1. One-Sentence Description
LF 2005-S is a closed-loop compensated current sensor using Hall effect technology, supporting DC/AC/pulse current measurement (0~3000A), with electrical isolation and wide-frequency dynamic response characteristics, suitable for industrial drives and power electronics systems.
2. Core Features
- Closed-loop Hall architecture: Achieves high-precision measurement through the magnetic balance principle, eliminating nonlinear errors.
- Wide measurement range: Nominal current 2000A, measurable range 0~±3000A (±24V power supply).
- Strong isolation performance: Withstands 6kV AC (50Hz/1min) voltage, creepage distance 29.1mm, compliant with UL 94-V0 flame retardant standard.
- Ultra-low temperature drift: Offset current temperature drift ±0.2mA/℃, linearity error <0.1% (typical value).
- High-speed response: Step response <1μs, bandwidth DC~100kHz (-1dB), capable of capturing fast transient signals.
- Anti-interference design: Electromagnetic shielding structure suppresses external noise interference.
3. Core Technical Specifications
| Category | Parameter | Typical Value/Range |
| Electrical Performance | Primary Rated Current (IPN) | 2000A rms |
| Transformation Ratio (KN) | 1:5000 | |
| Sensitivity (V/A) | 13.28mV/A (@±24V) | |
| Accuracy Index | Linearity Error | ≤0.3% |
| Temperature Drift (Offset Current) | ±0.2mA/℃ | |
| Dynamic Characteristics | Response Time | <1μs (90% @1A step) |
| Overload Capacity | 3 times rated current for 3s | |
| Isolation Characteristics | Rated Insulation Voltage | 6kV AC (50Hz/1min) |
| Creepage Distance/Clearance Distance | 29.1mm/27.1mm |
4. The Story Behind the Chip
LF 2005-S is based on the Hall effect closed-loop detection principle, forming a dynamic balance loop through a magnetic core and compensation coil to convert the primary side large current into a secondary side low-impedance voltage signal. Its design integrates a UL-certified high-voltage-resistant plastic casing and multi-layer circuit board technology to ensure long-term stable operation in harsh industrial environments. This product is specifically designed to replace traditional shunt resistors, addressing issues of high insertion loss and insufficient frequency response, making it a core sensor component in the new energy and automation fields.
5. Design Philosophy
- Ultimate precision-oriented: Optimizes the linearity of Hall elements through precision photolithography technology, combined with digital calibration technology to enhance long-term stability.
- Safety redundancy design: Dual insulation and high-voltage-resistant packaging meet industrial safety standards, reducing the risk of electric shock.
- Modular compatibility: Standardized pin definitions and compact size (60.5×20.5mm) are compatible with mainstream drivers and control boards.
6. Application Scenarios
- Motor drive control: Phase current sampling for inverters and servo systems.
- Energy management: Input/output current monitoring for UPS and photovoltaic inverters.
- Industrial power supplies: Overcurrent protection and energy efficiency optimization for welding equipment and electroplating systems.
- New energy field: Real-time current detection for electric vehicle charging piles.
7. Unique Advantages
- Zero insertion loss: The secondary circuit requires no power supply, and there is no additional voltage drop in the primary current.
- Wide-frequency dynamic response: Supports current change rate tracking up to 50A/μs, suitable for high-frequency switching scenarios.
- Anti-saturation design: Primary side through-hole size 57mm×20.5mm, compatible with multi-strand cables or busbar installations.
8. What Engineers Must Know for Selection
- Power supply voltage matching: Select within the range of ±15V~±24V, with ±24V recommended to achieve maximum sensitivity (13.28mV/A).
- Environmental temperature limits: Operating temperature -40~+85℃, storage temperature -50~+90℃, derating is required at high temperatures.
- Installation specifications: The primary conductor should pass vertically through the center hole to avoid adjacent magnetic field interference.
- Safety isolation requirements: Comply with EN 50178 standards to ensure creepage distance ≥29.1mm.
Conclusion: LF 2005-S takes high precision, wide frequency domain, and strong isolation as its core advantages, making it an ideal choice for current detection in industrial automation and power electronics systems. Engineers need to focus on power supply matching, environmental adaptability, and installation specifications to fully unleash its performance potential.
If a more cost-effective alternative solution is needed, please feel free to contact us. We will recommend more cost-effective domestic alternative materials to help small and medium-sized technology enterprises avoid risks such as unstable supply and high production costs during mass production of new products, thereby achieving more stable production and forming market competitive advantages.
Contact:
Sylvia Xu | ECSource Components Co.,Limited
Top 10 Test Laboratory Distributors in Asia.
D-U-N-S Number:655918890 | ISO90001 Certificated Company
Phone/Whatsapp: 0086-19806586673
Email:sylvia@ecsource.net
Line Card : FPGA, RF, MEMORY,CONNECTOR,Power
