MM5Z5V6 Equivalent & Substitute Parts

Part Overview

The MM5Z5V6 is a Zener diode manufactured by onsemi, rated at 5.6 V nominal with 200 mW maximum power dissipation in a surface mount SOD-523F package. This component is classified as obsolete, indicating discontinuation from the manufacturer. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for production, repair, and redesign applications.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	5.6 V
Power - Max	200 mW
Tolerance	±7%
Impedance (Max)	40 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 2 V
Operating Temperature Range	-55°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	SC-79, SOD-523F

Substitute Part Grouping Explanation

Substitution of the MM5Z5V6 is determined by the following critical parameters:

Primary Substitution Criteria:

Zener voltage: 5.6 V nominal (fixed requirement)
Power dissipation rating: minimum 200 mW (equal or greater)
Tolerance: ±7% or tighter (equal or better)
Impedance: 40 Ohms maximum (equal or lower)
Reverse leakage current: 1 µA @ 2 V (equal or lower)
Operating temperature range: -55°C to 150°C minimum (equal or wider)
Mounting type: Surface Mount (fixed requirement)

Secondary Considerations:

Package compatibility: SOD-523 and SOD-523F are mechanically compatible
Product status: Active status preferred for long-term availability
Compliance certifications: RoHS3 compliance and REACH status alignment

Substitute parts are grouped into two categories: direct equivalents (same power rating and tolerance) and functional alternatives (higher power ratings or improved tolerance that maintain circuit performance).

Parameter Comparison

Parameter	MM5Z5V6	MM5Z5V6T1G	BZT52C5V6T-TP	BZX584C5V6_R1_00001	BZX84J-C5V6,115
Manufacturer	onsemi	onsemi	Micro Commercial Co	Panjit International Inc.	Nexperia USA Inc.
Voltage - Zener (Nom)	5.6 V	5.6 V	5.6 V	5.6 V	5.6 V
Power - Max	200 mW	500 mW	100 mW	200 mW	550 mW
Tolerance	±7%	±7.1%	±7%	±5%	±5%
Impedance (Max)	40 Ohms	40 Ohms	40 Ohms	40 Ohms	40 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 2 V	1 µA @ 2 V	1 µA @ 2 V	1 µA @ 2 V	1 µA @ 2 V
Operating Temperature Range	-55°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SC-79, SOD-523F	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-90, SOD-323F
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent - Preferred for Pin-Compatible Replacement:

MM5Z5V6T1G (onsemi) is the primary substitute for MM5Z5V6. This part maintains identical zener voltage (5.6 V), impedance (40 Ohms), and reverse leakage specifications. The higher power rating (500 mW vs. 200 mW) provides design margin without affecting circuit operation. The part is manufactured by the same supplier (onsemi), carries Active product status, and is RoHS3 compliant. Operating temperature range extends to -65°C, providing wider environmental coverage. Packaging is SOD-523, which is mechanically compatible with SOD-523F. This part is recommended as the first choice for direct replacement.

Functional Equivalent - Same Power Rating:

BZX584C5V6_R1_00001 (Panjit International Inc.) matches the original 200 mW power rating and maintains all critical electrical parameters. This part offers improved tolerance (±5% vs. ±7%), enhancing voltage regulation precision. Product status is Active with RoHS3 compliance. Operating temperature range matches the original specification (-55°C ~ 150°C). Package is SOD-523, compatible with SOD-523F footprints. This part is suitable when tolerance improvement is beneficial to circuit performance.

Higher Power Alternative:

BZX84J-C5V6,115 (Nexperia USA Inc.) provides the highest power dissipation (550 mW) with improved tolerance (±5%). This part is qualified to AEC-Q101 automotive standards and carries Active product status. Operating temperature range extends to -65°C. Package is SOD-323F, which differs from the original SOD-523F and requires PCB layout modification. This part is applicable for designs requiring automotive-grade qualification or enhanced thermal performance.

Lower Power Alternative:

BZT52C5V6T-TP (Micro Commercial Co) is rated at 100 mW, below the original specification. This part maintains ±7% tolerance and all other electrical parameters. Product status is Active with RoHS3 compliance. Operating temperature range extends to -65°C. This part is suitable only for applications where the original 200 mW power requirement can be reduced or where circuit analysis confirms lower dissipation is acceptable.

Frequently Asked Questions (FAQ)

Q: Can MM5Z5V6T1G be used as a direct replacement for MM5Z5V6?

A: Yes. MM5Z5V6T1G is a direct pin-compatible substitute. Both parts share identical zener voltage (5.6 V), impedance (40 Ohms), and reverse leakage specifications. The higher power rating (500 mW) does not affect circuit operation and provides additional thermal margin. Packaging is SOD-523, which is mechanically compatible with SOD-523F footprints.

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

A: SOD-523F is a variant of SOD-523 with enhanced specifications. Both packages are mechanically compatible and can be used interchangeably on the same PCB footprint. The "F" designation indicates improved performance characteristics. Parts specified as SOD-523 are suitable replacements for SOD-523F applications.

Q: Why is BZX84J-C5V6,115 packaged in SOD-323F instead of SOD-523?

A: BZX84J-C5V6,115 uses the SOD-323F package, which is physically larger than SOD-523. This package change requires PCB layout modification and cannot be used as a direct drop-in replacement. Selection of this part is appropriate only when PCB redesign is feasible and automotive-grade qualification is required.

Q: Can BZT52C5V6T-TP (100 mW) replace MM5Z5V6 (200 mW)?

A: BZT52C5V6T-TP can replace MM5Z5V6 only if circuit analysis confirms that the application dissipates less than 100 mW in the zener diode. The lower power rating limits thermal performance. Use of this part without verification of actual power dissipation may result in component failure.

Q: What is the significance of the ±5% tolerance in BZX584C5V6_R1_00001 compared to ±7% in MM5Z5V6?

A: The ±5% tolerance provides tighter voltage regulation compared to the original ±7% specification. This improved tolerance reduces voltage variation across the component population and may enhance circuit performance in applications sensitive to zener voltage accuracy. The tighter tolerance does not introduce compatibility issues.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed (MM5Z5V6T1G, BZT52C5V6T-TP, BZX584C5V6_R1_00001, and BZX84J-C5V6,115) are RoHS3 compliant. The original MM5Z5V6 compliance status is not specified. RoHS3 compliance ensures conformance to current environmental and hazardous substance restrictions.

Q: What is the operating temperature range difference between MM5Z5V6 and its substitutes?

A: MM5Z5V6 operates from -55°C to 150°C. Most substitutes extend the lower temperature limit to -65°C, providing wider environmental coverage. BZX584C5V6_R1_00001 maintains the original -55°C lower limit. The upper temperature limit (150°C) is consistent across all parts. Extended temperature range does not affect compatibility in applications operating within the original specification.

Q: Is MM5Z5V6T1G the same as MM5Z5V6?

A: MM5Z5V6T1G is a variant of the MM5Z5V6 base product (MM5Z5). The "T1G" suffix indicates packaging and tape format specifications. Electrical specifications are equivalent, with MM5Z5V6T1G offering higher power rating (500 mW vs. 200 mW) and Active product status. The parts are functionally interchangeable.

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