MMXZ5255B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The MMXZ5255B-TP is a 28 V, 200 mW Zener diode manufactured by Micro Commercial Co in SOD-323 surface mount packaging. This component is classified as an active product and is RoHS3 compliant. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference voltage applications in electronic circuits. Alternative equivalent parts may be required due to inventory availability, supply chain considerations, or design flexibility across manufacturing sources.

Substiute Parts

MMXZ5255B-TP

Micro Commercial CoIn Stock: 771MMXZ5255B-TP Datasheet

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MMSZ5255BS-7-F

Diodes IncorporatedIn Stock: 26164MMSZ5255BS-7-F Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the MMXZ5255B-TP is determined by equivalence across the following critical electrical and mechanical parameters:

Zener voltage specification (28 V nominal with ±5% tolerance), maximum power dissipation rating (200 mW), impedance characteristic (44 Ohms maximum), reverse leakage current specification (100 nA @ 21 V), and package form factor (SOD-323 surface mount). All substitute parts must maintain identical or superior operating temperature range, RoHS3 compliance status, and MSL rating. Forward voltage characteristics may vary within acceptable limits for the application category. Substitute parts are sourced from qualified manufacturers with active product status and equivalent regulatory certifications.

Parameter Comparison

Engineering Selection Recommendations

The MMSZ5255BS-7-F manufactured by Diodes Incorporated is a direct electrical and mechanical equivalent to the MMXZ5255B-TP. Both components meet identical zener voltage, power rating, impedance, and leakage current specifications. Both are RoHS3 compliant with MSL rating of 1 (Unlimited) and REACH unaffected status. The substitute part offers an extended lower operating temperature limit (-65°C versus -55°C), providing additional thermal margin in applications requiring operation at lower ambient temperatures. Both components are packaged in SOD-323 surface mount form factor and are suitable for direct board-level substitution. Selection between these parts may be based on inventory availability, supply chain lead times, or design qualification requirements specific to the end application.

Frequently Asked Questions (FAQ)

Q: Can the MMSZ5255BS-7-F be used as a direct replacement for the MMXZ5255B-TP in existing designs?

A: Yes. Both components share identical zener voltage (28 V), power rating (200 mW), impedance (44 Ohms), reverse leakage current (100 nA @ 21 V), and SOD-323 package specifications. Both are RoHS3 compliant with MSL 1 rating. Direct substitution is supported at the board assembly level without design modification.

Q: What is the difference in forward voltage characteristics between these parts?

A: The MMXZ5255B-TP specifies 1.2 V maximum forward voltage at 100 mA. The MMSZ5255BS-7-F specifies 900 mV maximum forward voltage at 10 mA. These measurements are taken at different current levels and do not affect zener diode operation in voltage regulation or protection applications where reverse bias operation is the primary function.

Q: Are there temperature range differences between these parts?

A: The MMXZ5255B-TP operates from -55°C to 150°C. The MMSZ5255BS-7-F operates from -65°C to 150°C. The substitute part provides a 10°C lower temperature limit, offering extended operational range for applications requiring operation in colder environments.

Q: Do both parts have the same moisture sensitivity rating?

A: Yes. Both the MMXZ5255B-TP and MMSZ5255BS-7-F carry MSL rating 1 (Unlimited), indicating no moisture sensitivity restrictions for storage, handling, or reflow processing.

Q: Are regulatory certifications equivalent between these parts?

A: Yes. Both components are RoHS3 compliant and REACH unaffected. Both carry EAR99 ECCN classification and identical HTSUS code (8541.10.0050), confirming equivalent regulatory status for procurement and export purposes.

Q: Can these parts be mixed in the same production batch?

A: Yes. Both components meet identical electrical specifications for zener voltage, power dissipation, impedance, and leakage current. Both are surface mount SOD-323 packages with equivalent MSL and RoHS compliance. Mixed sourcing is supported from a functional and regulatory standpoint.