MMSZ4697 Equivalent & Substitute Parts

Part Overview

The MMSZ4697 is a Zener diode rated at 10 V nominal voltage with 500 mW power dissipation in a surface mount SOD-123 package. Manufactured by onsemi, this component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design requirements and production continuity. The electrical and mechanical specifications of this diode establish the baseline criteria for determining compatible alternatives across active product lines.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	10	V
Tolerance	±5%	—
Power - Max	500	mW
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	—
Operating Temperature Range	-55°C ~ 150°C	—
Mounting Type	Surface Mount	—
Package / Case	SOD-123	—

Substitute Part Grouping Explanation

Substitution of the MMSZ4697 is determined by strict equivalence across the following electrical and mechanical parameters:

Primary Substitution Criteria:

Zener voltage: 10 V nominal
Power rating: 500 mW maximum
Forward voltage: 900 mV maximum at 10 mA
Operating temperature range: -55°C to 150°C minimum
Package: SOD-123 surface mount
Tolerance: ±5% or tighter

Substitution Categories:

Direct Equivalents (onsemi Standard Grade): Parts maintaining identical electrical specifications and standard commercial grade. These include MMSZ4697T1G, MMSZ10T1G, and MMSZ5240BT1G, all with active product status and RoHS3 compliance.

Automotive Grade Equivalents (onsemi): Parts with AEC-Q101 qualification and automotive-grade designation (SZMMSZ series). These include SZMMSZ10T1G, SZMMSZ10T3G, SZMMSZ4697T1G, and SZMMSZ5240BT1G, suitable for applications requiring automotive qualification.

Cross-Manufacturer Equivalents: Parts from alternative manufacturers meeting identical electrical and package specifications. MMSZ5240B-TP (Micro Commercial Co) and CMHZ4697 TR PBFREE (Central Semiconductor Corp) provide functional equivalence with active product status.

Similar Specification Parts: BZT52C10LP-7 (Diodes Incorporated) operates at the same 10 V zener voltage but with reduced power rating (250 mW) and different package format (0402/X1-DFN1006-2), suitable only where power dissipation requirements are lower.

Parameter Comparison

Part Number	Manufacturer	Product Status	Vz (Nom)	Tolerance	Power Max	Vf (Max) @ If	Temp Range	Package	Grade
MMSZ4697	onsemi	Obsolete	10 V	±5%	500 mW	900 mV @ 10 mA	-55°C ~ 150°C	SOD-123	Standard
MMSZ4697T1G	onsemi	Active	10 V	±5%	500 mW	900 mV @ 10 mA	-55°C ~ 150°C	SOD-123	Standard
MMSZ10T1G	onsemi	Active	10 V	±5%	500 mW	900 mV @ 10 mA	-55°C ~ 150°C	SOD-123	Standard
MMSZ5240BT1G	onsemi	Active	10 V	±5%	500 mW	900 mV @ 10 mA	-55°C ~ 150°C	SOD-123	Standard
SZMMSZ10T1G	onsemi	Active	10 V	±5%	500 mW	900 mV @ 10 mA	-55°C ~ 150°C	SOD-123	Automotive (AEC-Q101)
SZMMSZ10T3G	onsemi	Active	10 V	±5%	500 mW	900 mV @ 10 mA	-55°C ~ 150°C	SOD-123	Automotive (AEC-Q101)
SZMMSZ4697T1G	onsemi	Active	10 V	±5%	500 mW	900 mV @ 10 mA	-55°C ~ 150°C	SOD-123	Automotive (AEC-Q101)
SZMMSZ5240BT1G	onsemi	Active	10 V	±5%	500 mW	900 mV @ 10 mA	-55°C ~ 150°C	SOD-123	Automotive (AEC-Q101)
MMSZ5240B-TP	Micro Commercial Co	Active	10 V	±5%	500 mW	900 mV @ 10 mA	-55°C ~ 150°C	SOD-123	Standard
CMHZ4697 TR PBFREE	Central Semiconductor Corp	Active	10 V	±5%	500 mW	1.5 V @ 100 mA	-65°C ~ 150°C	SOD-123	Standard
BZT52C10LP-7	Diodes Incorporated	Active	10 V	±6%	250 mW	900 mV @ 10 mA	-65°C ~ 150°C	0402 (X1-DFN1006-2)	Standard

Engineering Selection Recommendations

For Direct Replacement (Standard Commercial Applications):

MMSZ4697T1G is the primary active equivalent from onsemi, maintaining identical electrical specifications and SOD-123 packaging. This part carries RoHS3 compliance and active product status with substantial inventory availability (70,200 units). Selection of this part ensures electrical and mechanical compatibility without design modification.

MMSZ10T1G and MMSZ5240BT1G provide functional equivalence with active status and RoHS3 compliance. These parts are suitable where the base product number variation is acceptable within design specifications.

MMSZ5240B-TP (Micro Commercial Co) offers cross-manufacturer equivalence with identical electrical and package specifications, active product status, and RoHS3 compliance. This option provides supply chain diversification.

For Automotive Applications:

SZMMSZ4697T1G, SZMMSZ10T1G, SZMMSZ10T3G, and SZMMSZ5240BT1G are automotive-grade alternatives with AEC-Q101 qualification. These parts maintain identical electrical specifications and SOD-123 packaging while meeting automotive qualification requirements. Selection depends on application-specific automotive standards and supply chain requirements.

For Extended Temperature Range:

CMHZ4697 TR PBFREE (Central Semiconductor Corp) extends the lower operating temperature to -65°C while maintaining the upper limit at 150°C. This part is suitable for applications requiring enhanced low-temperature performance. Note that forward voltage specification differs (1.5 V @ 100 mA versus 900 mV @ 10 mA), which may affect circuit behavior in forward-biased conditions.

For Reduced Power Dissipation Applications:

BZT52C10LP-7 (Diodes Incorporated) operates at 250 mW maximum power with a different package format (0402/X1-DFN1006-2). This part is suitable only for applications where power dissipation requirements are lower than 500 mW and where the smaller package footprint is acceptable. The ±6% tolerance is slightly wider than the ±5% specification of the original part.

Frequently Asked Questions (FAQ)

Q: Can MMSZ4697T1G be used as a direct replacement for the obsolete MMSZ4697?

A: Yes. MMSZ4697T1G is electrically and mechanically identical to MMSZ4697, with identical zener voltage (10 V), power rating (500 mW), tolerance (±5%), forward voltage (900 mV @ 10 mA), operating temperature range (-55°C to 150°C), and SOD-123 package. The primary difference is product status (active versus obsolete) and RoHS3 compliance certification.

Q: What is the difference between standard onsemi parts (MMSZ series) and automotive-grade parts (SZMMSZ series)?

A: Automotive-grade parts (SZMMSZ series) carry AEC-Q101 qualification and are designated for automotive applications. Electrically and mechanically, they are equivalent to standard-grade parts. The SZMMSZ designation indicates compliance with automotive qualification standards. Selection between standard and automotive grades depends on application requirements and end-use specifications.

Q: Can I substitute MMSZ5240BT1G for MMSZ4697?

A: Yes. MMSZ5240BT1G meets all electrical and mechanical substitution criteria: 10 V zener voltage, 500 mW power rating, ±5% tolerance, 900 mV forward voltage at 10 mA, -55°C to 150°C operating range, and SOD-123 package. The base product number differs (MMSZ524 versus MMSZ4697), but electrical performance is equivalent.

Q: Is BZT52C10LP-7 a suitable replacement for MMSZ4697?

A: BZT52C10LP-7 is not a direct replacement. While it maintains the 10 V zener voltage and SOD-123 package family, it has a reduced power rating (250 mW versus 500 mW) and uses a different package format (0402/X1-DFN1006-2 versus SOD-123). This part is suitable only for applications where power dissipation is limited to 250 mW or less and where the smaller package footprint is compatible with board layout.

Q: What are the advantages of using CMHZ4697 TR PBFREE from Central Semiconductor Corp?

A: CMHZ4697 TR PBFREE provides cross-manufacturer supply chain diversification while maintaining 10 V zener voltage, 500 mW power rating, ±5% tolerance, and SOD-123 packaging. It extends the lower operating temperature to -65°C (versus -55°C for MMSZ4697). However, the forward voltage specification differs (1.5 V @ 100 mA versus 900 mV @ 10 mA), which may affect circuit performance in forward-biased operation.

Q: Are all substitute parts RoHS3 compliant?

A: All active substitute parts listed carry RoHS3 compliance certification. The original MMSZ4697 (obsolete) does not have RoHS3 status specified in the provided data. RoHS3 compliance is a standard requirement for all active onsemi, Micro Commercial Co, Central Semiconductor Corp, and Diodes Incorporated parts in this product category.

Q: What packaging options are available for 10 V 500 mW zener diodes?

A: All direct equivalents and most cross-manufacturer substitutes use SOD-123 surface mount packaging. BZT52C10LP-7 uses a smaller 0402 (X1-DFN1006-2) package format. Packaging selection depends on board layout requirements and thermal management considerations. SOD-123 is the standard package for 500 mW zener diodes in this voltage class.

Q: Can I use automotive-grade parts (SZMMSZ series) in non-automotive applications?

A: Yes. Automotive-grade parts meet or exceed the electrical and mechanical specifications of standard-grade parts. Using automotive-grade components in non-automotive applications introduces no functional incompatibility; however, it may result in higher component cost without corresponding benefit if automotive qualification is not required.

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