CQ2333 Equivalent & Substitute Parts

Part Overview

The CQ2333 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 35A measurement range and ratiometric voltage output. The product is currently obsolete, making equivalent substitutes necessary for new designs or component replacement in legacy systems. The CQ2333 remains available in inventory (1080 pcs) and maintains ROHS3 compliance.

Substiute Parts

CQ2333

Asahi Kasei Microdevices/AKMIn Stock: 1170CQ2333 Datasheet

Current PartRFQ

CZ3703

Asahi Kasei Microdevices/AKMIn Stock: 1501CZ3703 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The CZ3703 qualifies as a functional equivalent to the CQ2333 based on the following critical parameters:

Matching Parameters:

• Sensor technology: Hall Effect, open-loop architecture
• Measurement capability: AC/DC bidirectional current sensing
• Current range: 36A (within 1A of CQ2333's 35A specification)
• Output format: Ratiometric voltage output
• Sensitivity: 60mV/A (identical)
• Supply voltage: 4.5V ~ 5.5V (identical)
• Response time: 1µs (identical)
• Accuracy: ±1% (identical)
• Polarization: Bidirectional
• RoHS compliance: ROHS3 Compliant
• Regulatory classification: EAR99, HTSUS 8542.39.0001

Functional Differences: The CZ3703 is an active product (versus obsolete CQ2333 status) with improved linearity (±0.13% vs ±1%) and operates across a slightly narrower temperature range (-40°C ~ 105°C vs -40°C ~ 110°C). The primary design change is the transition from through-hole module packaging to surface-mount 16-PowerSOIC form factor.

Parameter Comparison

Engineering Selection Recommendations

CZ3703 as Primary Substitute:

The CZ3703 is the manufacturer-recommended equivalent for the obsolete CQ2333. Both components share identical core sensing specifications (Hall Effect technology, 60mV/A sensitivity, 1µs response time, bidirectional AC/DC measurement) and operate within the same 4.5V–5.5V supply voltage window. The CZ3703 is an active product with current manufacturing support and improved linearity performance (±0.13% vs ±1%).

Design Considerations:

1. Packaging Transition: The CZ3703 requires PCB redesign from through-hole to surface-mount assembly. The 16-PowerSOIC package (0.303" width, 10 leads) is a standard form factor with established manufacturing processes.

2. Power Budget: The CZ3703 draws up to 25mA supply current compared to the CQ2333's 11mA maximum. Verify that the power supply and PCB routing can accommodate this increased current draw.

3. Temperature Range: The CQ2333 operates to 110°C maximum; the CZ3703 operates to 105°C. For applications requiring operation above 105°C, the CQ2333 may be retained if inventory permits, or alternative sensors should be evaluated.

4. Compliance: Both components maintain ROHS3 compliance and identical regulatory classifications (EAR99, HTSUS 8542.39.0001), ensuring no regulatory barriers to substitution.

Frequently Asked Questions (FAQ)

Q: Can the CZ3703 directly replace the CQ2333 in existing designs?

A: Electrical substitution is direct—both components provide identical output characteristics (60mV/A sensitivity, ratiometric voltage output, 1µs response time, ±1% accuracy). However, physical substitution requires PCB redesign due to the packaging change from through-hole module to 16-PowerSOIC surface-mount form factor.

Q: What are the key differences between these two sensors?

A: The primary differences are: (1) mounting technology (through-hole vs. surface-mount), (2) linearity specification (±1% vs. ±0.13%), (3) maximum supply current (11mA vs. 25mA), and (4) product status (obsolete vs. active). All core sensing parameters remain equivalent.

Q: Is the CZ3703 suitable for high-temperature applications?

A: The CZ3703 operates to 105°C maximum. If your application requires operation above 105°C, the CQ2333's 110°C rating may be necessary. Consult the sensor manufacturer for alternative high-temperature options if the 105°C limit is insufficient.

Q: What is the impact of the increased supply current in the CZ3703?

A: The CZ3703 draws up to 25mA compared to the CQ2333's 11mA. This 14mA increase requires verification of power supply capacity and PCB trace sizing to ensure adequate current delivery without voltage drop or thermal issues.

Q: Are there any compliance or regulatory concerns with substitution?

A: No. Both components are ROHS3 compliant and share identical regulatory classifications (EAR99, HTSUS 8542.39.0001). Substitution presents no regulatory barriers.

Q: What is the moisture sensitivity level (MSL) difference?

A: The CQ2333 has MSL 1 (unlimited shelf life), while the CZ3703 has MSL 2A (4-week shelf life). The CZ3703 requires controlled storage conditions to maintain solderability. Verify storage and handling procedures before assembly.