| Image | Part Number | Description / PDF | Quantity | Rfq |
|---|---|---|---|---|
 |
LEM USA, Inc. |
SENSOR CURRENT XFMR 50A AC |
0 |
|
 |
LEM USA, Inc. |
CURRENT TRANSDUCER INTGRATED PRI |
996 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT 12.5A, 25A, 50A |
0 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT HALL 300A AC/DC |
12 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT HALL 5A AC/DC |
555 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT HALL 25A UNIPOLAR |
131 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT HALL 100A AC/DC |
386 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT HALL 20A AC/DC |
100 |
|
 |
LEM USA, Inc. |
CUR TRANSDUCER, CLO LOOP,2000a |
0 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT HALL 500A AC/DC |
0 |
|
 |
LEM USA, Inc. |
CURRENT TRANSDUCER INTEGRATED PR |
2522 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT HALL 100A AC/DC |
0 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT HALL 25A AC/DC |
120 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT HALL 50A AC/DC |
10 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT HALL 1000A AC/DC |
0 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT HALL 500A AC/DC |
0 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT HALL 130A AC/DC |
87 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT HALL 15A AC/DC |
131 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT HALL 125A AC/DC |
113 |
|
 |
LEM USA, Inc. |
SENSOR CURRENT HALL 40A AC/DC |
23 |
|
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.