| Image | Part Number | Description / PDF | Quantity | Rfq |
|---|---|---|---|---|
 |
LEM USA, Inc. |
200A 3.3V OL BUS BAR MOUNT |
32 |
|
|
LEM USA, Inc. |
400A 5V OL BUS BAR MOUNT |
35 |
|
|
LEM USA, Inc. |
560A 3.3V OL BUS BAR MOUNT |
40 |
|
|
LEM USA, Inc. |
SENSOR CURRENT HALL 2.5A AC/DC |
0 |
|
|
LEM USA, Inc. |
SURFACT MT, 30A SENSOR WITH HIGH |
690 |
|
|
LEM USA, Inc. |
200A OPEN LOOP BUS BAR MOUNT |
0 |
|
|
LEM USA, Inc. |
SENSOR CURRENT HALL 2000A AC/DC |
0 |
|
|
LEM USA, Inc. |
SENSOR CURRENT HALL 1200A AC/DC |
0 |
|
|
LEM USA, Inc. |
DIGITAL OUTPUT OL PCB MT 80A |
100 |
|
|
LEM USA, Inc. |
560A OPEN LOOP BAR BAR MOUNT |
0 |
|
|
LEM USA, Inc. |
DIGITAL OUTPUT OL PANEL MT 250A |
100 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT FLUX 200MA AC/DC |
0 |
|
 |
LEM USA, Inc. |
CURRENT TRANSDUCER KIT |
0 |
|
 |
LEM USA, Inc. |
CURRENT TRANSDUCER KIT |
0 |
|
 |
LEM USA, Inc. |
CURRENT TRANSDUCER KIT |
0 |
|
 |
LEM USA, Inc. |
INTEGRATED PRIMARY 20A O/L |
0 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT FLUX 200MA AC/DC |
0 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT FLUX 600MA AC/DC |
0 |
|
 |
LEM USA, Inc. |
CURRENT TRANSDUCER KIT |
0 |
|
 |
LEM USA, Inc. |
CURRENT TRANSDUCER KIT |
0 |
|
Current sensors are transducers that measure electric current flow in conductors and convert it into proportional electrical signals. They play critical roles in energy management, motor control, power quality monitoring, and system protection across industries. Modern applications demand high accuracy, galvanic isolation, and fast response times for optimizing efficiency in electrified systems.
| Type | Functional Characteristics | Application Examples |
|---|---|---|
| Shunt Resistor | Low cost, inline measurement, direct current conversion via Ohm's law | Power supplies, battery management systems |
| Hall Effect | Galvanic isolation, DC/AC measurement, moderate bandwidth | Automotive traction inverters, industrial motor drives |
| Current Transformer | High-voltage isolation, AC-only operation, high accuracy | Grid metering, circuit breaker protection |
| Rogowski Coil | Flexible coreless design, fast transient response, requires integrator | Pulsed power systems, fault current detection |
| Optical Current Sensor | Immune to EMI, high precision, complex signal processing | Smart grids, high-voltage substations |
Typical current sensors contain: 1) Sensing element (shunt resistor, Hall chip, magnetic core) 2) Signal conditioning circuitry (amplifiers, filters) 3) Isolation barrier (if applicable) 4) Output interface (analog voltage/current, digital protocols). High-performance models integrate temperature compensation and digital calibration features.
| Parameter | Description | Importance |
|---|---|---|
| Measurement Range | Maximum current capacity (e.g., 500A) | Determines application suitability |
| Accuracy Class | Error tolerance (e.g., 0.5%) | System control reliability |
| Bandwidth | Frequency response (DC-100kHz) | Dynamic performance capability |
| Isolation Voltage | Dielectric withstand rating (e.g., 3kV) | Electrical safety compliance |
| Response Time | Signal output delay ( s-ms range) | Protection system effectiveness |
Key industries include: Renewable energy (solar inverters, wind turbines), Automotive (EV battery management, 48V systems), Industrial automation (CNC machines, robotics), Consumer electronics (smart meters), Aerospace (actuator monitoring). Typical equipment: Variable frequency drives, uninterruptible power supplies, charging stations.
| Manufacturer | Product Series | Key Features |
|---|---|---|
| LEM SA | HASS & LTSR Series | Open-loop Hall effect with ASIC processing |
| Allegro Micro | ACS758/ACS3761x | Galvanically isolated Hall ICs |
| Honeywell | CSP-VA/CSNP Series | Current transformers for grid applications |
| TT Electronics | Pulse Series | High-precision shunt resistors |
| ACR Systems | Rogowski Coil Models | Flexible aperture AC measurement |
Key considerations: 1) Required measurement range vs peak currents 2) DC/AC signal type compatibility 3) Isolation requirements 4) Environmental conditions (temperature, vibration) 5) Cost vs performance trade-offs. Example: For EV battery management, select Hall-effect sensors with 200A range, 1% accuracy, and automotive qualification.
Emerging trends include: 1) Integration with IoT for predictive maintenance 2) Wide bandgap semiconductor-based sensors 3) Increased adoption of closed-loop Hall sensors for EV applications 4) MEMS-based miniaturized current monitoring 5) AI-enhanced signal processing for harmonic analysis. The market is projected to grow at 7.2% CAGR through 2030 driven by electrification demands.