MM5Z2V4ST1 Equivalent & Substitute Parts

Part Overview

The MM5Z2V4ST1 is a Zener diode rated at 2.53 V nominal with 200 mW maximum power dissipation in a surface mount SOD-523 package. This component is classified as obsolete, making identification of suitable substitutes necessary for ongoing design support and production continuity. The part is manufactured by onsemi and is RoHS non-compliant, which may impact applications subject to environmental regulations.

Substiute Parts

MM5Z2V4ST1

onsemiIn Stock: 665MM5Z2V4ST1 Datasheet

Current PartRFQ

MM5Z2V4ST1G

onsemiIn Stock: 32181MM5Z2V4ST1G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MM5Z2V4ST1 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Zener voltage (Vz) must equal 2.53 V nominal
• Voltage tolerance must be ±4%
• Reverse leakage current must not exceed 120 µA @ 1 V
• Forward voltage must not exceed 900 mV @ 10 mA
• Impedance (Zzt) must not exceed 100 Ohms
• Operating temperature range must encompass -65°C ~ 150°C

Mechanical Compatibility Requirements:

• Package must be SOD-523 (SC-79)
• Mounting type must be Surface Mount

Substitution Logic: The MM5Z2V4ST1G qualifies as a direct substitute because it maintains identical electrical specifications for all critical parameters while offering enhanced power dissipation capability (500 mW versus 200 mW). This increased power rating provides design margin without altering circuit behavior. Both parts share the same base product number (MM5Z2), zener voltage, tolerance, impedance, leakage characteristics, forward voltage, temperature range, and package configuration.

Parameter Comparison

Engineering Selection Recommendations

MM5Z2V4ST1G Selection Basis:

The MM5Z2V4ST1G is the appropriate substitute for the obsolete MM5Z2V4ST1. Selection is justified on the following grounds:

1. Product Status: The MM5Z2V4ST1G maintains active product status, ensuring continued availability and manufacturing support, whereas the MM5Z2V4ST1 is obsolete.

2. Regulatory Compliance: The MM5Z2V4ST1G is ROHS3 compliant, meeting current environmental standards. The original part is RoHS non-compliant, which may restrict use in regulated applications.

3. Electrical Equivalence: All critical electrical parameters are identical between the two parts, including zener voltage, tolerance, impedance, leakage current, forward voltage, and operating temperature range.

4. Enhanced Power Rating: The MM5Z2V4ST1G provides 500 mW maximum power dissipation compared to 200 mW in the original part. This increased rating does not alter circuit operation and provides additional thermal margin.

5. Package Compatibility: Both parts use the SOD-523 package with identical mechanical footprints, enabling direct board-level substitution without layout modification.

Frequently Asked Questions (FAQ)

Q: Can MM5Z2V4ST1G be used as a direct replacement for MM5Z2V4ST1?

A: Yes. The MM5Z2V4ST1G is a direct substitute. All electrical parameters that define circuit behavior are identical, including zener voltage (2.53 V), tolerance (±4%), impedance (100 Ohms maximum), leakage current (120 µA @ 1 V), and forward voltage (900 mV @ 10 mA). The package and mounting type are identical.

Q: What is the difference between these two parts?

A: The primary differences are product status, compliance certification, and power rating. The MM5Z2V4ST1G is an active product with ROHS3 compliance and 500 mW power dissipation, while the MM5Z2V4ST1 is obsolete, RoHS non-compliant, and rated at 200 mW. These differences do not affect electrical circuit operation.

Q: Does the higher power rating of MM5Z2V4ST1G affect circuit behavior?

A: No. The higher power rating (500 mW versus 200 mW) does not alter the electrical characteristics that determine circuit operation. The zener voltage, tolerance, impedance, and all other electrical parameters remain identical. The increased power rating provides additional thermal margin without changing circuit performance.

Q: Are the packages identical?

A: Yes. Both parts use the SOD-523 package (SC-79 case). The mechanical footprint, pin configuration, and mounting requirements are identical, enabling direct board-level substitution.

Q: Is RoHS compliance important for my application?

A: RoHS compliance depends on application requirements and regulatory jurisdiction. The MM5Z2V4ST1G is ROHS3 compliant, while the MM5Z2V4ST1 is not. If your application or market requires RoHS compliance, the MM5Z2V4ST1G is the appropriate choice.

Q: Can I use MM5Z2V4ST1G in designs originally specified for MM5Z2V4ST1?

A: Yes. The MM5Z2V4ST1G is fully compatible with designs specified for MM5Z2V4ST1. All electrical parameters are identical, and the package is the same. No circuit modifications are required.