LEM LZSR 150-P LZSR Series Closed Loop Current Transducer
LEM LZSR 150-P Product Overview
The LZSR 150-P is a closed-loop Hall effect current transducer from LEM's LZSR Series, designed for the electronic measurement of DC, AC, and pulsed currents with galvanic isolation between the primary and secondary circuits. This PCB-mount transducer features an aperture for inserting primary conductors and is particularly adapted for 70-120kW solar inverters .
Rated for 150 A nominal with a peak measuring range of 270 A (up to 3 times the nominal value) , it outputs an instantaneous voltage signal of 2.5 ± 0.625 V with 0.83% accuracy and ±0.1% linearity . Response time is typically 3 µs and bandwidth is DC to 200 kHz . Supply voltage is +5 V DC (4.75 V to 5.25 V) . Sensitivity is 4.166 mV/A . Operating temperature ranges from -40°C to +85°C . The transducer features very low offset drift down to 3 ppm/K, significantly improved over previous generation Hall effect sensors .
LEM LZSR 150-P Key Specifications
|
Parameter |
Value |
|
Rated current (IPN) |
150 A |
|
Measuring range (IPM) |
±270 A (peak) |
|
Output signal |
Instantaneous voltage |
|
Output voltage value |
2.5 ± 0.625 V |
|
Supply voltage (VC) |
+5 V DC (4.75 to 5.25 V) |
|
Accuracy (X) |
0.83 % |
|
Linearity (EL) |
±0.1 % |
|
Sensitivity |
4.166 mV/A |
|
Response time (tr) |
3 µs (typical) |
|
Bandwidth (BW) |
DC to 200 kHz |
|
Offset drift |
3 ppm/K |
|
Operating temp (TA) |
-40°C to +85°C |
|
Mounting |
PCB (through-hole) |
|
Package dimensions |
37.75 × 48.2 × 19.4 mm |
LEM LZSR 150-P Key Advantages
The LZSR 150-P employs closed-loop Hall effect technology with ASIC signal conditioning, delivering 0.83% accuracy and ±0.1% linearity while providing galvanic isolation between primary and secondary circuits . The very low offset drift of 3 ppm/K ensures stable performance across a wide temperature range, outperforming traditional Hall effect sensors by up to 7 times . The 270 A peak measuring range accommodates high overload conditions up to three times the nominal value . The +5 V single supply simplifies system integration, while the internal reference voltage (VREF pin) and overcurrent detection output (threshold set at 1.93 × IPN) provide added functionality for protection applications . The compact PCB-mount design with aperture (37.75 × 48.2 × 19.4 mm) enables efficient space utilization in power electronics .
LEM LZSR 150-P Typical Applications
Solar inverters (70-120 kW)
AC variable speed and servo motor drives
Static converters for DC motor drives
Battery supplied applications
Uninterruptible Power Supplies (UPS)
Switched Mode Power Supplies (SMPS)
Power supplies for welding applications
Combiner box and MPPT systems
Why Choose the LEM LZSR 150-P?
The LZSR 150-P combines a 150 A rated current with 270 A peak measuring range and voltage output in a compact PCB-mount package with aperture for primary conductors. Manufactured by LEM, it delivers stable, accurate, and safe current measurement for solar inverter and industrial applications. The closed-loop Hall effect design with ASIC provides exceptional accuracy and very low offset drift, while the overcurrent detection output and reference access add valuable system-level functionality. The single +5 V supply and PCB mounting make it an ideal choice for high-density power electronics designs .
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