CQ3204 Equivalent & Substitute Parts

Part Overview

The CQ3204 is a coreless current sensor manufactured by Asahi Kasei Microdevices (AKM) designed for AC/DC current measurement applications. It features Hall Effect open-loop technology with bidirectional sensing capability and a 44A sensing range. The device is packaged in a 24-LSSOP (0.220", 5.60mm Width) surface mount configuration with 10 leads.

The CQ3204 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this sensor.

Substiute Parts

CQ3204

Asahi Kasei Microdevices/AKMIn Stock: 1193CQ3204 Datasheet

Current PartRFQ

CZ3A05

Asahi Kasei Microdevices/AKMIn Stock: 1513CZ3A05 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CQ3204 is determined by the following critical parameters:

Functional Compatibility Criteria:

• Sensor technology: Hall Effect, open-loop topology
• Measurement capability: AC/DC bidirectional current sensing
• Single-channel configuration
• Surface mount packaging suitable for PCB integration

Electrical Compatibility Criteria:

• Supply voltage range overlap or compatibility with system design
• Output type and sensitivity characteristics
• Accuracy and linearity specifications within acceptable tolerance
• Response time performance for application requirements
• Operating temperature range coverage

Mechanical Compatibility Criteria:

• Surface mount package type and lead configuration
• Physical dimensions and PCB footprint compatibility

The CZ3A05 qualifies as a substitute based on matching sensor technology (Hall Effect, open-loop), measurement type (AC/DC), channel count (1), polarization (bidirectional), mounting type (surface mount), and regulatory compliance (ROHS3). Differences in current sensing range, sensitivity, accuracy, and package form factor must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The CZ3A05 is the manufacturer-recommended substitute for the obsolete CQ3204. Both devices maintain ROHS3 compliance and are manufactured by Asahi Kasei Microdevices, ensuring consistent design philosophy and reliability standards.

The CZ3A05 is classified as active product status, providing assured long-term availability and supply chain continuity compared to the obsolete CQ3204.

Key differences requiring design evaluation:

Current Sensing Range: The CZ3A05 provides a higher sensing range (64.5A versus 44A). Applications operating below 44A will function within the CZ3A05 specification.

Sensitivity: The CZ3A05 exhibits lower sensitivity (24mV/A versus 30mV/A). Signal conditioning and analog-to-digital conversion parameters may require adjustment.

Accuracy: The CZ3A05 specifies ±2.1% accuracy versus the CQ3204's ±1.2%. Applications with stringent accuracy requirements must confirm tolerance compatibility.

Package Form Factor: The CZ3A05 uses a 16-PowerSOIC package (0.303", 7.70mm Width) versus the CQ3204's 24-LSSOP package (0.220", 5.60mm Width). PCB layout and footprint redesign is required.

Operating Temperature: The CZ3A05 maximum operating temperature is 85°C versus the CQ3204's 90°C. Applications operating near upper temperature limits require thermal analysis.

Response Time: The CZ3A05 response time is 1µs versus the CQ3204's 0.5µs. High-speed current measurement applications must confirm timing compatibility.

Frequently Asked Questions (FAQ)

Q: Can the CZ3A05 directly replace the CQ3204 without PCB modifications?

A: No. The CZ3A05 uses a different package type (16-PowerSOIC versus 24-LSSOP) with different physical dimensions and lead configurations. PCB footprint redesign and layout modifications are required.

Q: What is the primary reason for substitution?

A: The CQ3204 is classified as obsolete. The CZ3A05 is the manufacturer-recommended active substitute, ensuring continued supply availability and design continuity.

Q: Are there compatibility concerns with the different current sensing ranges?

A: The CZ3A05 has a higher sensing range (64.5A versus 44A). Applications designed for the CQ3204's 44A range will operate within the CZ3A05 specification. However, sensitivity differences (24mV/A versus 30mV/A) require signal conditioning circuit evaluation.

Q: How do accuracy differences affect system performance?

A: The CZ3A05 specifies ±2.1% accuracy versus the CQ3204's ±1.2%. Applications requiring ±1.2% accuracy must confirm that ±2.1% meets system-level tolerance budgets.

Q: Are both devices RoHS compliant?

A: Yes. Both the CQ3204 and CZ3A05 are ROHS3 compliant, meeting environmental and regulatory requirements.

Q: What is the impact of different response times?

A: The CZ3A05 response time is 1µs versus the CQ3204's 0.5µs. Applications requiring sub-microsecond response performance must evaluate whether the CZ3A05 meets timing requirements.

Q: Does the CZ3A05 support bidirectional current measurement?

A: Yes. The CZ3A05 maintains bidirectional polarization capability, matching the CQ3204's AC/DC measurement functionality.

Q: What is the moisture sensitivity difference?

A: The CQ3204 has MSL 1 (unlimited moisture sensitivity level), while the CZ3A05 has MSL 2A (4 weeks). The CZ3A05 requires controlled storage and handling conditions during manufacturing and assembly.