MMXZ5230B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The MMXZ5230B-TP is a 4.7 V, 200 mW surface mount zener diode manufactured by Micro Commercial Co in SOD-323 packaging. This component is classified as Active and maintains full inventory availability. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage applications across consumer and industrial electronics. Equivalent and substitute parts are identified based on matching electrical characteristics and mechanical compatibility within the SOD-323 and SOD-323F package families.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	4.7	V
Tolerance	±5%	—
Power - Maximum	200	mW
Impedance (Maximum)	19	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 2 V
Voltage - Forward (Maximum) @ If	1.2	V @ 100 mA
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SC-76, SOD-323	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the MMXZ5230B-TP is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 4.7 V nominal
Power dissipation: 200 mW or greater
Tolerance: ±5% or tighter
Package compatibility: SOD-323 or SOD-323F
Operating temperature range: -55°C to 150°C minimum
Surface mount configuration

Substitution Logic:

Direct Equivalents maintain identical electrical specifications and package form factor (SOD-323). These parts are pin-compatible and functionally interchangeable without circuit modification.

Upgraded Substitutes provide equal or superior electrical performance with enhanced power ratings (300 mW to 550 mW) or improved tolerance (±2% vs. ±5%). These parts use SOD-323F packaging, which is mechanically compatible with SOD-323 footprints in most applications. Upgraded substitutes offer additional design margin for voltage regulation and protection circuits.

Similar Alternatives meet the core voltage and power requirements but may differ in impedance, leakage current, or forward voltage characteristics. These parts are suitable when circuit design permits tolerance of parameter variations within the specified ranges.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Vf (Max) @ If	Temp Range	Package	Status
MMXZ5230B-TP	Micro Commercial Co	4.7 V	±5%	200 mW	19 Ω	1.2 V @ 100 mA	-55 to 150°C	SOD-323	Active
MMSZ5230BS-7-F	Diodes Incorporated	4.7 V	±5%	200 mW	19 Ω	900 mV @ 10 mA	-65 to 150°C	SOD-323	Active
MM3Z4V7B	onsemi	4.7 V	±2%	200 mW	75 Ω	1 V @ 10 mA	-65 to 150°C	SOD-323F	Active
MM3Z4V7C	Fairchild Semiconductor	4.7 V	±5%	200 mW	75 Ω	1 V @ 10 mA	-65 to 150°C	SOD-323F	Active
TDZ4V7J,115	Nexperia USA Inc.	4.7 V	±2%	500 mW	80 Ω	1.1 V @ 100 mA	-55 to 150°C	SOD-323F	Active
BZX84J-C4V7,115	Nexperia USA Inc.	4.7 V	±5%	550 mW	80 Ω	1.1 V @ 100 mA	-65 to 150°C	SOD-323F	Active
BZX84J-B4V7,115	Nexperia USA Inc.	4.7 V	±2%	550 mW	80 Ω	1.1 V @ 100 mA	-65 to 150°C	SOD-323F	Active
PZU4.7B2,115	Nexperia USA Inc.	4.7 V	±2%	310 mW	80 Ω	1.1 V @ 100 mA	-65 to 150°C	SOD-323F	Active
DDZ4V7BSF-7	Diodes Incorporated	4.68 V	±3%	500 mW	130 Ω	900 mV @ 10 mA	-65 to 150°C	SOD-323F	Discontinued

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

MMSZ5230BS-7-F (Diodes Incorporated) is the direct functional equivalent to MMXZ5230B-TP. Both parts maintain identical zener voltage (4.7 V), tolerance (±5%), and power rating (200 mW). The MMSZ5230BS-7-F extends the operating temperature range to -65°C and provides improved forward voltage characteristics. This part is Active with high inventory availability (36,805 units) and maintains full ROHS3 compliance and MSL-1 rating.

Upgraded Substitutes (Enhanced Performance):

TDZ4V7J,115 (Nexperia USA Inc.) provides 500 mW power dissipation with ±2% tolerance and AEC-Q101 automotive qualification. This part is suitable for applications requiring additional thermal margin or stricter voltage tolerance. Operating temperature range matches the original specification (-55 to 150°C).

BZX84J-C4V7,115 (Nexperia USA Inc.) offers 550 mW power dissipation with ±5% tolerance and AEC-Q101 automotive qualification. Extended temperature range (-65 to 150°C) and higher power rating provide design flexibility for demanding applications.

BZX84J-B4V7,115 (Nexperia USA Inc.) combines 550 mW power dissipation with ±2% tolerance and AEC-Q101 automotive qualification, providing both enhanced performance and tighter voltage control.

Compatible Alternatives (Equivalent Performance):

MM3Z4V7B (onsemi) and MM3Z4V7C (Fairchild Semiconductor) maintain 200 mW power rating with SOD-323F packaging. MM3Z4V7B offers ±2% tolerance; MM3Z4V7C matches the original ±5% tolerance. Both extend operating temperature to -65°C.

PZU4.7B2,115 (Nexperia USA Inc.) provides 310 mW power dissipation with ±2% tolerance and AEC-Q100 automotive qualification, offering intermediate power capability.

Discontinued Part:

DDZ4V7BSF-7 (Diodes Incorporated) is marked as Discontinued at DiGi Electronics and should not be selected for new designs despite meeting electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5230BS-7-F directly replace MMXZ5230B-TP without PCB modification?

A: Yes. Both parts share identical electrical specifications (4.7 V, ±5%, 200 mW) and SOD-323 package footprints. No circuit modification is required. The MMSZ5230BS-7-F is a direct functional equivalent.

Q: What is the difference between SOD-323 and SOD-323F packages?

A: SOD-323F is a variant of the SOD-323 package with enhanced thermal characteristics. SOD-323F packages are mechanically compatible with SOD-323 footprints on PCBs. Parts specified in SOD-323F can be used in SOD-323 applications without footprint redesign.

Q: Why would I select an upgraded substitute like TDZ4V7J,115 instead of the direct equivalent?

A: Upgraded substitutes provide additional design margin through higher power ratings (500 mW vs. 200 mW) and tighter voltage tolerance (±2% vs. ±5%). These characteristics improve circuit reliability in voltage regulation and protection applications subject to thermal stress or requiring precise voltage control.

Q: Are the Nexperia automotive-qualified parts (AEC-Q101) suitable for non-automotive applications?

A: Yes. Automotive-qualified parts meet or exceed the electrical and reliability requirements of non-automotive applications. AEC-Q101 qualification indicates enhanced testing and quality assurance. These parts are suitable for any application requiring the specified electrical characteristics.

Q: What is the significance of the ±2% tolerance in MM3Z4V7B compared to the ±5% tolerance in MMXZ5230B-TP?

A: Tighter tolerance (±2%) ensures the zener voltage remains closer to the nominal 4.7 V across the specified operating range. This is beneficial in precision voltage reference and regulation circuits where voltage accuracy directly affects circuit performance. Applications with less stringent voltage requirements can use ±5% tolerance parts.

Q: Can I use BZX84J-C4V7,115 (550 mW) in place of MMXZ5230B-TP (200 mW)?

A: Yes. The 550 mW part is rated for higher power dissipation and will function correctly in circuits designed for 200 mW zener diodes. The higher power rating provides additional thermal margin but does not affect voltage regulation performance. This substitution is valid for all applications meeting the 4.7 V, ±5% specification.

Q: What inventory considerations should guide part selection?

A: MMSZ5230BS-7-F (36,805 units), TDZ4V7J,115 (100,100 units), and BZX84J-C4V7,115 (23,623 units) maintain substantial inventory levels. MM3Z4V7B (65,862 units) offers the highest availability. DDZ4V7BSF-7 is discontinued and should be avoided for new designs.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All active substitute parts listed maintain ROHS3 compliance and MSL-1 (Unlimited) moisture sensitivity rating, matching the environmental and regulatory status of MMXZ5230B-TP.

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