MM5Z2V4 Equivalent & Substitute Parts

Part Overview

The MM5Z2V4 is a Zener diode manufactured by onsemi, rated at 2.4 V nominal with 200 mW maximum 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 requirements for applications utilizing this Zener diode specification.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	2.4	V
Tolerance	±8%	—
Power - Max	200	mW
Impedance (Max)	100	Ohms
Current - Reverse Leakage @ Vr	50	µA @ 1 V
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SC-79, SOD-523F	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MM5Z2V4 is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 2.4 V nominal
Reverse leakage current: 50 µA @ 1 V
Impedance (Max): 100 Ohms
Mounting type: Surface Mount
Moisture sensitivity: MSL 1 (Unlimited)

Secondary Compatibility Factors:

Power rating: Equal to or greater than 200 mW
Tolerance: ±8% or tighter
Operating temperature range: Minimum -55°C to +150°C
Package compatibility: SOD-523 or SOD-523F (same footprint family)

Substitute parts are grouped into two categories:

Direct Equivalents (Same Package SOD-523/SOD-523F): Parts meeting all primary criteria with identical or superior power ratings and package compatibility. These include MM5Z2V4T1G, BZX584C2V4_R1_00001, BZX585-B2V4,115, BZX585-B2V4,135, BZX585-C2V4,115, and BZX585-C2V4,135.

Package Variant Substitutes (Different Package): Parts meeting all primary electrical criteria but in alternative surface mount packages (SOD-323F). These include BZX84J-C2V4,115 and BZX84J-B2V4,115. Package variant substitutes require PCB layout modification and are suitable only when physical space constraints permit the larger footprint.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Package	Temp Range	Status
MM5Z2V4	onsemi	2.4 V	±8%	200 mW	100 Ω	SOD-523F	-55 to 150°C	Obsolete
MM5Z2V4T1G	onsemi	2.4 V	±8.3%	500 mW	100 Ω	SOD-523	-65 to 150°C	Active
BZX584C2V4_R1_00001	Panjit International Inc.	2.4 V	±5%	200 mW	100 Ω	SOD-523	-55 to 150°C	Active
BZX585-B2V4,115	Nexperia USA Inc.	2.4 V	±2%	300 mW	100 Ω	SOD-523	-65 to 150°C	Active
BZX585-B2V4,135	Nexperia USA Inc.	2.4 V	±2%	300 mW	100 Ω	SOD-523	-65 to 150°C	Active
BZX585-C2V4,115	Nexperia USA Inc.	2.4 V	±5%	300 mW	100 Ω	SOD-523	-65 to 150°C	Active
BZX585-C2V4,135	Nexperia USA Inc.	2.4 V	±5%	300 mW	100 Ω	SOD-523	-65 to 150°C	Active
BZT52H-C2V4,115	NXP Semiconductors	2.4 V	±5%	375 mW	85 Ω	SOD-123F	-65 to 150°C	Active
BZX84J-B2V4,115	Nexperia USA Inc.	2.4 V	±2%	550 mW	100 Ω	SOD-323F	-65 to 150°C	Active
BZX84J-C2V4,115	Nexperia USA Inc.	2.4 V	±5%	550 mW	100 Ω	SOD-323F	-65 to 150°C	Active

Engineering Selection Recommendations

For Direct Replacement (No PCB Modification Required):

Select from parts with SOD-523 or SOD-523F packaging: MM5Z2V4T1G, BZX584C2V4_R1_00001, BZX585-B2V4,115, BZX585-B2V4,135, BZX585-C2V4,115, or BZX585-C2V4,135. All maintain identical footprint compatibility with the original MM5Z2V4.

MM5Z2V4T1G (onsemi) is the direct successor from the original manufacturer, offering active product status, extended operating temperature range (-65°C to 150°C), and increased power rating (500 mW). This part is recommended as the primary replacement when supply is available.

BZX585-B2V4,115 and BZX585-B2V4,135 (Nexperia USA Inc.) provide tighter tolerance (±2%), automotive-grade qualification (AEC-Q100), and active status. These parts are suitable for applications requiring enhanced voltage stability and automotive compliance.

BZX585-C2V4,115 and BZX585-C2V4,135 (Nexperia USA Inc.) offer automotive-grade qualification (AEC-Q100) with ±5% tolerance matching the original specification tolerance band. These parts provide good availability and compliance for automotive applications.

BZX584C2V4_R1_00001 (Panjit International Inc.) matches the original 200 mW power rating and operating temperature range with improved tolerance (±5%). This part is suitable for cost-sensitive applications with identical thermal requirements.

For Applications Permitting Package Change:

BZT52H-C2V4,115 (NXP Semiconductors) in SOD-123F package provides automotive qualification (AEC-Q101), higher power rating (375 mW), and improved impedance (85 Ω). This part requires PCB layout modification due to different footprint.

BZX84J-B2V4,115 and BZX84J-C2V4,115 (Nexperia USA Inc.) in SOD-323F package offer the highest power rating (550 mW), automotive qualification (AEC-Q101), and extended temperature range. These parts require PCB redesign and are suitable only when thermal or power margin improvements justify layout modification.

Compliance Considerations:

All recommended substitute parts are RoHS3 compliant and REACH unaffected. Parts designated as automotive-grade (BZX585 series, BZT52H, BZX84J series) carry AEC-Q100 or AEC-Q101 qualification and are suitable for automotive applications. Non-automotive applications may select from any active-status part based on availability and cost.

Frequently Asked Questions (FAQ)

Q: Can MM5Z2V4T1G directly replace MM5Z2V4 without PCB modification?

A: Yes. MM5Z2V4T1G uses the same SOD-523 package footprint as the original MM5Z2V4. No PCB layout changes are required. The part offers superior specifications including higher power rating (500 mW vs. 200 mW) and extended temperature range (-65°C to 150°C vs. -55°C to 150°C).

Q: What is the difference between BZX585-B2V4,115 and BZX585-C2V4,115?

A: Both parts are identical in electrical performance and package. The primary difference is tolerance: BZX585-B2V4,115 specifies ±2% tolerance, while BZX585-C2V4,115 specifies ±5% tolerance. Both carry automotive qualification (AEC-Q100) and are active products. Selection depends on voltage accuracy requirements for the application.

Q: Why do BZX585-B2V4,115 and BZX585-B2V4,135 have the same specifications but different part numbers?

A: The suffix ",115" and ",135" indicate different packaging or tape reel configurations from Nexperia. Electrical specifications are identical. Verify packaging requirements with your procurement system before ordering.

Q: Can BZT52H-C2V4,115 be used as a direct replacement?

A: BZT52H-C2V4,115 is electrically compatible but uses SOD-123F package instead of SOD-523F. The footprint is larger and requires PCB layout modification. This part is suitable only if physical space on the PCB permits the larger package. Verify PCB design constraints before selection.

Q: Are BZX84J series parts suitable for my application?

A: BZX84J-B2V4,115 and BZX84J-C2V4,115 are electrically compatible but use SOD-323F package, which is larger than SOD-523F. These parts require PCB redesign and are recommended only when increased power dissipation (550 mW) or improved thermal performance justifies layout modification. Verify PCB space availability before selection.

Q: What is the impact of selecting a part with higher power rating?

A: Parts with higher power ratings (MM5Z2V4T1G at 500 mW, BZX585 series at 300 mW, BZX84J series at 550 mW) are fully compatible with applications designed for the 200 mW MM5Z2V4. Higher power ratings provide additional thermal margin and do not negatively affect circuit performance. Selection of higher-rated parts is acceptable and often beneficial for reliability.

Q: Which substitute part offers the best voltage accuracy?

A: BZX585-B2V4,115 and BZX585-B2V4,135 offer the tightest tolerance at ±2%, compared to the original MM5Z2V4 at ±8%. These parts are recommended for applications requiring enhanced voltage regulation accuracy. Both carry automotive qualification (AEC-Q100).

Q: Is automotive qualification required for my application?

A: Automotive qualification (AEC-Q100 or AEC-Q101) is required only for automotive applications. For general industrial or consumer applications, non-automotive parts such as BZX584C2V4_R1_00001 are suitable. Verify application requirements before part selection.

Q: What is the difference between MSL 1 rating on all parts?

A: MSL 1 (Moisture Sensitivity Level 1) indicates unlimited shelf life and no moisture baking requirement before soldering. All substitute parts listed carry MSL 1 rating, ensuring identical moisture handling requirements as the original MM5Z2V4.

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