CQ2232 Current Sensor - Equivalent & Substitute Parts

Part Overview

The CQ2232 is a Hall Effect current sensor manufactured by Asahi Kasei Microdevices (AKM) designed for AC/DC current measurement applications. This through-hole module provides open-loop, bidirectional sensing with a 21A measurement range and ratiometric voltage output. The product is classified as obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations where legacy compatibility is not required.

Substiute Parts

CQ2232

Asahi Kasei Microdevices/AKMIn Stock: 1045CQ2232 Datasheet

Current PartRFQ

CZ3A03

Asahi Kasei Microdevices/AKMIn Stock: 3243CZ3A03 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CQ2232 is determined by the following critical parameters that must remain compatible:

• Sensor Technology: Hall Effect, open-loop architecture for AC/DC measurement
• Measurement Capability: Current sensing range and sensitivity must support the application's current requirements
• Output Configuration: Voltage output for direct integration with existing signal conditioning circuits
• Electrical Interface: Supply voltage range and output impedance compatibility
• Thermal Performance: Operating temperature range must encompass the application environment
• Polarization: Bidirectional sensing capability for AC and DC current measurement
• Regulatory Compliance: RoHS3 compliance for environmental standards

The CZ3A03 qualifies as a substitute based on these core parameters: it maintains Hall Effect open-loop technology, supports comparable current sensing (22.1A), provides voltage output, operates within overlapping supply voltage specifications, maintains bidirectional polarization, and meets RoHS3 compliance. However, mounting type differs (surface mount vs. through hole), requiring PCB redesign considerations.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same PCB Layout): Direct substitution of CQ2232 with CZ3A03 is not feasible due to incompatible mounting types (through-hole vs. surface mount) and different package geometries. PCB redesign is mandatory.

For Functional Equivalence (New Design or PCB Redesign): The CZ3A03 serves as a functional equivalent when the following conditions are met:

• Application operating temperature does not exceed +85°C (CZ3A03 limitation vs. CQ2232's +150°C capability)
• Power supply minimum voltage is 3V or higher (CZ3A03 requires 3V minimum; CQ2232 operates from 2.7V)
• Signal conditioning circuits can accommodate 70mV/A sensitivity (vs. 60mV/A) and ±2.1% accuracy specification (vs. ±1%)
• Power budget accommodates 16mA typical supply current (vs. 9.6mA maximum)
• PCB layout supports 16-PowerSOIC surface-mount package with 10-lead configuration
• Storage and handling procedures comply with MSL 2A moisture sensitivity requirements (4-week shelf life limit)

Product Status Consideration: CQ2232 is classified as obsolete. CZ3A03 is active production status, ensuring long-term availability and supply chain continuity for new designs or system upgrades.

Frequently Asked Questions (FAQ)

Q: Can CZ3A03 replace CQ2232 without PCB modification? A: No. CQ2232 uses through-hole mounting while CZ3A03 is surface-mount (16-PowerSOIC package). PCB redesign is required for any substitution.

Q: What is the primary difference in output sensitivity between these parts? A: CZ3A03 provides 70mV/A sensitivity compared to CQ2232's 60mV/A. This 17% increase requires recalibration of downstream signal conditioning and analog-to-digital conversion circuits.

Q: Is CZ3A03 suitable for high-temperature applications? A: CZ3A03 operates to +85°C maximum. If the application requires operation above +85°C, CZ3A03 is not suitable. CQ2232 supports -40°C to +150°C operation.

Q: What are the supply voltage compatibility considerations? A: CQ2232 operates from 2.7V to 3.63V. CZ3A03 requires 3V minimum. If the system supplies 2.7V to 2.99V, CZ3A03 will not function. Verify power supply specifications before substitution.

Q: How does the increased supply current of CZ3A03 affect system design? A: CZ3A03 draws 16mA typical supply current versus CQ2232's 9.6mA maximum. This 67% increase impacts power budget calculations, thermal management, and power supply capacity requirements.

Q: What storage precautions apply to CZ3A03? A: CZ3A03 has MSL 2A rating (4-week shelf life in controlled conditions). CQ2232 has MSL 1 (unlimited shelf life). CZ3A03 requires moisture-controlled storage and handling per IPC-A-610 standards.

Q: Are both parts RoHS3 compliant? A: Yes. Both CQ2232 and CZ3A03 meet ROHS3 compliance requirements for environmental and regulatory standards.

Q: What accuracy specification differences should be considered? A: CQ2232 provides ±1% accuracy. CZ3A03 provides ±2.1% accuracy. Applications requiring tighter accuracy tolerance may require additional calibration or signal conditioning with CZ3A03.