CQ2235 Equivalent & Substitute Parts

Part Overview

The CQ2235 is a Hall Effect current sensor manufactured by Asahi Kasei Microdevices (AKM) designed for AC/DC current measurement applications. This through-hole module sensor provides open-loop, bidirectional current sensing with a maximum rated current of 85A and ratiometric voltage output. The product is currently obsolete, making identification of compatible substitute components essential for ongoing system support, design updates, and production continuity.

Substiute Parts

CQ2235

Asahi Kasei Microdevices/AKMIn Stock: 1416CQ2235 Datasheet

Current PartRFQ

CZ3A06

Asahi Kasei Microdevices/AKMIn Stock: 1827CZ3A06 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CQ2235 is determined by the following critical parameters:

• Sensor Technology: Hall Effect, open-loop topology
• Measurement Type: AC/DC bidirectional current sensing
• Current Rating: Maximum sensing capability of 85A or higher
• Output Configuration: Voltage output (ratiometric or fixed)
• Sensitivity: Comparable mV/A output per ampere of input current
• Supply Voltage Compatibility: Operating voltage range suitable for system requirements
• Accuracy and Linearity: Measurement precision within acceptable tolerances
• Response Time: 1 µs or faster for dynamic applications
• Temperature Range: Operating limits matching or exceeding -40°C to +150°C
• Polarization: Bidirectional current measurement capability
• Compliance: ROHS3 certification for regulatory alignment

The CZ3A06 qualifies as a substitute based on matching sensor type, bidirectional operation, comparable sensitivity, single-channel configuration, and ROHS3 compliance. However, mounting type differs (surface mount vs. through hole), requiring PCB redesign consideration.

Parameter Comparison

Engineering Selection Recommendations

CZ3A06 Substitution Feasibility

The CZ3A06 is the manufacturer-recommended substitute for the obsolete CQ2235. Both components share the same sensor technology (Hall Effect, open-loop), single-channel configuration, bidirectional measurement capability, and ROHS3 compliance. Sensitivity values are closely matched (15 mV/A vs. 15.5 mV/A), and response time is identical at 1 µs.

Critical Considerations for Implementation

1. Mounting Architecture: The CQ2235 uses through-hole mounting while the CZ3A06 is surface-mount (16-PowerSOIC package). PCB redesign is mandatory; existing through-hole footprints cannot accommodate the CZ3A06 without layout modifications.

2. Temperature Operating Range: The CQ2235 operates to +150°C; the CZ3A06 is limited to +85°C. Applications requiring operation above +85°C cannot use the CZ3A06 without thermal management review or alternative sourcing.

3. Supply Voltage: The CZ3A06 requires minimum 3V supply (vs. CQ2235 minimum 2.7V). Verify system power rails meet this requirement.

4. Current Consumption: The CZ3A06 draws up to 14 mA typical supply current compared to 9.6 mA maximum for the CQ2235. Confirm power budget accommodates the increase.

5. Accuracy Specification: The CQ2235 specifies ±1% accuracy while the CZ3A06 is ±2.1%. Evaluate whether system measurement tolerance permits this degradation.

6. Active Product Status: The CZ3A06 is actively manufactured by AKM, ensuring long-term availability and supply chain stability compared to the obsolete CQ2235.

Frequently Asked Questions (FAQ)

Q: Can the CZ3A06 directly replace the CQ2235 without PCB modification?

A: No. The CQ2235 is a through-hole module while the CZ3A06 is a surface-mount 16-PowerSOIC package. Physical footprints are incompatible. PCB redesign is required for mechanical and electrical integration.

Q: What is the maximum current the CZ3A06 can measure?

A: The CZ3A06 is rated for 103.3A maximum current sensing, exceeding the CQ2235's 85A rating. It is suitable for applications requiring equal or lower current measurement.

Q: Are the output signals compatible between CQ2235 and CZ3A06?

A: Both provide voltage output with comparable sensitivity (15.5 mV/A vs. 15 mV/A). Signal conditioning circuits may require minor adjustment due to the 0.5 mV/A difference, but the outputs are functionally compatible for most applications.

Q: What is the temperature limitation when using CZ3A06 as a substitute?

A: The CZ3A06 operates from -40°C to +85°C. Applications requiring operation above +85°C cannot use this substitute. The original CQ2235 supported -40°C to +150°C.

Q: Does the CZ3A06 require different supply voltage than the CQ2235?

A: The CZ3A06 requires 3V to 3.6V supply, with a minimum of 3V. The CQ2235 operated from 2.7V to 3.63V. Verify system power rails provide at least 3V for CZ3A06 compatibility.

Q: Is the CZ3A06 ROHS3 compliant?

A: Yes. Both the CQ2235 and CZ3A06 are ROHS3 compliant, meeting environmental and regulatory requirements.

Q: What is the response time difference between these sensors?

A: Both sensors have identical 1 µs response time, ensuring equivalent dynamic performance in AC/DC current measurement applications.

Q: Why is the CZ3A06 recommended as the official substitute?

A: Asahi Kasei Microdevices designates the CZ3A06 as the manufacturer-recommended substitute due to matching sensor technology, comparable electrical performance, and active product status. The CQ2235 is obsolete and no longer manufactured.