MMSZ2V7T3G Equivalent & Substitute Parts

Part Overview

The MMSZ2V7T3G is a Zener diode manufactured by onsemi, rated at 2.7 V nominal with 500 mW power dissipation in a surface mount SOD-123 package. This component is classified as obsolete, indicating that direct procurement from original inventory may be limited. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	2.7 V
Tolerance	±5%
Power - Max	500 mW
Impedance (Max)	100 Ohms
Current - Reverse Leakage @ Vr	20 µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA
Operating Temperature	-55°C ~ 150°C
Package / Case	SOD-123
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the MMSZ2V7T3G is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): 2.7 V
Tolerance: ±5%
Power - Max: 500 mW
Package / Case: SOD-123
Mounting Type: Surface Mount

Secondary Compatibility Parameters:

Operating Temperature Range: -55°C ~ 150°C
Voltage - Forward (Vf) (Max) @ If: 900 mV @ 10 mA

Substitute parts are grouped into three categories:

Direct Manufacturer Substitutes (onsemi): Parts with identical electrical specifications and active product status, differing only in packaging format (Tape & Reel vs. Cut Tape) or impedance characteristics within acceptable tolerance.

Parametric Equivalents (onsemi): Parts with matching core electrical parameters and identical impedance specifications, available in active status with automotive-grade variants.

Cross-Manufacturer Alternatives: Parts from alternative manufacturers (Micro Commercial Co, Nexperia, NXP) meeting the same electrical specifications but with variations in impedance, power rating, or package format.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vz (Nom)	Tolerance	Power - Max	Zzt (Max)	Ir @ Vr	Vf (Max) @ If	Package	Packaging Format
MMSZ2V7T3G	onsemi	Obsolete	2.7 V	±5%	500 mW	100 Ω	20 µA @ 1 V	900 mV @ 10 mA	SOD-123	Cut Tape
MMSZ4682T1G	onsemi	Active	2.7 V	±5%	500 mW	—	1 µA @ 1 V	900 mV @ 10 mA	SOD-123	Tape & Reel
MMSZ5223BT1G	onsemi	Active	2.7 V	±5%	500 mW	30 Ω	75 µA @ 1 V	900 mV @ 10 mA	SOD-123	Cut Tape & Digi-Reel
SZMMSZ5223BT1G	onsemi	Active	2.7 V	±5%	500 mW	30 Ω	75 µA @ 1 V	900 mV @ 10 mA	SOD-123	Tape & Reel
MMSZ2V7T1G	onsemi	Active	2.7 V	±5%	500 mW	100 Ω	20 µA @ 1 V	900 mV @ 10 mA	SOD-123	Cut Tape & Digi-Reel
SZMMSZ2V7ET1G	onsemi	Active	2.7 V	±5%	500 mW	100 Ω	20 µA @ 1 V	900 mV @ 10 mA	SOD-123	Tape & Reel
SZMMSZ2V7T1G	onsemi	Active	2.7 V	±5%	500 mW	100 Ω	20 µA @ 1 V	900 mV @ 10 mA	SOD-123	Tape & Reel
MMSZ5223B-TP	Micro Commercial Co	Active	2.7 V	±5%	500 mW	30 Ω	75 µA @ 1 V	900 mV @ 10 mA	SOD-123	Tape & Reel
BZT52H-C2V7,115	Nexperia USA Inc.	Active	2.7 V	±5%	375 mW	83 Ω	20 µA @ 1 V	900 mV @ 10 mA	SOD-123F	Tape & Reel
PZU2.7BA,115	NXP USA Inc.	Active	2.7 V	±5%	320 mW	100 Ω	20 µA @ 1 V	1.1 V @ 100 mA	SOD-323	Bulk

Engineering Selection Recommendations

Recommended Primary Substitutes (onsemi, Active Status):

MMSZ2V7T1G is the closest functional equivalent to MMSZ2V7T3G. Both parts share identical electrical specifications including 100 Ohm impedance and 20 µA reverse leakage current. The primary difference is product status (Active vs. Obsolete) and packaging format availability. This part is suitable for direct replacement in all applications where the original part was specified.

SZMMSZ2V7T1G and SZMMSZ2V7ET1G are automotive-grade variants (AEC-Q101 qualified) with identical electrical parameters to the original part. These are appropriate for applications requiring automotive qualification or enhanced reliability standards.

Alternative Direct Substitutes (onsemi, Active Status):

MMSZ4682T1G meets all core electrical requirements with superior reverse leakage characteristics (1 µA vs. 20 µA). This part is suitable where lower leakage current provides design benefits.

MMSZ5223BT1G and SZMMSZ5223BT1G offer lower impedance (30 Ohm vs. 100 Ohm) with higher reverse leakage (75 µA vs. 20 µA). These parts are functionally compatible but exhibit different dynamic impedance characteristics.

Cross-Manufacturer Alternatives:

MMSZ5223B-TP (Micro Commercial Co) provides equivalent electrical performance with identical packaging and active product status.

BZT52H-C2V7,115 (Nexperia) is suitable for applications where reduced power rating (375 mW vs. 500 mW) is acceptable and automotive qualification is required. Package variant SOD-123F differs from SOD-123.

PZU2.7BA,115 (NXP) is suitable only for applications where reduced power rating (320 mW) and different package format (SOD-323) are compatible with board design. Forward voltage specification differs at higher current levels.

Frequently Asked Questions (FAQ)

Q: Can MMSZ2V7T1G be used as a direct replacement for MMSZ2V7T3G?

A: Yes. MMSZ2V7T1G is a direct functional equivalent with identical electrical specifications (2.7 V, 500 mW, 100 Ohm impedance, 20 µA reverse leakage). The primary difference is that MMSZ2V7T1G is in active production status while MMSZ2V7T3G is obsolete. Both are available in SOD-123 package with surface mount configuration.

Q: What is the difference between MMSZ2V7T1G and MMSZ5223BT1G?

A: Both parts meet the core specifications (2.7 V, 500 mW, SOD-123). The key difference is impedance: MMSZ2V7T1G has 100 Ohm maximum impedance with 20 µA reverse leakage, while MMSZ5223BT1G has 30 Ohm impedance with 75 µA reverse leakage. Selection depends on circuit requirements for dynamic impedance and leakage current characteristics.

Q: Are automotive-grade variants (SZMMSZ2V7T1G, SZMMSZ2V7ET1G) compatible with standard applications?

A: Yes. Automotive-grade variants are fully compatible with standard applications. These parts meet AEC-Q101 qualification and are suitable for any application where the original MMSZ2V7T3G was used. Automotive qualification provides additional reliability assurance.

Q: Can BZT52H-C2V7,115 replace MMSZ2V7T3G?

A: BZT52H-C2V7,115 is functionally compatible for most applications but has reduced power rating (375 mW vs. 500 mW) and uses SOD-123F package instead of SOD-123. Verify that the lower power rating and package variant are acceptable for the specific application.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) and Tape & Reel (TR) are different supply formats for the same component. Cut Tape is supplied in smaller quantities on individual tape strips, while Tape & Reel is supplied on continuous reels for automated assembly. Electrical specifications are identical; selection depends on production volume and assembly equipment compatibility.

Q: Is PZU2.7BA,115 suitable as a substitute?

A: PZU2.7BA,115 is suitable only if the application can accommodate a different package format (SOD-323 vs. SOD-123) and reduced power rating (320 mW vs. 500 mW). Forward voltage specification also differs at higher current levels (1.1 V @ 100 mA vs. 900 mV @ 10 mA). Verify board layout compatibility and circuit current requirements before selection.

Q: What does ±5% tolerance mean for the Zener voltage?

A: ±5% tolerance indicates that the actual Zener voltage will fall within ±5% of the nominal 2.7 V specification. This means the operating voltage range is 2.565 V to 2.835 V. All listed substitute parts share this same tolerance specification.

Q: Can I use MMSZ4682T1G if my circuit requires lower reverse leakage?

A: Yes. MMSZ4682T1G has superior reverse leakage characteristics (1 µA @ 1 V vs. 20 µA @ 1 V) while maintaining all other electrical specifications. This part is suitable for applications where minimizing reverse leakage current is a design requirement.

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