CAS 6-NP
6A rated closed-loop Hall effect current transducer with high accuracy (0.5%) for precision measurement applications
Product Overview
Description
The CAS 6-NP is a high-performance closed-loop Hall effect current transducer designed for applications requiring precise current measurement. With its 0.5% accuracy, fast 1μs response time, and 200kHz bandwidth, it delivers exceptional performance for demanding industrial and test applications.
Utilizing closed-loop Hall effect technology with magnetic flux compensation, the CAS series achieves superior linearity and temperature stability compared to open-loop alternatives. The sensor provides 3kV isolation voltage and operates from -40°C to +85°C, ensuring reliable operation in industrial environments.
The CAS 6-NP features a compact design with panel mounting capability and is available with current output (4-20mA or 0-20mA) or voltage output configurations. It is ideal for applications such as precision motor control, power analyzers, medical equipment, and test and measurement systems.
Product Series
CAS
Primary Application
Current Transducers
Key Features
- High efficiency and reliability
- Optimized for industrial applications
- Comprehensive technical support
- Available from stock
Specifications
| Rated Current | 6A |
|---|---|
| Measurement Range | ±18A |
| Supply Voltage | ±12V to ±15V |
| Output Type | Current or Voltage |
| Accuracy | ±0.5% |
| Response Time | < 1 μs |
| Bandwidth | 200 kHz |
| Isolation Voltage | 3 kV |
| Operating Temperature | -40°C to +85°C |
Applications
Motor Drives
Variable frequency drives and servo motor controls
Power Supplies
SMPS, UPS, and industrial power systems
Renewable Energy
Solar inverters and wind turbine converters
EV Charging
Electric vehicle charging stations
FAE Expert Insights
"CAS 6-NP is an excellent choice for industrial applications."
— Field Application Engineer, BeiLuo
Frequently Asked Questions
Why choose closed-loop over open-loop for the CAS 6-NP?
The closed-loop design of CAS 6-NP provides several advantages: 1) Superior accuracy - 0.5% vs 1-2% for open-loop; 2) Better linearity - 0.1% typical vs 1% for open-loop; 3) Lower temperature drift - compensated by feedback mechanism; 4) Faster response time - <1μs vs 3-5μs; 5) Higher bandwidth - 200kHz vs 100kHz; 6) No magnetic offset - flux is continuously nulled. These benefits make closed-loop sensors essential for precision applications like servo drives, power analyzers, and medical equipment where measurement accuracy directly impacts system performance.
Choose CAS 6-NP when accuracy better than 1% is required, or when measuring dynamic currents with fast transients. For static or slowly varying currents where 1-2% accuracy is acceptable, consider HLSR series for cost savings.
What is the difference between CAS 6-NP and CASR 6-NP?
The CAS and CASR series are similar closed-loop current transducers with slightly different specifications. CASR (R for Reduced) models typically offer a more compact form factor and may have slightly different electrical characteristics. The CAS 6-NP is the standard version with full performance specifications, while CASR variants may be optimized for specific applications or mounting configurations. Both series provide the same 0.5% accuracy and closed-loop performance. When selecting between them, consider mechanical fit, supply voltage requirements, and specific application needs. Our FAE team can help determine the best variant for your design.
CAS series is the standard choice for most applications. CASR series should be considered when space is extremely limited or when specific mounting constraints require the reduced form factor. Both offer identical electrical performance.
How does the dual supply voltage work for CAS 6-NP?
The CAS 6-NP requires dual supply voltages (±12V to ±15V) to power the internal compensation circuitry. The positive supply (+Vs) powers the output stage and Hall element, while the negative supply (-Vs) enables bidirectional current flow in the compensation coil. This dual supply configuration allows the sensor to accurately measure both positive and negative currents while maintaining fast response. When designing the power supply, ensure both rails are well-regulated and decoupled with capacitors close to the sensor pins. Some applications may require DC-DC converters to generate the negative supply from a single positive supply.
Design your power supply to provide stable ±12V or ±15V rails. Use linear regulators for lowest noise, or switching regulators with adequate filtering. Place 100nF ceramic capacitors close to both supply pins for decoupling.