Equivalent & Substitute Parts for MM5Z36VT1

Part Overview

The MM5Z36VT1 is a Zener diode rated at 36 V nominal with 100 mW maximum power dissipation in a surface mount SOD-523 package. This part is classified as obsolete, which necessitates identification of equivalent and substitute components for ongoing design support and procurement. The MM5Z36VT1 operates across a temperature range of -65°C to 150°C and is RoHS non-compliant. Equivalent parts with improved availability and compliance status are available from multiple manufacturers.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	36	V
Power - Maximum	100	mW
Tolerance	±6%	—
Impedance (Maximum)	90	Ohms
Current - Reverse Leakage @ Vr	50	nA @ 25.2 V
Voltage - Forward (Maximum) @ If	900	mV @ 10 mA
Operating Temperature Range	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SOD-523	—

Substitute Part Grouping Explanation

Substitution of the MM5Z36VT1 is determined by the following critical parameters: nominal Zener voltage (36 V), maximum power rating, package type (SOD-523), operating temperature range (-65°C to 150°C), and reverse leakage current specification (50 nA @ 25.2 V). Parts are grouped into two categories:

Direct Substitutes (Same Package - SOD-523): Parts maintaining the SOD-523 package footprint with 36 V nominal voltage and compatible power ratings. These include MM5Z36VT1G, BZT585B36T-7, BZX585-B36,115, and BZX585-C36,115. These parts support direct board-level replacement without layout modification.

Functional Equivalents (Alternative Packages): Parts with 36 V nominal voltage but different package types (SOD-323, SOD-323F, 0603) that provide equivalent electrical performance. These include BZX84J-B36,115, BZX84J-C36,115, BZT52H-C36,115, and CZRU52C36. These require PCB layout adjustment but maintain electrical compatibility.

Similar Voltage Alternatives: Parts with nominal voltages near 36 V (39 V) in alternative packages, such as MM3Z39VT1G, which may be suitable for applications with relaxed voltage tolerance requirements.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Power (Max)	Tolerance	Package	Impedance (Max)	Product Status	RoHS Status
MM5Z36VT1	onsemi	36 V	100 mW	±6%	SOD-523	90 Ω	Obsolete	Non-compliant
MM5Z36VT1G	onsemi	36 V	500 mW	±5.6%	SOD-523	90 Ω	Active	ROHS3 Compliant
BZT585B36T-7	Diodes Incorporated	36 V	350 mW	±2%	SOD-523	90 Ω	Active	ROHS3 Compliant
BZX585-B36,115	Nexperia USA Inc.	36 V	300 mW	±2%	SOD-523	90 Ω	Active	ROHS3 Compliant
BZX585-C36,115	Nexperia USA Inc.	36 V	300 mW	±5%	SOD-523	90 Ω	Active	ROHS3 Compliant
BZX84J-B36,115	Nexperia USA Inc.	36 V	550 mW	±2%	SOD-323F	60 Ω	Active	ROHS3 Compliant
BZX84J-C36,115	Nexperia USA Inc.	36 V	550 mW	±5%	SOD-323F	60 Ω	Active	ROHS3 Compliant
BZT52H-C36,115	Nexperia USA Inc.	36 V	375 mW	±5%	SOD-123F	60 Ω	Active	ROHS3 Compliant
CZRU52C36	Comchip Technology	36 V	150 mW	±5%	0603/SOD-523F	90 Ω	Active	ROHS3 Compliant
EDZVFHT2R36B	Rohm Semiconductor	36 V	150 mW	±2.5%	EMD2	300 Ω	Active	ROHS3 Compliant
MM3Z39VT1G	onsemi	39 V	300 mW	±5%	SOD-323	130 Ω	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation - Direct Replacement: MM5Z36VT1G (onsemi) is the preferred direct substitute. It maintains identical package geometry (SOD-523), matching nominal voltage (36 V), and identical impedance specification (90 Ω). The part is active with ROHS3 compliance and offers superior power rating (500 mW vs. 100 mW), providing design margin for thermal management. Tolerance improves to ±5.6% from ±6%.

Secondary Recommendation - SOD-523 Package Alternatives: BZT585B36T-7 (Diodes Incorporated) and BZX585-B36,115 (Nexperia) both maintain SOD-523 package compatibility with 36 V nominal voltage. BZT585B36T-7 offers tighter tolerance (±2%) and 350 mW power rating. BZX585-B36,115 provides automotive-grade qualification (AEC-Q100) with 300 mW power rating and ±2% tolerance.

Alternative Package Options: BZX84J-B36,115 (Nexperia) in SOD-323F package provides 550 mW power rating with automotive qualification (AEC-Q101) and ±2% tolerance. This option requires PCB layout modification but offers superior thermal performance. BZT52H-C36,115 (Nexperia) in SOD-123F package provides automotive qualification (AEC-Q101) with 375 mW power rating.

Compliance Consideration: All recommended substitutes are ROHS3 compliant and REACH unaffected, addressing the non-compliance status of the obsolete MM5Z36VT1.

Frequently Asked Questions (FAQ)

Q: Can MM5Z36VT1G directly replace MM5Z36VT1 without PCB modification?

A: Yes. MM5Z36VT1G maintains identical SOD-523 package geometry, footprint, and pinout. No PCB layout changes are required for direct board-level substitution.

Q: What is the significance of the power rating difference between MM5Z36VT1 (100 mW) and MM5Z36VT1G (500 mW)?

A: The higher power rating in MM5Z36VT1G provides increased thermal margin and allows operation at higher current levels without exceeding junction temperature limits. This is a beneficial characteristic for reliability and does not create incompatibility with the original design.

Q: Are the tolerance differences between substitute parts significant?

A: Tolerance differences (±2%, ±2.5%, ±5%, ±5.6%, ±6%) affect voltage regulation accuracy. Tighter tolerance parts (±2%) provide more precise voltage regulation. Selection depends on application requirements. The original ±6% tolerance is the least stringent; all substitutes meet or exceed this specification.

Q: Can BZX84J-B36,115 (SOD-323F package) be used if the PCB layout is modified?

A: Yes. BZX84J-B36,115 provides equivalent electrical performance with 36 V nominal voltage, 50 nA reverse leakage, and automotive qualification (AEC-Q101). The SOD-323F package is physically larger than SOD-523, requiring PCB footprint adjustment. Electrical compatibility is maintained.

Q: What is the difference between BZX585-B36,115 and BZX585-C36,115?

A: Both parts maintain SOD-523 package compatibility and 36 V nominal voltage. The primary difference is tolerance: BZX585-B36,115 specifies ±2% tolerance, while BZX585-C36,115 specifies ±5% tolerance. Both include automotive qualification (AEC-Q100). Selection depends on voltage regulation precision requirements.

Q: Is MM3Z39VT1G (39 V) suitable as a substitute for MM5Z36VT1 (36 V)?

A: MM3Z39VT1G operates at 39 V nominal voltage, representing an 8.3% increase from the 36 V specification. This part is classified as a similar voltage alternative rather than a direct substitute. Compatibility depends on application voltage tolerance. Use only if the circuit design accommodates 39 V operation.

Q: Do all substitute parts maintain the -65°C to 150°C operating temperature range?

A: Most substitutes maintain this range. CZRU52C36 (Comchip Technology) operates across -55°C to 125°C, which is a narrower range. Verify temperature range compatibility with application requirements before selection.

Q: What is the advantage of automotive-qualified parts like BZX585-B36,115 and BZX84J-B36,115?

A: Automotive-qualified parts (AEC-Q100, AEC-Q101) undergo enhanced reliability testing and qualification procedures. These certifications are required for automotive applications and provide assurance of quality and reliability for demanding environments. Use in non-automotive applications is acceptable.

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