MMSZ4703-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The MMSZ4703-TP is a 16 V, 500 mW Zener diode manufactured by Micro Commercial Co in SOD-123 surface mount packaging. This component is designed for voltage regulation and protection applications requiring precise 16 V reference voltage with ±5% tolerance. The part maintains Active product status and is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same package type and performance envelope. Alternative sources become necessary due to inventory availability, supply chain optimization, or design flexibility requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	16	V
Tolerance	±5	%
Power - Maximum	500	mW
Current - Reverse Leakage @ Vr	50 nA @ 11.4 V	nA
Voltage - Forward (Max) @ If	900 mV @ 10 mA	mV
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount
Package / Case	SOD-123
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MMSZ4703-TP is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

Zener voltage: 16 V nominal
Tolerance: ±5%
Maximum power dissipation: 500 mW
Reverse leakage current: 50 nA specification
Forward voltage: 900 mV maximum at 10 mA
Operating temperature range: -55°C to 150°C

Mechanical Equivalence Requirements:

Package type: SOD-123 surface mount
Mounting configuration: Surface mount compatible

Compliance Requirements:

RoHS3 compliance mandatory
Moisture sensitivity level: MSL 1 (Unlimited)
Active product status

The MMSZ4703T1G manufactured by onsemi meets all electrical and mechanical equivalence criteria, with identical nominal specifications and package configuration. Both parts share the same base product number (MMSZ4703) and maintain equivalent performance characteristics within specified tolerances.

Parameter Comparison

Parameter	MMSZ4703-TP (Micro Commercial Co)	MMSZ4703T1G (onsemi)	Match Status
Voltage - Zener (Nom)	16 V	16 V	Equivalent
Tolerance	±5%	±5%	Equivalent
Power - Max	500 mW	500 mW	Equivalent
Current - Reverse Leakage @ Vr	50 nA @ 11.4 V	50 nA @ 12.1 V	Equivalent
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	Equivalent
Operating Temperature	-55°C ~ 150°C	-55°C ~ 150°C	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package / Case	SOD-123	SOD-123	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent

Engineering Selection Recommendations

Primary Part: MMSZ4703-TP

The MMSZ4703-TP is the specified component with confirmed Active product status and full RoHS3 compliance. Current inventory of 1950 pieces supports immediate procurement for standard applications.

Approved Substitute: MMSZ4703T1G

The MMSZ4703T1G manufactured by onsemi is a direct electrical and mechanical equivalent with identical performance specifications. This substitute maintains:

Identical zener voltage and tolerance specifications
Equivalent power dissipation rating
Matching forward voltage characteristics
Identical operating temperature envelope
SOD-123 package compatibility
Full RoHS3 and REACH compliance
MSL 1 moisture sensitivity rating

The onsemi variant provides significantly higher inventory availability (125,400 pieces) and is suitable for direct substitution in applications where the MMSZ4703-TP is specified. Both parts share the same base product number and are functionally interchangeable within the defined electrical and thermal operating parameters.

Frequently Asked Questions (FAQ)

Q: Can MMSZ4703T1G replace MMSZ4703-TP in production designs?

A: Yes. The MMSZ4703T1G is electrically and mechanically equivalent. Both parts maintain identical zener voltage (16 V), tolerance (±5%), power rating (500 mW), and SOD-123 package configuration. Reverse leakage current specifications are equivalent at their respective test voltages (11.4 V vs. 12.1 V), and forward voltage characteristics are identical.

Q: Are there package compatibility concerns between these parts?

A: No. Both MMSZ4703-TP and MMSZ4703T1G use SOD-123 surface mount packaging with identical mechanical dimensions and land pattern requirements. PCB layout and reflow profiles remain unchanged.

Q: What compliance certifications apply to both parts?

A: Both parts are RoHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. ECCN classification is EAR99 for both variants.

Q: How do reverse leakage current specifications differ between the parts?

A: The MMSZ4703-TP specifies 50 nA at 11.4 V reverse voltage, while MMSZ4703T1G specifies 50 nA at 12.1 V. Both maintain the same leakage current magnitude within the specified test conditions. This difference reflects manufacturer test methodology and does not affect functional equivalence.

Q: What is the operating temperature range for both parts?

A: Both parts operate across -55°C to 150°C junction temperature range, supporting applications requiring extended thermal performance.

Q: Are there inventory or lead time advantages to using the substitute?

A: The MMSZ4703T1G maintains significantly higher inventory (125,400 pieces) compared to the primary part (1,950 pieces), providing supply chain flexibility for high-volume production requirements.

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