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Hot Products

AK 50 C420L , AK50C420L

Second. Nominal Signal[DC RMS:Current 4-20mA]
  • MacroQuest Part#AK 50 C420L
  • ManufacturerLEM
  • Standard Lead TimeNA
  • Part StatusActive
    • $187.05 - $251.55
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    Pieces(Min. Order)
    1-9 Pieces $251.55
    10-99 Pieces $208.46
    >=100 Pieces $187.05
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    Description FAQ Review
    Description

    LEM AK 50 C420L Split-Core AC Current Transducer

    LEM AK 50 C420L Product Overview

    The AK 50 C420L is a split-core AC current transducer from LEM's AK series, designed for the electronic measurement of AC sinusoidal currents with galvanic isolation between the primary and secondary circuits. The C420L variant features jumper selectable measuring ranges (10A, 20A, 50A) and a loop-powered 4-20mA current output.

    Rated for 50 A nominal with selectable 10A/20A/50A measuring ranges, it outputs 4-20mA with ±1% accuracy. Bandwidth is 20Hz to 100Hz and response time is 300ms. Supply voltage is 24V DC (loop-powered). Mass is 120g and operating temperature is -20°C to +50°C. Insulation test voltage is 3kV with 150V AC rated voltage (CAT III, PD2).

     

    LEM AK 50 C420L Key Specifications

    Parameter

    Value

    Rated current (IPN)

    10A, 20A, 50A (Jumper selectable)

    Measuring range

    Jumper selectable (10/20/50A)

    Output signal

    4-20mA DC (Loop-powered)

    Accuracy (XG)

    ±1 %

    Response time (tr)

    300 ms

    Bandwidth (BW)

    20 ~ 100 Hz

    Supply voltage (UC)

    24V DC (Loop-powered)

    Insulation (Vd)

    3 kV RMS

    Rated voltage (Vb)

    150V AC (CAT III, PD2)

    Operating temp (TA)

    -20°C to +50°C

    Mass (m)

    120 g

    Mounting

    Panel mount (DIN rail optional on request)

     

    LEM AK 50 C420L Key Advantages

    The AK 50 C420L employs LEM's air-core technology, delivering ±1% accuracy with reliable RMS measurement for sinusoidal AC currents. The split-core design enables quick installation on existing cables without system interruption. The loop-powered 4-20mA output simplifies wiring and reduces installation costs for industrial control systems. The jumper selectable ranges (10A/20A/50A) provide flexibility without hardware changes. The AK series provides average-responding (RMS calibrated) measurement for sinusoidal currents, distinguishing it from the AKR series which provides True RMS for non-sinusoidal or distorted VFD/SCR waveforms.

     

    LEM AK 50 C420L Typical Applications

    AC sinusoidal current measurement in automation systems
    Panel meters and power management
    Data loggers and remote monitoring
    Renewable energy systems and power supplies
    Standard AC current monitoring applications

     

    Why Choose the LEM AK 50 C420L?

    The AK 50 C420L combines ±1% accuracy, jumper-selectable ranges 10A/20A/50A, loop-powered 4-20mA output, and split-core design in a compact panel-mount package weighing 120g. Manufactured by LEM, it delivers stable, accurate, and safe AC current measurement for sinusoidal current applications. The C420L variant is distinguished by its solid-core construction and loop-powered 4-20mA output, designed for applications where stable sinusoidal waveforms are present and cost-effective RMS measurement is sufficient. The part is Active, RoHS compliant, and available through authorized distributors with a standard lead time of 10 weeks.

     

    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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    Instock & available
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    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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    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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    Review
    Ernie
    Mar 23, 2026
    Second time to buy
    Xenia
    Nov 19, 2025
    It's comfortable doing business with you.
    Fermin
    Sep 30, 2025
    This is the best supplier.
    Upton
    Dec 05, 2024
    The packaging is very careful, thank you very much.
    Harriet
    Jun 09, 2024
    Very good, very satisfied!
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