CQ3302 Equivalent & Substitute Parts

Part Overview

The CQ3302 is a Hall Effect current sensor manufactured by Asahi Kasei Microdevices (AKM) designed for AC/DC current measurement applications. This component features a 21A sensing capability with open-loop bidirectional operation and ratiometric voltage output. The CQ3302 is classified as obsolete, making identification of compatible substitute components essential for ongoing design support and production continuity.

Substiute Parts

CQ3302

Asahi Kasei Microdevices/AKMIn Stock: 2673CQ3302 Datasheet

Current PartRFQ

CZ3702

Asahi Kasei Microdevices/AKMIn Stock: 3159CZ3702 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The CZ3702 qualifies as a direct substitute for the CQ3302 based on the following critical parameters:

Matching Parameters:

• Manufacturer: Asahi Kasei Microdevices (AKM)
• Sensor Type: Hall Effect, Open Loop
• Current Sensing Capability: 21A
• Number of Channels: 1
• Output Configuration: Ratiometric, Voltage
• Sensitivity: 100mV/A
• Supply Voltage Range: 4.5V ~ 5.5V
• Polarization: Bidirectional
• Mounting Type: Surface Mount
• RoHS Compliance: ROHS3 Compliant

Differing Parameters:

• Package Type: CZ3702 uses 16-PowerSOIC (0.303", 7.70mm Width) versus CQ3302's 24-LSSOP (0.220", 5.60mm Width)
• Product Status: CZ3702 is Active (versus CQ3302 Obsolete)
• Operating Temperature Range: CZ3702 extends to -40°C ~ 105°C (versus CQ3302's -40°C ~ 90°C)
• Linearity: CZ3702 offers ±0.13% (versus CQ3302's ±0.6%)
• Accuracy: CZ3702 specifies ±1% (versus CQ3302's ±0.5%)
• Response Time: CZ3702 is 1µs (versus CQ3302's 0.5µs)
• Current Supply: CZ3702 draws 25mA maximum (versus CQ3302's 11mA)

Parameter Comparison

Engineering Selection Recommendations

The CZ3702 is the designated manufacturer substitute for the obsolete CQ3302. Both components maintain identical core functional specifications for Hall Effect current sensing at 21A with 100mV/A sensitivity and bidirectional operation.

The CZ3702 offers the advantage of active product status, ensuring long-term availability and manufacturing support. The extended operating temperature range (-40°C ~ 105°C versus -40°C ~ 90°C) provides broader environmental compatibility. Both components maintain ROHS3 compliance and identical supply voltage requirements (4.5V ~ 5.5V).

PCB layout modifications are required due to package geometry differences. The CZ3702 uses a 16-PowerSOIC package with larger footprint dimensions (0.303" width) compared to the CQ3302's 24-LSSOP package (0.220" width). Pin configuration and lead count remain consistent at 10 leads, supporting functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can the CZ3702 directly replace the CQ3302 without circuit modifications?

A: Functional substitution is supported. Pin configuration and electrical interface remain compatible. PCB layout redesign is necessary due to different package geometries (16-PowerSOIC versus 24-LSSOP).

Q: What are the key differences between these components?

A: Primary differences include package type, operating temperature range extension, and supply current draw. The CZ3702 draws 25mA maximum versus the CQ3302's 11mA. Response time differs at 1µs versus 0.5µs. Linearity improves in the CZ3702 (±0.13% versus ±0.6%), while accuracy specification changes to ±1% versus ±0.5%.

Q: Is the CZ3702 suitable for applications requiring the CQ3302's -40°C ~ 90°C range?

A: Yes. The CZ3702 supports the full -40°C ~ 90°C range and extends operation to 105°C, providing broader environmental coverage.

Q: Are both components RoHS compliant?

A: Both the CQ3302 and CZ3702 are ROHS3 compliant with identical moisture sensitivity levels (2A, 4 Weeks).

Q: What supply voltage is required for the CZ3702?

A: The CZ3702 requires 4.5V ~ 5.5V supply voltage, identical to the CQ3302.

Q: How does the package change affect PCB design?

A: The CZ3702's 16-PowerSOIC package (0.303" width, 10 leads) differs from the CQ3302's 24-LSSOP package (0.220" width, 10 leads). Footprint redesign is required, though pin count and electrical interface remain compatible.