MMXZ5232B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The MMXZ5232B-TP is a 5.6 V, 200 mW surface mount zener diode manufactured by Micro Commercial Co in SOD-323 packaging. This component is classified as an active product with ROHS3 compliance and unlimited moisture sensitivity rating. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage applications in electronic circuits. Equivalent and substitute parts are identified based on matching or exceeding the electrical and mechanical parameters of the original component, enabling design flexibility and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	5.6	V
Tolerance	±5%	-
Power - Max	200	mW
Impedance (Max)	11	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 3 V
Voltage - Forward (Max) @ 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

Substitute parts for the MMXZ5232B-TP are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalents (Identical Specifications): Parts that match the nominal zener voltage (5.6 V), tolerance (±5%), maximum power dissipation (200 mW), and surface mount packaging (SOD-323 or SOD-323F). These parts are interchangeable in applications where the original specifications are required.

Higher-Rated Alternatives (Enhanced Specifications): Parts that exceed the power rating, improve tolerance, or provide extended operating temperature ranges while maintaining the 5.6 V nominal zener voltage. These parts are suitable for applications requiring improved thermal performance or tighter voltage regulation.

Key Parameters for Substitution Compatibility:

Voltage - Zener (Nom): Must be 5.6 V
Mounting Type: Must be Surface Mount
Package / Case: SOD-323, SOD-323F, or SC-76/SC-90 variants
Operating Temperature Range: Must encompass or exceed -55°C to 150°C
RoHS Status: Must be ROHS3 Compliant

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Zener (Nom)	Tolerance	Power - Max	Impedance (Max)	Operating Temp Range	Package / Case	Product Status
MMXZ5232B-TP	Micro Commercial Co	5.6 V	±5%	200 mW	11 Ohms	-55 to 150°C	SC-76, SOD-323	Active
MMSZ5232BS-7-F	Diodes Incorporated	5.6 V	±5%	200 mW	11 Ohms	-65 to 150°C	SC-76, SOD-323	Active
DDZ9690S-7	Diodes Incorporated	5.6 V	±5%	200 mW	-	-65 to 150°C	SC-76, SOD-323	Active
MM3Z5V6B	onsemi	5.6 V	±2%	200 mW	37 Ohms	-65 to 150°C	SC-90, SOD-323F	Active
MM3Z5V6C	Fairchild Semiconductor	5.6 V	±5%	200 mW	37 Ohms	-65 to 150°C	SC-90, SOD-323F	Active
BZX84J-B5V6,115	Nexperia USA Inc.	5.6 V	±2%	550 mW	40 Ohms	-65 to 150°C	SC-90, SOD-323F	Active
BZX84J-C5V6,115	Nexperia USA Inc.	5.6 V	±5%	550 mW	40 Ohms	-65 to 150°C	SC-90, SOD-323F	Active
D3Z5V6BF-7	Diodes Incorporated	5.61 V	±2%	400 mW	50 Ohms	-65 to 150°C	SC-90, SOD-323F	Active
DDZ5V6BSF-7	Diodes Incorporated	5.6 V	±2.5%	500 mW	80 Ohms	-65 to 150°C	SC-90, SOD-323F	Active
PZU5.6B,115	Nexperia USA Inc.	5.6 V	±5%	310 mW	40 Ohms	-65 to 150°C	SC-90, SOD-323F	Active
TDZ5V6J,115	NXP Semiconductors	5.6 V	±2%	500 mW	40 Ohms	-55 to 150°C	SC-90, SOD-323F	Active

Engineering Selection Recommendations

Direct Replacement (Identical Electrical and Thermal Specifications):

MMSZ5232BS-7-F (Diodes Incorporated) is the primary direct equivalent to MMXZ5232B-TP. Both components share identical nominal zener voltage (5.6 V), tolerance (±5%), and maximum power dissipation (200 mW). The MMSZ5232BS-7-F extends the lower operating temperature limit to -65°C, providing enhanced cold-temperature performance. Both components are ROHS3 compliant with unlimited moisture sensitivity rating and active product status.

DDZ9690S-7 (Diodes Incorporated) is an alternative direct equivalent with matching electrical specifications (5.6 V, ±5%, 200 mW) and extended operating temperature range (-65 to 150°C). This part is suitable for applications requiring identical performance with improved low-temperature operation.

Tighter Tolerance Alternatives (±2% Tolerance):

MM3Z5V6B (onsemi) and BZX84J-B5V6,115 (Nexperia USA Inc.) provide improved voltage tolerance (±2%) while maintaining 5.6 V nominal zener voltage. MM3Z5V6B is rated at 200 mW, matching the original power specification. BZX84J-B5V6,115 is rated at 550 mW, providing enhanced thermal margin. Both are ROHS3 compliant and active products. BZX84J-B5V6,115 carries AEC-Q101 automotive qualification.

Higher Power Rating Alternatives (Enhanced Thermal Performance):

BZX84J-C5V6,115 (Nexperia USA Inc.), DDZ5V6BSF-7 (Diodes Incorporated), and TDZ5V6J,115 (NXP Semiconductors) are rated at 500-550 mW, providing 2.5 to 2.75 times the power dissipation of the original component. These parts are suitable for applications requiring improved thermal performance or higher current handling. All three are ROHS3 compliant and active products. BZX84J-C5V6,115 and TDZ5V6J,115 carry automotive qualifications (AEC-Q101).

Package Compatibility Considerations:

The original MMXZ5232B-TP uses SOD-323 packaging (SC-76). Most substitute parts use SOD-323F packaging (SC-90), which is physically larger. PCB layout modifications may be required for parts using SOD-323F. MMSZ5232BS-7-F and DDZ9690S-7 maintain SOD-323 packaging, eliminating layout concerns.

Frequently Asked Questions (FAQ)

Q: Can I substitute MMXZ5232B-TP with a part rated at higher power dissipation?

A: Yes. Parts rated at 310 mW, 400 mW, 500 mW, or 550 mW (such as PZU5.6B,115, D3Z5V6BF-7, DDZ5V6BSF-7, or BZX84J-C5V6,115) are electrically compatible. Higher power ratings provide improved thermal performance and do not degrade circuit function. However, verify that PCB thermal design and component placement accommodate the potentially larger package size (SOD-323F vs. SOD-323).

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

A: SOD-323 (SC-76) and SOD-323F (SC-90) are both surface mount diode packages with identical electrical performance. SOD-323F is physically larger, providing improved thermal dissipation. Parts using SOD-323F may require PCB layout modifications if the original design was optimized for SOD-323 footprint.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant and carry unlimited moisture sensitivity rating (MSL 1), matching the environmental compliance of the original MMXZ5232B-TP.

Q: Which substitute part has the tightest voltage tolerance?

A: MM3Z5V6B, BZX84J-B5V6,115, D3Z5V6BF-7, and TDZ5V6J,115 all provide ±2% tolerance, compared to the original ±5% tolerance. This tighter tolerance improves voltage regulation accuracy in precision applications.

Q: Can I use a substitute part with a different nominal zener voltage?

A: No. All substitute parts must maintain the 5.6 V nominal zener voltage to ensure circuit compatibility. D3Z5V6BF-7 is rated at 5.61 V, which is within the ±5% tolerance band of the original specification and is functionally equivalent.

Q: Which substitute parts are automotive qualified?

A: BZX84J-B5V6,115, BZX84J-C5V6,115, PZU5.6B,115, and TDZ5V6J,115 carry automotive qualifications (AEC-Q100 or AEC-Q101). These parts are suitable for automotive and high-reliability applications.

Q: What is the impact of impedance differences between substitute parts?

A: Impedance (Zzt) affects the dynamic response of the zener diode under transient conditions. The original MMXZ5232B-TP has 11 Ohms impedance. Substitute parts range from 11 to 80 Ohms. Higher impedance values result in slower transient response but do not affect steady-state voltage regulation. Select based on application transient requirements.

Q: Are there any substitute parts with extended lower operating temperature limits?

A: Yes. MMSZ5232BS-7-F, DDZ9690S-7, MM3Z5V6B, MM3Z5V6C, BZX84J-B5V6,115, BZX84J-C5V6,115, D3Z5V6BF-7, DDZ5V6BSF-7, and PZU5.6B,115 all operate down to -65°C, compared to the original -55°C lower limit. This extended range is beneficial for applications in extreme cold environments.

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