Equivalent & Substitute Parts for MM3Z8V2ST1

Part Overview

The MM3Z8V2ST1 is a Zener diode rated at 8.2 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, equivalent and substitute parts with active product status are necessary for new designs and ongoing production requirements. Substitute components maintain the core electrical characteristics while offering improved availability and compliance certifications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	8.2	V
Tolerance	±2%	-
Power - Max	200	mW
Impedance (Max)	15	Ohms
Current - Reverse Leakage @ Vr	700	nA @ 5 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-65 to 150	°C
Mounting Type	Surface Mount	-
Package / Case	SC-76, SOD-323	-
Product Status	Obsolete	-
RoHS Status	RoHS non-compliant	-

Substitute Part Grouping Explanation

Substitution of the MM3Z8V2ST1 is determined by the following critical parameters:

Electrical Compatibility Requirements:

Zener voltage nominal value: 8.2 V
Voltage tolerance: ±2% or tighter
Operating temperature range: minimum -65°C to 150°C
Package type: SOD-323 surface mount

Power Rating Consideration: The MM3Z8V2ST1 specifies 200 mW maximum power dissipation. Substitute parts with equal or higher power ratings (300 mW, 320 mW) are functionally compatible, as they provide equal or superior thermal performance in the same package footprint.

Compliance and Availability: Substitute parts must have active product status and RoHS3 compliance to meet current manufacturing and regulatory requirements.

Parameter Comparison

Parameter	MM3Z8V2ST1	MM3Z8V2ST1G	BZX384-B8V2,115	PZU8.2BA,115
Manufacturer	onsemi	onsemi	Nexperia USA Inc.	Nexperia USA Inc.
Voltage - Zener (Nom)	8.2 V	8.2 V	8.2 V	8.2 V
Tolerance	±2%	±2%	±2%	±5%
Power - Max	200 mW	300 mW	300 mW	320 mW
Impedance (Max)	15 Ohms	15 Ohms	15 Ohms	10 Ohms
Current - Reverse Leakage @ Vr	700 nA @ 5 V	700 nA @ 5 V	700 nA @ 5 V	500 nA @ 5 V
Operating Temperature	-65 to 150°C	-65 to 150°C	-65 to 150°C	-55 to 150°C
Package / Case	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: MM3Z8V2ST1G

The MM3Z8V2ST1G is the direct equivalent from onsemi with active product status. This part maintains identical electrical specifications (8.2 V, ±2% tolerance, 15 Ohms impedance) while offering 300 mW power rating and ROHS3 compliance. The increased power rating provides thermal margin without affecting circuit performance. This part is recommended for designs requiring onsemi component continuity.

Alternative Substitute: BZX384-B8V2,115

The BZX384-B8V2,115 from Nexperia USA Inc. provides equivalent electrical performance with 300 mW power rating and ROHS3 compliance. Zener voltage, tolerance, impedance, and operating temperature range match the original specification. This part is suitable for applications where cross-manufacturer sourcing is acceptable.

Secondary Alternative: PZU8.2BA,115

The PZU8.2BA,115 from Nexperia USA Inc. offers 320 mW power rating with improved impedance (10 Ohms) and lower reverse leakage (500 nA). The voltage tolerance is ±5%, which is wider than the original ±2% specification. The operating temperature minimum is -55°C, which is 10°C higher than the original specification. This part is suitable for applications where the relaxed tolerance and higher minimum operating temperature are acceptable.

Frequently Asked Questions (FAQ)

Q: Can MM3Z8V2ST1G be used as a direct replacement for MM3Z8V2ST1?

A: Yes. The MM3Z8V2ST1G maintains identical zener voltage (8.2 V), tolerance (±2%), impedance (15 Ohms), and operating temperature range (-65°C to 150°C). The increased power rating (300 mW vs. 200 mW) is compatible with the original circuit design. Both parts use the SOD-323 package with identical pinout and footprint.

Q: What is the difference between the onsemi and Nexperia substitutes?

A: Both manufacturers provide 8.2 V zener diodes in SOD-323 packages with active product status and ROHS3 compliance. The primary differences are manufacturer-specific characteristics such as forward voltage specifications and impedance values. All three substitute parts meet the core electrical requirements of the original MM3Z8V2ST1.

Q: Is the PZU8.2BA,115 suitable for all applications?

A: The PZU8.2BA,115 has a voltage tolerance of ±5% compared to the original ±2%, and a minimum operating temperature of -55°C compared to -65°C. Applications requiring the tighter ±2% tolerance or operation below -55°C should use MM3Z8V2ST1G or BZX384-B8V2,115 instead.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts are supplied in SOD-323 surface mount packages. MM3Z8V2ST1G and BZX384-B8V2,115 are available in Tape & Reel (TR) packaging. PZU8.2BA,115 is also available in Tape & Reel (TR) packaging. Verify specific packaging requirements with your procurement specification.

Q: Why is the original MM3Z8V2ST1 marked as obsolete?

A: The MM3Z8V2ST1 is classified as obsolete product status. Substitute parts with active product status ensure long-term availability and compliance with current regulatory requirements including ROHS3 certification.

Q: Can I use a higher power-rated zener diode in place of the 200 mW original?

A: Yes. The MM3Z8V2ST1G (300 mW) and BZX384-B8V2,115 (300 mW) provide higher power ratings in the same SOD-323 package. Higher power ratings do not negatively affect circuit operation; they provide additional thermal margin. The electrical characteristics (voltage, impedance, leakage) remain compatible with the original design.

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