CZRW4697-G Equivalent & Substitute Parts

Part Overview

The CZRW4697-G is a Zener diode rated at 10 V nominal voltage with 350 mW maximum power dissipation in a Surface Mount SOD-123 package. This component is classified as obsolete, indicating that the original manufacturer has discontinued production. Locating equivalent or substitute parts is necessary to support ongoing maintenance, repair, and new design requirements where this diode specification remains applicable.

Substiute Parts

CZRW4697-G

Comchip TechnologyIn Stock: 1076CZRW4697-G Datasheet

Current PartRFQ

MMSZ4697-HF

Comchip TechnologyIn Stock: 961MMSZ4697-HF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CZRW4697-G is determined by the following critical parameters:

• Zener Voltage (Vz): Must be 10 V nominal with ±5% tolerance
• Package Type: Must be SOD-123 Surface Mount to ensure mechanical and electrical compatibility
• Reverse Leakage Current: Must be 1 µA @ 7.6 V
• Forward Voltage: Must be 900 mV @ 10 mA maximum
• Mounting Configuration: Must support Surface Mount assembly

The substitute part MMSZ4697-HF meets all these core electrical and mechanical requirements. The primary difference is an increased maximum power rating (500 mW versus 350 mW), which represents an enhancement rather than a deviation from the original specification. This higher power rating provides additional thermal margin and is fully compatible with applications designed for the original 350 mW part.

Parameter Comparison

Engineering Selection Recommendations

The MMSZ4697-HF is the direct substitute for the obsolete CZRW4697-G. Selection of this substitute is based on the following engineering factors:

Product Status: The MMSZ4697-HF is classified as Active, ensuring continued availability and manufacturing support from Comchip Technology. The original CZRW4697-G is obsolete and no longer produced.

Electrical Equivalence: All critical electrical parameters match the original specification. The increased power rating (500 mW versus 350 mW) is a beneficial enhancement that does not compromise compatibility with existing circuit designs.

Compliance and Certifications: The MMSZ4697-HF carries ROHS3 compliance certification and MSL Level 1 (Unlimited) moisture sensitivity rating, meeting modern regulatory and manufacturing requirements.

Package Compatibility: Both parts use identical SOD-123 Surface Mount packaging, ensuring direct mechanical substitution without PCB layout modifications.

The MMSZ4697-HF is suitable for direct replacement in all applications where the CZRW4697-G was originally specified.

Frequently Asked Questions (FAQ)

Q: Can the MMSZ4697-HF replace the CZRW4697-G in existing designs?

A: Yes. The MMSZ4697-HF is electrically and mechanically equivalent to the CZRW4697-G. All critical parameters including Zener voltage, tolerance, reverse leakage current, and forward voltage are identical. The higher power rating (500 mW) is a beneficial enhancement.

Q: What is the significance of the increased power rating in the MMSZ4697-HF?

A: The MMSZ4697-HF is rated for 500 mW maximum power dissipation compared to 350 mW in the original part. This provides additional thermal margin and allows the device to operate safely in applications with higher power requirements while maintaining full compatibility with designs limited to 350 mW.

Q: Are there any package differences between these parts?

A: No. Both the CZRW4697-G and MMSZ4697-HF use the SOD-123 Surface Mount package. No PCB modifications or requalification is required for substitution.

Q: What is the operating temperature range for the MMSZ4697-HF?

A: The MMSZ4697-HF operates across a junction temperature range of -65°C to 150°C (TJ), matching the original CZRW4697-G specification.

Q: Is the MMSZ4697-HF RoHS compliant?

A: Yes. The MMSZ4697-HF is ROHS3 compliant and carries MSL Level 1 (Unlimited) moisture sensitivity rating, meeting current regulatory and manufacturing standards.

Q: Why is the CZRW4697-G marked as obsolete?

A: The CZRW4697-G has been discontinued by the manufacturer. The MMSZ4697-HF represents the active production equivalent with identical electrical specifications and enhanced power rating.