MM5Z16VT1 Equivalent & Substitute Parts

Part Overview

The MM5Z16VT1 is a Zener diode rated at 16 V nominal with 100 mW maximum power dissipation in a surface mount SOD-523 package, manufactured by onsemi. This component is classified as obsolete, indicating that direct procurement from the original manufacturer is no longer available. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or repair requirements for applications utilizing this component.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	16	V
Tolerance	±6%	—
Power - Max	100	mW
Impedance (Max)	40	Ohms
Current - Reverse Leakage @ Vr	50 nA @ 11.2 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	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the MM5Z16VT1 is determined by the following critical parameters:

Electrical Parameters (Must Match or Exceed):

Zener voltage: 16 V nominal
Maximum power dissipation: 100 mW or greater
Impedance: 40 Ohms or lower
Reverse leakage current: 50 nA @ 11.2 V or lower
Forward voltage: 900 mV @ 10 mA or lower
Operating temperature range: -65°C to 150°C minimum

Mechanical Parameters (Must Be Compatible):

Mounting type: Surface Mount
Package compatibility: SOD-523 or equivalent footprint

Substitute parts are grouped into three categories:

Direct Manufacturer Upgrade: Same manufacturer (onsemi) with identical electrical specifications but higher power rating and active product status.
Similar Manufacturer Parts: Alternative manufacturers (Nexperia, Comchip, Rohm) with matching 16 V zener voltage and compatible packages, with variations in power rating, impedance, and certifications.
Parametric Equivalents: Parts with identical electrical specifications from alternative manufacturers, maintaining the 100 mW power rating and SOD-523 package.

Parameter Comparison

Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Package	Product Status	RoHS Status
MM5Z16VT1	onsemi	16 V	±6%	100 mW	40 Ω	SOD-523	Obsolete	Non-compliant
MM5Z16VT1G	onsemi	16 V	±5.6%	500 mW	40 Ω	SOD-523	Active	ROHS3 Compliant
BZT52H-C16,115	Nexperia USA Inc.	16 V	±5%	375 mW	20 Ω	SOD-123F	Active	ROHS3 Compliant
BZX84J-C16,115	Nexperia USA Inc.	16 V	±5%	550 mW	20 Ω	SOD-323F	Active	ROHS3 Compliant
CZRU52C16	Comchip Technology	16 V	±5%	150 mW	40 Ω	0603/SOD-523F	Active	ROHS3 Compliant
EDZVFHT2R16B	Rohm Semiconductor	16 V	±2.06%	150 mW	50 Ω	EMD2	Active	ROHS3 Compliant
BZT52C16T-TP	Micro Commercial Co	16 V	±5%	100 mW	40 Ω	SOD-523	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: MM5Z16VT1G

The MM5Z16VT1G is the direct manufacturer upgrade from onsemi. It maintains identical electrical specifications to the MM5Z16VT1 while offering superior power dissipation (500 mW versus 100 mW), improved tolerance (±5.6% versus ±6%), and active product status. This part is ROHS3 compliant and available in high volume. The SOD-523 package footprint is identical, requiring no PCB redesign.

Secondary Recommendation: BZT52C16T-TP

The BZT52C16T-TP from Micro Commercial Co provides parametric equivalence with identical electrical specifications (16 V, 100 mW, 40 Ω impedance, SOD-523 package). This part is active, ROHS3 compliant, and suitable for direct substitution without circuit modification. Tolerance is improved to ±5%.

Alternative Recommendations for Higher Power Applications:

If circuit design permits increased power dissipation, the BZX84J-C16,115 (550 mW, SOD-323F) or BZT52H-C16,115 (375 mW, SOD-123F) from Nexperia provide enhanced thermal performance with lower impedance (20 Ω). Both are AEC-Q101 qualified for automotive applications and ROHS3 compliant. Package changes require PCB layout modification.

Consideration for Precision Applications:

The EDZVFHT2R16B from Rohm Semiconductor offers superior tolerance (±2.06%) and AEC-Q101 automotive qualification. Power rating (150 mW) exceeds the original specification. The EMD2 package requires footprint verification.

Compliance Note:

All recommended substitutes are ROHS3 compliant, addressing the non-compliance status of the obsolete MM5Z16VT1. Selection should prioritize active product status and compliance requirements for new designs or long-term production support.

Frequently Asked Questions (FAQ)

Q: Can MM5Z16VT1G be used as a direct replacement for MM5Z16VT1?

A: Yes. The MM5Z16VT1G is a direct manufacturer upgrade with identical zener voltage (16 V), impedance (40 Ω), forward voltage characteristics, and SOD-523 package footprint. The higher power rating (500 mW versus 100 mW) and improved tolerance (±5.6% versus ±6%) provide enhanced performance without circuit modification.

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

A: SOD-523 and SOD-123F are different surface mount package outlines with different footprints. SOD-523 is smaller and more compact. Substitution between these packages requires PCB layout modification. The MM5Z16VT1 uses SOD-523; the BZT52H-C16,115 uses SOD-123F.

Q: Is BZT52C16T-TP a true equivalent to MM5Z16VT1?

A: Yes. The BZT52C16T-TP matches all critical electrical parameters: 16 V zener voltage, 100 mW power rating, 40 Ω impedance, and SOD-523 package. It is active, ROHS3 compliant, and requires no circuit or PCB modifications.

Q: Why do some substitutes have lower impedance values?

A: Impedance (Zzt) represents the dynamic resistance of the zener diode. Lower impedance values (20 Ω versus 40 Ω) indicate better voltage regulation and lower output impedance. Parts with lower impedance provide improved performance in voltage regulation applications but are not required for basic substitution compatibility.

Q: Can I use a higher power-rated zener diode as a substitute?

A: Yes, provided all other electrical parameters are compatible. Higher power ratings (such as 500 mW in MM5Z16VT1G versus 100 mW in MM5Z16VT1) provide thermal margin and are electrically compatible. Circuit operation remains unchanged; the component simply dissipates heat more efficiently.

Q: What does ROHS3 compliance mean?

A: ROHS3 compliance indicates the part meets the Restriction of Hazardous Substances Directive, restricting lead, cadmium, mercury, and other hazardous materials. The original MM5Z16VT1 is non-compliant; all recommended substitutes are ROHS3 compliant, meeting modern environmental and regulatory standards.

Q: Are AEC-Q101 qualified parts required for my application?

A: AEC-Q101 qualification is required for automotive applications. The BZT52H-C16,115, BZX84J-C16,115, and EDZVFHT2R16B carry this qualification. For non-automotive applications, AEC-Q101 qualification is not necessary but provides additional quality assurance.

Q: What is the significance of tolerance differences (±6% versus ±5%)?

A: Tolerance specifies the allowable deviation from the nominal 16 V zener voltage. Tighter tolerance (±5%) provides more precise voltage regulation. For most applications, both tolerances are acceptable. Precision voltage reference applications may require the tighter ±5% or ±2.06% tolerance offered by alternative parts.

Q: Can I substitute parts with different operating temperature ranges?

A: The MM5Z16VT1 operates from -65°C to 150°C. The CZRU52C16 operates from -55°C to 125°C, a narrower range. Substitution is acceptable if the application does not require the full -65°C to -55°C temperature range. For applications requiring the full -65°C to 150°C range, use substitutes with matching or wider temperature specifications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message