MM5Z11VT1 Equivalent & Substitute Parts

Part Overview

The MM5Z11VT1 is a Zener diode manufactured by onsemi, rated at 11 V nominal with 100 mW maximum power dissipation in a surface mount SOD-523 package. This part is classified as obsolete, indicating it is no longer in active production. Finding equivalent and substitute parts is necessary to support ongoing designs, ensure supply chain continuity, and maintain system reliability in applications requiring 11 V Zener regulation.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	11 V
Tolerance	±5%
Power - Max	100 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°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	SC-79, SOD-523
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MM5Z11VT1 is determined by the following critical parameters:

Electrical Compatibility:

Zener voltage must be 11 V nominal
Tolerance of ±5% or tighter (±2% acceptable)
Reverse leakage current at specified voltage
Forward voltage characteristics

Mechanical Compatibility:

Surface mount technology required
Package footprint compatibility (SOD-523 primary, SOD-323 and SOD-323F with layout verification)
Operating temperature range must encompass -65°C to 150°C

Power Dissipation:

Minimum 100 mW rating (higher ratings acceptable for derating applications)
Impedance specifications (20 Ohms or lower)

Regulatory & Compliance:

RoHS3 compliance preferred for new designs
AEC-Q100/Q101 automotive qualification where applicable

Substitute parts are grouped by package type and power rating, with direct replacements in SOD-523 packaging prioritized, followed by higher-power alternatives in alternative packages.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Package	Status	RoHS
MM5Z11VT1	onsemi	11 V	±5%	100 mW	20 Ohms	SOD-523	Obsolete	Non-compliant
MM3Z11VT1G	onsemi	11 V	±5%	300 mW	20 Ohms	SOD-323	Active	ROHS3
BZT52H-C11,115	Nexperia USA Inc.	11 V	±5%	375 mW	10 Ohms	SOD-123F	Active	ROHS3
BZT585B11T-7	Diodes Incorporated	11 V	±2%	350 mW	10 Ohms	SOD-523	Active	ROHS3
BZX585-B11,115	Nexperia USA Inc.	11 V	±2%	300 mW	10 Ohms	SOD-523	Active	ROHS3
BZX585-B11,135	Nexperia USA Inc.	11 V	±2%	300 mW	10 Ohms	SOD-523	Active	ROHS3
BZX585-C11,115	Nexperia USA Inc.	11 V	±5%	300 mW	10 Ohms	SOD-523	Active	ROHS3
BZX585-C11,135	Nexperia USA Inc.	11 V	±5%	300 mW	10 Ohms	SOD-523	Active	ROHS3
BZX84J-B11,115	Nexperia USA Inc.	11 V	±2%	550 mW	10 Ohms	SOD-323F	Active	ROHS3
BZX84J-C11,115	Nexperia USA Inc.	11 V	±5%	550 mW	10 Ohms	SOD-323F	Active	ROHS3
CZRU52C11	Comchip Technology	11 V	±5%	150 mW	20 Ohms	0603/SOD-523F	Active	ROHS3

Engineering Selection Recommendations

Direct Replacement (Same Package - SOD-523):

The BZT585B11T-7 (Diodes Incorporated) and BZX585 series (Nexperia USA Inc.) parts provide direct SOD-523 package compatibility. These parts are active products with ROHS3 compliance and higher power ratings (300–350 mW), enabling improved thermal performance and design margin. The BZT585B11T-7 offers ±2% tolerance with 350 mW rating. The BZX585-B11 and BZX585-C11 variants provide 300 mW with ±2% and ±5% tolerance options respectively, with automotive AEC-Q100 qualification available.

Higher Power Alternative (SOD-323 Package):

The MM3Z11VT1G (onsemi) provides a direct onsemi alternative with 300 mW power rating in SOD-323 packaging. This part maintains the same manufacturer lineage and offers ROHS3 compliance with active product status. Layout modification is required due to package change.

Highest Power Alternative (SOD-323F Package):

The BZX84J series (Nexperia USA Inc.) offers 550 mW power dissipation in SOD-323F packaging with automotive AEC-Q101 qualification. The BZX84J-B11,115 (±2% tolerance) and BZX84J-C11,115 (±5% tolerance) variants provide maximum thermal capability for applications requiring enhanced power handling.

Compact Alternative (0603/SOD-523F Package):

The CZRU52C11 (Comchip Technology) provides 150 mW in a 0603 footprint with ±5% tolerance. This part is suitable for space-constrained applications with moderate power requirements.

Compliance Consideration:

All recommended active substitutes are ROHS3 compliant, addressing the non-compliance status of the obsolete MM5Z11VT1. Automotive-grade parts with AEC-Q100/Q101 qualification are available for applications requiring automotive reliability standards.

Frequently Asked Questions (FAQ)

Q: Can the MM3Z11VT1G directly replace the MM5Z11VT1 without circuit modification?

A: The MM3Z11VT1G maintains electrical compatibility (11 V, ±5% tolerance) but uses SOD-323 packaging instead of SOD-523. PCB layout modification is required. The higher 300 mW power rating is backward compatible with 100 mW applications.

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

A: Both are 300 mW SOD-523 parts from Nexperia. The BZX585-B11 series has ±2% tolerance, while BZX585-C11 has ±5% tolerance. Selection depends on voltage regulation precision requirements. Both include automotive AEC-Q100 qualification.

Q: Is the BZT585B11T-7 suitable for the MM5Z11VT1 application?

A: Yes. The BZT585B11T-7 provides same-package (SOD-523) compatibility with 11 V nominal voltage, ±2% tolerance, and 350 mW power rating. The improved tolerance and power rating make it suitable for direct substitution with enhanced performance margin.

Q: Why do some substitutes have lower reverse leakage current specifications?

A: The BZX585 and BZT585 series specify 100 nA @ 8 V leakage, matching the MM5Z11VT1. The BZX585-C11,115 and BZX585-C11,135 variants specify 100 µA @ 8 V, which is higher. This difference should be evaluated for applications sensitive to leakage current.

Q: Can I use the BZX84J-C11,115 (550 mW) in place of the MM5Z11VT1 (100 mW)?

A: Yes, electrically and functionally. The BZX84J-C11,115 provides superior power handling and thermal performance. However, it requires SOD-323F package layout modification. This substitution is appropriate for designs requiring higher power dissipation capability or improved reliability margin.

Q: What is the operating temperature range difference between CZRU52C11 and other substitutes?

A: The CZRU52C11 operates from -55°C to 125°C, which is narrower than the MM5Z11VT1 range of -65°C to 150°C. This part is suitable only for applications within the -55°C to 125°C window.

Q: Are all recommended substitutes RoHS compliant?

A: Yes. All active substitute parts listed are ROHS3 compliant, addressing the non-compliance status of the obsolete MM5Z11VT1. This compliance is mandatory for new designs and many procurement standards.

Q: Which substitute offers the best combination of availability and compliance?

A: The BZX585-C11,115 and BZX585-C11,135 (Nexperia) provide SOD-523 package compatibility, ±5% tolerance matching the original part, 300 mW power rating, ROHS3 compliance, and automotive AEC-Q100 qualification with substantial inventory availability.

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