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LA Series | Current Transducers | LEM

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LA Series | Current Transducers | LEM Skip to main content EN JP CN EN JP CN Check Stock Career Investors Contact Products Applications Support About Lem Search Current Sensors 45-90 A 90-180 A 187.5-375 A 375-750 A 750-1500 A 1500-3000 A 3000-6000 A 6000-12000 A 12000-24000 A Other value All Current Sensors Voltage Sensors 25-50 V 50-100 V 100-200 V 200-400 V 400-800 V 800-1600 V 1600-3200 V 3200-6400 V All Voltage Sensors Integrated Current Sensors GO Series HMSR Series GXS Series GXN Series GXM Series All Integrated Current Sensors Rogowski Coil ART Series ARU Series ARH Series INTEGRATORS FOR ROGOWSKI COILS Energy Meters DCES DCBM 400 & 600 DCBM 100 TEMA4G EM4T II All Energy Meters Automotive Battery Management EV Chargers Automotive Motor Control Smart Grid Welding Automation Drives High Precision Power Supplies Renewable Energies Trackside Traction After Sales & RMA Merchandize authorization RMA Categories All after sales and RMA Downloads Application Notes Brochures Certificates All Downloads Technical FAQs General All Technical FAQs Company Information History Board of Directors & Committees Organization Values Compliance Sustainability Our locations All Company Information Quality & Environment Quality Environment All Quality & Environment Our partners Become a LEM Supplier Our general terms & conditions Our distributors News & Events All News & Events What do you need ? Product information Check Stock Global information GO EN JP CN EN JP CN Products Current Sensors Voltage Sensors Integrated Current Sensors Rogowski Coil Energy Meters Applications Automotive Battery Management EV Chargers Automotive Motor Control Smart Grid Welding Automation Drives High Precision Power Supplies Renewable Energies Trackside Traction Support After sales and RMA Downloads Technical FAQs About Lem Company Information Quality & Environment Suppliers News & Events Check Stock Career Investors Contact What do you need ? Product information Check Stock Global information GO Home lem_current_page : LA Series LA Series DC, AC pulse currents' measurements of 0.25 ARMS to 500 ARMS nominal with galvanic isolation

Order now Distributor List Contact Sales LA Series – Current Sensors The LA Series current sensors are closed‑loop Hall‑effect transducers designed for the precise measurement of DC, AC, and pulsed currents while providing reinforced galvanic isolation between the primary and secondary circuits. Covering a broad range of nominal currents, from 5 Arms up to 500 Arms depending on the model, the LA series offers multiple form factors and mounting options to support diverse integration requirements across industrial and railway environments.

Most LA parts are designed for printed circuit board (PCB) mounting, featuring compact housings and primary conductor apertures adapted for plug‑type crossings, with sizes varying by model. These PCB‑mount sensors are recognized for their excellent accuracy and fast response times, making them highly suited for industrial applications.

Several higher‑current models, such as LA 205, LA 305, and LA 306, are intended for panel mounting and include larger primary apertures to accommodate thicker conductors. The LA 306 variant is specifically oriented toward industrial applications.

The LA 200‑500 SD represents a distinct product within the LA Series. It is a split‑core, panel‑mount current sensor featuring a large 67 × 67 mm aperture, enabling easy installation around existing conductors. Built on closed‑loop Hall‑effect technology, it delivers high accuracy and fast response times, particularly suited for traction and railway current measurement applications.

Across the entire LA Series, the combination of closed‑loop architecture, galvanic isolation, and optimized mechanical design ensures reliable and precise current measurement in demanding environments.

LA Series – Features and benefits Main characteristicsClosed‑loop (compensated) Hall effect current transducersGalvanic isolation between primary and secondary circuitsInsulating plastic case recognized according to UL 94‑V0Standard current outputPCB‑mount design for the majority of models (LA 25 to LA 200, LA 130/150, LA 55/100)Panel‑mount design for higher‑current models (LA 205, LA 305, LA 306)Split‑core design for LA 200–500 SD (allows installation without cutting the primary conductor)BenefitsExcellent accuracyVery good linearityLow temperature driftOptimized response timeWide frequency bandwidthHigh immunity to external magnetic interferenceNo insertion lossesCurrent overload capabilityTypical applicationsIndustrial applications(All LA models except LA 200–500 SD are designed primarily for industrial use.)

AC variable speed drives & servo motor drivesStatic converters for DC motor drivesBattery‑supplied applicationsUninterruptible Power Supplies (UPS)Switched Mode Power Supplies (SMPS) / SPMSPower supplies for welding applicationsTraction applications(Only for LA 200–500 SD, the split‑core version.)

Propulsion & braking choppersPropulsion convertersAuxiliary convertersBattery chargersEnergy meters LEM LA – Download & Technical Characteristic Product

Check stock

DocumentNominal valueSupply Voltage rangeOp. TemperatureLA 25-NP

Datasheet
3D5 A, 6 A, 8 A, 12 A, 25 A15 to 15-40 to 85°CLA 25-NP/SP11

Datasheet1 A15 to 150 to 70 °CLA 25-NP/SP39

Datasheet2 A15 to 15-40 to 85°CLA 25-NP/SP13

Datasheet0.5 A15 to 15-40 to 70°CLA 25-NP/SP14

Datasheet0.25 A15 to 15-10 to 70 °CLA 25-NP/SP38 Datasheet0.4 A15 to 15-40 to 85°CLA 25-NP/SP25

Datasheet
3D5 A, 6 A, 8 A, 12 A, 25 A15 to 15-40 to 85°CLA 25-NP/SP34

Datasheet1.5 A15 to 15-40 to 85°CLA 25-NP/SP7

Datasheet2.5 A15 to 150 to 70 °CLA 25-NP/SP8

Datasheet2 A15 to 150 to 70 °CLA 10-PB Datasheet
3D10 A15 to 15-20 to 80°CLA 25-NP/SP9

Datasheet1.5 A15 to 150 to 70 °CLA 35-NP/SP3 Datasheet17.5 A15 to 15-25 to 70 °CLA 35-NP

Datasheet
3D7 A, 8 A, 11 A, 17 A, 35 A15 to 15-25 to 70 °CLA 25-P

Datasheet
3D12,5 A12 to 15-25 to 85°CLA 55-P

Datasheet
3D50 A12 to 15-40 to 85°CLA 55-P/SP1

Datasheet
3D50 A12 to 15-40 to 85 °CLA 55-P/SP11

Datasheet50 A15 to 15-40 to 85 °CLA 55-P/SP2

Datasheet50 A14 to 14-40 to 85 °CLA 55-P/SP21

Datasheet50 A12 to 15-40 to 85 °CLA 55-P/SP23

Datasheet50 A12 to 15-40 to 85 °CLA 55-P/SP26

Datasheet50 A12 to 15-40 to 85 °CLA 55-P/SP7

Datasheet50 A12 to 15-40 to 85 °CLA 55-TP

Datasheet
3D50 A12 to 15-40 to 85 °CLA 55-TP/SP1

Datasheet50 A12 to 15-40 to 85°CLA 55-TP/SP27

Datasheet50 A12 to 15-40 to 85°CLA 55-TP/SP28 Datasheet50 A12 to 15-40 to 85°CLA 100-TP/SP2 Datasheet60 A15 to 150 to 70 °CLA 100-P/SP6 Datasheet85 A12 to 15-40 to 85°CLA 100-P

Datasheet100 A12 to 15-40 to 85 °CLA 100-P/SP13

Datasheet100 A12 to 15-25 to 70 °CLA 100-P/SP4 Datasheet100 A12 to 15-40 to 85 °CLA 100-TP

Datasheet100 A12 to 15-40 to 85 °CLA 100-TP/SP10 Datasheet
3D100 A12 to 15-40 to 85 °CLA 100-TP/SP7 Datasheet100 A12 to 15-40 to 85 °CLA 125-P

Datasheet
3D125 A12 to 15-40 to 85°CLA 125-P/SP1

Datasheet
3D125 A12 to 15-25 to 85 Â°CLA 125-P/SP16 Datasheet
3D125 A12 to 15-25 to 85 Â°CLA 125-P/SP3

Datasheet125 A12 to 15-25 to 85 Â°CLA 125-P/SP4

Datasheet125 A12 to 15-40 to 85 °CLA 125-P/SP7

Datasheet125 A12 to 15-25 to 85 Â°CLA 130-P

Datasheet
3D130 A12 to 15-40 to 85°CLA 130-P/SP1

Datasheet
3D130 A12 to 15-40 to 85 °CLA 150-P

Datasheet
3D150 A12 to 15-40 to 85 °CLA 150-P/SP1

Datasheet
3D150 A12 to 15-40 to 85 °CLA 150-TP

Datasheet
3D150 A12 to 15-40 to 85°CLA 150-TP/SP1

Datasheet
3D150 A12 to 15-40 to 85°CLA 205-S/SP15 Datasheet200 A12 to 15-40 to 85°CLA 200-P

Datasheet
3D200 A12 to 15-40 to 85°CLA 200-P/SP10 Datasheet200 A12 to 15-25 to 85 Â°CLA 200-P/SP12

Datasheet200 A15 to 150 to 45 Â°CLA 200-P/SP14 Datasheet
3D200 A15 to 15-25 to 85 Â°CLA 200-P/SP3

Datasheet200 A15 to 150 to 45 Â°CLA 200-P/SP4

Datasheet200 A12 to 15-25 to 85 Â°CLA 205-S

Datasheet
3D200 A15 to 12-10 to 85 °CLA 205-S/SP1

Datasheet200 A15 to 12-10 to 85 °CLA 205-S/SP21

Datasheet
3D300 A24 to 15-40 to 85 °CLA 205-S/SP33

Datasheet300 A15 to 15-40 to 70 °CLA 205-S/SP6

 

Datasheet
3D200 A15 to 12-40 to 85 °CLA 205-T/SP16

Datasheet
3D200 A24 to 15-25 to 75 °CLA 200-SD/SP3Datasheet
3D200 A24 to 24-30 to 70 °CLA 255-S

Datasheet
3D250 A18 to 12-10 to 85 °CLA 305-S

Datasheet
3D300 A15 to 12-10 to 85 °CLA 305-S/SP1

Datasheet500 A15 to 12-10 to 85 °CLA 305-S/SP19

Datasheet
3D500 A24 to 15-40 to 85 °CLA 305-S/SP4

 

Datasheet
3D300 A15 to 12-25 to 85 °CLA 305-S/SP5

Datasheet300 A15 to 12-10 to 85 °CLA 305-S/SP6

Datasheet
3D300 A24 to 15-25 to 85 °CLA 305-S/SP8

Datasheet
3D300 A15 to 12-40 to 85 °CLA 306-S

Datasheet
3D300 A15 to 15-40 to 85 °CLA 306-S/SP1

Datasheet400 A15 to 15-40 to 85 °CLA 306-S/SP4 Datasheet480 A15 to 15-40 to 70 °CLA 306-S/SP2

Datasheet300 A24 to 24-40 to 75 °CLA 200-SD/SP4 Datasheet
3D200 A24 to 24-40 to 85 °C LA sensors – ASK FOR SAMPLES / QUOTATIONS Looking to receive samples or a quotation? Please click on the contact button below and provide us with the information you need on this product series. Our sales team will get back to you shortly.

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