LA25-P LEM Current Sensor | Closed-Loop Hall Effect Technology, Accurate Measurement You Can Trust
In industrial automation and power electronics, the accuracy and reliability of current measurement directly impact system performance and safety. The LA25-P current sensor, from the world-renowned LEM company, employs advanced closed-loop Hall effect technology to deliver a high-performance current detection solution for your equipment.
Designed for electronic measurement of DC, AC, and pulse currents, the LA25-P provides galvanic isolation between the primary and secondary circuits, effectively protecting downstream electronics and ensuring system safety. Thanks to its optimized design and high-quality materials, the sensor offers a linearity error of ±0.15% and an accuracy of ±0.91%, eliminating concerns about data deviation in any application. With low temperature drift, it maintains stable performance across a wide temperature range of -25°C to +85°C, reliably operating in various industrial environments. Additionally, its excellent immunity to external interference ensures accurate readings even in complex electromagnetic conditions.
Primary nominal RMS current: 25 A
Primary current measuring range: 0 ~ ±55 A
Secondary nominal RMS current: 25 mA
Turns ratio: 1 : 1000
Supply voltage: ±12 … 15 V
Accuracy: ±0.95% to ±1.25% (depending on supply voltage)
Linearity error: < 0.15%
Electrical offset current: ±0.2 mA (TA = 25°C)
Magnetic offset current: ±0.3 mA (after 3x overload)
Temperature drift of offset: ±0.5 mA (0°C to 70°C), ±0.6 mA (-25°C to 85°C)
Delay time to 10% of final output: < 500 ns
Delay time to 90% of final output: < 1 μs
Frequency bandwidth (-1 dB): DC … 200 kHz
Ambient operating temperature: -25 … +85 °C
Ambient storage temperature: -40 … +90 °C
Secondary winding resistance: 80 Ω (TA = 70°C), 85 Ω (TA = 85°C)
Mass: 16 g
Standard: EN 50178: 1997
The LA25-P covers numerous industrial fields, especially suited for typical applications such as:
AC variable speed drives and servo motor drives – enabling precise closed-loop control and speed feedback
DC motor static converters – improving efficiency of DC drive systems
Battery powered equipment – accurately monitoring battery charge/discharge status
Uninterruptible Power Supplies (UPS) and Switch Mode Power Supplies (SMPS) – ensuring reliable power quality monitoring
Welding power supplies – enhancing visibility and safety in field operations
Various energy conversion systems – including solar, wind, and other new energy applications
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