MMXZ5225B-TP Zener Diode 3V 200mW SOD-323 Equivalent & Substitute Parts

Part Overview

The MMXZ5225B-TP is a surface mount zener diode manufactured by Micro Commercial Co, rated for 3 V nominal zener voltage and 200 mW maximum power dissipation in SOD-323 packaging. This component is classified as Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, inventory availability, or specific performance characteristics within the allowed electrical and mechanical parameter ranges for this zener diode category.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	3	V
Tolerance	±5%	-
Power - Max	200	mW
Impedance (Max)	29	Ohms
Current - Reverse Leakage @ Vr	50	µA @ 1 V
Voltage - Forward (Vf) (Max) @ If	1.2	V @ 100 mA
Operating Temperature	-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 MMXZ5225B-TP is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): 3 V (exact match required)
Power - Max: 200 mW or greater
Mounting Type: Surface Mount
Package / Case: SOD-323 or SOD-323F (compatible footprints)
Operating Temperature Range: Must encompass or exceed -55°C to 150°C
RoHS Status: ROHS3 Compliant

Secondary Compatibility Factors:

Tolerance: ±5% or tighter acceptable
Impedance (Max): Zzt values within circuit design margins
Current - Reverse Leakage @ Vr: 50 µA @ 1 V or lower
Voltage - Forward (Vf): 1.2 V @ 100 mA or lower

Substitute parts are grouped into two categories: direct equivalents (matching all primary criteria) and compatible alternatives (meeting primary criteria with variations in secondary parameters that do not compromise circuit function).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (Nom)	Tolerance	Power (Max)	Zzt (Max)	Ir @ Vr	Package	Temp Range	RoHS
MMXZ5225B-TP	Micro Commercial Co	3 V	±5%	200 mW	29 Ω	50 µA @ 1 V	SOD-323	-55 to 150°C	ROHS3
BZX384B3V0-E3-08	Vishay General Semiconductor	3 V	±2%	200 mW	95 Ω	10 µA @ 1 V	SOD-323	-55 to 150°C	ROHS3
BZX384B3V0-E3-18	Vishay General Semiconductor	3 V	±2%	200 mW	95 Ω	10 µA @ 1 V	SOD-323	-55 to 150°C	ROHS3
BZX384B3V0-G3-08	Vishay General Semiconductor	3 V	±2%	200 mW	95 Ω	10 µA @ 1 V	SOD-323	-55 to 150°C	ROHS3
BZX84J-B3V0,115	NXP USA Inc.	3 V	±2%	550 mW	95 Ω	10 µA @ 1 V	SOD-323F	-65 to 150°C	-
BZX84J-C3V0,115	Nexperia USA Inc.	3 V	±5%	550 mW	95 Ω	10 µA @ 1 V	SOD-323F	-65 to 150°C	ROHS3
CMDZ3V0 TR PBFREE	Central Semiconductor Corp	3 V	±5%	250 mW	95 Ω	5 µA @ 1 V	SOD-323	-65 to 175°C	ROHS3
CMDZ5225B TR PBFREE	Central Semiconductor Corp	3 V	±5%	250 mW	29 Ω	50 µA @ 1 V	SOD-323	-65 to 150°C	ROHS3
DDZ3V0ASF-7	Diodes Incorporated	2.96 V	±3.72%	500 mW	120 Ω	50 µA @ 1 V	SOD-323F	-65 to 150°C	ROHS3
MM3Z3V0B	Fairchild Semiconductor	3 V	±2%	200 mW	89 Ω	9 µA @ 1 V	SOD-323F	-65 to 150°C	-
MM3Z3V0C	onsemi	3 V	±5%	200 mW	89 Ω	9 µA @ 1 V	SOD-323F	-65 to 150°C	ROHS3

Engineering Selection Recommendations

Direct Equivalents (Preferred for Pin-Compatible Replacement):

The CMDZ5225B TR PBFREE from Central Semiconductor Corp is the closest functional equivalent to the MMXZ5225B-TP. Both parts share identical zener voltage (3 V), tolerance (±5%), impedance (29 Ω), and reverse leakage characteristics (50 µA @ 1 V). Both are ROHS3 compliant with MSL 1 rating. The CMDZ5225B offers 250 mW power rating versus 200 mW, providing additional thermal margin. Operating temperature range extends to -65°C lower bound compared to -55°C on the MMXZ5225B-TP.

Compatible Alternatives (Tighter Tolerance, Enhanced Performance):

The BZX384B3V0 series from Vishay General Semiconductor (variants E3-08, E3-18, and G3-08) provides ±2% tolerance versus ±5%, with identical 3 V zener voltage and 200 mW power rating. These parts feature higher impedance (95 Ω) and lower reverse leakage (10 µA @ 1 V), resulting in improved voltage regulation characteristics. All variants maintain SOD-323 packaging and ROHS3 compliance with identical operating temperature range (-55°C to 150°C).

Higher Power Alternatives (Extended Thermal Capability):

The BZX84J-C3V0,115 from Nexperia USA Inc. and BZX84J-B3V0,115 from NXP USA Inc. provide 550 mW power dissipation in SOD-323F package, supporting applications requiring greater thermal headroom. Both maintain 3 V zener voltage with ±2% to ±5% tolerance. Operating temperature extends to -65°C minimum. These parts are AEC-Q101 qualified for automotive applications. Package footprint differs (SOD-323F versus SOD-323), requiring PCB layout verification.

Extended Temperature Range Options:

The CMDZ3V0 TR PBFREE from Central Semiconductor Corp extends operating temperature to -65°C to 175°C, accommodating high-temperature environments. This part maintains 3 V zener voltage and ±5% tolerance with 250 mW power rating and ROHS3 compliance.

Selection Constraints:

Parts with SOD-323F package (BZX84J series, MM3Z3V0 series, DDZ3V0ASF-7) require PCB footprint compatibility verification before substitution. The DDZ3V0ASF-7 from Diodes Incorporated operates at 2.96 V nominal zener voltage, representing a 1.3% deviation from 3 V specification and is suitable only for applications tolerating this voltage shift.

Frequently Asked Questions (FAQ)

Q: Can I substitute the MMXZ5225B-TP with a part having higher power rating?

A: Yes. Parts rated for 250 mW, 500 mW, or 550 mW are electrically compatible substitutes provided all other parameters (3 V zener voltage, SOD-323 or SOD-323F package, surface mount, operating temperature range) are met. Higher power ratings provide additional thermal margin without affecting circuit function.

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

A: SOD-323 and SOD-323F are distinct package outlines with different PCB footprints. SOD-323 is the smaller variant; SOD-323F is larger. Direct substitution between these packages requires PCB layout modification. Verify footprint compatibility before component selection.

Q: Are all listed substitute parts ROHS3 compliant?

A: Most substitute parts listed are ROHS3 compliant. The BZX84J-B3V0,115 from NXP USA Inc. and MM3Z3V0B from Fairchild Semiconductor do not specify RoHS status in provided data. Verify RoHS compliance requirements for your application before selection.

Q: Can I use a part with ±2% tolerance instead of ±5%?

A: Yes. Tighter tolerance (±2%) is a compatible substitution for ±5% applications. The part will meet or exceed the original specification. The BZX384B3V0 series and MM3Z3B variants provide ±2% tolerance.

Q: What does impedance (Zzt) mean in zener diode selection?

A: Impedance (Zzt) represents the dynamic impedance of the zener diode in its reverse breakdown region. Lower impedance values provide better voltage regulation and lower output impedance. The MMXZ5225B-TP has 29 Ω impedance. Substitute parts with higher impedance (95 Ω, 89 Ω, 120 Ω) will exhibit slightly different voltage regulation characteristics but remain functionally compatible.

Q: Is reverse leakage current important for my application?

A: Reverse leakage current (Ir) affects standby power consumption and circuit performance in high-impedance applications. The MMXZ5225B-TP specifies 50 µA @ 1 V. Substitute parts with lower leakage (5 µA to 10 µA) reduce standby power consumption. Higher leakage values are acceptable for most general-purpose applications.

Q: Can I substitute with the DDZ3V0ASF-7 if my circuit requires exactly 3 V?

A: The DDZ3V0ASF-7 operates at 2.96 V nominal zener voltage, representing a 1.3% deviation from 3 V. This part is suitable only for applications with voltage tolerance specifications that accommodate this shift. Verify circuit requirements before selection.

Q: What is the significance of AEC-Q101 qualification?

A: AEC-Q101 qualification indicates the component meets automotive industry reliability and performance standards. The BZX84J series parts carry this qualification, making them suitable for automotive applications. Non-qualified parts are suitable for general industrial and consumer applications.

Q: Do all substitute parts support the same operating temperature range?

A: No. The MMXZ5225B-TP operates from -55°C to 150°C. Some substitutes extend to -65°C minimum (BZX84J series, CMDZ3V0, MM3Z3V0 series, DDZ3V0ASF-7) or 175°C maximum (CMDZ3V0). Verify operating temperature requirements for your application.

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