MM5Z11VT1G Equivalent & Substitute Parts

Part Overview

The MM5Z11VT1G is a Zener diode manufactured by onsemi, rated at 11 V nominal with 500 mW power dissipation in a SOD-523 surface mount package. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. The 11 V Zener voltage with ±5.5% tolerance and SOD-523 packaging define the primary substitution criteria. Active alternatives are available from multiple manufacturers with comparable electrical characteristics and improved product status.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	11	V
Tolerance	±5.5%	%
Power - Max	500	mW
Impedance (Max)	20	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 8 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SOD-523	—

Substitute Part Grouping Explanation

Substitution of the MM5Z11VT1G is determined by the following critical parameters:

Primary Criteria (Must Match):

Voltage - Zener (Nom): 11 V
Mounting Type: Surface Mount
Operating Temperature Range: -65°C to 150°C

Secondary Criteria (Allowable Variation):

Tolerance: ±5.5% or tighter (±5%, ±2%)
Power - Max: 500 mW or greater
Impedance (Max): 20 Ohms or lower
Current - Reverse Leakage @ Vr: 100 nA @ 8 V or lower
Voltage - Forward (Vf) (Max) @ If: 900 mV @ 10 mA or lower

Package Considerations: Substitutes are grouped by package type. SOD-523 (SC-79) packages provide direct mechanical compatibility. SOD-323 (SC-76) and SOD-323F (SC-90) packages represent alternative surface mount options with different footprints and power ratings.

All substitute parts listed are active products with RoHS3 compliance and REACH unaffected status, providing improved supply chain availability compared to the obsolete MM5Z11VT1G.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Package	Product Status	RoHS Status
MM5Z11VT1G	onsemi	11 V	±5.5%	500 mW	20 Ω	SOD-523	Obsolete	—
MM3Z11VT1G	onsemi	11 V	±5%	300 mW	20 Ω	SOD-323	Active	ROHS3 Compliant
BZT52C11T-7	Diodes Incorporated	11 V	±5%	300 mW	20 Ω	SOD-523	Active	ROHS3 Compliant
BZT52C11T-TP	Micro Commercial Co	11 V	±5%	100 mW	20 Ω	SOD-523	Active	ROHS3 Compliant
BZT52H-C11,115	Nexperia USA Inc.	11 V	±5%	375 mW	10 Ω	SOD-123F	Active	ROHS3 Compliant
BZX585-B11,115	Nexperia USA Inc.	11 V	±2%	300 mW	10 Ω	SOD-523	Active	ROHS3 Compliant
BZX585-B11,135	Nexperia USA Inc.	11 V	±2%	300 mW	10 Ω	SOD-523	Active	ROHS3 Compliant
BZX585-C11,115	Nexperia USA Inc.	11 V	±5%	300 mW	10 Ω	SOD-523	Active	ROHS3 Compliant
BZX585-C11,135	Nexperia USA Inc.	11 V	±5%	300 mW	10 Ω	SOD-523	Active	ROHS3 Compliant
BZX84J-B11,115	Nexperia USA Inc.	11 V	±2%	550 mW	10 Ω	SOD-323F	Active	ROHS3 Compliant
BZX84J-C11,115	Nexperia USA Inc.	11 V	±5%	550 mW	10 Ω	SOD-323F	Active	ROHS3 Compliant

Engineering Selection Recommendations

Direct Package Compatibility (SOD-523):

For applications requiring identical PCB footprint and mechanical fit, the following active substitutes maintain SOD-523 packaging:

BZT52C11T-7 (Diodes Incorporated): Matches SOD-523 package with 300 mW power rating and ±5% tolerance. Suitable for designs where 300 mW power dissipation is adequate.
BZX585-B11,115 and BZX585-B11,135 (Nexperia USA Inc.): SOD-523 package with improved ±2% tolerance and 10 Ohm impedance. AEC-Q100 automotive qualification available. Recommended for applications requiring tighter voltage tolerance.
BZX585-C11,115 and BZX585-C11,135 (Nexperia USA Inc.): SOD-523 package with ±5% tolerance matching the original specification. AEC-Q100 automotive qualification. Available in both Cut Tape and Tape & Reel packaging options.

Alternative Package Options:

MM3Z11VT1G (onsemi): SOD-323 package with 300 mW rating. Suitable when PCB layout permits alternative footprint. Maintains onsemi product family continuity.
BZT52H-C11,115 (Nexperia USA Inc.): SOD-123F package with 375 mW power rating and ±5% tolerance. AEC-Q101 automotive qualification. Appropriate for designs with SOD-123F footprint availability.
BZX84J-B11,115 and BZX84J-C11,115 (Nexperia USA Inc.): SOD-323F package with 550 mW power rating, exceeding the original 500 mW specification. AEC-Q101 automotive qualification. Suitable for high-reliability applications.

Product Status Advantage:

All listed substitutes are active products with current manufacturing status, ensuring long-term supply availability and compliance with current RoHS3 regulations. The obsolete status of MM5Z11VT1G makes transition to active alternatives necessary for new production and design revisions.

Frequently Asked Questions (FAQ)

Q: Can BZT52C11T-TP replace MM5Z11VT1G directly?

A: BZT52C11T-TP shares the 11 V Zener voltage, ±5% tolerance, and SOD-523 package with MM5Z11VT1G. However, it is rated at 100 mW maximum power compared to the original 500 mW. This substitute is suitable only for applications where power dissipation does not exceed 100 mW. For designs requiring the full 500 mW capability, alternative substitutes with higher power ratings must be selected.

Q: What is the difference between BZX585-B11 and BZX585-C11 series?

A: Both series are manufactured by Nexperia USA Inc. in SOD-523 packages with 300 mW power rating and 10 Ohm impedance. The primary difference is tolerance: BZX585-B11 offers ±2% tolerance, while BZX585-C11 offers ±5% tolerance. The ±2% tolerance of BZX585-B11 provides tighter voltage regulation for precision applications. Both are AEC-Q100 qualified for automotive use.

Q: Is SOD-323 package compatible with SOD-523 PCB layouts?

A: No. SOD-323 (SC-76) and SOD-523 (SC-79) are distinct surface mount packages with different footprints and pin configurations. MM3Z11VT1G in SOD-323 package requires PCB layout modification and cannot be used as a direct mechanical substitute. Package selection must align with existing PCB design or require design revision.

Q: What does AEC-Q100 and AEC-Q101 qualification mean?

A: AEC-Q100 and AEC-Q101 are automotive electronics council qualifications indicating the component has passed automotive-grade reliability testing. AEC-Q100 applies to discrete semiconductors, while AEC-Q101 applies to optoelectronic devices. Components with these qualifications are suitable for automotive and high-reliability applications. MM5Z11VT1G lacks these qualifications; several active substitutes include them.

Q: Can I use BZX84J-C11,115 (550 mW) in place of MM5Z11VT1G (500 mW)?

A: Yes. BZX84J-C11,115 exceeds the power rating of MM5Z11VT1G and maintains the 11 V Zener voltage and ±5% tolerance. However, it uses SOD-323F package instead of SOD-523, requiring PCB layout modification. The higher power rating provides design margin and is electrically compatible with applications designed for 500 mW or lower dissipation.

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

A: Impedance (Zzt) affects voltage regulation quality under varying load conditions. Lower impedance provides better voltage stability. BZX585 and BZX84J series offer 10 Ohm impedance compared to 20 Ohm in MM5Z11VT1G and BZT52 series. For applications requiring superior voltage regulation, lower impedance substitutes are preferred.

Q: Are all listed substitutes RoHS3 compliant?

A: Yes. All active substitute parts listed are RoHS3 compliant and REACH unaffected. The original MM5Z11VT1G does not specify RoHS status. Transition to active substitutes ensures compliance with current environmental regulations for new production.

Q: What packaging options are available for 11 V Zener diodes?

A: The substitutes provided span three surface mount packages: SOD-523 (SC-79), SOD-323 (SC-76), SOD-323F (SC-90), and SOD-123F. Package selection depends on PCB layout constraints, power dissipation requirements, and available board space. SOD-523 and SOD-323F packages accommodate higher power ratings than SOD-323.

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