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Hot Products

AT 50 B5 , AT50B5

HOT OFFER// Authorized Distributor
  • MacroQuest Part#AT 50 B5
  • ManufacturerLEM
  • Standard Lead TimeNA
  • Part StatusActive
    • $129.85 - $171.41
    / Pieces
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    Pieces(Min. Order)
    1-9 Pieces $171.41
    10-79 Pieces $155.82
    >=80 Pieces $129.85
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    Description FAQ Review
    Description

    AT50B5 Current Sensor – Accurate & Reliable AC Current Measurement Solution


    AT50B5 Product Overview

    The AT50B5 is a high-performance AC current transducer from internationally renowned manufacturer LEM USA Inc., designed for industrial-grade current monitoring and protection applications. Featuring a split-core design, it enables non-contact AC current measurement and is widely used in power systems, motor control, power supply monitoring, aerospace, and automotive electronics.

    The AT50B5 integrates a current transformer and RMS circuit into a single housing, operating in a self-powered mode without requiring an external power supply — significantly reducing system design complexity and installation costs.


    AT50B5 Key Features

    Split-Core Design for Easy Installation

    The split-core design provides a 16 mm sensing aperture, allowing the device to be clamped directly onto the cable without interrupting the circuit — true “clip-on, measure-on” convenience.

    Self-Powered Operation – Zero Power Worries

    Self-powered design eliminates the need for an external power supply, greatly simplifying system integration.

    0-5V Analog Output – Plug-and-Play

    Provides a 0-5V DC analog voltage output, compatible with PLCs, DCS systems, and data acquisition equipment without additional signal conditioning circuits.

    High Accuracy for System Reliability

    Measurement accuracy of ±1.5% and linearity of ±0.5% ensure precise current readings, providing solid data for system protection and decision-making.

    Wide Temperature Range for Harsh Environments

    Operating temperature from -20°C to +60°C — stable performance whether in cold outdoor substations or hot industrial cabinets.


    AT50B5 Technical Specifications

    Parameter

    Specification

    Manufacturer

    LEM USA Inc.

    Measurement Type

    AC Current

    Rated Measuring Current

    50A

    Output Signal

    Ratiometric, 0V ~ 5V voltage output

    Accuracy

    ±1.5%

    Linearity

    ±0.5%

    Response Time

    300ms

    Operating Frequency

    50/60Hz

    Power Supply

    Self-powered

    Operating Temperature

    -20°C to +60°C

    Sensing Aperture

    16mm (non-contact measurement)

    Insulation Class

    UL94-V0 flame retardant

    Dielectric Strength

    3.5kV RMS / 50Hz / 1min

    Dimensions

    44.5 × 67 × 36.5mm


    AT50B5 Typical Applications

    With its excellent measurement performance and flexible installation, the AT50B5 is widely adopted across various industrial sectors:

    Motor Control
    Real-time motor current monitoring for fast detection of overload and stall conditions, effectively protecting motor equipment.

    Power Supply Monitoring
    Accurate current measurement in power supply circuits to detect overcurrent and anomalies, ensuring stable system operation.

    Power Plant Monitoring
    Generator output current monitoring for fast fault and overload identification, providing real-time data for safe plant operation.

    Industrial Automation
    Integrates with PLC/DCS systems for real-time current sensing on production lines, enabling smart manufacturing upgrades.

    Power Distribution Systems
    The split-core design makes it an ideal choice for retrofitting older distribution panels without modifying existing wiring.


    Why Choose the AT50B5

    Comparison

    AT50B5

    Traditional CT

    Installation

    Split-core, no wiring interruption

    Often requires circuit disconnection

    Power Supply

    Self-powered, no external supply

    Typically needs external power

    Output Signal

    0-5V analog, direct controller interface

    Often mA-level, requires conversion

    Flame Retardant

    UL94-V0 housing

    Varies by brand

    Environmental

    -20°C to +60°C wide range

    Depends on model

     

    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
    ISO9001 Certification
    1 Year Warranty 

    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.

    Q: How to Request a Quote?
    -A:You have three ways to request a quote:
    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:
    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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    The on-line orders system within the MacroQuest’s service works at real time, thanks to which it is immediately (at the moment of placing the order) possible to make a reservation for the selected product in the warehouse what it will be automatically noted in the on-line service.
    If you order a product, it will be reserved for you.
    You can make changes in quantity in the cart, by adding and removing items from the not closed order, before you direct them to realization with the “finish the order” button.

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    Returning a Product

    RMA# is required for all returns. They are issued for returns that are within 30 days of the initial purchase.

    Return Policy
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    Less
    Review
    Dick
    Jul 18, 2025
    The goods are delivered super fast
    Everett
    Jul 03, 2025
    Excellent quality!
    Vien
    May 04, 2025
    Very satisfied with the parts, will definetely order again.
    Xenia
    May 02, 2025
    Big order went smoothly!
    Yale
    Feb 19, 2024
    We had many cooperations with Macroquest ,Excellent Company with good renown here ,Hope we can have more Excellent cooperations in the near future .Thanks !
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