LV25-P/SP11,LV 25-P/SP11

LV25-P/SP6 Product Description: High-Reliability Closed-Loop Voltage Sensing for Industrial Applications

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LV25-P/SP11 ‌Key Features‌
Closed-loop Hall effect technology based on magnetic flux balance ensures complete electrical isolation between primary and secondary circuits, delivering clean, noise-free output signals even in high-voltage and high-noise environments;
High-precision linear measurement with total error within ±0.9% and linearity better than 0.2%, accurately reproducing DC, AC, and pulsed voltage waveforms to meet the demanding requirements of dynamic control systems;
Wide voltage range adaptability via user-selectable external sampling resistor R1, enabling flexible configuration across 10 V to 1500 V without sensor replacement—single model, multiple voltage applications;
Superior EMI immunity achieved through differential amplification and magnetic circuit compensation, effectively suppressing common-mode interference and external electromagnetic fields in environments such as inverters and welding machines;
PCB surface-mount integrated design with primary-side 0.635×0.635 mm Faston terminals and secondary-side 3-pin plug connector, enabling direct soldering onto control boards to simplify wiring and enhance resistance to vibration and thermal cycling;
Industrial-grade reliability certification with UL94-V0 flame-retardant housing, ensuring long-term operational safety under harsh conditions including high temperature, humidity, and dust exposure.

LV25-P/SP11 ‌Technical Specifications‌

‌Rated primary current‌: 8 mA RMS (corresponding to 10–1500 V range, set by external R1 resistor)

‌Rated secondary output current‌: 25 mA RMS

‌Supply voltage range‌: ±12 V to ±15 V DC (bipolar supply)

‌Bandwidth‌: DC to 100 kHz

‌Isolation voltage‌: 2.5 kV AC (inferred from SP7 certification, compliant with EN50178 industrial safety standard)

‌Temperature drift‌: ±0.06 mA/°C (0–25°C), ±0.20 mA/°C (full range: -25°C to +70°C)

‌Operating temperature range‌: -25°C to +70°C

‌Package type‌: PCB surface-mount, primary: Faston terminals, secondary: 3-pin plug connector

‌Conversion ratio‌: 3118:1000 (primary current : secondary current)

‌Response time‌: <40 μs (inferred from SP7 performance, suitable for high-frequency transient capture)

‌Flammability rating‌: UL94-V0 engineering plastic housing, meeting fire safety requirements for high-safety equipment

LV25-P/SP11 ‌Applications‌
Deeply integrated into closed-loop feedback systems of high-power power electronics to deliver stable, precise voltage signals for critical control functions:

‌Photovoltaic and energy storage inverters‌: Real-time acquisition of 1000 V DC bus voltage to enhance MPPT tracking accuracy and grid-connected waveform quality, improving system efficiency and stability;

‌Battery management systems (BMS)‌: Suitable for single-cell or group voltage sampling in medium-to-high voltage battery packs, improving balancing precision and extending battery life while supporting state-of-health (SOH) prediction;

‌Variable frequency drives and servo controllers‌: Monitors DC bus voltage fluctuations to ensure smooth motor operation during acceleration, braking, and load transients, preventing overvoltage damage;

‌Uninterruptible power supplies (UPS)‌: Provides high-accuracy feedback for input/output voltage, enabling intelligent bypass switching, battery charge/discharge management, and fault prediction logic;

‌High-power welding machines‌: Delivers stable voltage signals under strong current surges and high-frequency noise, ensuring consistent and controllable welding performance;

‌Rail transit auxiliary power systems‌: Used in onboard DC/DC converters, braking resistor control, and auxiliary power supply feedback loops to enhance system reliability.

‌Why Choose LV25-P/SP11 This Model‌
As a global benchmark in industrial sensing, LEM has infused over four decades of closed-loop Hall technology expertise into the LV25-P/SP6, establishing it as the trusted standard for industrial voltage monitoring;
Compared to open-loop alternatives, this model offers ‌zero long-term drift, factory-calibrated accuracy, and zero maintenance requirements‌—significantly reducing total cost of ownership over the system lifecycle;
A single model covers the full 10–1500 V range via external resistor configuration, drastically reducing spare parts inventory complexity and streamlining procurement and supply chain logistics;