MMXZ5250B-TP Zener Diode 20V 200mW Equivalent & Substitute Parts

Part Overview

The MMXZ5250B-TP is a 20V, 200mW Zener diode manufactured by Micro Commercial Co, supplied in Tape & Reel packaging with SOD-323 surface mount configuration. This component is classified as Active product status and is RoHS3 compliant. Equivalent and substitute parts are identified based on matching or exceeding the electrical specifications and mechanical compatibility requirements of the original part. Alternative components may be required due to supply chain availability, manufacturing discontinuation, or design optimization for specific application requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	20	V
Power - Maximum	200	mW
Tolerance	±5%	-
Impedance (Maximum)	25	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 15V
Voltage - Forward (Maximum) @ If	1.2	V @ 100mA
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount	-
Package / Case	SOD-323	-
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the MMXZ5250B-TP are classified into two categories based on electrical and mechanical compatibility:

Direct Substitutes (Electrical Equivalents): Parts that maintain the same nominal Zener voltage (20V), maximum power rating (200mW), and tolerance specification (±5%), with compatible surface mount packaging. These parts are interchangeable in applications where the original specifications are required.

Functional Equivalents (Enhanced Specifications): Parts that exceed the original specifications in power rating, tolerance accuracy, or impedance characteristics while maintaining the 20V Zener voltage and surface mount configuration. These parts provide enhanced performance margins and may be used where improved specifications are beneficial.

Critical Substitution Parameters:

Voltage - Zener (Nominal): 20V (exact match required)
Power - Maximum: 200mW minimum (equal or greater acceptable)
Mounting Type: Surface Mount (required)
Operating Temperature Range: Must encompass or exceed -55°C to 150°C
RoHS Status: ROHS3 Compliant (required)
Moisture Sensitivity Level: 1 (Unlimited) preferred

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (Nom)	Power (Max)	Tolerance	Zzt (Max)	Package	Temp Range	RoHS
MMXZ5250B-TP	Micro Commercial Co	20V	200mW	±5%	25Ω	SOD-323	-55 to 150°C	ROHS3
MMSZ5250BS-7-F	Diodes Incorporated	20V	200mW	±5%	25Ω	SOD-123	-65 to 150°C	ROHS3
BZX84J-B20,115	NXP Semiconductors	20V	550mW	±2%	20Ω	SOD-323F	-65 to 150°C	-
BZX84J-C20,115	Nexperia USA Inc.	20V	550mW	±5%	20Ω	SOD-323F	-65 to 150°C	ROHS3
DDZ9707S-7	Diodes Incorporated	20V	200mW	±5%	-	SOD-323	-65 to 150°C	ROHS3
MM3Z20VB	onsemi	20V	200mW	±2%	51Ω	SOD-323F	-65 to 150°C	ROHS3
MM3Z20VC	Fairchild Semiconductor	20V	200mW	±5%	51Ω	SOD-323F	-65 to 150°C	-
MM3Z20VT1G	onsemi	20V	300mW	±6%	55Ω	SOD-323	-65 to 150°C	ROHS3
PZU20B2,115	NXP Semiconductors	20V	310mW	±2%	20Ω	SOD-323F	-65 to 150°C	-

Engineering Selection Recommendations

Direct Electrical Equivalents (Recommended Primary Substitutes):

DDZ9707S-7 (Diodes Incorporated) and MMSZ5250BS-7-F (Diodes Incorporated) are direct functional equivalents maintaining 20V nominal Zener voltage, 200mW maximum power rating, and ±5% tolerance specification. Both parts are RoHS3 compliant with MSL 1 (Unlimited) rating. DDZ9707S-7 retains the SOD-323 package matching the original MMXZ5250B-TP footprint. MMSZ5250BS-7-F uses SOD-123 package, requiring PCB layout modification but offering extended temperature range (-65°C to 150°C).

Enhanced Performance Alternatives:

BZX84J-C20,115 (Nexperia USA Inc.) provides 550mW power rating with ±5% tolerance, SOD-323F package, and RoHS3 compliance. This part offers superior power dissipation capability and improved impedance characteristics (20Ω vs. 25Ω) while maintaining voltage and tolerance specifications. Extended temperature range (-65°C to 150°C) provides additional operational margin.

MM3Z20VB (onsemi) delivers 200mW power rating with improved ±2% tolerance accuracy and RoHS3 compliance. SOD-323F package configuration requires footprint verification. Extended temperature range (-65°C to 150°C) supports broader application requirements.

Compliance Considerations:

All recommended substitutes maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. Parts designated with automotive qualification (BZX84J-B20,115, BZX84J-C20,115) meet AEC-Q101 standards for automotive applications. Selection should verify application-specific compliance requirements before implementation.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5250BS-7-F replace MMXZ5250B-TP directly on the PCB?

A: MMSZ5250BS-7-F maintains identical electrical specifications (20V, 200mW, ±5%) and RoHS3 compliance. However, the package differs: MMSZ5250BS-7-F uses SOD-123 while MMXZ5250B-TP uses SOD-323. PCB footprint modification is required. Electrical performance is equivalent.

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

A: SOD-323F is a variant of SOD-323 with modified lead configuration. Both are surface mount packages suitable for automated assembly. Physical dimensions differ slightly; PCB layout verification is necessary when switching between these packages.

Q: Can I use BZX84J-C20,115 as a substitute for higher power applications?

A: BZX84J-C20,115 provides 550mW maximum power rating compared to the original 200mW specification. This part is electrically compatible (20V nominal, ±5% tolerance, RoHS3 compliant) and suitable for applications requiring enhanced power dissipation. Package is SOD-323F; footprint compatibility must be verified.

Q: Are there temperature range differences between substitute parts?

A: The original MMXZ5250B-TP operates from -55°C to 150°C. Most substitute parts extend the lower temperature limit to -65°C, providing additional operational margin. This enhancement does not affect compatibility in applications within the original temperature range.

Q: Which substitute offers the best tolerance accuracy?

A: BZX84J-B20,115, MM3Z20VB, and PZU20B2,115 all provide ±2% tolerance compared to the original ±5%. Enhanced tolerance accuracy reduces voltage variation across production batches and improves circuit performance in precision applications.

Q: Is RoHS3 compliance mandatory for all substitutes?

A: RoHS3 compliance is specified for the original MMXZ5250B-TP. Recommended substitutes (DDZ9707S-7, MMSZ5250BS-7-F, BZX84J-C20,115, MM3Z20VB, MM3Z20VT1G) maintain RoHS3 compliance. Verify compliance requirements for your specific application before selecting alternatives.

Q: Can MM3Z20VT1G be used as a substitute despite higher power rating?

A: MM3Z20VT1G provides 300mW power rating (exceeding the 200mW specification) with 20V nominal voltage and RoHS3 compliance. The higher power rating does not prevent substitution; however, tolerance is ±6% compared to the original ±5%. Verify impedance characteristics (55Ω vs. 25Ω) for circuit-specific requirements.

Q: What packaging format should I specify for high-volume procurement?

A: The original MMXZ5250B-TP is supplied in Tape & Reel (TR) format. Substitute parts DDZ9707S-7, MMSZ5250BS-7-F, and MM3Z20VT1G are available in TR packaging, suitable for automated assembly. Verify packaging availability with suppliers for production quantities.

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