MM3Z6V2ST1 Equivalent & Substitute Parts

Part Overview

The MM3Z6V2ST1 is a Zener diode rated at 6.2 V nominal with 200 mW maximum power dissipation in a surface mount SOD-323 package. Manufactured by onsemi, this component is classified as obsolete product status. Due to its obsolete designation, identifying equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	6.2 V
Tolerance	±2%
Power - Max	200 mW
Impedance (Max)	10 Ohms
Current - Reverse Leakage @ Vr	3 µA @ 4 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA
Operating Temperature	-65°C ~ 150°C
Package / Case	SC-76, SOD-323
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the MM3Z6V2ST1 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Zener voltage nominal value: 6.2 V
Zener voltage tolerance: ±2% or tighter
Maximum power dissipation: equal to or greater than 200 mW
Impedance (Max): 10 Ohms or less
Reverse leakage current: 3 µA @ 4 V or less
Operating temperature range: -65°C to 150°C minimum

Mechanical Compatibility Requirements:

Package type: SOD-323 (SC-76)
Mounting type: Surface Mount

Substitute parts must satisfy all electrical parameters within the specified tolerances and maintain identical mechanical form factor and mounting characteristics. Parts with higher power ratings are acceptable as they provide design margin. Parts with tighter voltage tolerances are acceptable as they exceed the original specification.

Parameter Comparison

Parameter	MM3Z6V2ST1	MM3Z6V2ST1G	BZX384-B6V2,115	BZX384-C6V2,115
Manufacturer	onsemi	onsemi	Nexperia USA Inc.	Nexperia USA Inc.
Voltage - Zener (Nom)	6.2 V	6.2 V	6.2 V	6.2 V
Tolerance	±2%	±2%	±2%	±5%
Power - Max	200 mW	300 mW	300 mW	300 mW
Impedance (Max)	10 Ohms	10 Ohms	10 Ohms	10 Ohms
Current - Reverse Leakage @ Vr	3 µA @ 4 V	3 µA @ 4 V	3 µA @ 4 V	3 µA @ 4 V
Operating Temperature	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Package / Case	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

MM3Z6V2ST1G (onsemi) is the primary direct substitute. This part maintains identical electrical specifications with ±2% tolerance and equivalent impedance characteristics. The power rating is increased to 300 mW, providing additional thermal margin. MM3Z6V2ST1G carries active product status and ROHS3 compliance, addressing the obsolescence and regulatory limitations of the original MM3Z6V2ST1.

BZX384-B6V2,115 (Nexperia USA Inc.) is a cross-manufacturer equivalent with identical electrical performance. This part meets all electrical requirements with ±2% tolerance and 300 mW power rating. It is available in Cut Tape and Digi-Reel packaging and carries ROHS3 compliance and active product status.

BZX384-C6V2,115 (Nexperia USA Inc.) is an alternative cross-manufacturer option with relaxed voltage tolerance of ±5%. This part satisfies all other electrical parameters and provides 300 mW power dissipation. Selection of this part is appropriate when the ±5% tolerance specification is acceptable for the application. ROHS3 compliance and active product status are confirmed.

All three substitute parts are electrically and mechanically compatible with the MM3Z6V2ST1 within the specified parameter ranges. Selection between substitutes depends on packaging requirements, supply chain preferences, and tolerance specifications for the target application.

Frequently Asked Questions (FAQ)

Q: Can MM3Z6V2ST1G directly replace MM3Z6V2ST1 in existing designs?

A: Yes. MM3Z6V2ST1G maintains identical zener voltage (6.2 V), voltage tolerance (±2%), impedance (10 Ohms maximum), and reverse leakage characteristics (3 µA @ 4 V). The increased power rating (300 mW versus 200 mW) is a design improvement. Both parts use the SOD-323 package and surface mount configuration.

Q: What is the difference between BZX384-B6V2,115 and BZX384-C6V2,115?

A: The primary difference is voltage tolerance. BZX384-B6V2,115 specifies ±2% tolerance, matching the original MM3Z6V2ST1 specification. BZX384-C6V2,115 specifies ±5% tolerance. Both parts share identical zener voltage (6.2 V), power rating (300 mW), impedance (10 Ohms), and reverse leakage characteristics. Selection depends on tolerance requirements for the application.

Q: Are all substitute parts RoHS compliant?

A: Yes. MM3Z6V2ST1G, BZX384-B6V2,115, and BZX384-C6V2,115 all carry ROHS3 compliance certification. The original MM3Z6V2ST1 is RoHS non-compliant. Substitution with any of these parts addresses regulatory compliance requirements.

Q: Do packaging options differ between substitute parts?

A: Yes. MM3Z6V2ST1G is supplied in Tape & Reel (TR) packaging. BZX384-B6V2,115 is supplied in Cut Tape (CT) and Digi-Reel packaging. BZX384-C6V2,115 is supplied in Tape & Reel (TR) packaging. All parts use the SOD-323 package form factor. Packaging selection depends on production volume and assembly equipment compatibility.

Q: Can I use a substitute part with higher power rating?

A: Yes. All substitute parts are rated at 300 mW, exceeding the original 200 mW specification. Higher power ratings provide thermal margin and do not compromise circuit function when electrical characteristics (voltage, impedance, leakage) remain within specification.

Q: What is the product status significance?

A: The original MM3Z6V2ST1 is classified as obsolete, indicating discontinued manufacturing and limited future availability. All substitute parts carry active product status, ensuring continued supply and manufacturing support for new production requirements.

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