CQ2233 Equivalent & Substitute Parts

Part Overview

The CQ2233 is a Hall Effect current sensor manufactured by Asahi Kasei Microdevices (AKM) designed for AC/DC current measurement applications. This is a through-hole mounted module with open-loop bidirectional sensing capability, rated for 35A continuous current measurement with ratiometric voltage output. The product is currently obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Key Parameters

Parameter	CQ2233 Specification
Manufacturer	Asahi Kasei Microdevices (AKM)
Sensor Type	Hall Effect, Open Loop
Current Sensing Range	35A
Number of Channels	1
Output Type	Ratiometric, Voltage
Sensitivity	37.5 mV/A
Frequency Response	300 kHz
Linearity	±1%
Accuracy	±1%
Supply Voltage	2.7V – 3.63V
Response Time	1 µs
Supply Current (Max)	9.6 mA
Operating Temperature	-40°C to +150°C
Polarization	Bidirectional
Mounting Type	Through Hole
Package Type	Module
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the CQ2233 is determined by the following critical parameters:

Sensor Technology: Hall Effect, open-loop topology for AC/DC current measurement
Current Measurement Capability: Minimum 32.2A to 35A range
Output Configuration: Voltage output with ratiometric or fixed characteristics
Electrical Interface: Single-channel, bidirectional sensing
Supply Voltage Compatibility: Operating range overlap with 2.7V–3.63V
Response Characteristics: Frequency response and linearity suitable for the application
Thermal Range: Operating temperature compatibility
Compliance: ROHS3 certification maintained

The CZ3A04 qualifies as a substitute based on these parameters, though mounting and packaging differ due to the obsolescence of the original through-hole module format.

Parameter Comparison

Parameter	CQ2233	CZ3A04 (Substitute)	Compatibility Notes
Manufacturer	AKM	AKM	Same manufacturer ensures design continuity
Sensor Type	Hall Effect, Open Loop	Hall Effect, Open Loop	Identical sensing technology
Current Sensing	35A	32.2A	CZ3A04 rated 7.7% lower; suitable for applications not requiring full 35A
Channels	1	1	Single-channel configuration maintained
Output Type	Ratiometric, Voltage	Voltage	Both provide voltage output; CZ3A04 output is fixed rather than ratiometric
Sensitivity	37.5 mV/A	48 mV/A	CZ3A04 provides 28% higher sensitivity; requires signal conditioning adjustment
Linearity	±1%	±0.6%	CZ3A04 offers superior linearity performance
Accuracy	±1%	±2.1%	CQ2233 provides tighter accuracy specification
Supply Voltage	2.7V – 3.63V	3V – 3.6V	Partial overlap; CZ3A04 requires minimum 3V (0.3V higher than CQ2233)
Response Time	1 µs	1 µs	Identical response time
Supply Current	9.6 mA (Max)	16 mA (Typ)	CZ3A04 draws 66.7% higher current
Operating Temperature	-40°C to +150°C	-40°C to +85°C	CQ2233 supports 65°C higher maximum temperature
Polarization	Bidirectional	Bidirectional	Both support bidirectional current measurement
Mounting Type	Through Hole	Surface Mount	Different mounting technology; PCB redesign required
Package	Module	16-PowerSOIC (10 Leads)	Significant form factor change
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Both meet environmental compliance requirements
Product Status	Obsolete	Active	CZ3A04 is actively manufactured and supported

Engineering Selection Recommendations

Substitution Feasibility: The CZ3A04 is electrically compatible with the CQ2233 for AC/DC Hall Effect current sensing applications, provided the following conditions are met:

Current Rating Verification: Applications requiring the full 35A sensing capability must confirm that 32.2A is sufficient. The CZ3A04 is suitable for systems operating at or below 32.2A continuous current.
Supply Voltage Adjustment: The CZ3A04 minimum supply voltage is 3V, compared to the CQ2233's 2.7V minimum. Verify that system power supplies deliver at least 3V to the sensor.
Temperature Operating Range: The CZ3A04 maximum operating temperature is 85°C, versus the CQ2233's 150°C. Applications requiring operation above 85°C cannot use this substitute.
Sensitivity and Signal Conditioning: The CZ3A04 provides 48 mV/A sensitivity versus the CQ2233's 37.5 mV/A. Analog signal conditioning circuits must be recalibrated to accommodate the 28% higher sensitivity.
Output Characteristics: The CQ2233 provides ratiometric output, while the CZ3A04 provides fixed voltage output. System firmware or analog signal processing must be adapted accordingly.
Mounting and PCB Integration: The CZ3A04 is a surface-mount 16-PowerSOIC package, requiring PCB redesign from the original through-hole module configuration. Footprint, trace routing, and thermal management must be re-evaluated.
Compliance and Certification: Both components maintain ROHS3 compliance, ensuring environmental and regulatory compatibility.

Recommendation: The CZ3A04 is suitable as a substitute for new designs or system updates where the above parameters are accommodated through design modification. For applications requiring the full 35A rating, extended temperature range to 150°C, or ratiometric output, alternative AKM Hall Effect sensors from the active product portfolio should be evaluated.

Frequently Asked Questions (FAQ)

Q: Can the CZ3A04 directly replace the CQ2233 without PCB modification?

A: No. The CZ3A04 is a surface-mount 16-PowerSOIC package, while the CQ2233 is a through-hole module. PCB redesign is required, including footprint layout, trace routing, and potentially thermal management considerations.

Q: What is the maximum current the CZ3A04 can measure?

A: The CZ3A04 is rated for 32.2A continuous current measurement. Applications requiring measurement of currents above 32.2A must use an alternative sensor.

Q: Are there differences in output signal characteristics between these sensors?

A: Yes. The CQ2233 provides ratiometric voltage output, meaning the output scales with the supply voltage. The CZ3A04 provides fixed voltage output. Signal conditioning and calibration routines must be adjusted accordingly.

Q: What is the impact of the CZ3A04's higher sensitivity (48 mV/A vs. 37.5 mV/A)?

A: The higher sensitivity requires recalibration of analog-to-digital converter (ADC) scaling factors and signal conditioning gain settings. The 28% increase in sensitivity will result in proportionally higher output voltage for the same measured current.

Q: Can the CZ3A04 operate in the full temperature range of the CQ2233?

A: No. The CZ3A04 operates from -40°C to +85°C, while the CQ2233 operates to +150°C. Applications requiring operation above 85°C cannot use the CZ3A04.

Q: What is the minimum supply voltage for the CZ3A04?

A: The CZ3A04 requires a minimum supply voltage of 3V. The CQ2233 operates at 2.7V minimum. Verify that system power supplies deliver at least 3V to the sensor.

Q: Is the CZ3A04 actively manufactured?

A: Yes. The CZ3A04 is in active production status, ensuring long-term availability and supply chain stability, unlike the obsolete CQ2233.

Q: What is the difference in supply current consumption?

A: The CZ3A04 draws a typical supply current of 16 mA, compared to the CQ2233's maximum of 9.6 mA. This 66.7% increase in current consumption must be considered in power budget calculations.

Q: Are both sensors RoHS compliant?

A: Yes. Both the CQ2233 and CZ3A04 are ROHS3 compliant, meeting environmental and regulatory requirements for electronic components.

Q: What packaging format is the CZ3A04 supplied in?

A: The CZ3A04 is supplied in Tape & Reel (TR) format, standard for surface-mount components. The CQ2233 was supplied as a through-hole module.

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