CQ2234 Equivalent & Substitute Parts

Part Overview

The CQ2234 is a Hall Effect current sensor manufactured by Asahi Kasei Microdevices (AKM) designed for AC/DC current measurement applications. This through-hole module sensor features open-loop bidirectional measurement capability with a 54A sensing 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 equivalent functionality is required.

Substiute Parts

CQ2234

Asahi Kasei Microdevices/AKMIn Stock: 910CQ2234 Datasheet

Current PartRFQ

CZ3A05

Asahi Kasei Microdevices/AKMIn Stock: 1513CZ3A05 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CQ2234 is determined by the following critical parameters:

Core Functional Requirements:

• Sensor technology: Hall Effect, open-loop architecture
• Measurement capability: AC/DC bidirectional current sensing
• Single-channel configuration
• Voltage output format

Electrical Compatibility Criteria:

• Supply voltage range overlap or compatibility with system design
• Output sensitivity and signal level compatibility
• Frequency response adequate for application bandwidth
• Accuracy and linearity specifications within acceptable tolerance
• Response time performance

Physical and Environmental Constraints:

• Operating temperature range coverage
• Mounting compatibility (through-hole vs. surface mount considerations for board redesign)
• RoHS and regulatory compliance alignment

The CZ3A05 qualifies as a substitute based on matching core sensor architecture (Hall Effect, open-loop, bidirectional, single-channel, voltage output) and equivalent functional performance parameters, despite differences in mounting technology and package form factor.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The CZ3A05 serves as a functional equivalent for the obsolete CQ2234 in applications requiring Hall Effect open-loop bidirectional current sensing with voltage output. Both components share identical sensor architecture, single-channel configuration, and equivalent sensitivity specifications.

Critical Design Considerations:

1. Mounting Technology Transition: The CQ2234 uses through-hole mounting while the CZ3A05 employs surface-mount technology (16-PowerSOIC package). PCB redesign is mandatory for mechanical integration.

2. Supply Voltage Compatibility: The CZ3A05 operates within a narrower supply voltage window (3V – 3.6V) compared to the CQ2234 (2.7V – 3.63V). Verify system supply voltage falls within the CZ3A05 specification before selection.

3. Temperature Range: The CQ2234 supports operation to +110°C while the CZ3A05 is rated to +85°C. Applications requiring extended high-temperature operation must evaluate this limitation.

4. Accuracy Trade-off: The CQ2234 provides ±1% accuracy while the CZ3A05 specifies ±2.1%. Applications with tight accuracy requirements must account for this specification difference.

5. Current Capacity: The CZ3A05 offers 64.5A sensing range versus the CQ2234's 54A, providing additional headroom for higher current applications.

6. Regulatory Compliance: Both components meet ROHS3 requirements and share identical ECCN and HTSUS classifications, ensuring compliance continuity.

7. Product Status: The CZ3A05 is actively manufactured by AKM, ensuring long-term availability and supply chain stability compared to the obsolete CQ2234.

Frequently Asked Questions (FAQ)

Q: Can the CZ3A05 directly replace the CQ2234 without PCB modification?

A: No. The CQ2234 is a through-hole module while the CZ3A05 is a surface-mount 16-PowerSOIC package. PCB redesign is required for mechanical and electrical integration.

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

A: Both use identical Hall Effect open-loop technology with single-channel voltage output. Primary differences include: CZ3A05 has higher current sensing capacity (64.5A vs. 54A), superior linearity (±0.6% vs. ±1%), but lower accuracy (±2.1% vs. ±1%) and narrower supply voltage range (3V–3.6V vs. 2.7V–3.63V).

Q: Is the CZ3A05 suitable for high-temperature applications?

A: The CZ3A05 operates to +85°C maximum, which is 25°C lower than the CQ2234's +110°C rating. Applications requiring operation above +85°C must seek alternative solutions.

Q: Are there supply voltage compatibility issues?

A: The CZ3A05 requires 3V to 3.6V supply voltage. If your system supplies voltage below 3V or above 3.6V, the CZ3A05 will not operate within specification. Verify your supply voltage falls within this range.

Q: What is the impact of the CZ3A05's higher supply current consumption?

A: The CZ3A05 draws up to 16 mA typical supply current compared to the CQ2234's 9.6 mA maximum. This 67% increase in supply current may impact power budget calculations and thermal management in battery-powered or power-constrained applications.

Q: Does the CZ3A05 maintain the same response time performance?

A: Yes. Both sensors provide 1 µs response time, ensuring equivalent dynamic performance for transient current measurement applications.

Q: Are moisture sensitivity requirements different?

A: Yes. The CQ2234 has MSL rating 1 (unlimited moisture exposure), while the CZ3A05 has MSL rating 2A (4-week moisture exposure limit). The CZ3A05 requires more stringent moisture control during storage and handling.

Q: Why is the CZ3A05 recommended despite lower accuracy?

A: The CZ3A05 is actively manufactured and supported by AKM, ensuring long-term availability and supply chain continuity. The CQ2234 is obsolete. For applications where ±2.1% accuracy is acceptable, the CZ3A05 provides a viable path forward. Applications requiring ±1% accuracy must evaluate alternative sensor families.