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Hot Products

APR 200 B420L , APR200B420L

Second. Nominal Signal[DC TRMS:Current 4-20mA]
  • MacroQuest Part#APR 200 B420L
  • ManufacturerLEM
  • Standard Lead TimeNA
  • Part StatusActive
    • $117.42 - $125.46
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    Description FAQ Review
    Description

    LEM APR 200 B420L Split-Core AC Current Transducer

    LEM APR 200 B420L Product Overview

    The APR 200 B420L is a split-core AC current transducer from LEM's APR-B420L series, designed for the electronic measurement of AC currents (including distorted VFD and SCR waveforms) with galvanic isolation between the primary and secondary circuits. The B420L variant features switch selectable measuring ranges (100A, 150A, 200A) and a loop-powered 4-20mA current output for direct integration with industrial control systems. Built on LEM's PRiME (Planar Rogowski I Measurement) air-core technology, it delivers true RMS output and eliminates insertion loss.

    Rated for 200 A nominal with selectable 100A/150A/200A measuring ranges, it outputs 4-20mA with ±1% accuracy and ±0.5% linearity. Bandwidth is 30Hz to 6kHz and response time is <150ms (400ms typical in some older specifications). Supply voltage is 12-24V DC (loop-powered). Mass is 90g and operating temperature is -20°C to +60°C. Insulation test voltage is 5kV (4.13kV per latest PCN update for CE/UKCA compliance).

     

    LEM APR 200 B420L Key Specifications

    Parameter

    Value

    Rated current (IPN)

    100A, 150A, 200A (Selectable)

    Measuring range

    Switch selectable (100/150/200A)

    Output signal

    4-20mA DC (Loop-powered)

    Accuracy (XG)

    ±1 %

    Linearity (EL)

    ±0.5 %

    Response time (tr)

    <150 ms (to 90% of step)

    Bandwidth (BW)

    30 Hz ~ 6 kHz

    Supply voltage (UC)

    12-24V DC (Loop-powered)

    Insulation (Vd)

    5 kV (4.13 kV per latest revision)

    Aperture

    18 mm

    Operating temp (TA)

    -20°C to +60°C

    Mass (m)

    90 g

    Mounting

    DIN rail or Panel mount

     

    LEM APR 200 B420L Key Advantages

    The APR 200 B420L employs LEM's PRiME air-core technology, delivering ±1% accuracy with ±0.5% linearity, no saturation, and no insertion loss. The true RMS output ensures accurate measurement even with distorted VFD and SCR waveforms. The split-core design enables quick and easy installation on existing cables without system interruption. The loop-powered 4-20mA current output simplifies wiring and reduces installation costs for industrial control systems. The UL 94-V0 case provides flame-retardant protection and high insulation ensures safety in industrial environments. The APR variant offers true RMS output specifically for non-sinusoidal or noisy current waveforms, distinguishing it from the AP series which provides value averaging for sinusoidal currents only.

     

    LEM APR 200 B420L 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
    Smart grid and energy efficiency monitoring
    Power quality monitoring and sub-metering

     

    Why Choose the LEM APR 200 B420L?

    The APR 200 B420L combines ±1% accuracy, switch selectable ranges 100A/150A/200A, loop-powered 4-20mA output, 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 B420L variant offers 4-20mA current output for seamless integration with PLCs, DCS, and SCADA systems. The APR series is Active and available through authorized distributors with a standard lead time of 10 weeks. Note that this product is subject to a product change notification (PCN-075_2022_1) regarding marking updates and insulation test voltage changes (from 5kV to 4.13kV) effective from November 2022. The part remains fully compliant with CE and UKCA directives and continues to meet all applicable safety and performance standards.

     

    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
    30-Days returns
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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:
    Simon Hsu
    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
    Warner
    Feb 01, 2026
    Great company . Good price . Good Parts !
    Una
    Nov 28, 2025
    Simon is very responsive and thorough.
    Parrish
    Apr 05, 2025
    Excellent and reliable company
    Wheeler
    Dec 30, 2023
    Great supplier. We have done several orders and all come in prisitine condition as stated.
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    Nov 04, 2022
    Good support, great Company
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