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Specifications
working temperature:
-40℃~+85℃
Current Range:
50A
Voltage - Supply:
-12V~15V
Band Width:
200kHz
Bidirectional Current Detection:
Support
Mfr. Part #:
LA55-P
Package:
Through Hole
Key Attributes
Model Number:
LA55-P
Product Description
Product Overview
The LEM LA 55-P is a closed-loop current transducer utilizing Hall effect technology for the electronic measurement of DC, AC, and pulsed currents. It offers galvanic isolation between the primary and secondary circuits and is designed for printed circuit board mounting. Key advantages include excellent accuracy, very good linearity, low temperature drift, optimized response time, and a wide frequency bandwidth, making it suitable for various industrial applications.
Product Attributes
- Brand: LEM
- Certifications: UL 94-V0, EN 50178, IEC 61010-1
Technical Specifications
| Parameter | Value | Notes |
| Product Name | LA 55-P | Current Transducer |
| Primary Nominal Current (IPN) | 50 A (rms) | |
| Primary Current Measuring Range (IPM) | 0 .. 70 A | |
| Secondary Nominal Current (ISN) | 50 mA (rms) | |
| Conversion Ratio (KN) | 1 : 1000 | |
| Supply Voltage (VC) | 12 .. 15 V ( 5 %) | |
| Current Consumption (IC) | 10 mA (@ 15 V) + IS | |
| Accuracy (@ IPN, TA = 25C, 15 V) | 0.65 % | |
| Accuracy - Dynamic Performance (@ 12..15 V) | 0.90 % | |
| Linearity Error (L) | < 0.15 % | Typ |
| Offset Current (IO) (@ IP = 0, TA = 25C) | 0.2 mA | |
| Magnetic Offset Current (IOM) (@ IP = 0, after 3x IPN overload) | 0.3 mA | 3) |
| Temperature Variation of IO | 0.1 .. 0.6 mA (-25C to +85C) / 0.2 .. 1.0 mA (-40C to -25C) | |
| Reaction Time (to 10% of IPN step) | < 500 ns | |
| Response Time (to 90% of IPN step) | < 1 s | |
| di/dt | > 200 A/s | Accurately followed |
| Frequency Bandwidth (- 1 dB) | DC .. 200 kHz | |
| Ambient Operating Temperature (TA) | - 40 .. + 85 C | |
| Ambient Storage Temperature (TS) | - 40 .. + 90 C | |
| Secondary Coil Resistance (RS) (@ TA = 70C / 85C) | 80 / 85 | |
| Mass | 18 g | |
| Isolation Test Voltage (Vd) | 2.5 kV (rms) | 50 Hz, 1 min |
| Impulse Withstand Voltage (Vw) | 5.7 kV | 1.2/50 s |
| Creepage Distance (dCp) | 5 mm | |
| Clearance Distance (dCI) | 5 mm | |
| Comparative Tracking Index (CTI) | 175 | Group IIIa |
| Rated Isolation Voltage (Single/Reinforced) | 500 V / 250 V | According to EN 50178 / IEC 61010-1 |
| Primary Through-hole Dimensions | 12.7 x 7 mm | |
| Secondary Connection | 3 pins (0.63 x 0.56 mm) | |
| Recommended PCB Hole | 0.9 mm | |
| General Tolerance | 0.2 mm |
2410121619_LEM-LA55-P_C454693.pdf
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