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Hot Products

AP 400 B10 , AP400B10

Second. Nominal Signal[DC RMS:Voltage 0-5V]
  • MacroQuest Part#AP 400 B10
  • ManufacturerLEM
  • Standard Lead TimeNA
  • Part StatusActive
    • $117.42 - $125.56
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    1-49 Pieces $125.56
    >=50 Pieces $117.42
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    Description FAQ Review
    Description

    LEM AP 400 B10 Split-Core AC Current Transducer

    LEM AP 400 B10 Product Overview

    The AP 400 B10 is a split-core AC current transducer from LEM's AP-B10 series, designed for the electronic measurement of AC sinusoidal waveform currents with galvanic isolation between the primary and secondary circuits. The B10 variant features switch selectable measuring ranges (200A, 300A, 400A) and a switch selectable voltage output (0-5V DC or 0-10V DC). Built on LEM's proprietary PRiME (Planar Rogowski I Measurement) air-core technology, it delivers RMS output for sinusoidal currents.

    Rated for 400 A nominal with selectable 200A/300A/400A measuring ranges, it outputs analog voltage (selectable 0-5V or 0-10V) with ±1% accuracy and ±0.5% linearity. Bandwidth is 30Hz to 2kHz and response time is <150ms. Supply voltage is 24V DC ±5% (22.8V to 25.2V) and current consumption is <30mA. Mass is 90g and operating temperature is -20°C to +60°C. Insulation test voltage is 5kV with IP20 protection, and the aperture accommodates cables up to Ø18mm.

     

    LEM AP 400 B10 Key Specifications

    Parameter

    Value

    Rated current (IPN)

    200A, 300A, 400A (Selectable)

    Measuring range

    Switch selectable (200/300/400A)

    Output signal

    0-5V DC or 0-10V DC (Switch selectable)

    Accuracy (XG)

    ±1 %

    Linearity (EL)

    ±0.5 %

    Response time (tr)

    <150 ms

    Bandwidth (BW)

    30 Hz ~ 2 kHz

    Supply voltage (UC)

    24V DC (22.8V to 25.2V)

    Current consumption

    <30 mA

    Insulation (Vd)

    5 kV

    Aperture

    18 mm

    Operating temp (TA)

    -20°C to +60°C

    Mass (m)

    90 g

    Mounting

    DIN rail or Panel mount

     

    LEM AP 400 B10 Key Advantages

    The AP 400 B10 employs LEM's PRiME air-core technology, delivering ±1% accuracy with ±0.5% linearity, no saturation, and no insertion loss. The RMS output ensures accurate measurement of sinusoidal AC currents. The split-core design enables quick and easy installation on existing cables without system interruption. The switch selectable measuring ranges (200A/300A/400A) and switch selectable voltage output (0-5V or 0-10V) provide flexibility for different applications. The UL 94-V0 case provides flame-retardant protection and 5kV isolation ensures safety in industrial environments. The AP series provides RMS output for sinusoidal currents, distinguishing it from the APR series which provides true RMS for non-sinusoidal or noisy waveforms.

     

    LEM AP 400 B10 Typical Applications

    VFD Controlled Loads (motor and load monitoring)
    SCR Controlled Loads (phase angle and burst fired SCR measurement)
    Switching Power Supplies and Electronic Ballasts
    Automation systems and data loggers
    Panel meters and power management
    Smart grid and energy efficiency monitoring

     

    Why Choose the LEM AP 400 B10?

    The AP 400 B10 combines ±1% accuracy, switch selectable ranges 200A/300A/400A, switch selectable voltage output (0-5V or 0-10V), split-core design, and 5kV insulation in a compact DIN-rail/panel-mount package weighing only 90g. Manufactured by LEM, it delivers stable, accurate, and safe AC current measurement for energy and automation applications. The B10 variant offers selectable ranges and voltage outputs for flexible system integration, compliant with IEC 61010-1 standards. The part is Active and available through authorized distributors.

     

    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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    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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    -A:You have three ways to request a quote:
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    3.If you have a BOM list or want to email us directly, please contact:
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    simon@mymacroquest.com
    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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    Review
    Bart
    Mar 10, 2026
    The quality is very good, original one.
    Oakes
    Nov 16, 2025
    Great company ! Very professional and parts always come new & original. Special thanks to Elsa !
    Benjamin
    Sep 01, 2025
    warm service!
    Ivory
    Aug 02, 2024
    Very professional and flexible
    Davon
    Mar 01, 2024
    New and original, Good people
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