MMSZ4702 Equivalent & Substitute Parts

Part Overview

The MMSZ4702 is a Zener diode rated at 15 V nominal voltage with 500 mW maximum power dissipation in a surface mount SOD-123 package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The MMSZ4702 operates across a temperature range of -55°C to 150°C with ±5% voltage tolerance and is suitable for voltage regulation and protection applications in electronic circuits.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	15	V
Tolerance	±5%	-
Power - Max	500	mW
Current - Reverse Leakage @ Vr	50 nA @ 11.4 V	-
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	-
Operating Temperature	-55°C ~ 150°C	-
Mounting Type	Surface Mount	-
Package / Case	SOD-123	-

Substitute Part Grouping Explanation

Substitution of the MMSZ4702 is determined by the following critical parameters:

Zener Voltage (Vz): 15 V nominal
Power Rating: 500 mW maximum
Voltage Tolerance: ±5%
Package Type: SOD-123 surface mount
Forward Voltage (Vf): 900 mV maximum at 10 mA
Reverse Leakage Current: 50 nA at 11.4 V
Operating Temperature Range: -55°C to 150°C

Substitute parts are grouped into two categories based on product status and application grade:

Category 1: Standard Industrial Grade (Active Status) Parts with active product status suitable for general industrial applications: MMSZ4702T1G, MMSZ15T1G, MMSZ5245BT1G, MMSZ5245ET1G

Category 2: Automotive Grade (Active Status, AEC-Q101 Qualified) Parts with automotive qualification and active product status for automotive and high-reliability applications: SZMMSZ4702T1G, SZMMSZ15T1G, SZMMSZ15ET1G, SZMMSZ5245BT1G, SZMMSZ5245ET1G

Category 3: Alternative Manufacturer Parts from alternative manufacturers meeting equivalent electrical specifications: DDZ9702-7 (Diodes Incorporated)

Parameter Comparison

Part Number	Manufacturer	Product Status	Vz (V)	Tolerance	Power (mW)	Vf Max @ 10mA (mV)	Ir @ Vr (nA)	Temp Range (°C)	Package	Grade	Compliance
MMSZ4702	onsemi	Obsolete	15	±5%	500	900	50 @ 11.4V	-55 ~ 150	SOD-123	Industrial	ROHS3
MMSZ4702T1G	onsemi	Active	15	±5%	500	900	50 @ 11.4V	-55 ~ 150	SOD-123	Industrial	ROHS3
MMSZ15T1G	onsemi	Active	15	±5%	500	900	50 @ 10.5V	-55 ~ 150	SOD-123	Industrial	ROHS3
MMSZ5245BT1G	onsemi	Active	15	±5%	500	900	100 @ 11V	-55 ~ 150	SOD-123	Industrial	ROHS3
MMSZ5245ET1G	onsemi	Active	15	±5%	500	900	100 @ 11V	-55 ~ 150	SOD-123	Industrial	ROHS3
SZMMSZ4702T1G	onsemi	Active	15	-	500	900	50 @ 11.4V	-55 ~ 150	SOD-123	Automotive	ROHS3
SZMMSZ15T1G	onsemi	Active	15	±5%	500	900	50 @ 10.5V	-55 ~ 150	SOD-123	Automotive	ROHS3
SZMMSZ15ET1G	onsemi	Active	15	±5%	500	900	50 @ 10.5V	-55 ~ 150	SOD-123	Automotive	ROHS3
SZMMSZ5245BT1G	onsemi	Active	15	±5%	500	900	100 @ 11V	-55 ~ 150	SOD-123	Automotive	ROHS3
SZMMSZ5245ET1G	onsemi	Active	15	±5%	500	900	100 @ 11V	-55 ~ 150	SOD-123	Automotive	ROHS3
DDZ9702-7	Diodes Incorporated	Active	15	±5%	500	900	50 @ 11.4V	-65 ~ 150	SOD-123	Industrial	ROHS3

Engineering Selection Recommendations

For Direct Replacement (Industrial Applications)

MMSZ4702T1G is the primary direct replacement for the obsolete MMSZ4702. Both parts are manufactured by onsemi, share identical electrical specifications, and are packaged in SOD-123. MMSZ4702T1G carries active product status with ROHS3 compliance and significantly higher inventory availability (2,903,400 units).

For Industrial Applications with Alternative Packaging

MMSZ15T1G and MMSZ5245ET1G are functionally equivalent alternatives from onsemi. Both maintain the 15 V nominal voltage, 500 mW power rating, and SOD-123 package. These parts differ in reverse leakage current specifications and impedance characteristics but remain within the electrical operating envelope of the original MMSZ4702.

For Automotive Applications

SZMMSZ4702T1G, SZMMSZ15T1G, SZMMSZ15ET1G, SZMMSZ5245BT1G, and SZMMSZ5245ET1G are automotive-grade equivalents qualified to AEC-Q101 standard. These parts are suitable for automotive and high-reliability applications requiring automotive qualification. All maintain active product status and ROHS3 compliance.

For Alternative Manufacturer Supply

DDZ9702-7 from Diodes Incorporated provides an alternative source for the 15 V 500 mW SOD-123 Zener diode. This part meets equivalent electrical specifications and extends the operating temperature range to -65°C minimum. DDZ9702-7 carries active product status with ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can MMSZ4702T1G be used as a direct replacement for the obsolete MMSZ4702?

A: Yes. MMSZ4702T1G is the direct equivalent with identical electrical specifications, voltage rating, power dissipation, package type, and operating temperature range. The primary difference is product status: MMSZ4702T1G is active with significantly higher inventory availability.

Q: What is the difference between standard industrial grade and automotive grade Zener diodes?

A: Automotive-grade parts (SZMMSZ series) are qualified to AEC-Q101 standard and undergo additional qualification testing for automotive applications. Industrial-grade parts (MMSZ series) are suitable for general industrial use. Both meet ROHS3 compliance and share identical electrical specifications for the 15 V 500 mW rating.

Q: Are there differences in reverse leakage current between substitute parts?

A: Yes. The MMSZ4702 and DDZ9702-7 specify 50 nA reverse leakage at 11.4 V. The MMSZ15T1G and SZMMSZ15 series specify 50 nA at 10.5 V. The MMSZ5245 and SZMMSZ5245 series specify 100 nA at 11 V. These variations remain within acceptable operating parameters for voltage regulation and protection applications.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in Cut Tape (CT) & Digi-Reel® packaging and Tape & Reel (TR) packaging. All parts maintain the SOD-123 surface mount package type. Packaging selection depends on manufacturing and assembly requirements.

Q: Can DDZ9702-7 from Diodes Incorporated be used interchangeably with onsemi parts?

A: Yes. DDZ9702-7 meets equivalent electrical specifications for the 15 V nominal voltage, 500 mW power rating, ±5% tolerance, and SOD-123 package. DDZ9702-7 extends the minimum operating temperature to -65°C compared to -55°C for onsemi parts. Both manufacturers provide ROHS3 compliant parts with active product status.

Q: Which substitute part has the highest inventory availability?

A: MMSZ4702T1G has the highest inventory with 2,903,400 units in stock, followed by MMSZ15T1G with 116,100 units and DDZ9702-7 with 92,100 units.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance status. The original MMSZ4702 also carries ROHS3 compliance.

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