MMXZ5258B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The MMXZ5258B-TP is a 36 V, 200 mW surface mount zener diode manufactured by Micro Commercial Co in SOD-323 packaging. This component is classified as Active product status and is ROHS3 compliant. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference circuits. Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific requirements such as enhanced power dissipation, improved temperature range, or alternative packaging formats.

Substiute Parts

MMXZ5258B-TP

Micro Commercial CoIn Stock: 3741MMXZ5258B-TP Datasheet

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MMSZ5258BS-7-F

Diodes IncorporatedIn Stock: 4019MMSZ5258BS-7-F Datasheet

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BZX84J-B36,115

Nexperia USA Inc.In Stock: 16499BZX84J-B36,115 Datasheet

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BZX84J-C36,115

Nexperia USA Inc.In Stock: 3080BZX84J-C36,115 Datasheet

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DDZ9715S-7

Diodes IncorporatedIn Stock: 805DDZ9715S-7 Datasheet

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MM3Z36VB

Fairchild SemiconductorIn Stock: 3171MM3Z36VB Datasheet

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MM3Z36VC

Fairchild SemiconductorIn Stock: 25193MM3Z36VC Datasheet

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PZU36B,115

Nexperia USA Inc.In Stock: 12187PZU36B,115 Datasheet

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PZU36BA,115

Nexperia USA Inc.In Stock: 4347PZU36BA,115 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MMXZ5258B-TP is determined by the following critical parameters:

Primary Substitution Criteria:

• Voltage - Zener (Nom): 36 V (exact match required)
• Tolerance: ±5% or tighter (±2% acceptable)
• Power - Max: 200 mW or greater
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Secondary Compatibility Factors:

• Operating Temperature Range: -55°C to 150°C minimum
• Package / Case: SOD-323, SOD-323F, or SOD-123 (all surface mount variants)
• Impedance (Max): 70 Ohms or lower preferred
• Current - Reverse Leakage: 100 nA @ 27 V or lower

Substitute parts are grouped into two categories:

Direct Equivalents: Parts with identical zener voltage (36 V), tolerance (±5%), power rating (200 mW), and SOD-323 packaging. These provide pin-for-pin and functional compatibility with no circuit modifications required.

Functional Substitutes: Parts with identical zener voltage (36 V) and tolerance (±5% or better), but with enhanced power dissipation (310 mW or greater) or alternative surface mount packages (SOD-323F, SOD-123). These are suitable when higher power handling or different package footprints are acceptable within the application design.

Parameter Comparison

Engineering Selection Recommendations

Direct Pin-for-Pin Replacement (SOD-323 Package):

DDZ9715S-7 (Diodes Incorporated) and PZU36BA,115 (Nexperia USA Inc.) are direct mechanical and electrical replacements for the MMXZ5258B-TP. Both maintain the SOD-323 package format, 36 V zener voltage, ±5% tolerance, and 200 mW power rating. DDZ9715S-7 extends the operating temperature range to -65°C, providing enhanced low-temperature performance. PZU36BA,115 offers increased power dissipation (320 mW) while maintaining the same package footprint and temperature range (-55°C to 150°C) as the original part. Both are ROHS3 compliant and Active product status.

Enhanced Power Dissipation (SOD-323F Package):

BZX84J-C36,115 (Nexperia USA Inc.) and PZU36B,115 (Nexperia USA Inc.) provide 550 mW and 310 mW power ratings respectively, compared to the original 200 mW specification. Both use the SOD-323F package variant and maintain 36 V zener voltage with ±5% tolerance. These parts are suitable for applications requiring higher thermal dissipation. BZX84J-C36,115 includes AEC-Q101 automotive qualification. Both operate across -65°C to 150°C and are ROHS3 compliant.

Alternative Package Format (SOD-123):

MMSZ5258BS-7-F (Diodes Incorporated) provides electrical equivalence with identical 36 V, ±5%, 200 mW specifications but in SOD-123 package format. This part extends the operating temperature range to -65°C and is ROHS3 compliant. Selection of this part requires PCB layout modification to accommodate the different package footprint.

Tighter Tolerance Option (±2%):

BZX84J-B36,115 (Nexperia USA Inc.) and MM3Z36VB (Fairchild Semiconductor) both offer ±2% tolerance compared to the original ±5%. BZX84J-B36,115 provides 550 mW power rating in SOD-323F package with AEC-Q101 automotive qualification. MM3Z36VB maintains 200 mW in SOD-323F package. Both operate across -65°C to 150°C. BZX84J-B36,115 is ROHS3 compliant; MM3Z36VB RoHS status is not specified in provided data.

Functional Equivalent (±5% Tolerance, SOD-323F):

MM3Z36VC (Fairchild Semiconductor) matches the original part's 36 V, ±5%, 200 mW specifications in SOD-323F package. This part operates across -65°C to 150°C. RoHS status is not specified in provided data.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5258BS-7-F replace MMXZ5258B-TP directly on the PCB?

A: MMSZ5258BS-7-F provides electrical equivalence (36 V, ±5%, 200 mW) but uses SOD-123 package instead of SOD-323. PCB layout modification is required. The SOD-123 package has a different footprint and pin configuration than SOD-323. Verify PCB pad layout compatibility before substitution.

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

A: SOD-323 and SOD-323F are both surface mount packages for small signal diodes. SOD-323F is a variant designation used by some manufacturers. Both are mechanically and electrically compatible in most applications. Verify specific package dimensions in manufacturer datasheets if PCB layout tolerances are critical.

Q: Can I use BZX84J-B36,115 (550 mW) instead of MMXZ5258B-TP (200 mW)?

A: Yes. BZX84J-B36,115 maintains the same 36 V zener voltage and ±5% tolerance but provides enhanced power dissipation (550 mW versus 200 mW). This substitution is suitable when higher thermal performance is required. The part uses SOD-323F package, requiring PCB layout verification. BZX84J-B36,115 includes AEC-Q101 automotive qualification and operates across -65°C to 150°C.

Q: What is the significance of ±2% tolerance versus ±5% tolerance?

A: Tolerance specifies the allowable deviation of the zener voltage from the nominal 36 V specification. ±2% tolerance (BZX84J-B36,115, MM3Z36VB) provides tighter voltage regulation (35.28 V to 36.72 V) compared to ±5% tolerance (34.2 V to 37.8 V). Select ±2% tolerance parts when precision voltage regulation is required. ±5% tolerance parts are suitable for general-purpose applications.

Q: Are all substitute parts ROHS3 compliant?

A: ROHS3 compliance is confirmed for MMSZ5258BS-7-F, BZX84J-B36,115, BZX84J-C36,115, DDZ9715S-7, PZU36B,115, and PZU36BA,115. MM3Z36VB and MM3Z36VC do not have RoHS status specified in provided data. Verify RoHS compliance with the manufacturer if regulatory compliance is required for your application.

Q: What is the operating temperature range difference between parts?

A: MMXZ5258B-TP operates from -55°C to 150°C. Most substitute parts extend the low-temperature limit to -65°C, providing enhanced cold-weather performance. PZU36BA,115 maintains the same -55°C to 150°C range as the original part. Select parts based on your application's thermal environment requirements.

Q: Can I substitute MM3Z36VC for MMXZ5258B-TP?

A: MM3Z36VC provides electrical equivalence (36 V, ±5%, 200 mW) but uses SOD-323F package instead of SOD-323. PCB layout modification is required. MM3Z36VC operates across -65°C to 150°C, extending the low-temperature range. RoHS status is not specified in provided data. Verify package compatibility and regulatory compliance before substitution.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is an automotive industry qualification standard for discrete semiconductors. BZX84J-B36,115 and BZX84J-C36,115 carry this qualification, indicating suitability for automotive applications with enhanced reliability and quality assurance. Select AEC-Q101 qualified parts for automotive or mission-critical applications.