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Hot Products

ATO-75-B225-D10

HOT OFFER// Authorized Distributor
  • MacroQuest Part#ATO-75-B225-D10
  • ManufacturerLEM
  • Standard Lead TimeNA
  • Part StatusActive
    • $34.29 - $58.69
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    60-599 Pieces $55.71
    600-1199 Pieces $38.57
    >=1200 Pieces $34.29
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    Description FAQ Review
    Description

    LEM ATO-75-B225-D10 ATO Series Split Core Current Transformer


    75A Rated Current x 1:1000 Turns Ratio — Non-Invasive AC Current Measurement for Smart Grid and Energy Monitoring

     

    LEM ATO-75-B225-D10 Product Overview

    The ATO-75-B225-D10 is a split-core current transformer from LEM‘s ATO Series, designed for the electronic measurement of AC waveforms with galvanic isolation between the primary circuit (power line) and the secondary circuit (measurement). The split-core design enables quick and non-invasive installation on insulated cables without interrupting the power supply. This self-powered unit features a 10 mm aperture and delivers a 1:1000 turns ratio output.

    Rated for 75 A nominal with a 75 A measuring range (50Hz–60Hz), it outputs a current signal according to the 1:1000 turns ratio with 1% accuracy class and 1% linearity. Response time is ≤ 300 ms and bandwidth is 50 Hz – 60 Hz. Supply voltage is self-powered (no external supply needed). Mass is 81 g and operating temperature is -10°C to +55°C. Insulation test voltage is 4300 V with application up to 600 V CAT III PD2, basic insulation.

     

    LEM ATO-75-B225-D10 Key Specifications

    Parameter

    Value

    Rated current (IPN)

    75 A

    Measuring range (IPM)

    75 A

    Output signal (ISN)

    Current, 1:1000 ratio

    Turns ratio

    1:1000

    Supply voltage (VC)

    Self-powered

    Accuracy (XG)

    1% Class

    Linearity (EL)

    1%

    Response time (tr)

    ≤ 300 ms

    Bandwidth (BW)

    50 Hz – 60 Hz

    Insulation (Vd)

    4300 V

    Aperture

    10 mm

    Operating temp (TA)

    -10°C to +55°C

    Mass (m)

    81 g

    Mounting

    Chassis / Panel mount

     

    LEM ATO-75-B225-D10 Key Advantages

    The ATO-75-B225-D10 employs air-core (Rogowski) technology, delivering 1% accuracy class while maintaining a split-core design for rapid installation without service interruption. The 75 A range provides compatibility with typical industrial and energy measurement applications, while the ≤ 300 ms response time and 50/60 Hz bandwidth capture fundamental frequency AC currents with low phase shift. The 10 mm aperture accommodates standard insulated power cables and the chassis mount enables flexible panel or DIN rail installation. The 4300 V insulation ensures safe galvanic isolation for low-voltage systems up to 600 V CAT III.

     

    LEM ATO-75-B225-D10 Typical Applications

    Hybrid inverters and home energy storage systems
    Energy metering and active power calculation
    Building sub-metering for energy efficiency monitoring, consumption analysis, and cost allocation
    Power quality monitoring for electrical loads and distribution equipment
    Distributed measurement systems
    Condition monitoring for motor loads such as conveyors, pumps, and HVAC equipment

     

    Why Choose the LEM ATO-75-B225-D10?

    The ATO-75-B225-D10 combines 75 A rated current, 1:1000 turns ratio, 1% accuracy, 10 mm aperture, self-powered operation, and split-core convenience in a compact 33.5 x 32.0 x 45.5 mm package. Manufactured by LEM, it delivers stable, accurate, and safe current measurement for industrial applications. The split-core design offers rapid non-invasive installation and maintenance, ideal for retrofit and field-upgrade scenarios.

     

    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
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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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    3.If you have a BOM list or want to email us directly, please contact:
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    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. 


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    -A:Yes, you can. you can pay on our company via Credit Card/Debit Card（Mastercard, Discover, Visa, American EXpress, Diners).

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    Ivory
    Mar 05, 2026
    We do business with them regularly, always a pleasure working with Simon.
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    Jan 27, 2026
    warm service!
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    Oct 16, 2025
    The transportation is very good, the quality is also very good, I will buy again.
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    Sep 20, 2025
    Nice company
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    Jun 29, 2023
    The delivery speed is fast.
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