LESR Series
A smart alternative to Fluxgate technology, combining high‑accuracy current measurement with outstanding cost efficiency.
LESR – Current sensors
The LESR Series extends the LES Series by adding reference voltage access, enabling enhanced signal conditioning and greater flexibility at system level. These current sensors are dedicated to the precise measurement of DC, AC, and pulsed small currents, with nominal values typically spanning 6A to 50A.
Featuring an integrated primary conductor, low offset drift, and stable operation from -40 °C to +105 °C, the LESR Series is well suited for industrial designs requiring fine current resolution and external reference management. Its closed‑loop Hall‑effect architecture delivers performance comparable to Fluxgate technology, without the associated complexity or cost.
LESR – Features & Benefits
Main characteristics
- Closed loop multi-range current transducer
- Voltage output
- Unipolar supply voltage
- Compact design for PCB mounting
- Cost attractive
- PCB mounting in various footprints (3 or 4 primary pins with various layouts)
- With integrated primary conductors
- Compact design
- High overall accuracy at +105°C up to 2%
Benefits
- Very low offset drift
- Very good dv/dt immunity
- Fast response time <0.4 µs
- CASR footprint compatible
- Reference pin with two modes: Ref IN and Ref OUT
- Extended measuring range for unipolar measurement
Typical applications
LESR products are tailored for industrial use and fulfill a wide range of functions across different applications.
- 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
- Solar inverters
LEM LESR – Download & Technical Characteristic
| Product | Check stock | Document | Nominal value | Secondary Nominal Signal Value | Op. Temperature |
|---|---|---|---|---|---|
| LESR 6-NP | Datasheet 3D | 6 A | 2.5 +/- 0.625 V | -40 to 105 °C | |
| LESR 6-NP/SP1 | Datasheet 3D | 6 A | 2.5 +/- 0.625 V | -40 to 105 °C | |
| LESR 15-NP | Datasheet 3D | 15 A | 2.5 +/- 0.625 V | -40 to 105 °C | |
| LESR 15-NP/SP1 | Datasheet 3D | 15 A | 2.5 +/- 0.625 V | -40 to 105 °C | |
| LESR 25-NP | Datasheet 3D | 25 A | 2.5 +/- 0.625 V | -40 to 105 °C | |
| LESR 25-NP/SP1 | Datasheet 3D | 25 A | 2.5 +/- 0.625 V | -40 to 105 °C | |
| LESR 50-NP | Datasheet 3D | 50 A | 2.5 +/- 0.625 V | -40 to 85°C | |
| LESR 50-NP/SP1 | Datasheet 3D | 50 A | 2.5 +/- 0.625 V | -40 to 85°C |
LESR Sensors – ASK FOR SAMPLES / QUOTATIONS
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