MM5Z3V6 Zener Diode Equivalent & Substitute Parts

Part Overview

The MM5Z3V6 is a 3.6 V Zener diode manufactured by onsemi in SOD-523F surface mount package with 200 mW power rating and ±6% tolerance. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The MM5Z3V6 serves voltage regulation and protection functions in electronic circuits requiring precise 3.6 V reference voltage with minimal power dissipation in compact form factors.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	3.6	V
Tolerance	±6%	-
Power - Maximum	200	mW
Impedance (Maximum)	90	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 1 V
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	-
Package / Case	SC-79, SOD-523F	-
Product Status	Obsolete	-

Substitute Part Grouping Explanation

Substitution of the MM5Z3V6 is determined by the following critical parameters:

Primary Substitution Criteria:

Zener voltage: 3.6 V (nominal)
Mounting type: Surface Mount
Package compatibility: SOD-523F or equivalent footprint (SC-79)
Reverse leakage current: 5 µA @ 1 V
Impedance: 90 Ohms maximum

Secondary Considerations:

Power rating: Minimum 200 mW (higher ratings acceptable for drop-in replacement)
Tolerance: ±6% or better (tighter tolerances acceptable)
Operating temperature: -55°C to 150°C minimum range
Compliance: RoHS3 and REACH requirements

Substitute parts are grouped into three categories:

Direct Equivalents (Same Package SOD-523F): Parts maintaining identical or superior electrical characteristics within SOD-523F package footprint.

Compatible Alternatives (SOD-523 Package): Parts with same zener voltage and electrical performance in standard SOD-523 package, compatible with SOD-523F footprints.

Package Variants (SOD-323F/SOD-123F): Parts with identical electrical specifications but different surface mount packages, requiring PCB layout modification.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Package	Status	Inventory
MM5Z3V6	onsemi	3.6	±6%	200	90	SOD-523F	Obsolete	3056
MM5Z3V6T1G	onsemi	3.6	±5.6%	500	90	SOD-523	Active	65400
BZT52C3V6T-TP	Micro Commercial Co	3.6	±5%	100	90	SOD-523	Active	8676
BZT52H-C3V6,115	Nexperia USA Inc.	3.6	±5%	375	95	SOD-123F	Active	11451
BZX584C3V6_R1_00001	Panjit International Inc.	3.6	±5%	200	90	SOD-523	Active	5400
BZX585-B3V6,115	NXP Semiconductors	3.6	±2%	300	90	SOD-523	Active	163501
BZX585-B3V6,135	Nexperia USA Inc.	3.6	±2%	300	90	SOD-523	Active	815
BZX84J-B3V6,115	Nexperia USA Inc.	3.6	±2%	550	90	SOD-323F	Active	8880
BZX84J-C3V6,115	Nexperia USA Inc.	3.6	±5%	550	90	SOD-323F	Active	18500
PZU3.6B,115	Nexperia USA Inc.	3.6	±5%	310	90	SOD-323F	Active	4100

Engineering Selection Recommendations

Tier 1 - Direct Replacement (No PCB Modification Required):

MM5Z3V6T1G (onsemi) is the primary recommended substitute. This part maintains the same manufacturer lineage, identical zener voltage of 3.6 V, and compatible SOD-523 package footprint. The 500 mW power rating exceeds the original 200 mW specification, providing additional thermal margin. Tolerance improves to ±5.6%. Product status is Active with 65,400 units in stock, ensuring long-term availability. RoHS3 compliance confirmed.

BZX584C3V6_R1_00001 (Panjit International Inc.) provides equivalent performance with identical 200 mW power rating and SOD-523 package. Tolerance is ±5%, and operating temperature range matches the original specification. Product status is Active with 5,400 units available. RoHS3 compliant.

BZX585-B3V6,115 (NXP Semiconductors) offers superior tolerance at ±2% with 300 mW power rating in SOD-523 package. Highest inventory availability at 163,501 units. Active product status ensures continued supply. RoHS3 compliant.

Tier 2 - Package Variant Substitutes (PCB Layout Modification Required):

BZX84J-C3V6,115 (Nexperia USA Inc.) provides 550 mW power rating with ±5% tolerance in SOD-323F package. Automotive grade with AEC-Q101 qualification. Requires PCB footprint change from SOD-523F to SOD-323F. 18,500 units in stock. RoHS3 compliant.

PZU3.6B,115 (Nexperia USA Inc.) delivers 310 mW power rating with ±5% tolerance in SOD-323F package. Automotive grade with AEC-Q100 qualification. Requires PCB layout modification. 4,100 units available. RoHS3 compliant.

Not Recommended:

BZT52C3V6T-TP (Micro Commercial Co) has reduced 100 mW power rating, below the original 200 mW specification. Suitable only for applications with lower power dissipation requirements.

Frequently Asked Questions (FAQ)

Q1: Can MM5Z3V6T1G directly replace MM5Z3V6 without PCB changes?

A: Yes. MM5Z3V6T1G maintains identical zener voltage (3.6 V), impedance (90 Ohms), and reverse leakage current (5 µA @ 1 V). Both use SOD-523 package with compatible SC-79 footprint. The 500 mW power rating of MM5Z3V6T1G exceeds the original 200 mW, providing thermal margin. No PCB modification required.

Q2: What is the difference between SOD-523F and SOD-523 packages?

A: SOD-523F and SOD-523 are mechanically compatible surface mount packages with identical footprints and pin configurations. The "F" designation indicates a specific variant, but both are interchangeable on standard PCB layouts designed for SOD-523 footprints.

Q3: Why do some substitutes have better tolerance (±2%) than the original (±6%)?

A: Tighter tolerance specifications represent improved manufacturing precision and are fully compatible with applications designed for the original ±6% tolerance. Parts with ±2% tolerance will operate within the original design specifications while providing enhanced voltage accuracy.

Q4: Can I use BZX84J-C3V6,115 (SOD-323F) as a substitute?

A: BZX84J-C3V6,115 is electrically equivalent with identical 3.6 V zener voltage and 90 Ohms impedance. However, SOD-323F package requires PCB layout modification compared to the original SOD-523F package. Use only if PCB redesign is feasible.

Q5: What does "Automotive Grade" and "AEC-Q101" qualification mean?

A: Automotive Grade indicates the part meets automotive industry reliability standards. AEC-Q101 is the Automotive Electronics Council qualification for discrete semiconductors, confirming the part meets stringent automotive temperature cycling, humidity, and reliability requirements. These parts are suitable for automotive applications but are also compatible with industrial and consumer applications.

Q6: Why is BZX585-B3V6,115 recommended despite higher inventory cost?

A: BZX585-B3V6,115 offers ±2% tolerance (superior to original ±6%), 300 mW power rating (exceeds 200 mW), and 163,501 units in stock (highest availability). The combination of improved specifications and guaranteed long-term supply justifies selection for new designs and high-volume production.

Q7: Is the operating temperature range critical for substitution?

A: The original MM5Z3V6 specifies -55°C to 150°C. All recommended Tier 1 substitutes maintain this range or extend it to -65°C to 150°C, which is fully compatible. Operating temperature range is a critical parameter; substitutes must meet or exceed the original specification.

Q8: What does "RoHS3 Compliant" mean for component selection?

A: RoHS3 (Restriction of Hazardous Substances Directive 3) compliance confirms the part contains no lead, mercury, cadmium, or other restricted substances. All recommended substitutes are RoHS3 compliant, meeting environmental and regulatory requirements for EU and global markets.

Q9: Can I use BZT52C3V6T-TP with its 100 mW rating?

A: BZT52C3V6T-TP is electrically compatible but has reduced power dissipation capability (100 mW vs. 200 mW original). Use only if circuit analysis confirms power dissipation will not exceed 100 mW. For applications requiring full 200 mW capability, select alternatives with 200 mW or higher ratings.

Q10: What is the significance of "Impedance (Zzt) 90 Ohms"?

A: Impedance (Zzt) is the dynamic impedance of the zener diode at specified test current. The 90 Ohms specification determines voltage regulation quality and transient response. All recommended substitutes maintain 90 Ohms impedance (or 95 Ohms maximum), ensuring equivalent voltage regulation performance.

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