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Hot Products

LESR 15-NP , LESR15-NP

Second. Nominal Signal[Instantaneous:Voltage 2.5 +/- 0.625 V]
  • MacroQuest Part#LESR 15-NP
  • ManufacturerLEM
  • Standard Lead TimeNA
  • Part StatusActive
    • $11.65 - $14.86
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    Description FAQ Review
    Description

    LEM LESR 15-NP LESR Series Closed-Loop Current Transducer


    15A Rated Current x ±51A Measuring Range — Fluxgate-Level Performance with Voltage Output for PCB Mounting

     

    LEM LESR 15-NP Product Overview

    The LESR 15-NP is a closed-loop Hall effect current transducer from LEM's LESR series, designed for the electronic measurement of DC, AC, and pulsed currents with galvanic isolation between the primary and secondary circuits . This PCB-mount sensor features an integrated primary conductor and a unipolar +5 V supply, simplifying integration for modern electronic systems. The LESR series delivers performance comparable to Fluxgate technology without the added cost, achieved through a proprietary ASIC with multiple Hall cells and advanced offset cancelling techniques .

    Rated for 15 A nominal with a ±51 A measuring range , it outputs a ratiometric voltage of 2.5 V ± 0.625 V (instantaneous) with 0.45% accuracy and ±0.1% linearity . Sensitivity is 41.67 mV/A . Response time is 0.4 µs and bandwidth is 300 kHz . Supply voltage is +5 V (4.75 to 5.25 V), with a maximum supply current of 27.5 mA . Operating temperature is -40°C to +105°C . Insulation test voltage is 4.3 kV with a creepage and clearance distance of 7.55 mm .

     

    LEM LESR 15-NP Key Specifications

    Parameter

    Value

    Rated current (IPN)

    15 A

    Measuring range (IPM)

    0 … ±51 A

    Output signal (VOUT)

    2.5 V ± 0.625 V (ratiometric)

    Sensitivity

    41.67 mV/A

    Supply voltage (VC)

    4.75 … 5.25 V

    Accuracy (XG)

    ±0.45%

    Linearity (EL)

    ±0.1%

    Response time (tr)

    0.4 µs

    Bandwidth (BW)

    DC … 300 kHz

    Insulation (Vd)

    4.3 kV

    Creepage and clearance

    7.55 mm

    Operating temp (TA)

    -40°C … +105°C

    Mounting

    PCB through-hole

     

    LEM LESR 15-NP Key Advantages

    The LESR 15-NP employs closed-loop Hall effect technology with a proprietary ASIC, delivering 0.45% accuracy and ±0.1% linearity while maintaining very low offset drift . The ±51 A range provides ample headroom for measuring nominal currents up to 15 A with transient overcurrent capability, while the 0.4 µs response time and 300 kHz bandwidth capture fast-changing switching and pulse waveforms with high fidelity . The PCB-mount design with integrated primary conductor simplifies board-level integration, and the reference pin with Ref IN and Ref OUT modes offers flexible signal conditioning and enhanced system-level flexibility . The unipolar +5 V supply simplifies power design, and the 4.3 kV insulation ensures robust safety isolation. The device is 100% footprint compatible with the previous CASR series, ensuring seamless integration into existing designs .

     

    LEM LESR 15-NP Typical Applications

    AC variable speed and servo motor drives
    Static converters for DC motor drives
    Battery supplied applications
    Uninterruptible Power Supplies (UPS)
    Switched Mode Power Supplies (SMPS)
    Power supplies for welding applications
    Solar inverters

     

    Why Choose the LEM LESR 15-NP?

    The LESR 15-NP combines a 15 A nominal rating with a ±51 A measuring range and 0.45% accuracy in a compact, PCB-mount package with unipolar +5 V supply. Manufactured by LEM, it delivers stable, accurate, and safe current measurement for industrial power conversion and motor control applications. The closed-loop Hall effect design offers fluxgate-like performance, excellent linearity, very low offset drift, and high dv/dt immunity, making it a reliable choice for critical systems where measurement integrity is paramount. The reference access pin provides added functionality that simplifies system design and enhances measurement flexibility .

     

    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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    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

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    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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    Feb 10, 2026
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    Prompt response, super fast delivery, one of our best sources for electronics demands.
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    Super good quality
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    Awesome quality top product will buy again top supplier.
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