LT - Current Sensors
The LT Series current sensors are closed‑loop Hall‑effect transducers designed for accurate current measurement in railway traction and industrial applications. They are recognized for their excellent accuracy, fast response times, and robust mechanical design, making them suitable for demanding environments where precise current monitoring is required.
The LT 100 are specifically developed for traction and railway applications. These compact current sensors operate with a dual power supply ranging from ±12 V to ±18 V and are designed for panel mounting. Featuring a 15 mm aperture for the primary conductor, LT 100 sensors combine high accuracy with good dynamic response, making them well suited for onboard and traction‑related systems.
The remaining LT models, LT 505 / LT 1005 / LT 2005, LT 4000, and LT 10000, are intended for industrial applications. These panel‑mount current sensors cover a wide range of primary conductor sizes, from 40.5 mm up to 200 mm aperture diameters, and operate with dual power supplies ranging from ±15 V up to ±60 V, depending on the model. Their closed‑loop Hall‑effect technology ensures reliable performance, high precision, and fast response across a broad range of industrial use cases.
Across the entire LT Series, the combination of closed‑loop architecture, panel‑mount design, and optimized electrical performance delivers dependable current measurement solutions for both traction and industrial systems.
LT – Features and benefits
Main characteristics
- Closed‑loop (compensated) Hall‑effect current sensors
- Galvanic isolation between primary and secondary circuits
- Insulating plastic case recognized according to UL 94‑V0 (depending on model)
- Panel‑mount installation across the entire LT Series
- Designed for high‑power current measurement in demanding environments
Benefits
- Excellent accuracy
- Very good linearity
- Low temperature drift
- Optimized response or delay time, depending on the model
- Wide frequency bandwidth
- No insertion losses
- High immunity to external magnetic interference
- Current overload capability
Typical applications
Railway applications
(Only for LT 100)
LT 100 current sensors are widely used in the railway sector, both in fixed installations and onboard systems for trains, locomotives, and metro vehicles:
These railway applications include:
- Single or three phase inverters
- Propulsion and braking choppers
- Propulsion converters
- Auxiliary converters
- Battery chargers
Industrial applications
(LT 505 / 1005 / 2005, LT 4000, LT 10000)
These LT current sensors are extensively employed in industrial power‑electronics applications:
- AC variable speed drives & 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
LEM LT – Download & Technical Characteristic
| Product | Check stock | Document | Primary nominal RMS current | Supply Voltage range | Op. Temperature |
|---|---|---|---|---|---|
| LT 100-S/SP30 | Datasheet 3D | 100 A | 12 to 18 | -40 to 70 °C | |
| LT 100-S/SP37 | 100 A | 12 to 18 | -45 to 100 °C | ||
| LT 100-S/SP63 | 100 A | 12 to 18 | -30 to 70 °C | ||
| LT 100-T/SP63 | 100 A | 12 to 18 | -30 to 70 °C | ||
| LT 505-S | Datasheet 3D | 500 A | 15 to 24 | -10 to 85 °C | |
| LT 505-S/SP10 | 500 A | 12 to 24 | -10 to 85 °C | ||
| LT 505-S/SP22 | 500 A | 15 to 24 | -40 to 85 °C | ||
| LT 505-S/SP24 | 500 A | 15 to 15 | -25 to 85 °C | ||
| LT 505-S/SP34 | 500 A | 15 to 24 | -40 to 70 °C | ||
| LT 505-T | Datasheet 3D | 500 A | 15 to 24 | -10 to 85 °C | |
| LT 505-S/SP4 | Datasheet | 720 A | 15 to 24 | -40 to 80 °C | |
| LT 505-S/SP5 | Datasheet 3D | 720 A | 24 to 24 | -40 to 80 °C | |
| LT 505-S/SP8 | 720 A | 15 to 15 | -40 to 70 °C | ||
| LT 505-T/SP12 | Datasheet 3D | 800 A | 15 to 15 | -40 to 85 °C | |
| LT 1005-S | Datasheet 3D | 1000 A | 15 to 24 | -10 to 85 °C | |
| LT 1005-S/SP1 | Datasheet | 1000 A | 24 to 24 | -25 to 70 °C | |
| LT 1005-S/SP10 | 1000 A | 15 to 15 | -10 to 70 °C | ||
| LT 1005-S/SP19 | Datasheet 3D | 1000 A | 15 to 24 | -40 to 85 °C | |
| LT 1005-S/SP22 | 1000 A | 15 to 24 | -40 to 70 °C | ||
| LT 1005-S/SP26 | Datasheet | 1000 A | 24 to 24 | -40 to 85 °C | |
| LT 1005-S/SP28 | Datasheet 3D | 1000 A | 15 to 24 | -40 to 85 °C | |
| LT 1005-S/SP29 | Datasheet | 1000 A | 15 to 24 | -40 to 85 °C | |
| LT 1005-S/SP3 | Datasheet 3D | 1000 A | 15 to 15 | -25 to 70 °C | |
| LT 1005-S/SP30 | Datasheet | 1000 A | 15 to 24 | -40 to 85 °C | |
| LT 1005-S/SP31 | 1000 A | 15 to 15 | -40 to 85 °C | ||
| LT 1005-S/SP33 | 1000 A | 24 to 24 | -25 to 70 °C | ||
| LT 1005-S/SP4 | Datasheet | 1000 A | 15 to 24 | -40 to 85 °C | |
| LT 1005-S/SP41 | 1000 A | 15 to 24 | -40 to 85 °C | ||
| LT 1005-S/SP8 | 1000 A | 24 to 24 | -25 to 70 °C | ||
| LT 1005-T | Datasheet 3D | 1000 A | 15 to 24 | -10 to 85 °C | |
| LT 1005-T/SP3 | Datasheet | 1000 A | 15 to 15 | -25 to 70 °C | |
| LT 1005-T/SP4 | Datasheet | 1000 A | 15 to 24 | -40 to 85 °C | |
| LT 2000-S/SP45 | 2000 A | 24 to 24 | -40 to 70 °C | ||
| LT 2005-S/SP3 | Datasheet 3D | 1100 A | 15 to 15 | -30 to 70 °C | |
| LT 2005-S | Datasheet 3D | 2000 A | 15 to 24 | 0 to 70 °C | |
| LT 2005-S/SP12 | Datasheet 3D | 2000 A | 15 to 24 | -25 to 70 °C | |
| LT 2005-S/SP15 | Datasheet 3D | 2000 A | 24 to 24 | -25 to 70 °C | |
| LT 2005-S/SP2 | Datasheet 3D | 2000 A | 15 to 24 | -40 to 70 °C | |
| LT 2005-T | Datasheet | 2000 A | 15 to 24 | 0 to 70 °C | |
| LT 2005-T/SP2 | Datasheet 3D | 2000 A | 15 to 24 | -40 to 70 °C | |
| LT 2005-T/SP22 | Datasheet | 2000 A | 24 to 24 | -25 to 70 °C | |
| LT 2005-T/SP6 | 2000 A | 24 to 24 | -25 to 70 °C | ||
| LT 4000-S | Datasheet 3D | 4000 A | 24 to 24 | -25 to 70 °C | |
| LT 4000-S/SP12 | 4000 A | 24 to 24 | -40 to 70 °C | ||
| LT 4000-S/SP22 | 4000 A | 24 to 24 | -25 to 70 °C | ||
| LT 4000-S/SP32 | 4000 A | 24 to 24 | 0 to 50 °C | ||
| LT 4000-S/SP34 | Datasheet 3D | 4000 A | 24 to 24 | -40 to 70 °C | |
| LT 4000-S/SP35 | Datasheet 3D | 4000 A | 24 to 24 | -40 to 70 °C | |
| LT 4000-S/SP43 | 4000 A | 24 to 24 | -40 to 85 °C | ||
| LT 4000-S/SP44 | 3300 A | 24 to 24 | -25 to 70 °C | ||
| LT 4000-S/SP45 | 4400 A | 60 to 60 | -25 to 50 °C | ||
| LT 4000-T | Datasheet 3D | 4000 A | 24 to 24 | -25 to 70 °C | |
| LT 4000-T/SP11 | 4000 A | 24 to 24 | -40 to 70 °C | ||
| LT 4000-T/SP35 | 4000 A | 24 to 24 | -40 to 70 °C | ||
| LT 4000-T/SP37 | 4000 A | 24 to 24 | -25 to 70 °C | ||
| LT 4000-T/SP40 | 4000 A | 24 to 24 | -40 to 85 °C | ||
| LT 10000-S | Datasheet 3D | 10000 A | 60 to 48 | -25 to 70 °C |
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