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Hot Products

LA 55-TP , LA55-TP

HOT OFFER// Authorized Distributor
  • MacroQuest Part#LA 55-TP
  • ManufacturerLEM
  • Standard Lead TimeNA
  • Part StatusActive
    • $17.86 - $23.58
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    Description FAQ Review
    Description

    LEM LA 55-TP Closed-Loop Hall Effect Current Sensor

     

    LA 55-TP Product Overview

    The LA 55-TP is a high-precision current sensor based on closed-loop Hall effect technology, from LEM (Switzerland), the global leader in electrical measurement. Featuring closed-loop (compensated) Hall effect principle, it is designed for electronic measurement of DC, AC, and pulsed currents.

    The sensor operates on a ±12V to ±15V bipolar supply, with a rated current of 50A, a measuring range of ±70A, and a 50mA current output. It features a 12.7×7mm rectangular aperture for easy busbar or conductor passage on PCB. With a wide operating temperature range of -40℃ to +85℃, it is RoHS compliant and a classic choice for high-current monitoring in AC variable frequency drives, servo drives, and UPS systems.

     

    LA 55-TP Key Technical Specifications

    Parameter

    Specification

    Rated Current

    50 A RMS

    Measuring Range

    ±70 A

    Output Signal

    50 mA instantaneous current

    Turns Ratio

    1:1000

    Measurement Technology

    Closed-loop Hall Effect (compensated)

    Accuracy @ 25°C

    ±0.65%

    Linearity

    ±0.15%

    Bandwidth

    DC ~ 200 kHz

    Response Time

    < 500 ns

    Supply Voltage

    ±12V ~ ±15V

    Operating Temperature

    -40℃ ~ +85℃

    Aperture

    12.7 × 7 mm

    Mounting Type

    PCB through-hole

    Warranty

    5 years

     

    LA 55-TP Key Advantages

    Closed-Loop Hall Technology: Active compensation design eliminates core saturation effects — accuracy ±0.65%, linearity ±0.15%

    <500ns Ultra-Fast Response + 200kHz High Bandwidth: Response time <500ns, bandwidth up to 200kHz — perfectly matched for high-frequency IGBT/PWM switching applications

    Superior Noise Immunity: Closed-loop architecture provides high external magnetic field rejection — stable operation in complex industrial EMI environments such as VFDs and high-power drives

    -40℃~+85℃ Ultra-Wide Temperature Range: Covers applications from cold outdoor to high-temperature industrial environments — compliant with EN 50178 industrial standards

    12.7×7mm Rectangular Aperture: PCB through-hole design — easy busbar or conductor passage — compact integration

    UL 94-V0 Flame Retardant Case: Insulating plastic case meets UL94-V0 standard — ensures electrical safety

    5-Year Factory Warranty: LEM quality commitment — long-term supply assurance

     

    Why Choose the LA 55-TP?

    ±0.65% High Accuracy + ±0.15% Linearity: Closed-loop compensation technology ensures accurate measurement across the full range — meets industrial precision control requirements

    <500ns Ultra-Fast Response: Accurately captures IGBT switching transients and current spikes during load changes — provides timely and reliable triggering signals for overcurrent protection

    200kHz High Bandwidth: Accurately measures current waveforms up to 200kHz — perfectly matches the output characteristics of modern high-frequency switching power supplies and VFDs

    -40℃~+85℃ Wide Temperature Operation + Low Drift: Passes rigorous environmental adaptability tests — suitable for outdoor enclosures, rail transit, and other extreme temperature scenarios

    PCB Through-Hole Mount + Compact Design: 12.7×7mm aperture for easy busbar passage — PCB mounting saves cabinet space

     

    LA 55-TP Target Applications

    AC variable frequency drives and servo motor drives, DC motor static converters, uninterruptible power supplies (UPS), switch-mode power supplies (SMPS), welding power supplies, battery-powered equipment, renewable energy systems

     

    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
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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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    Alice Wang
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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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