MM5Z8V2 Equivalent & Substitute Parts

Part Overview

The MM5Z8V2 is a Zener diode manufactured by onsemi, rated at 8.2 V nominal with 200 mW maximum power dissipation in a surface mount SOD-523F package. This component is classified as obsolete, indicating discontinuation from the manufacturer. Equivalent and substitute parts are necessary to maintain design continuity, support ongoing production requirements, and ensure long-term component availability for applications utilizing this zener diode specification.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	8.2 V
Power - Max	200 mW
Tolerance	±6%
Impedance (Max)	15 Ohms
Current - Reverse Leakage @ Vr	700 nA @ 5 V
Operating Temperature	-55°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	SC-79, SOD-523F
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the MM5Z8V2 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Voltage - Zener (Nom): 8.2 V (exact match required)
Current - Reverse Leakage @ Vr: 700 nA @ 5 V (maximum allowable)
Impedance (Max): 10-15 Ohms (acceptable range)
Operating Temperature: minimum -55°C to 150°C coverage

Mechanical Compatibility Requirements:

Mounting Type: Surface Mount (required)
Package / Case: SOD-523F, SOD-523, SOD-123F, or SOD-323F (form factors with equivalent footprint density)

Power Dissipation Consideration: Substitute parts with power ratings equal to or greater than 200 mW are direct replacements. Parts with lower power ratings (100 mW) are suitable only for applications with reduced power requirements. Parts with higher power ratings (300 mW, 375 mW, 500 mW, 550 mW) provide enhanced thermal margin.

Product Status: Active status substitutes are preferred over obsolete components to ensure long-term availability and supply chain stability.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Power (Max)	Tolerance	Zzt (Max)	Package	Status	Temp Range
MM5Z8V2	onsemi	8.2 V	200 mW	±6%	15 Ohms	SOD-523F	Obsolete	-55°C ~ 150°C
MM5Z8V2T1G	onsemi	8.2 V	500 mW	±6.1%	15 Ohms	SOD-523	Active	-65°C ~ 150°C
BZT52C8V2T-TP	Micro Commercial Co	8.2 V	100 mW	±5%	15 Ohms	SOD-523	Active	-65°C ~ 150°C
BZT52H-C8V2,115	Nexperia USA Inc.	8.2 V	375 mW	±5%	10 Ohms	SOD-123F	Active	-65°C ~ 150°C
BZX584C8V2_R1_00001	Panjit International Inc.	8.2 V	200 mW	±5%	15 Ohms	SOD-523	Active	-55°C ~ 150°C
BZX585-B8V2,115	Nexperia USA Inc.	8.2 V	300 mW	±2%	10 Ohms	SOD-523	Active	-65°C ~ 150°C
BZX585-B8V2,135	Nexperia USA Inc.	8.2 V	300 mW	±2%	10 Ohms	SOD-523	Active	-65°C ~ 150°C
BZX585-C8V2,115	Nexperia USA Inc.	8.2 V	300 mW	±5%	10 Ohms	SOD-523	Active	-65°C ~ 150°C
BZX585-C8V2,135	Nexperia USA Inc.	8.2 V	300 mW	±5%	10 Ohms	SOD-523	Active	-65°C ~ 150°C
BZX84J-C8V2,115	Nexperia USA Inc.	8.2 V	550 mW	±5%	10 Ohms	SOD-323F	Active	-65°C ~ 150°C
PZU8.2B,115	Nexperia USA Inc.	8.2 V	310 mW	±5%	10 Ohms	SOD-323F	Active	-65°C ~ 150°C

Engineering Selection Recommendations

Direct Replacement (Same Package, Equal or Greater Power):

MM5Z8V2T1G (onsemi) is the primary direct replacement. This part maintains the same base product number (MM5Z8), operates at identical nominal voltage (8.2 V), and provides enhanced power dissipation (500 mW versus 200 mW). The component is active status with RoHS3 compliance and extended temperature range (-65°C to 150°C). Tape & Reel packaging supports production environments.

BZX584C8V2_R1_00001 (Panjit International Inc.) provides equivalent electrical performance with matching 200 mW power rating and SOD-523 package. This part maintains identical operating temperature range (-55°C to 150°C) as the original MM5Z8V2 and is active status with RoHS3 compliance.

Enhanced Performance Substitutes (Higher Power Rating, Same Package):

BZX585-B8V2,115 and BZX585-B8V2,135 (Nexperia USA Inc.) offer 300 mW power dissipation in SOD-523 package with superior voltage tolerance (±2% versus ±6%). Both parts carry automotive qualification (AEC-Q101 or AEC-Q100) and active status. Lower impedance (10 Ohms) provides improved regulation characteristics.

BZX585-C8V2,115 and BZX585-C8V2,135 (Nexperia USA Inc.) provide 300 mW power dissipation with ±5% tolerance, automotive qualification, and active status. These parts are suitable for applications requiring enhanced thermal margin with maintained voltage tolerance.

Alternative Package Substitutes (Different Form Factor):

BZT52H-C8V2,115 (Nexperia USA Inc.) uses SOD-123F package with 375 mW power rating and automotive qualification (AEC-Q101). This substitute accommodates designs with different PCB layout constraints while maintaining electrical specifications.

BZX84J-C8V2,115 (Nexperia USA Inc.) uses SOD-323F package with 550 mW power rating and automotive qualification (AEC-Q101). This larger package option provides maximum thermal performance for power-constrained applications.

PZU8.2B,115 (Nexperia USA Inc.) uses SOD-323F package with 310 mW power rating and automotive qualification (AEC-Q100). This part offers automotive-grade reliability with alternative form factor.

Limited Power Application Substitute:

BZT52C8V2T-TP (Micro Commercial Co) provides 100 mW power dissipation in SOD-523 package. This substitute is suitable only for applications with reduced power requirements and lower thermal stress. Active status and RoHS3 compliance are confirmed.

Frequently Asked Questions (FAQ)

Q: Can MM5Z8V2T1G directly replace MM5Z8V2 in all applications?

A: Yes, MM5Z8V2T1G is a direct replacement. Both parts share the same base product number (MM5Z8), identical nominal voltage (8.2 V), and compatible SOD-523 package. The substitute provides higher power dissipation (500 mW versus 200 mW), which is advantageous for thermal performance. Extended temperature range (-65°C to 150°C) covers the original specification (-55°C to 150°C).

Q: What is the difference between BZX585-B8V2,115 and BZX585-C8V2,115?

A: Both parts provide 300 mW power dissipation in SOD-523 package with automotive qualification and active status. The primary difference is voltage tolerance: BZX585-B8V2 series specifies ±2% tolerance, while BZX585-C8V2 series specifies ±5% tolerance. Applications requiring tighter voltage regulation should use the B-series variant.

Q: Are package changes between SOD-523 and SOD-323F compatible with existing PCB layouts?

A: No. SOD-523 and SOD-323F packages have different physical dimensions and footprints. BZX84J-C8V2,115 and PZU8.2B,115 use SOD-323F package and require PCB redesign. These substitutes are suitable only for new designs or boards with modified layouts. For existing PCB compatibility, select substitutes with SOD-523 or SOD-523F packages.

Q: Why does BZT52C8V2T-TP have lower power rating (100 mW) than the original MM5Z8V2 (200 mW)?

A: BZT52C8V2T-TP is a lower-power variant suitable for applications with reduced thermal requirements. This substitute is not recommended for designs operating at the original 200 mW specification. Use this part only when circuit analysis confirms power dissipation remains below 100 mW.

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

A: Automotive qualification indicates the part meets automotive industry reliability and testing standards. BZX585-B8V2,115, BZX585-B8V2,135, BZX585-C8V2,115, BZX585-C8V2,135, BZT52H-C8V2,115, BZX84J-C8V2,115, and PZU8.2B,115 carry automotive qualification. These parts are suitable for automotive and high-reliability applications. Non-qualified parts (MM5Z8V2T1G, BZT52C8V2T-TP, BZX584C8V2_R1_00001) are suitable for general industrial and consumer applications.

Q: Is RoHS3 compliance required for all substitutes?

A: All listed substitute parts carry RoHS3 compliance. This compliance status ensures compatibility with environmental regulations and supply chain requirements. The original MM5Z8V2 does not specify RoHS status, but all active substitutes meet current RoHS3 standards.

Q: Can I use BZX585-B8V2,115 and BZX585-B8V2,135 interchangeably?

A: Yes. Both parts are electrically and mechanically identical, with matching 8.2 V nominal voltage, 300 mW power rating, ±2% tolerance, SOD-523 package, and automotive qualification. The numerical suffix (115 versus 135) indicates different manufacturing batches or date codes but does not affect electrical performance or compatibility.

Q: What is the impedance difference between MM5Z8V2 (15 Ohms) and BZX585 series (10 Ohms)?

A: Lower impedance (10 Ohms) in BZX585 series provides improved voltage regulation and faster transient response compared to the original 15 Ohms specification. This is a performance enhancement suitable for applications requiring superior regulation characteristics. The lower impedance does not create compatibility issues and is generally beneficial.

Q: Are all substitute parts available in Tape & Reel packaging for production environments?

A: Yes. All listed substitute parts are available in Tape & Reel (TR) packaging, supporting automated assembly and production requirements. Packaging format is consistent across all active substitutes.

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