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Hot Products

CTSR0.3-P/SP5,CTSR 0.3-P/SP5

Second. Nominal Signal[Instantaneous:Voltage 2.5 +/- 0.46875 V]
  • MacroQuest Part#CTSR0.3-P/SP5
  • ManufacturerLEM
  • Standard Lead TimeNA
  • Part StatusActive
    • $48.15 - $64.75
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    PCS(Min. Order)
    1-27 PCS $64.75
    28-139 PCS $52.16
    >=140 PCS $48.15
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    Description FAQ Review
    Description

    LEM CTSR 0.3-P/SP5 Closed-Loop Fluxgate Current Sensor

     

    LEM CTSR 0.3-P/SP5 Product Overview

    The CTSR 0.3-P/SP5 is a closed-loop Fluxgate current sensor from LEM's CTSR series, designed for non-contact, compact, and accurate milliamps measurement of DC, AC, and pulsed currents with galvanic isolation between the primary and secondary circuits .

    This sensor is specifically designed for residual and leakage current measurement, with a nominal current of 300mA and a measuring range of ±500mA . It outputs a voltage signal (2.5V ± 1.2V) with a sensitivity of 4V/A and ±1.9% accuracy . It operates on a single +5V supply with an operating temperature range of -40°C to +105°C .

    The CTSR series utilizes closed-loop Fluxgate technology, ensuring high accuracy and very low offset drift over temperature, making it particularly suitable for industrial applications such as PV inverter residual current detection .

     

    LEM CTSR 0.3-P/SP5 Key Technical Specifications

    Parameter

    Specification

    Model

    CTSR 0.3-P/SP5

    Series

    CTSR

    Measurement Technology

    Closed-loop Fluxgate

    Nominal Current (IPN)

    0.3 A (300 mA)

    Measuring Range (IPM)

    ±0.5 A (500 mA)

    Output Signal

    Instantaneous voltage (2.5V ± 1.2V)

    Sensitivity

    4 V/A

    Accuracy (XG)

    ±1.9 %

    Linearity (εL)

    ±0.5 %

    Frequency Bandwidth

    DC ~ 3.5 kHz

    Response Time (tr)

    50 µs

    Supply Voltage (VC)

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

    Supply Current (Max)

    21.6 mA

    Number of Channels

    1

    Polarization

    Unidirectional

    Measurement Type

    AC/DC

    Mounting Type

    PCB Mount (Through-Hole)

    Operating Temperature

    -40℃ ~ +105℃

    Isolation Voltage

    2200 Vrms

    Package / Case

    Module, Single Pass Through

    MSL

    1 (Unlimited)

    RoHS

    Compliant

    ECCN

    EAR99

    Part Status

    Active

     

    LEM CTSR 0.3-P/SP5 Core Advantages

    Closed-Loop Fluxgate Technology, High Accuracy & Low Drift — ±1.9% accuracy and ±0.5% linearity with very low offset drift across -40°C to +105°C, ideal for precision residual current detection applications

    Single +5V Supply, Simplified Design — 4.75V ~ 5.25V unipolar supply with voltage output (2.5V ± 1.2V), eliminates the need for bipolar supply and simplifies ADC interfacing

    High Sensitivity 4V/A, Precise mA Current Measurement — 4V/A sensitivity accurately captures mA-level leakage currents, suitable for PV inverter residual current detection (compliant with VDE 0126-1-1 and UL 1741)

    Built-in Degauss and Test Functions — Ensures long-term measurement accuracy and reliability, simplifying system maintenance

    Wide Operating Temperature Range — -40°C to +105°C for outdoor PV inverters and harsh industrial environments

    Compact PCB Mount Design — Modular package, through-hole mounting for space-constrained board designs

     

    Why Choose the CTSR 0.3-P/SP5?

    Optimized for Residual Current Detection — Specifically designed for residual and leakage current measurement in transformerless PV inverters (VDE 0126-1-1 and UL 1741 compliant) and other applications requiring small leakage current detection

    Closed-Loop Fluxgate Technology — Superior to open-loop Hall sensors with higher accuracy and lower temperature drift across the full temperature range

    High Sensitivity & Wide Range — 4V/A sensitivity captures mA-level currents with ±500mA range covering typical residual current detection needs

    Built-in Degauss & Test — Integrated functions ensure long-term accuracy and simplify system maintenance

    International Safety Standards — Compliant with VDE 0126-1-1, UL 1741, EN 50178, UL 508, and IEC 61010-1 for global industrial applications

     

    LEM CTSR 0.3-P/SP5 Target Applications

    PV Inverter Residual Current Detection — Leakage current detection in transformerless PV inverters (VDE 0126-1-1 and UL 1741 compliant)

    Residual Current Monitoring — Residual current detection in industrial equipment

    Symmetrical Fault Detection — Fault detection in motor drive systems

    Power Source Failure Detection — Power system monitoring

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

    Switch Mode Power Supplies (SMPS) — High-frequency switching 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
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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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