MMSZ4712-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The MMSZ4712-TP is a 28 V, 500 mW Zener diode manufactured by Micro Commercial Co in SOD-123 surface mount packaging. This component is classified as Active and is in current production. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, inventory availability, or specific performance characteristics that align with the original specification parameters.

Substiute Parts

MMSZ4712-TP

Micro Commercial CoIn Stock: 985MMSZ4712-TP Datasheet

Current PartRFQ

MMSZ5255B-7-F

Diodes IncorporatedIn Stock: 8994MMSZ5255B-7-F Datasheet

DirectRFQ

MMSZ5255BS-7-F

Diodes IncorporatedIn Stock: 26164MMSZ5255BS-7-F Datasheet

SimilarRFQ

MMSZ5255C-E3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 14917MMSZ5255C-E3-08 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MMSZ4712-TP are classified based on electrical and mechanical compatibility within the Zener diode category. Substitution is valid when the following parameters align with the original specification:

Primary Substitution Criteria:

• Zener voltage: 28 V nominal
• Power dissipation: 500 mW maximum
• Tolerance: ±5% or tighter
• Package: SOD-123 surface mount
• Mounting type: Surface mount
• Operating temperature range: Minimum -55°C to 150°C
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

Direct Equivalents (Full Parameter Match): Parts meeting all primary criteria with identical electrical performance characteristics are classified as direct equivalents.

Similar Substitutes (Reduced Power Rating): Parts with identical voltage and tolerance specifications but reduced power dissipation (200 mW versus 500 mW) are classified as similar substitutes. These parts are suitable for applications where the full 500 mW power rating is not required.

Parameter Comparison

Engineering Selection Recommendations

MMSZ5255B-7-F (Diodes Incorporated) is a direct electrical equivalent to the MMSZ4712-TP. Both components share identical nominal Zener voltage (28 V), power rating (500 mW), tolerance (±5%), and SOD-123 packaging. This part is ROHS3 Compliant and REACH Unaffected. The extended operating temperature range (-65°C to 150°C) provides additional thermal margin compared to the original specification. This substitute is suitable for direct replacement in applications requiring full 500 mW power dissipation capability.

MMSZ5255C-E3-08 (Vishay General Semiconductor - Diodes Division) is an electrical equivalent with tighter voltage tolerance (±2% versus ±5%). Both components maintain 28 V nominal Zener voltage, 500 mW power rating, and SOD-123 packaging. This part is ROHS3 Compliant and REACH Unaffected. The improved tolerance specification may be beneficial in precision voltage regulation applications. Operating temperature range matches the original specification (-55°C to 150°C).

MMSZ5255BS-7-F (Diodes Incorporated) is a similar substitute with reduced power dissipation (200 mW versus 500 mW). This component maintains 28 V nominal Zener voltage and ±5% tolerance but is packaged in SOD-323 (SC-76) instead of SOD-123. This substitute is applicable only in applications where the reduced power rating is acceptable and where PCB layout accommodates the different package footprint. Extended operating temperature range (-65°C to 150°C) is provided. ROHS3 Compliant and REACH Unaffected.

All substitute parts carry Active product status and current production availability.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5255B-7-F replace MMSZ4712-TP in all applications?

A: Yes. MMSZ5255B-7-F is a direct electrical equivalent with identical Zener voltage (28 V), power rating (500 mW), tolerance (±5%), and SOD-123 packaging. Both components meet ROHS3 and REACH compliance requirements. The extended operating temperature range of MMSZ5255B-7-F (-65°C to 150°C) provides additional thermal margin.

Q: What is the difference between MMSZ5255B-7-F and MMSZ5255BS-7-F?

A: The primary difference is power dissipation and package type. MMSZ5255B-7-F is rated for 500 mW in SOD-123 packaging, while MMSZ5255BS-7-F is rated for 200 mW in SOD-323 packaging. Both maintain 28 V nominal Zener voltage and ±5% tolerance. MMSZ5255BS-7-F is suitable only for applications where 200 mW power dissipation is sufficient and where the SOD-323 package footprint is compatible with the PCB design.

Q: Why does MMSZ5255C-E3-08 have a ±2% tolerance instead of ±5%?

A: MMSZ5255C-E3-08 is manufactured by Vishay with tighter voltage tolerance specifications. The ±2% tolerance provides improved voltage regulation accuracy compared to the ±5% specification of the original MMSZ4712-TP. This characteristic may be advantageous in precision voltage reference applications.

Q: Are all substitute parts available in the same package?

A: MMSZ5255B-7-F and MMSZ5255C-E3-08 are both available in SOD-123 packaging, matching the original MMSZ4712-TP. MMSZ5255BS-7-F is available in SOD-323 (SC-76) packaging, which requires different PCB footprint and layout considerations.

Q: Do all substitute parts meet the same compliance standards as the original?

A: Yes. All substitute parts listed are ROHS3 Compliant and REACH Unaffected, matching the regulatory compliance status of the MMSZ4712-TP.

Q: What is the reverse leakage current difference between the main part and substitutes?

A: MMSZ4712-TP specifies 10 nA reverse leakage at 21.2 V. All three substitute parts specify 100 nA reverse leakage at 21 V. This difference may be relevant in low-current or high-impedance circuit applications.

Q: Can MMSZ5255BS-7-F be used in place of MMSZ4712-TP if the application only requires 200 mW?

A: MMSZ5255BS-7-F is suitable only if the application power dissipation requirement does not exceed 200 mW and if the SOD-323 package footprint is compatible with the PCB design. The reduced power rating makes this part unsuitable for applications requiring the full 500 mW capability.