yes we can. Please contact with your sales manager for more information.

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    1.Choose an item using a search box or browsing through product categories.Click on "Request Quote" button on the Product page.
    2.Click here for feedback on our web.
    3.If you have a BOM list or want to email us directly, please contact:
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    Alice Wang
    alice@mymacroquest.com

    Q：Are all the parts new and original?
    -A:Yes, all parts are new and original checked by our quality control department.

    Q：How long is your warranty?
    -A:We offer a 1 year warranty for form fit and function for MacroQuest stock. 


    Q:  Can I use Credit Card/Debit Card payment for my orders on your website?
    -A:Yes, you can. you can pay on our company via Credit Card/Debit Card（Mastercard, Discover, Visa, American EXpress, Diners).

    Please select the first payment method-Paypal, then you will see Credit Card/Debit Card payment button in the lower right corner.



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    Lorene
    Apr 27, 2026
    Good and reliable company!
    Nalani
    Jan 24, 2026
    Very responsible. Thank you. Cooperation in the future
    Xavier
    Jan 30, 2025
    The sales and I communicated very well and timely.
    Abbey
    Mar 04, 2024
    Great parts. Good supplier.
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    Jun 24, 2023
    Always Perfect Win-Win
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