CZRW4686-G Equivalent & Substitute Parts Reference

Part Overview

The CZRW4686-G from Comchip Technology is a Zener Diode classified under Diodes, Zener, presented in a SOD-123 surface mount package. This component features a nominal Zener voltage of 3.9 V, a maximum power dissipation of 350 mW, and a reverse leakage current of 5 µA at 2 V. The part is currently listed as Obsolete, necessitating the identification of alternate models for both new designs and ongoing maintenance. Substitute selection is strictly governed by electrical characteristics, package compatibility, and mounting type as specified.

Key Parameters

Parameter	CZRW4686-G
Voltage - Zener (Nom) (Vz)	3.9 V
Tolerance	±5.13%
Power - Max	350 mW
Current - Reverse Leakage @ Vr	5 µA @ 2 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA
Operating Temperature	-65°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	SOD-123
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute selection for CZRW4686-G is strictly based on the following parameters: Zener voltage (nominal), tolerance, maximum power dissipation, reverse leakage current at specified voltage, forward voltage at specified current, operating temperature range, mounting type, and package/case. All listed parameters must match or exceed those of the main part to qualify as a direct substitute in the Diodes, Zener category.

Parameter Comparison

Parameter	CZRW4686-G	MMSZ4686-HF
Voltage - Zener (Nom) (Vz)	3.9 V	3.9 V
Tolerance	±5.13%	±5%
Power - Max	350 mW	500 mW
Current - Reverse Leakage @ Vr	5 µA @ 2 V	5 µA @ 2 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	-65°C ~ 150°C (TJ)	150°C (TJ)
Mounting Type	Surface Mount	Surface Mount
Package / Case	SOD-123	SOD-123

Engineering Selection Recommendations

The CZRW4686-G Zener Diode is listed as Obsolete. The substitute part MMSZ4686-HF is currently Active and ROHS3 Compliant. Both share identical voltage, tolerance, leakage current, forward voltage, mounting type, and package/case specifications. Use of MMSZ4686-HF is supported by available compliance information and unrestricted product status.

Frequently Asked Questions (FAQ)

Q1: What criteria must be met for a substitute Zener Diode in SOD-123 to qualify as equivalent?
A1: Substitution requires matching Zener voltage, tolerance, maximum power dissipation, reverse leakage current at the specified voltage, forward voltage at the specified current, operating temperature, mounting type, and package/case.

Q2: Does package compatibility affect the suitability of a substitute?
A2: Yes. Both the main part and substitute must use the SOD-123 surface mount package to maintain mechanical and automated assembly compatibility.

Q3: Is the MMSZ4686-HF a drop-in replacement for CZRW4686-G?
A3: The MMSZ4686-HF meets or exceeds all listed electrical and mechanical parameters and is provided in the same package type, qualifying it as an equivalent substitute.

Q4: Are there differences in environmental or compliance status?
A4: MMSZ4686-HF is ROHS3 Compliant and has an unlimited moisture sensitivity level (MSL 1).

Q5: How critical is the product status when selecting a replacement?
A5: Product status is critical. Selection should prioritize components that are currently Active over Obsolete components to ensure continued availability and support.

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