MMSZ4704-TP Zener Diode 17V 500mW SOD-123 Equivalent & Substitute Parts

Part Overview

The MMSZ4704-TP is a 17V 500mW Zener diode manufactured by Micro Commercial Co in SOD-123 surface mount packaging. This component is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). The part operates across a temperature range of -55°C to 150°C with ±5% voltage tolerance and is suitable for general-purpose voltage regulation and protection applications in surface mount designs.

Substitute parts are necessary when the primary part experiences supply constraints, inventory limitations, or when design requirements permit selection from multiple qualified manufacturers offering equivalent electrical and mechanical characteristics.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	17	V
Power - Maximum	500	mW
Tolerance	±5	%
Mounting Type	Surface Mount	—
Package / Case	SOD-123	—
Operating Temperature Range	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the MMSZ4704-TP is determined by the following critical parameters:

Primary Substitution Criteria:

Zener voltage: 17V nominal
Power dissipation: 500mW maximum
Package type: SOD-123 surface mount
Mounting configuration: Surface mount
RoHS3 compliance status
Moisture sensitivity level: MSL 1

Secondary Compatibility Factors:

Voltage tolerance (±5% or tighter acceptable)
Operating temperature range (-55°C to 150°C minimum)
Current reverse leakage characteristics
Forward voltage characteristics

Parts are grouped as direct substitutes when all primary criteria are met. Parts with tighter voltage tolerance (±3% or ±2%) or extended temperature ranges (-65°C minimum) are classified as compatible alternatives with enhanced specifications. Automotive-grade parts with AEC-Q101 qualification are identified separately due to additional qualification requirements, though they remain electrically and mechanically compatible.

Parameter Comparison

Manufacturer	Part Number	Vz (Nom)	Tolerance	Power Max	Temp Range	Product Status	Automotive Grade
Micro Commercial Co	MMSZ4704-TP	17V	±5%	500mW	-55 to 150°C	Active	No
Vishay General Semiconductor	MMSZ4704-E3-08	17V	±5%	500mW	-55 to 150°C	Active	No
Central Semiconductor Corp	CMHZ5247B TR PBFREE	17V	±5%	500mW	-65 to 150°C	Active	No
Diodes Incorporated	DDZ17-7	17V	±3%	500mW	-65 to 150°C	Active	No
Vishay General Semiconductor	MMSZ4704-HE3-08	17V	±5%	500mW	-55 to 150°C	Obsolete	Yes (AEC-Q101)
onsemi	MMSZ4704T1G	17V	±5%	500mW	-55 to 150°C	Active	No
onsemi	MMSZ5247BT1G	17V	±5%	500mW	-55 to 150°C	Active	No
onsemi	MMSZ5247BT3G	17V	±5%	500mW	-55 to 150°C	Active	No
Vishay General Semiconductor	MMSZ5247C-HE3-08	17V	±2%	500mW	-55 to 150°C	Obsolete	Yes (AEC-Q101)
onsemi	SZMMSZ4704T1G	17V	±5%	500mW	-55 to 150°C	Active	Yes (AEC-Q101)
onsemi	SZMMSZ4704T3G	17V	—	500mW	-55 to 150°C	Active	Yes (AEC-Q101)

Engineering Selection Recommendations

Active Status Parts - Recommended for New Designs:

The following parts are in active production status and are recommended for new circuit designs and ongoing procurement:

MMSZ4704-E3-08 (Vishay General Semiconductor): Direct electrical and mechanical equivalent with identical specifications. Suitable for general-purpose applications requiring standard voltage tolerance.
CMHZ5247B TR PBFREE (Central Semiconductor Corp): Extended operating temperature range (-65°C minimum) provides enhanced thermal margin. Acceptable for applications requiring broader temperature performance.
DDZ17-7 (Diodes Incorporated): Tighter voltage tolerance (±3%) and extended temperature range (-65°C minimum) offer improved accuracy and thermal performance. Highest inventory availability (155,200 units).
MMSZ4704T1G (onsemi): Direct equivalent with standard specifications. Active production status ensures long-term availability.
MMSZ5247BT1G and MMSZ5247BT3G (onsemi): Both parts meet all electrical and mechanical requirements. MMSZ5247BT1G offers higher inventory (20,100 units).
SZMMSZ4704T1G (onsemi): Automotive-grade part with AEC-Q101 qualification. Suitable for automotive and mission-critical applications requiring enhanced qualification documentation.
SZMMSZ4704T3G (onsemi): Automotive-grade alternative with AEC-Q101 qualification and high inventory availability (20,545 units).

Obsolete Status Parts - Not Recommended for New Designs:

MMSZ4704-HE3-08 (Vishay General Semiconductor): Obsolete product status. Use only for legacy system maintenance or replacement applications.
MMSZ5247C-HE3-08 (Vishay General Semiconductor): Obsolete product status with tighter tolerance (±2%). Use only for legacy system maintenance where enhanced accuracy is required.

Frequently Asked Questions (FAQ)

Q: Can MMSZ4704-TP be directly replaced with MMSZ4704-E3-08?

A: Yes. Both parts share identical electrical specifications (17V, 500mW, ±5% tolerance) and SOD-123 surface mount packaging. The MMSZ4704-E3-08 is manufactured by Vishay General Semiconductor and is in active production status, making it a direct substitute.

Q: What is the difference between standard and automotive-grade substitutes?

A: Automotive-grade parts (SZMMSZ4704T1G, SZMMSZ4704T3G, MMSZ4704-HE3-08, MMSZ5247C-HE3-08) carry AEC-Q101 qualification, indicating compliance with automotive industry reliability and qualification standards. These parts are suitable for automotive applications and mission-critical systems. Standard-grade parts are suitable for general industrial and consumer applications.

Q: Are parts with tighter voltage tolerance (±3% or ±2%) compatible?

A: Yes. Parts with tighter tolerance specifications (DDZ17-7 at ±3%, MMSZ5247C-HE3-08 at ±2%) are compatible substitutes. Tighter tolerance provides improved voltage accuracy and is acceptable in applications designed for standard ±5% tolerance.

Q: Can I use a substitute with an extended temperature range (-65°C minimum)?

A: Yes. Parts with extended temperature ranges (CMHZ5247B TR PBFREE and DDZ17-7 rated to -65°C) are compatible substitutes. Extended temperature range provides additional thermal margin and is acceptable for applications designed for -55°C minimum operation.

Q: Why are some substitute parts listed as obsolete?

A: Obsolete parts (MMSZ4704-HE3-08, MMSZ5247C-HE3-08) are no longer in active production. These parts should be used only for legacy system maintenance or replacement applications where original part numbers must be maintained. For new designs, select from active status alternatives.

Q: What is the significance of MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 indicates unlimited shelf life and no moisture sensitivity precautions required during storage or handling. All listed substitute parts carry MSL 1 rating, ensuring compatibility with standard manufacturing and storage practices.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant, matching the compliance status of the MMSZ4704-TP. This ensures compatibility with RoHS-regulated applications and supply chains.

Q: Which substitute offers the highest inventory availability?

A: DDZ17-7 (Diodes Incorporated) offers the highest inventory availability at 155,200 units in stock. This part also provides tighter voltage tolerance (±3%) and extended temperature range (-65°C minimum).

Q: Can I mix different substitute parts in the same circuit board assembly?

A: Yes. All listed substitute parts meet the same electrical and mechanical specifications for the 17V 500mW SOD-123 Zener diode function. Mixing different manufacturers or part numbers in the same assembly is acceptable from an electrical standpoint. However, design documentation should reflect the actual part numbers used for traceability and future maintenance.

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