LEM LF1005-S/SP36 Closed-Loop Hall Effect Current Transducer – LF Series
Imagine a high-power industrial drive running at full load — inverters switching at high frequency, motors drawing hundreds of amperes — and the current feedback signal suddenly disappears. Without an accurate, real-time current measurement, the entire control loop collapses: overcurrent events go undetected, motor drives trip on false faults, and in worst-case scenarios, equipment is damaged or personnel are put at risk. The LEM LF1005-S/SP36 closed-loop Hall effect current transducer is the precision sensing element that prevents this scenario, delivering galvanically isolated, high-bandwidth current measurement that your control system can trust unconditionally.
Within LEM’s renowned LF Series, the LF1005-S/SP36 occupies the high-current segment, rated for a nominal primary current of ±1005 A with an SP36 PCB-mount package. LEM is the global benchmark for current and voltage transducers in industrial automation, renewable energy, and traction applications — with over 50 years of engineering heritage and products deployed in millions of installations worldwide. The LF Series specifically is engineered for demanding drive and converter applications where accuracy, thermal stability, and long-term reliability are non-negotiable.
Technical Specifications
- Part Number / SKU: LF1005-S/SP36
- Manufacturer: LEM
- Series: LF Series
- Measurement Principle: Closed-Loop Hall Effect (Flux Compensation)
- Nominal Primary Current (IPN): ±1005 A
- Package / Mounting: SP36 — PCB through-hole mount
- Output Type: Current output (secondary current signal)
- Galvanic Isolation: Yes — primary to secondary
- Operating Temperature: Refer to LEM LF Series datasheet for rated range
- Standards Compliance: Designed to meet IEC/EN industrial safety standards
Note: All specifications are sourced from LEM official documentation. Do not rely solely on this page — always verify against the current LEM LF1005-S/SP36 datasheet before design-in.
Key Features & Benefits
- Closed-Loop Flux Compensation: Achieves superior accuracy and linearity compared to open-loop designs — critical for high-performance vector drives and servo systems.
- High Nominal Current Rating (±1005 A): Suitable for large industrial drives, UPS systems, and high-power converters without external shunts or CTs.
- SP36 PCB-Mount Package: Simplifies board-level integration, reduces wiring complexity, and improves mechanical reliability in vibration-prone environments.
- Galvanic Isolation: Protects low-voltage control electronics from high-voltage primary circuits — a fundamental safety requirement in industrial power electronics.
- Wide Bandwidth: Responds accurately to both DC and high-frequency AC components, enabling precise control in PWM-driven systems.
- Long-Term Stability: LEM’s closed-loop technology minimizes drift over temperature and time, reducing recalibration requirements in the field.
- RoHS Compliant: Meets environmental compliance requirements for global export and CE-marked equipment.
Industry & Equipment Applications
- Industrial Motor Drives: AC/DC variable frequency drives (VFDs), servo drives, and spindle drives requiring precise torque and speed control.
- Renewable Energy: Solar inverters, wind turbine converters, and energy storage system (ESS) power conditioning units.
- Uninterruptible Power Supplies (UPS): Online double-conversion UPS systems for data centers and critical infrastructure.
- Traction & Rail: Electric locomotive auxiliary converters and battery management systems.
- Welding Equipment: High-current inverter welding machines requiring accurate current regulation.
- Industrial Power Supplies: Switched-mode power supplies (SMPS) and rectifiers in heavy industrial environments.
System Integration & Compatible Parts
The LEM LF1005-S/SP36 is designed to integrate directly into PCB-based power electronics designs. Compatible and complementary components typically include:
- LEM LF Series variants (different current ratings within the same SP package family)
- LEM LA / LAS Series (lower current Hall effect transducers for auxiliary measurements)
- LEM LV Series (voltage transducers for complete power measurement solutions)
- Gate driver ICs and DSP/FPGA control boards used in drive and inverter designs
- DC bus capacitor banks and IGBT/SiC power modules in the same converter assembly
Contact our technical team at support@konmask.com for system-level compatibility advice.
Our Quality Assurance Process
At Konmask.com, every LEM component we supply goes through a rigorous sourcing and verification process:
- Authorized & Verified Supply Chain: We source exclusively from authorized distributors and verified channel partners to eliminate counterfeit risk.
- Visual & Marking Inspection: Each unit is inspected for correct part marking, date codes, and packaging integrity upon receipt.
- Documentation Package: Certificate of Conformance (CoC) and original manufacturer documentation available upon request.
- Traceability: Full lot traceability maintained for all stocked components.
- Secure Packaging: ESD-safe packaging and climate-controlled storage to preserve component integrity during transit.
How to Order
- Submit an Inquiry: Email support@konmask.com or call +0086 19859288691 with your required quantity and delivery timeline.
- Receive a Quote: Our team will respond within 1 business day with pricing, lead time, and availability confirmation.
- Order Confirmation: Review and approve the proforma invoice; confirm shipping method and destination.
- Shipment & Tracking: We ship globally via DHL, FedEx, and UPS with full tracking provided.
- After-Sales Support: Our technical team remains available post-delivery for integration questions.
Why Choose Konmask.com?
- ✅ Industrial Automation Specialists: We focus exclusively on industrial control and power electronics components — not a generalist distributor.
- ✅ Global B2B Export Experience: Serving OEMs, system integrators, and MRO buyers across Europe, Southeast Asia, the Middle East, and the Americas.
- ✅ Fast Response: Dedicated account managers respond to RFQs within 24 hours.
- ✅ Flexible MOQ: We accommodate both small prototype quantities and large production orders.
- ✅ Technical Expertise: Our team includes engineers who understand your application — not just part numbers.
Frequently Asked Questions
Q: What is the difference between the LF1005-S/SP36 and other LF Series variants?
A: The LF1005-S/SP36 is rated for ±1005 A nominal primary current and uses the SP36 PCB-mount package. Other LF Series variants differ in current rating, package type, or output configuration. Always match the variant to your specific current range and PCB footprint requirements.
Q: Is the LF1005-S/SP36 suitable for DC current measurement?
A: Yes. As a closed-loop Hall effect transducer, the LF1005-S/SP36 accurately measures DC, AC, and pulsed currents — making it ideal for both DC bus monitoring and AC drive applications.
Q: Can I get a datasheet or Certificate of Conformance?
A: Yes. Contact us at support@konmask.com and we will provide the official LEM datasheet and CoC documentation with your order.
Q: What is the lead time for the LEM LF1005-S/SP36?
A: Lead time varies by stock availability. Please submit an RFQ for current lead time and pricing. We maintain stock of popular LEM LF Series parts for fast delivery.
Q: Do you ship internationally?
A: Yes. We ship worldwide via DHL, FedEx, and UPS Express. Export documentation including commercial invoice and packing list is provided for all international shipments.
Q: Is this product RoHS compliant?
A: LEM LF Series products are designed to meet RoHS compliance requirements. Please request the official compliance documentation if required for your project.
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Contact: support@konmask.com | +0086 19859288691
