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Hot Products

HAH1DR300-S,HAH1DR 300-S

HOT OFFER// Authorized Distributor
  • MacroQuest Part#HAH1DR300-S
  • ManufacturerLEM
  • Standard Lead TimeNA
  • Part StatusActive
    • $21.36 - $36.86
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    100-219 Pieces $32.85
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    Description FAQ Review
    Description

    LEM HAH1DR 300-S Open-Loop Hall Effect Current Sensor

     

    LEM HAH1DR 300-S Product Overview

    The HAH1DR 300-S is an open-loop Hall effect current sensor from LEM's HAH1DR series, designed for electronic measurement of DC, AC, and pulsed currents in automotive high-power applications, with galvanic isolation between the primary (high-power) and secondary (electronic) circuits.

    The sensor utilizes open-loop Hall effect technology, with a rated current of 300A and a measuring range of ±300A. It outputs a ratiometric voltage signal with an accuracy of 3%, a bandwidth of 0~30kHz, and a response time of ≤6µs. Supply voltage is 5V DC (unipolar), and the operating temperature range is -40°C to +125°C.

    The busbar mounting (baseplate mount) design is adopted, and the HAH1DR series offers measurement ranges from 200A to 900A (±200A to ±900A) in the same package, enabling flexible platform-based selection.

     

    LEM HAH1DR 300-S Key Technical Specifications

    Parameter

    Specification

    Model

    HAH1DR 300-S

    Series

    HAH1DR

    Rated Current (I_PN)

    300 A

    Measuring Range (I_PM)

    ±300 A

    Measurement Technology

    Open-loop Hall Effect

    Accuracy

    3 %

    Frequency Bandwidth

    0 ~ 30 kHz

    Response Time

    ≤ 6 µs

    Linearity

    ±1 %

    Supply Voltage

    4.75V ~ 5.25V (typical 5V, unipolar)

    Supply Current (Max)

    20 mA

    Operating Temperature

    -40℃ ~ +125℃

    Mounting Type

    Busbar Mounting / Baseplate Mount

    Output Type

    Ratiometric voltage output

     

    LEM HAH1DR 300-S Key Advantages

    Open-Loop Hall Technology, Non-Contact Measurement: No insertion loss, fast response (≤6µs), suitable for automotive dynamic current monitoring

    300A Rated Current, Covering Mainstream Automotive Applications: Rated 300A, measuring range ±300A, with the same housing supporting flexible switching between ±200A to ±900A ranges — adapts to measurement needs of different power class electronic control units

    -40°C to +125°C Ultra-Wide Operating Temperature: Automotive-grade wide temperature design, adapts to extreme environmental temperature variations, ensuring stable operation under harsh conditions

    Busbar Mounting Design, Compact Structure: Optimized for direct copper bar installation, easy to integrate into battery packs, inverters, and motor controllers

    3% Accuracy + Ultra-Low Thermal Drift: Extremely low thermal offset drift and thermal sensitivity drift ensure stable measurement accuracy across the full temperature range

    Single +5V Supply: Seamlessly interfaces with automotive onboard power systems, simplifying vehicle electrical integration

    Wide Frequency Bandwidth: Accurately captures current signals at different frequencies, adapting to current transient changes during vehicle startup, acceleration, braking, and other operating conditions

     

    Why Choose the HAH1DR 300-S?

    Customer Pain Point

    HAH1DR 300-S Solution

    Need to measure 300A-class automotive currents

    300A rated, ±300A range — meets small-to-medium power motor control and BMS needs

    Wide temperature variations in automotive environments cause accuracy drift

    -40°C~+125°C wide temperature design, ultra-low thermal drift, stable across full range

    Limited installation space

    Compact package, fits automotive control system tight spaces

    Need fast response overcurrent protection

    ≤6µs fast response, timely protection triggering

    Same platform needs different current ratings

    Series covers 200A-900A, same package — flexible expansion

     

    LEM HAH1DR 300-S Target Applications

    Automotive Battery Management Systems (BMS): Power battery charge/discharge current monitoring

    Automotive Motor Control: EV traction motor, starter-generator current monitoring

    Inverter Systems: HEV/EV application current monitoring

    Hybrid/Electric Vehicles: HEV/EV current monitoring

     

    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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    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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    Less
    Review
    Harlan
    Apr 11, 2026
    Shipping was fast. Packing was solid.
    Kaelyn
    Feb 26, 2026
    Awesome quality top product will buy again top supplier.
    Hayden
    Jan 09, 2026
    Very nice to work with Simon !
    Zona
    Dec 14, 2025
    This Company is a really good Company. We have done a few deals with them.
    Naya
    Sep 08, 2025
    The part is original.
     123 
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