CQ3201 Equivalent & Substitute Parts

Part Overview

The CQ3201 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, rated for 10.1A sensing current and 3.3V supply voltage. The device is currently obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. The CQ3201 is available in a 24-LSSOP package with 10 leads and delivers ratiometric voltage output suitable for embedded measurement systems.

Substiute Parts

CQ3201

Asahi Kasei Microdevices/AKMIn Stock: 699CQ3201 Datasheet

Current PartRFQ

CZ3A01

Asahi Kasei Microdevices/AKMIn Stock: 1926CZ3A01 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The CZ3A01 is identified as the manufacturer-recommended substitute for the obsolete CQ3201. Substitution eligibility is determined by the following critical parameters:

Substitution Criteria:

• Sensor technology: Hall Effect, open-loop architecture
• Measurement capability: AC/DC bidirectional current sensing
• Output format: Voltage-based ratiometric output
• Supply voltage compatibility: 3.3V nominal operation
• Mounting technology: Surface mount, single-channel configuration
• Regulatory compliance: ROHS3 certification maintained
• Manufacturer: Same source (Asahi Kasei Microdevices)

The CZ3A01 maintains functional equivalence across these core parameters while operating within the allowed electrical and mechanical tolerances for this product category.

Parameter Comparison

Engineering Selection Recommendations

The CZ3A01 is the manufacturer-recommended substitute for the obsolete CQ3201. Both devices maintain ROHS3 compliance and are manufactured by Asahi Kasei Microdevices, ensuring regulatory consistency and supply chain continuity.

Selection Basis:

• CZ3A01 is actively produced, addressing the obsolescence of CQ3201
• Both devices employ identical Hall Effect open-loop sensing architecture
• Both support bidirectional AC/DC current measurement with voltage output
• Both operate within compatible 3.3V supply voltage specifications
• Both maintain single-channel configuration and surface mount technology

Design Considerations:

• Package footprint differs: CZ3A01 uses 16-PowerSOIC versus CQ3201's 24-LSSOP, requiring PCB layout modification
• CZ3A01 supports higher current sensing (12.9A versus 10.1A), providing additional measurement headroom
• CZ3A01 supply voltage range (3.0V to 3.6V) accommodates broader system tolerances than CQ3201's fixed 3.3V
• CQ3201 offers faster response time (0.5µs) and lower supply current (6.2mA) compared to CZ3A01 (1µs, 16mA typical)
• CQ3201 maintains wider operating temperature range (-40°C to 90°C) versus CZ3A01 (-40°C to 85°C)

Frequently Asked Questions (FAQ)

Q: Can CZ3A01 directly replace CQ3201 without PCB modification? A: No. The CZ3A01 uses a 16-PowerSOIC package (0.303", 7.70mm width) while the CQ3201 uses a 24-LSSOP package (0.220", 5.60mm width). PCB layout and footprint redesign is required.

Q: What are the key electrical differences between CQ3201 and CZ3A01? A: CZ3A01 provides higher current sensing capability (12.9A versus 10.1A), wider supply voltage tolerance (3.0V to 3.6V versus fixed 3.3V), and broader linearity specification (±0.6%). CQ3201 offers faster response time (0.5µs versus 1µs) and lower supply current consumption (6.2mA versus 16mA typical).

Q: Are both devices RoHS compliant? A: Yes. Both CQ3201 and CZ3A01 are ROHS3 compliant, maintaining regulatory consistency for applications requiring environmental compliance certification.

Q: What is the moisture sensitivity difference? A: CQ3201 has MSL rating 1 (unlimited shelf life), while CZ3A01 has MSL rating 2A (4-week shelf life). CQ3201 requires less stringent moisture control during storage and handling.

Q: Which device should be selected for new designs? A: CZ3A01 is the active product and manufacturer-recommended substitute. New designs should incorporate CZ3A01 to ensure long-term supply availability and manufacturer support.

Q: Are the output sensitivities compatible? A: CZ3A01 sensitivity is 120mV/A versus CQ3201's 130mV/A. This 10mV/A difference requires signal conditioning adjustment in measurement circuits. Firmware or analog signal processing recalibration may be necessary.

Q: What is the operating temperature range difference? A: CQ3201 operates from -40°C to 90°C, while CZ3A01 operates from -40°C to 85°C. Applications requiring operation above 85°C cannot use CZ3A01 as a substitute.