MM5Z62VT1 Equivalent & Substitute Parts

Part Overview

The MM5Z62VT1 is a Zener diode manufactured by onsemi, rated at 62 V nominal with 100 mW maximum power dissipation in a SOD-523 surface mount package. This component is classified as obsolete, indicating discontinuation from the manufacturer. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs, repairs, and ongoing system support.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	62 V
Tolerance	±6%
Power - Max	100 mW
Impedance (Max)	215 Ohms
Current - Reverse Leakage @ Vr	50 nA @ 43.4 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA
Operating Temperature	-65°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	SOD-523
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the MM5Z62VT1 Zener diode is determined by the following critical parameters:

Primary Matching Criteria:

Voltage - Zener (Nom): 62 V (exact match required)
Operating Temperature Range: -65°C ~ 150°C (minimum requirement)
Current - Reverse Leakage @ Vr: 50 nA @ 43.4 V (exact match)
Mounting Type: Surface Mount

Secondary Compatibility Factors:

Power - Max: Equal to or greater than 100 mW
Impedance (Max): 215 Ohms or lower
Voltage - Forward (Vf): Compatible with circuit requirements
Tolerance: ±6% or tighter

Substitute parts are grouped by package type (SOD-523, SOD-123F, SOD-323F) and power rating. Parts with higher power ratings and improved tolerance specifications are direct functional upgrades. All substitute parts maintain the 62 V zener voltage and reverse leakage specifications required for circuit compatibility.

Parameter Comparison

Parameter	MM5Z62VT1	BZX585-C62,115	BZX585-B62,115	BZT52H-C62,115	BZX84J-C62,115
Manufacturer	onsemi	NXP Semiconductors	Nexperia USA Inc.	Nexperia USA Inc.	Nexperia USA Inc.
Voltage - Zener (Nom)	62 V	62 V	62 V	62 V	62 V
Tolerance	±6%	±5%	±2%	±5%	±5%
Power - Max	100 mW	300 mW	300 mW	375 mW	550 mW
Impedance (Max)	215 Ohms	215 Ohms	215 Ohms	140 Ohms	140 Ohms
Current - Reverse Leakage @ Vr	50 nA @ 43.4 V	50 nA @ 43.4 V	50 nA @ 43.4 V	50 nA @ 43.4 V	50 nA @ 43.4 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	1.1 V @ 100 mA	1.1 V @ 100 mA	900 mV @ 10 mA	1.1 V @ 100 mA
Operating Temperature	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Package / Case	SOD-523	SOD-523	SOD-523	SOD-123F	SOD-323F
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
AEC Qualification	None	None	AEC-Q100	AEC-Q101	AEC-Q101

Engineering Selection Recommendations

BZX585-C62,115 (NXP Semiconductors)

This part maintains the SOD-523 package footprint of the original MM5Z62VT1, enabling direct PCB layout compatibility. The 300 mW power rating provides a 3× margin over the original 100 mW specification. Tolerance is improved to ±5%. Product status is active with established supply chain availability. This is the primary recommendation for direct package replacement.

BZX585-B62,115 (Nexperia USA Inc.)

This part also uses the SOD-523 package and offers the tightest tolerance specification at ±2%, with 300 mW power rating. It carries AEC-Q100 automotive qualification and ROHS3 compliance, making it suitable for applications requiring automotive-grade components. Impedance and package dimensions match the original specification.

BZT52H-C62,115 (Nexperia USA Inc.)

This part provides the highest power rating at 375 mW with improved impedance of 140 Ohms. The SOD-123F package is larger than SOD-523, requiring PCB layout modification. AEC-Q101 automotive qualification and ROHS3 compliance are included. This option is suitable when increased power dissipation capability is required and package size constraints permit.

BZX84J-C62,115 (Nexperia USA Inc.)

This part offers the maximum power rating at 550 mW with the lowest impedance at 140 Ohms. The SOD-323F package requires PCB redesign. AEC-Q101 automotive qualification and ROHS3 compliance are provided. This option is appropriate for high-power applications where thermal performance is critical.

All substitute parts maintain the 62 V zener voltage, 50 nA reverse leakage current, and -65°C to 150°C operating temperature range of the original component. Selection should be based on available PCB space, power dissipation requirements, and compliance certifications needed for the application.

Frequently Asked Questions (FAQ)

Q: Can BZX585-C62,115 be used as a direct replacement for MM5Z62VT1?

A: Yes. Both parts use the SOD-523 package, maintain identical zener voltage (62 V) and reverse leakage current (50 nA @ 43.4 V), and operate across the same temperature range (-65°C ~ 150°C). The BZX585-C62,115 provides superior specifications with 300 mW power rating versus 100 mW, and ±5% tolerance versus ±6%. No PCB layout changes are required.

Q: What is the difference between SOD-523, SOD-123F, and SOD-323F packages?

A: These are three different surface mount package types with varying physical dimensions and power handling capabilities. SOD-523 is the smallest and matches the original MM5Z62VT1 package. SOD-123F and SOD-323F are progressively larger packages that accommodate higher power dissipation. Package selection affects PCB layout and thermal performance but does not alter electrical function when zener voltage and current specifications are maintained.

Q: Why do some substitute parts have different forward voltage specifications?

A: Forward voltage (Vf) varies based on the measurement current (If) used in the specification. The original MM5Z62VT1 specifies 900 mV @ 10 mA, while some substitutes specify 1.1 V @ 100 mA. These measurements occur at different operating points and do not indicate incompatibility. Both specifications are valid for the same component type and do not affect zener diode operation in voltage regulation circuits.

Q: Are all substitute parts RoHS compliant?

A: The original MM5Z62VT1 is RoHS non-compliant. BZX585-B62,115, BZT52H-C62,115, and BZX84J-C62,115 are ROHS3 compliant. BZX585-C62,115 compliance status is not specified in the provided data. For applications requiring RoHS compliance, select BZX585-B62,115, BZT52H-C62,115, or BZX84J-C62,115.

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

A: AEC-Q100 and AEC-Q101 are automotive industry reliability qualification standards. AEC-Q100 applies to discrete semiconductors, and AEC-Q101 applies to optoelectronic devices. Parts carrying these qualifications have undergone rigorous testing for automotive applications. BZX585-B62,115 carries AEC-Q100, while BZT52H-C62,115 and BZX84J-C62,115 carry AEC-Q101. These certifications are optional unless the application specifically requires automotive-grade components.

Q: Can I use a higher power-rated zener diode in place of the MM5Z62VT1?

A: Yes. A zener diode with equal or higher power rating, identical zener voltage, and compatible package type functions as a direct substitute. Higher power ratings provide additional thermal margin and do not degrade circuit performance. All listed substitute parts (300 mW, 375 mW, and 550 mW) are functionally compatible with the original 100 mW specification.

Q: What is impedance (Zzt) and why does it matter?

A: Impedance (Zzt) is the dynamic impedance of the zener diode in the reverse bias region. Lower impedance values indicate better voltage regulation performance and faster response to load changes. The original MM5Z62VT1 specifies 215 Ohms maximum. BZT52H-C62,115 and BZX84J-C62,115 offer improved impedance at 140 Ohms maximum, providing superior regulation characteristics. BZX585 series parts maintain the 215 Ohms specification.

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