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Hot Products

HAH1DR400-S,HAH1DR 400-S

HOT OFFER// Authorized Distributor
  • MacroQuest Part#HAH1DR400-S
  • ManufacturerLEM
  • Standard Lead TimeNA
  • Part StatusActive
    • $21.36 - $36.86
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    Description FAQ Review
    Description

    LEM HAH1DR 400-S Open-Loop Hall Effect Current Sensor

     

    LEM HAH1DR 400-S Product Overview

    The HAH1DR 400-S is a high-precision current sensor from LEM's HAH1DR series, based on open-loop Hall effect technology. It is designed for electronic measurement of DC, AC, and pulsed currents, with galvanic isolation between the primary and secondary circuits.

    The sensor utilizes open-loop Hall effect technology, with a rated current of 400A and a measuring range of ±400A. It outputs a ratiometric voltage signal (2.5 + G × Ip) 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 suitable for automotive motor control, battery management systems, and other applications. The HAH1DR series offers measurement ranges from 200A to 900A in the same package, enabling flexible platform-based selection.

     

    LEM HAH1DR 400-S Key Technical Specifications

    Parameter

    Specification

    Model

    HAH1DR 400-S

    Series

    HAH1DR

    Rated Current (I_PN)

    400 A

    Measuring Range (I_PM)

    ±400 A

    Output Signal

    2.5 + G × Ip (ratiometric voltage output)

    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

    Application

    Automotive Motor Control, Battery Management Systems

    Part Status

    Active

     

     

    LEM HAH1DR 400-S Key Advantages

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

    400A Rated Current, Covering Mainstream Automotive Applications: Rated 400A, measuring range ±400A, with the same housing supporting flexible switching between ±200A to ±900A ranges

    -40°C to +125°C Ultra-Wide Operating Temperature: Automotive-grade wide temperature design, adapts to extreme environmental temperature variations

    Busbar Mounting Design, Compact Structure: Optimized for direct copper bar installation, easy to integrate

    3% Accuracy + Ultra-Low Thermal Drift: Meets accuracy requirements for automotive motor control and battery management current measurement, with stable measurement accuracy across the full temperature range

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

    Fully Ratiometric Output: Output voltage precisely replicates the primary current variation profile, providing real, reliable current data to the vehicle controller

    Series Selection: HAH1DR series covers multiple ranges from 200A to 900A in the same package design, flexible expansion based on application needs

     

    Why Choose the HAH1DR 400-S?

    Customer Pain Point

    HAH1DR 400-S Solution

    Need to measure 400A-class automotive high currents

    400A rated, ±400A range — meets medium-to-high 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 400-S Target Applications

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

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

    Inverter Systems: Real-time current monitoring, ensuring stable startup and energy conversion

    Uninterruptible Power Supplies (UPS): Input/output current monitoring

    Switch-Mode Power Supplies (SMPS): High-frequency switching current monitoring

    Renewable Energy Systems: PV inverters, wind turbine current monitoring

    Industrial Drives: Pumps, fans, elevators, forklifts — equipment control/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
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    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
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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
    Quintion
    Apr 26, 2026
    Trustful Company
    Earl
    Jan 23, 2026
    Very good and very satisfied
    Paloma
    Nov 04, 2025
    Perfect, the original part.
    Rosie
    Jul 08, 2025
    Satisfied as always!
    Kennedy
    Apr 23, 2025
    Supplier delivers fast
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