MM5Z16V Equivalent & Substitute Parts

Part Overview

The MM5Z16V is a Zener diode manufactured by onsemi, rated at 16 V nominal with 200 mW maximum power dissipation in a surface mount SOD-523F package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -55°C to 150°C with ±6% voltage tolerance and is suitable for voltage regulation and protection applications in electronic circuits.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	16	V
Power - Max	200	mW
Tolerance	±6%	-
Impedance (Max)	40	Ohms
Current - Reverse Leakage @ Vr	50	nA @ 11.2 V
Operating Temperature	-55 to 150	°C
Mounting Type	Surface Mount	-
Package / Case	SC-79, SOD-523F	-

Substitute Part Grouping Explanation

Substitution of the MM5Z16V is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 16 V nominal
Package compatibility: SOD-523 or SOD-523F surface mount packages
Impedance: 40 Ohms maximum
Reverse leakage current: 50 nA @ 11.2 V
Operating temperature range: minimum -55°C to 150°C

Secondary Considerations:

Power rating: Substitute parts may exceed 200 mW (higher power ratings are acceptable for drop-in replacement)
Voltage tolerance: Substitute parts with tighter tolerance (±2% to ±5%) are acceptable
Product status: Active status preferred for long-term availability

The substitute parts listed below meet the primary matching criteria and maintain functional equivalence within the specified electrical and mechanical parameters.

Parameter Comparison

Parameter	MM5Z16V	MM5Z16VT1G	BZX584C16_R1_00001	BZX585-B16,115	BZX585-C16,115	BZX84J-B16,115
Manufacturer	onsemi	onsemi	Panjit International Inc.	Nexperia USA Inc.	NXP USA Inc.	NXP Semiconductors
Voltage - Zener (Nom)	16 V	16 V	16 V	16 V	16 V	16 V
Power - Max	200 mW	500 mW	200 mW	300 mW	300 mW	550 mW
Tolerance	±6%	±5.6%	±5%	±2%	±5%	±2%
Impedance (Max)	40 Ohms	40 Ohms	40 Ohms	40 Ohms	40 Ohms	20 Ohms
Current - Reverse Leakage @ Vr	50 nA @ 11.2 V	50 nA @ 11.2 V	100 nA @ 11.2 V	50 nA @ 11.2 V	50 nA @ 11.2 V	50 nA @ 11.2 V
Operating Temperature	-55 to 150°C	-65 to 150°C	-55 to 150°C	-65 to 150°C	-65 to 150°C	150°C (TJ)
Package / Case	SC-79, SOD-523F	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-90, SOD-323F
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	-	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	-

Engineering Selection Recommendations

Recommended Primary Substitute: MM5Z16VT1G

The MM5Z16VT1G is the direct successor from onsemi with active product status. It maintains the same 16 V zener voltage and 40 Ohm impedance specification. The higher power rating of 500 mW provides enhanced thermal margin compared to the original 200 mW specification. Operating temperature range extends to -65°C, providing broader environmental coverage. ROHS3 compliance ensures regulatory alignment for current manufacturing standards.

Alternative Substitutes for Specific Applications:

BZX585-B16,115 (Nexperia USA Inc.) is suitable for automotive applications, carrying AEC-Q101 qualification. The 300 mW power rating and ±2% tolerance provide improved voltage regulation precision. Operating temperature extends to -65°C.

BZX585-C16,115 (NXP USA Inc.) offers 300 mW power rating with ±5% tolerance and active product status. This part provides a mid-range power option between the original 200 mW and higher-rated alternatives.

BZX84J-B16,115 (NXP Semiconductors) is available for applications requiring higher power dissipation at 550 mW. This part uses SOD-323F packaging, which differs from the original SOD-523F. The ±2% tolerance and AEC-Q101 automotive qualification support demanding applications. Lower impedance of 20 Ohms improves regulation characteristics.

BZX584C16_R1_00001 (Panjit International Inc.) maintains the original 200 mW power specification with ±5% tolerance and active product status. This part is suitable for direct replacement in space-constrained applications where power margin is not a concern.

Frequently Asked Questions (FAQ)

Q: Can MM5Z16VT1G directly replace MM5Z16V without circuit modification?

A: Yes. Both parts maintain 16 V nominal zener voltage, 40 Ohm impedance, and identical reverse leakage characteristics. The higher power rating of MM5Z16VT1G (500 mW vs. 200 mW) is a non-limiting improvement. Package compatibility exists between SOD-523 and SOD-523F variants for surface mount applications.

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

A: Both are surface mount packages in the SC-79 case style with identical electrical performance. SOD-523F denotes a specific variant designation. Mechanical footprints are compatible for PCB assembly purposes.

Q: Why do some substitute parts have lower impedance values?

A: Impedance variation reflects different semiconductor designs and manufacturing processes. Lower impedance (such as 20 Ohms in BZX84J-B16,115) indicates improved voltage regulation characteristics and faster transient response. This is a beneficial parameter for voltage reference applications.

Q: Is BZX84J-B16,115 compatible with the original PCB layout?

A: BZX84J-B16,115 uses SOD-323F packaging (SC-90 case), which differs from the original SOD-523F (SC-79 case). PCB footprint modification is required. Electrical performance is compatible; mechanical redesign is necessary.

Q: Which substitute part is recommended for automotive applications?

A: BZX585-B16,115 and BZX84J-B16,115 both carry AEC-Q101 automotive qualification. BZX585-B16,115 maintains the original package family (SOD-523) and is the preferred choice for automotive designs requiring minimal layout changes.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed carry ROHS3 compliance certification. The original MM5Z16V does not specify RoHS status due to its obsolete classification.

Q: What is the impact of voltage tolerance differences on circuit design?

A: Substitute parts with tighter tolerance (±2%) provide more precise voltage regulation compared to the original ±6% specification. Circuit designs based on the original ±6% tolerance will function correctly with tighter-tolerance substitutes. Designs requiring specific tolerance bands should verify compatibility with the selected substitute part's tolerance specification.

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