MMSZ5228B-TP Zener Diode 3.9V 500mW SOD-123 Equivalent & Substitute Parts

Part Overview

The MMSZ5228B-TP is a surface mount Zener diode manufactured by Micro Commercial Co, rated at 3.9 V nominal with 500 mW maximum power dissipation in SOD-123 package. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific requirements such as automotive qualification or alternative packaging formats.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	3.9	V
Tolerance	±5%	-
Power - Max	500	mW
Package / Case	SOD-123	-
Mounting Type	Surface Mount	-
Operating Temperature Range	-55°C to 150°C	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the MMSZ5228B-TP is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): 3.9 V
Power - Max: 500 mW
Package / Case: SOD-123
Mounting Type: Surface Mount
Tolerance: ±5%
Operating Temperature Range: -55°C to 150°C minimum
RoHS Status: ROHS3 Compliant

Direct Equivalents maintain all primary parameters and differ only in manufacturer, impedance characteristics, or reverse leakage specifications within acceptable ranges.

Similar Parts share the same voltage, package, and mounting type but differ in power rating (370 mW or 410 mW), impedance, or temperature range. These are suitable for applications with reduced power requirements or extended temperature specifications.

Automotive-Qualified Variants include AEC-Q101 certification and are designated with "SZ" prefix (SZMMSZ3V9T1G, SZMMSZ4686T1G). These are appropriate for automotive and high-reliability applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Zzt (Max)	Vf (Max) @ If	Temp Range	Packaging	Grade
MMSZ5228B-TP	Micro Commercial Co	3.9 V	±5%	500 mW	23 Ω	900 mV @ 10 mA	-55°C to 150°C	Tape & Reel	Standard
MMSZ3V9T1G	onsemi	3.9 V	±5%	500 mW	90 Ω	900 mV @ 10 mA	-55°C to 150°C	Cut Tape & Digi-Reel	Standard
MMSZ4686T1G	onsemi	3.9 V	±5%	500 mW	Not Specified	900 mV @ 10 mA	-55°C to 150°C	Cut Tape & Digi-Reel	Standard
MMSZ5228B-7-F	Diodes Incorporated	3.9 V	±5%	500 mW	23 Ω	900 mV @ 10 mA	-65°C to 150°C	Cut Tape & Digi-Reel	Standard
SZMMSZ3V9T1G	onsemi	3.9 V	±5%	500 mW	90 Ω	900 mV @ 10 mA	-55°C to 150°C	Cut Tape & Digi-Reel	Automotive AEC-Q101
SZMMSZ4686T1G	onsemi	3.9 V	±5%	500 mW	Not Specified	900 mV @ 10 mA	-55°C to 150°C	Tape & Reel	Automotive AEC-Q101
BZT52C3V9-7-F	Diodes Incorporated	3.9 V	±5%	500 mW	90 Ω	900 mV @ 10 mA	-65°C to 150°C	Tape & Reel	Standard
BZT52C3V9-13-F	Diodes Incorporated	3.9 V	±5.13%	370 mW	90 Ω	900 mV @ 10 mA	-65°C to 150°C	Tape & Reel	Automotive AEC-Q101
BZT52C3V9-E3-08	Vishay General Semiconductor	3.9 V	±5%	410 mW	95 Ω	900 mV @ 10 mA	Not Specified	Tape & Reel	Standard
CMHZ5228B TR PBFREE	Central Semiconductor Corp	3.9 V	±5%	500 mW	23 Ω	900 mV @ 10 mA	-65°C to 150°C	Tape & Reel	Standard
DDZ9686-7	Diodes Incorporated	3.9 V	±5%	500 mW	Not Specified	900 mV @ 10 mA	-65°C to 150°C	Tape & Reel	Standard

Engineering Selection Recommendations

Full Electrical and Mechanical Equivalents: MMSZ5228B-7-F (Diodes Incorporated), CMHZ5228B TR PBFREE (Central Semiconductor Corp), and MMSZ3V9T1G (onsemi) are direct functional equivalents with identical voltage, power rating, and tolerance specifications. MMSZ5228B-7-F and CMHZ5228B TR PBFREE extend the lower operating temperature to -65°C, providing enhanced performance margin in cold environments.

Automotive-Qualified Alternatives: SZMMSZ3V9T1G and SZMMSZ4686T1G are AEC-Q101 qualified variants suitable for automotive and mission-critical applications. These parts maintain the 3.9 V / 500 mW specification and are ROHS3 compliant.

Reduced Power Rating Alternatives: BZT52C3V9-13-F (370 mW) and BZT52C3V9-E3-08 (410 mW) are suitable for applications where the full 500 mW power dissipation is not required. These parts maintain the 3.9 V nominal voltage and SOD-123 package.

Extended Temperature Range: MMSZ5228B-7-F, BZT52C3V9-7-F, CMHZ5228B TR PBFREE, and DDZ9686-7 operate from -65°C to 150°C, compared to the standard -55°C to 150°C range of the MMSZ5228B-TP.

All substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental compliance profile.

Frequently Asked Questions (FAQ)

Q: Can MMSZ3V9T1G replace MMSZ5228B-TP directly? A: Yes. Both parts share identical voltage (3.9 V), power rating (500 mW), tolerance (±5%), and operating temperature range (-55°C to 150°C). The primary difference is packaging format (Cut Tape & Digi-Reel vs. Tape & Reel) and impedance specification (90 Ω vs. 23 Ω). Impedance differences do not affect functional substitution in standard voltage regulation applications.

Q: What is the difference between standard and automotive-qualified variants? A: Automotive-qualified parts (SZMMSZ3V9T1G, SZMMSZ4686T1G) carry AEC-Q101 certification, indicating compliance with automotive reliability and quality standards. These parts are suitable for automotive, aerospace, and high-reliability applications. Standard variants lack this certification.

Q: Can I use BZT52C3V9-13-F (370 mW) in place of MMSZ5228B-TP (500 mW)? A: BZT52C3V9-13-F is a similar part with reduced power rating. Substitution is valid only if the application's power dissipation requirement does not exceed 370 mW. If the circuit requires the full 500 mW capability, this part is not suitable.

Q: What packaging options are available? A: The MMSZ5228B-TP is supplied in Tape & Reel format. Equivalent parts are available in Cut Tape & Digi-Reel (MMSZ3V9T1G, MMSZ4686T1G, SZMMSZ3V9T1G) or Tape & Reel (MMSZ5228B-7-F, BZT52C3V9-7-F, CMHZ5228B TR PBFREE, DDZ9686-7, SZMMSZ4686T1G). Packaging selection depends on assembly and handling requirements.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All parts listed in this reference maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the environmental compliance of the original MMSZ5228B-TP.

Q: What is the significance of impedance (Zzt) differences? A: Impedance affects the dynamic resistance of the Zener diode at operating current. Lower impedance (23 Ω) provides tighter voltage regulation under load changes. Higher impedance (90 Ω, 95 Ω) results in slightly softer regulation. For most standard voltage reference applications, both values are functionally acceptable.

Q: Can I substitute parts with different temperature ranges? A: Yes, if the application environment permits. Parts rated to -65°C (MMSZ5228B-7-F, BZT52C3V9-7-F, CMHZ5228B TR PBFREE, DDZ9686-7) provide extended cold-temperature performance compared to the standard -55°C minimum. This substitution is always safe for applications operating within the standard range.

Q: What reverse leakage current differences exist? A: Reverse leakage varies by manufacturer: 10 µA @ 1 V (MMSZ5228B-TP, CMHZ5228B TR PBFREE), 3 µA @ 1 V (MMSZ3V9T1G, SZMMSZ3V9T1G, BZT52C3V9-7-F, BZT52C3V9-13-F), and 5 µA @ 2 V (MMSZ4686T1G, SZMMSZ4686T1G, DDZ9686-7). Lower leakage improves standby power consumption in battery-powered applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message