MM5Z22V Zener Diode Equivalent & Substitute Parts

Part Overview

The MM5Z22V is a 22 V zener diode manufactured by onsemi, rated for 200 mW power dissipation in a surface mount SOD-523F package. This component is classified as obsolete, indicating that direct procurement from the original manufacturer may be limited or unavailable. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or repair requirements. Substitute parts must maintain electrical compatibility across voltage rating, power dissipation, impedance, and thermal operating range while accommodating package form factor constraints.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	22	V
Tolerance	±6%	-
Power - Max	200	mW
Impedance (Max)	55	Ohms
Current - Reverse Leakage @ Vr	50	nA @ 15.4 V
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	-
Package / Case	SOD-523F	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the MM5Z22V is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): Must equal 22 V
Mounting Type: Must be Surface Mount
Operating Temperature Range: Must encompass or exceed -55°C to 150°C
Impedance (Max): Must not exceed 55 Ohms
Current - Reverse Leakage @ Vr: Must not exceed 50 nA @ 15.4 V (where specified)

Secondary Compatibility Factors:

Power - Max: Substitute parts rated at 200 mW or higher are acceptable
Tolerance: Substitute parts with ±2%, ±5%, or ±6% tolerance are acceptable
Package / Case: SOD-523F (SC-79) is preferred; SOD-323 (SC-76) and SOD-323F (SC-90) are acceptable with board layout verification

Compliance Considerations:

RoHS3 Compliance: Preferred for new designs
Automotive Grade / AEC Qualification: Available for applications requiring automotive-grade reliability

Substitute parts are grouped by package compatibility and power rating to facilitate selection based on specific application requirements.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Ir @ Vr (nA)	Temp Range (°C)	Package	Status
MM5Z22V	onsemi	22	±6%	200	55	50 @ 15.4V	-55 to 150	SOD-523F	Obsolete
MM3Z22VT1G	onsemi	22	±5%	300	55	50 @ 15.4V	-65 to 150	SOD-323	Active
BZX584B22-TP	Micro Commercial Co	22	±2%	150	55	100 @ 15.4V	-55 to 150	SOD-523	Active
BZX584C22_R1_00001	Panjit International Inc.	22	±5%	200	55	100 @ 15.4V	-55 to 150	SOD-523	Active
BZX585-B22,115	Nexperia USA Inc.	22	±2%	300	55	50 @ 15.4V	-65 to 150	SOD-523	Active
BZX585-C22,115	Nexperia USA Inc.	22	±5%	300	55	50 @ 15.4V	-65 to 150	SOD-523	Active
BZX84J-B22,115	NXP USA Inc.	22	±2%	550	25	50 @ 15.4V	-65 to 150	SOD-323F	Active

Engineering Selection Recommendations

Direct Package Replacement (SOD-523F / SOD-523):

BZX584C22_R1_00001 (Panjit International Inc.) provides the closest electrical match to the MM5Z22V with identical 22 V rating, 200 mW power dissipation, and 55 Ohm impedance. This part maintains the same operating temperature range (-55°C to 150°C) and is available in active production status with RoHS3 compliance. The SOD-523 package is mechanically compatible with SOD-523F footprints.

BZX585-C22,115 (Nexperia USA Inc.) offers enhanced specifications with 300 mW power rating, ±5% tolerance, and extended temperature range (-65°C to 150°C). This part includes automotive-grade qualification (AEC-Q100) and is suitable for applications requiring higher reliability margins. The SOD-523 package maintains board-level compatibility.

Higher Power Rating Alternative (SOD-523):

BZX585-B22,115 (Nexperia USA Inc.) provides 300 mW power dissipation with ±2% tolerance and automotive-grade qualification (AEC-Q100). This part is appropriate for designs requiring tighter voltage tolerance and higher thermal headroom.

Compact Package Alternative (SOD-323):

MM3Z22VT1G (onsemi) delivers 300 mW power dissipation in a smaller SOD-323 package with ±5% tolerance and extended temperature range (-65°C to 150°C). This option is suitable for space-constrained applications where the reduced package size is acceptable.

High-Performance Alternative (SOD-323F):

BZX84J-B22,115 (NXP USA Inc.) offers the highest power rating (550 mW) with the lowest impedance (25 Ohms), ±2% tolerance, and automotive-grade qualification (AEC-Q101). This part is appropriate for applications requiring superior thermal performance and tighter voltage regulation.

Limited Power Rating Option:

BZX584B22-TP (Micro Commercial Co) provides 150 mW power dissipation in SOD-523 package with ±2% tolerance. This part is suitable only for applications where the original 200 mW rating can be reduced without performance degradation.

Frequently Asked Questions (FAQ)

Q: Can MM3Z22VT1G replace MM5Z22V directly on the PCB?

A: MM3Z22VT1G uses SOD-323 package while MM5Z22V uses SOD-523F package. These packages have different footprints and pin spacing. Board layout modification is required. However, electrical parameters are compatible: both maintain 22 V zener voltage, 55 Ohm impedance, and 50 nA reverse leakage current.

Q: What is the difference between BZX584C22_R1_00001 and BZX585-C22,115?

A: Both parts maintain 22 V zener voltage and 55 Ohm impedance. BZX584C22_R1_00001 (Panjit) operates at -55°C to 150°C with 200 mW rating. BZX585-C22,115 (Nexperia) operates at -65°C to 150°C with 300 mW rating and includes automotive-grade qualification (AEC-Q100). The Nexperia part provides extended temperature range and higher power margin.

Q: Is BZX584B22-TP suitable as a substitute if the application only requires 150 mW?

A: BZX584B22-TP is electrically compatible with 22 V zener voltage, 55 Ohm impedance, and SOD-523 package. However, the 150 mW power rating is lower than the original 200 mW specification. This part is acceptable only if circuit analysis confirms that actual power dissipation does not exceed 150 mW under all operating conditions.

Q: What are the advantages of BZX84J-B22,115 over other substitutes?

A: BZX84J-B22,115 offers the highest power dissipation (550 mW) and lowest impedance (25 Ohms) among available substitutes. It includes automotive-grade qualification (AEC-Q101) and operates across -65°C to 150°C. These specifications provide superior thermal performance and voltage regulation stability. The SOD-323F package is more compact than SOD-523 while maintaining higher power capability.

Q: Are all substitute parts RoHS3 compliant?

A: All active substitute parts listed are RoHS3 compliant. The original MM5Z22V is obsolete and RoHS compliance status is not specified. For new designs or applications requiring RoHS3 compliance, any of the active substitute parts are acceptable.

Q: Which substitute part has the tightest voltage tolerance?

A: BZX584B22-TP, BZX585-B22,115, and BZX84J-B22,115 all offer ±2% tolerance, compared to the original MM5Z22V at ±6%. These parts provide tighter voltage regulation and are suitable for applications requiring precise zener voltage control.

Q: Can I use a higher power-rated substitute in place of the 200 mW MM5Z22V?

A: Yes. Substitutes rated at 300 mW or 550 mW are electrically compatible and will function correctly in circuits designed for 200 mW operation. Higher power ratings provide additional thermal margin and do not degrade circuit performance. Package footprint compatibility must be verified independently.

Q: What is the significance of automotive-grade qualification (AEC-Q100 / AEC-Q101)?

A: Automotive-grade qualification indicates that the part meets stringent reliability and environmental testing standards required for automotive applications. BZX585-B22,115 and BZX585-C22,115 carry AEC-Q100 qualification; BZX84J-B22,115 carries AEC-Q101 qualification. These parts are suitable for automotive and high-reliability applications.

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