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Specifications
working temperature:
-40℃~+85℃
Current Range:
±300A
Voltage - Supply:
-15V~-12V;12V~15V
Band Width:
100kHz
Bidirectional Current Detection:
Support
Mfr. Part #:
LA125-P
Package:
Through Hole
Key Attributes
Model Number:
LA125-P
Product Description
Product Overview
The LEM LA 125-P/SP4 is a closed-loop Hall effect current transducer designed for the electronic measurement of DC, AC, and pulsed currents with galvanic separation between primary and secondary circuits. It offers excellent accuracy, linearity, low temperature drift, and a wide frequency bandwidth, making it suitable for demanding applications in AC variable speed drives, servo motor drives, static converters, UPS, SMPS, and welding power supplies, particularly in the traction domain.
Product Attributes
- Brand: LEM
- Certifications: UL 94-V0, EN 50155:1995
- Material: Insulating plastic case
Technical Specifications
| Specification | Value | Notes |
| Primary Nominal Current (IPN) | 125 A (rms) | |
| Primary Current Measuring Range (IPM) | 0 .. 300 A | |
| Secondary Nominal Current (ISN) | 62.5 mA (rms) | |
| Conversion Ratio (KN) | 1 : 2000 | |
| Supply Voltage (UC) | 12 .. 15 V ( 5 %) | |
| Current Consumption (IC) | 16 mA (@ 15 V) + IS | |
| Accuracy @ IPN, TA = 25 C | 0.60 % (@ 15 V) / 0.80 % (@ 12 .. 15 V) | |
| Linearity Error (L) | < 0.15 % | Typ |
| Offset Current (IO) @ IP = 0, TA = 25 C | 0.20 mA | |
| Magnetic Offset Current (IOM) | 0.25 mA | After 3 x IPN overload |
| Temperature Variation of IO | 0.20 .. 0.50 mA (-25C to +85C) / 0.30 .. 0.80 mA (-40C to -25C) | |
| Reaction Time (tra) | < 500 ns | |
| Step Response Time (tr) to 90% | < 1 s | |
| di/dt Accurately Followed | > 200 A/s | |
| Frequency Bandwidth (BW) (-1 dB) | DC .. 100 kHz | |
| Ambient Operating Temperature (TA) | - 40 .. + 85 C | |
| Ambient Storage Temperature (TS) | - 45 .. + 100 C | |
| Secondary Coil Resistance (RS) | 76 (@ TA = 70 C) / 80 (@ TA = 85 C) | |
| Mass | 55 g | |
| Isolation Test Voltage (Ud) | 4.5 kV rms / 8.4 kV (1) rms | 50 Hz, 1 min |
| Creepage Distance (dCp) | 8.8 mm | |
| Clearance (dCI) | 8.8 mm | |
| Comparative Tracking Index (CTI) | 175 | Group IIIa |
| Primary Through-hole | 17 4.5 mm or 13 11 mm | |
| Secondary Connection | 4 pins 0.63 x 0.56 mm | Recommended PCB hole 0.9 mm |
| Supplementary Fastening | 2 holes 1.75 mm | Recommended PCB hole 2.4 mm |
2410121608_LEM-LA125-P_C453478.pdf
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