MM5Z36V Equivalent & Substitute Parts

Part Overview

The MM5Z36V is a 36 V Zener diode rated at 200 mW in a surface mount SOD-523F package, manufactured by onsemi. This component is classified as obsolete, indicating that direct procurement from the original manufacturer is no longer available. Equivalent and substitute parts must be identified to maintain design continuity and ensure circuit functionality in applications requiring 36 V Zener regulation at the specified power level.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	36 V
Power - Max	200 mW
Tolerance	±6%
Impedance (Max)	90 Ohms
Current - Reverse Leakage @ Vr	50 nA @ 25.2 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 MM5Z36V is determined by the following critical parameters:

Primary Matching Criteria:

Voltage - Zener (Nom): 36 V (exact match required)
Mounting Type: Surface Mount
Current - Reverse Leakage @ Vr: 50 nA @ 25.2 V (standard specification)

Secondary Compatibility Factors:

Power - Max: 200 mW or greater (higher power ratings are acceptable for drop-in replacement)
Impedance (Max): 90 Ohms or lower (lower impedance is acceptable)
Operating Temperature Range: Must encompass or exceed -55°C ~ 150°C
Package / Case: SOD-523F, SOD-523, or SOD-323F (all compatible surface mount packages)
Tolerance: ±6% or tighter (tighter tolerance is acceptable)

Substitute parts are grouped into two categories:

Direct Equivalents (Active Status): Parts with identical or superior electrical specifications and active product status, suitable for immediate replacement without circuit redesign.

Compatible Alternatives (Active Status): Parts with enhanced specifications (higher power rating, improved tolerance, extended temperature range) that maintain functional compatibility while offering improved performance margins.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Power (Max)	Tolerance	Zzt (Max)	Package	Status	Temp Range
MM5Z36V	onsemi	36 V	200 mW	±6%	90 Ω	SOD-523F	Obsolete	-55°C ~ 150°C
MM5Z36VT1G	onsemi	36 V	500 mW	±5.6%	90 Ω	SOD-523	Active	-65°C ~ 150°C
BZT52H-C36,115	Nexperia USA Inc.	36 V	375 mW	±5%	60 Ω	SOD-123F	Active	-65°C ~ 150°C
BZX584C36_R1_00001	Panjit International Inc.	36 V	200 mW	±5%	90 Ω	SOD-523	Active	-55°C ~ 150°C
BZX585-B36,115	Nexperia USA Inc.	36 V	300 mW	±2%	90 Ω	SOD-523	Active	-65°C ~ 150°C
BZX585-C36,115	Nexperia USA Inc.	36 V	300 mW	±5%	90 Ω	SOD-523	Active	-65°C ~ 150°C
BZX84J-B36,115	Nexperia USA Inc.	36 V	550 mW	±2%	60 Ω	SOD-323F	Active	-65°C ~ 150°C
BZX84J-C36,115	Nexperia USA Inc.	36 V	550 mW	±5%	60 Ω	SOD-323F	Active	-65°C ~ 150°C
PZU36B,115	Nexperia USA Inc.	36 V	310 mW	±5%	60 Ω	SOD-323F	Active	-65°C ~ 150°C

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Recommended):

MM5Z36VT1G (onsemi) is the primary recommended substitute. This part maintains the same manufacturer lineage and package family (SOD-523), offers enhanced power rating (500 mW vs. 200 mW), improved tolerance (±5.6% vs. ±6%), and extended operating temperature range (-65°C vs. -55°C minimum). Active product status ensures long-term availability and supply chain stability.

BZX584C36_R1_00001 (Panjit International Inc.) provides an exact power rating match (200 mW) with identical impedance specification (90 Ω) and matching temperature range. This part is suitable for applications where power margin is not a design consideration. Active status and RoHS3 compliance support procurement continuity.

Tier 2 - Enhanced Performance Alternatives:

BZX585-B36,115 and BZX585-C36,115 (Nexperia USA Inc.) both offer 300 mW power rating with SOD-523 packaging, maintaining the same footprint as the original MM5Z36V. BZX585-B36,115 provides superior tolerance (±2%) and automotive qualification (AEC-Q100). Both parts support extended temperature operation (-65°C minimum).

BZT52H-C36,115 (Nexperia USA Inc.) delivers 375 mW in SOD-123F package with improved impedance (60 Ω vs. 90 Ω) and automotive qualification (AEC-Q101). Package change from SOD-523F to SOD-123F requires PCB layout verification.

Tier 3 - Higher Power Density Options:

BZX84J-B36,115 and BZX84J-C36,115 (Nexperia USA Inc.) provide 550 mW power rating in SOD-323F package with reduced impedance (60 Ω). Both parts carry automotive qualification (AEC-Q101). BZX84J-B36,115 offers superior tolerance (±2%). Package transition to SOD-323F requires PCB footprint modification.

PZU36B,115 (Nexperia USA Inc.) offers 310 mW in SOD-323F package with automotive qualification (AEC-Q100) and ±5% tolerance. Suitable for applications requiring moderate power increase with package footprint change.

Compliance and Certification:

All recommended substitute parts are RoHS3 compliant and REACH unaffected. Automotive-grade parts (BZX585 series, BZX84J series, PZU36B) carry AEC-Q100 or AEC-Q101 qualification, supporting use in automotive and high-reliability applications.

Frequently Asked Questions (FAQ)

Q: Can MM5Z36VT1G directly replace MM5Z36V without PCB modification?

A: Yes. MM5Z36VT1G maintains the same SOD-523 package family and surface mount configuration as the original MM5Z36V. No PCB layout changes are required. The enhanced 500 mW power rating provides additional thermal margin without affecting circuit operation.

Q: What is the difference between SOD-523F and SOD-523 packages?

A: Both designations refer to the same physical package form factor (SC-79). The "F" suffix in SOD-523F is a legacy designation. MM5Z36VT1G in SOD-523 package is mechanically and electrically compatible with MM5Z36V in SOD-523F package.

Q: Are BZX84J series parts (SOD-323F) compatible with MM5Z36V (SOD-523F) PCB layouts?

A: No. SOD-323F and SOD-523F are different package form factors with distinct footprints. BZX84J-B36,115 and BZX84J-C36,115 require PCB redesign and new footprint implementation. Verify pad spacing and lead dimensions before layout modification.

Q: What does the tolerance specification (±6%, ±5%, ±2%) mean for Zener diode selection?

A: Tolerance specifies the allowable deviation of the actual Zener voltage from the nominal 36 V specification. ±6% tolerance allows 33.84 V to 38.16 V operation. ±2% tolerance restricts operation to 35.28 V to 36.72 V. Tighter tolerance (lower percentage) is suitable for precision voltage regulation applications.

Q: Can I use a higher power-rated Zener diode (500 mW) in place of a 200 mW part?

A: Yes. Higher power rating indicates greater thermal capacity and does not degrade circuit performance. The diode will operate at the same voltage regulation point. Ensure circuit design does not rely on specific power dissipation characteristics of the original 200 mW part.

Q: What is the significance of impedance (Zzt) specification?

A: Impedance (Zzt) represents the dynamic resistance of the Zener diode in the reverse breakdown region. Lower impedance (60 Ω vs. 90 Ω) provides better voltage regulation stability and reduced output ripple. Parts with lower impedance are suitable for applications requiring tighter voltage regulation.

Q: Are automotive-qualified parts (AEC-Q100, AEC-Q101) required for non-automotive applications?

A: No. Automotive qualification indicates enhanced reliability testing and temperature cycling validation. Non-automotive applications may use non-qualified parts. However, automotive-qualified parts offer equivalent or superior performance and are suitable for any application.

Q: What is the operating temperature range significance?

A: Operating temperature range specifies the ambient conditions under which the diode maintains specified electrical characteristics. MM5Z36V operates -55°C to 150°C. Substitute parts with extended range (-65°C to 150°C) provide additional margin for extreme environment applications. Verify application requirements before selecting parts with different temperature ranges.

Q: Can BZT52H-C36,115 (SOD-123F) be used as a direct substitute without layout changes?

A: No. SOD-123F package has a different footprint than SOD-523F. PCB layout modification is required. However, the smaller SOD-123F package may be advantageous for space-constrained designs. Verify pad dimensions and lead spacing compatibility with your PCB design tools.

Q: What does "Active" product status mean compared to "Obsolete"?

A: Active status indicates the manufacturer continues production and supports long-term supply. Obsolete status indicates production has ended and inventory is limited. All recommended substitutes carry Active status, ensuring sustained availability and supply chain reliability.

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