CQ330F

Current Sensors Overview

The CQ330F is a discontinued current sensor manufactured by Asahi Kasei Microdevices/AKM. It utilizes open-loop Hall effect technology to measure bidirectional AC and DC currents up to 42A with a single channel. The device features a sensitivity of 66mV/A, a linear accuracy of ±0.5%, and a linearity of ±0.6%. It operates within a supply voltage range of 4.5V to 5.5V, consuming a maximum supply current of 11mA. The component offers a fast response time of 0.5µs and supports frequencies up to 1MHz. It is housed in a 24-VSOP surface-mount package with dimensions of 0.220 inches (5.60mm) width and 10 leads, designed for operation across a temperature range of -40°C to 90°C.

Current Sensors Feature Summary

• Open-loop Hall effect sensing mechanism for non-contact current measurement
• Bidirectional detection capability for both AC and DC applications
• High-speed response with 0.5µs switching time and 1MHz frequency support
• Precision output with ±0.5% accuracy and ±0.6% linearity

Current Sensors Applications

• Motor control systems requiring precise current feedback
• Power supply units needing overcurrent protection
• Industrial automation equipment monitoring load currents
• Inverter and converter circuits for energy management

Current Sensors Procurement Notes

The CQ330F is officially listed as obsolete and no longer manufactured by Asahi Kasei Microdevices/AKM. Procurement is restricted to remaining stock from authorized distributors or secondary market suppliers. Buyers must verify the authenticity and storage conditions of available units due to the component's end-of-life status. Long-term production plans should account for potential supply chain disruptions, and alternative sourcing strategies are recommended for new designs.

Current Sensors Selection Notes

Engineers selecting this component should prioritize its high bandwidth and precision for dynamic load applications. The 42A rating and 66mV/A sensitivity suit moderate-to-high current environments. Consider the 24-VSOP package constraints for PCB layout. Since the part is obsolete, evaluate replacement options early in the design phase to ensure long-term viability. Verify that the 4.5V-5.5V supply range aligns with system power architecture before integration.

Current Sensors Part Context

The CQ330F belongs to the CQ series of coreless current sensors developed by Asahi Kasei Microdevices/AKM. This series leverages thin-film InSb Hall element technology, which received IEEE Milestone certification for its commercialization impact. The company has accumulated over 50 billion shipments of such sensors since 1983. The CQ series is designed for automotive and industrial applications, emphasizing reliability and high sensitivity in compact surface-mount packages.

Current Sensors Replacement Considerations

Publicly confirmed substitute part numbers for the CQ330F are not available in the provided documentation. Given the obsolete status, engineers should consult AKM's official cross-reference guides or contact the manufacturer directly for validated alternatives. Generic replacements may require verification of pin compatibility, sensitivity, and thermal performance.