MMSZ4680-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The MMSZ4680-TP is a 2.2 V, 500 mW Zener diode manufactured by Micro Commercial Co in SOD-123 surface mount packaging. This component is classified as an active product and is supplied in Tape & Reel (TR) format. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage circuits. Substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and packaging specifications to ensure functional equivalence in circuit applications.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	2.2	V
Tolerance	±5%	-
Power - Max	500	mW
Current - Reverse Leakage @ Vr	4	µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	950	mV @ 10 mA
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

Substitute parts for the MMSZ4680-TP are qualified based on the following criteria:

Electrical Equivalence: All substitute parts maintain the nominal Zener voltage of 2.2 V, maximum power dissipation of 500 mW, and reverse leakage current of 4 µA @ 1 V. These parameters define the core functional performance of the Zener diode in voltage regulation and protection applications.

Mechanical Compatibility: All substitute parts use the SOD-123 surface mount package, ensuring physical and electrical compatibility with existing PCB layouts and assembly processes.

Environmental Compliance: All substitute parts are ROHS3 compliant, REACH unaffected, and classified as MSL 1 (Unlimited moisture sensitivity level), matching the environmental and regulatory requirements of the main part.

Packaging Format Variations: Substitute parts are available in Cut Tape (CT) & Digi-Reel® or Tape & Reel (TR) formats. These packaging variations do not affect electrical or mechanical performance and are selected based on procurement and assembly requirements.

Automotive Grade Variants: Two substitute parts (SZMMSZ4680ET1G and SZMMSZ4680T1G) include AEC-Q101 automotive qualification, providing enhanced reliability for automotive applications while maintaining electrical equivalence.

Parameter Comparison

Parameter	MMSZ4680-TP (Micro Commercial Co)	MMSZ4680T1G (onsemi)	SZMMSZ4680ET1G (onsemi)	SZMMSZ4680T1G (onsemi)
Manufacturer	Micro Commercial Co	onsemi	onsemi	onsemi
Voltage - Zener (Nom)	2.2 V	2.2 V	2.2 V	2.2 V
Tolerance	±5%	±5%	±5%	-
Power - Max	500 mW	500 mW	500 mW	500 mW
Current - Reverse Leakage @ Vr	4 µA @ 1 V	4 µA @ 1 V	4 µA @ 1 V	4.5 µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	950 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature Range	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOD-123	SOD-123	SOD-123	SOD-123
Packaging Format	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Tape & Reel (TR)
Grade	Standard	Standard	Automotive	Automotive
Qualification	-	-	AEC-Q101	AEC-Q101
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

Standard Applications: For general-purpose voltage regulation and overvoltage protection circuits, MMSZ4680T1G provides direct electrical equivalence with identical nominal Zener voltage, power rating, and operating temperature range. This part is available in Cut Tape & Digi-Reel® packaging, suitable for high-volume automated assembly.

Automotive and High-Reliability Applications: SZMMSZ4680ET1G and SZMMSZ4680T1G are qualified to AEC-Q101 automotive standards and are specified for applications requiring enhanced reliability and traceability in automotive environments. Both parts maintain electrical equivalence while providing automotive-grade qualification.

Packaging Considerations: MMSZ4680-TP and SZMMSZ4680ET1G and SZMMSZ4680T1G are supplied in Tape & Reel (TR) format, suitable for reel-fed assembly equipment. MMSZ4680T1G is available in Cut Tape & Digi-Reel® format for applications requiring smaller quantities or alternative handling methods.

Forward Voltage Characteristics: MMSZ4680-TP specifies a maximum forward voltage of 950 mV @ 10 mA, while all onsemi substitute parts specify 900 mV @ 10 mA. This 50 mV difference is within acceptable circuit design margins for typical Zener diode applications and does not affect functional substitution.

Reverse Leakage Current: SZMMSZ4680T1G specifies a reverse leakage current of 4.5 µA @ 1 V, compared to 4 µA @ 1 V for the main part and other substitutes. This 0.5 µA variation is within acceptable tolerances for voltage regulation and protection circuits.

Frequently Asked Questions (FAQ)

Q: Can MMSZ4680T1G be used as a direct replacement for MMSZ4680-TP?

A: Yes. Both parts share identical nominal Zener voltage (2.2 V), power rating (500 mW), operating temperature range (-55°C to 150°C), and SOD-123 package specification. The primary difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel) and manufacturer (onsemi versus Micro Commercial Co).

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

A: SZMMSZ4680ET1G and SZMMSZ4680T1G are qualified to AEC-Q101 automotive standards, indicating enhanced reliability testing and traceability requirements for automotive applications. Electrical specifications remain equivalent to standard-grade parts.

Q: Are there differences in forward voltage between substitute parts?

A: MMSZ4680-TP specifies 950 mV @ 10 mA forward voltage, while onsemi substitutes specify 900 mV @ 10 mA. This 50 mV difference is within normal design margins and does not affect circuit functionality in typical voltage regulation or protection applications.

Q: Which substitute part should be selected for high-volume production?

A: MMSZ4680T1G in Cut Tape & Digi-Reel® format is optimized for high-volume automated assembly. SZMMSZ4680T1G in Tape & Reel format is suitable for reel-fed assembly equipment. Selection depends on existing assembly equipment and procurement requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts (MMSZ4680T1G, SZMMSZ4680ET1G, and SZMMSZ4680T1G) are ROHS3 compliant and REACH unaffected, matching the environmental compliance of the main part.

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

A: MSL 1 indicates unlimited shelf life and no moisture bake-out requirement prior to soldering. All parts in this comparison carry MSL 1 classification, ensuring consistent handling and storage procedures.

Q: Can SZMMSZ4680T1G be used in non-automotive applications?

A: Yes. SZMMSZ4680T1G maintains full electrical equivalence with the main part and can be used in any application where MMSZ4680-TP is specified. Automotive qualification does not restrict use in standard applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message