MMSZ5259BS-7-F Equivalent & Substitute Parts

Part Overview

The MMSZ5259BS-7-F is a 39 V, 200 mW Zener diode manufactured by Diodes Incorporated in SOD-323 surface mount package. This component is classified as Active and is ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and operational parameters. Alternative components may be required due to inventory availability, lead time considerations, or specific application requirements within the allowable parameter tolerances.

Substiute Parts

MMSZ5259BS-7-F

Diodes IncorporatedIn Stock: 17360MMSZ5259BS-7-F Datasheet

Current PartRFQ

BZT52C39S-7-F

Diodes IncorporatedIn Stock: 167115BZT52C39S-7-F Datasheet

DirectRFQ

BZT52C39S-TP

Micro Commercial CoIn Stock: 3874BZT52C39S-TP Datasheet

DirectRFQ

MM3Z39VT1G

onsemiIn Stock: 44419MM3Z39VT1G Datasheet

DirectRFQ

MMXZ5259B-TP

Micro Commercial CoIn Stock: 3654MMXZ5259B-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of Zener diodes is determined by the following critical parameters:

Primary Matching Criteria:

• Voltage - Zener (Nominal): 39 V
• Tolerance: ±5%
• Package / Case: SOD-323
• Mounting Type: Surface Mount
• Operating Temperature Range: -65°C to 150°C minimum

Secondary Compatibility Criteria:

• Power - Maximum: 200 mW or greater
• Impedance (Maximum): 80 Ohms or lower (lower impedance is acceptable)
• Current - Reverse Leakage: 100 nA or lower
• Voltage - Forward (Maximum): 900 mV @ 10 mA or lower
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Parts meeting all primary criteria and maintaining secondary parameter specifications within acceptable ranges are classified as direct substitutes. The MMSZ5259BS-7-F has four identified equivalent parts that satisfy these requirements across different manufacturers and packaging options.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and ROHS3 compliance, meeting regulatory requirements for current applications.

BZT52C39S-7-F (Diodes Incorporated): Direct substitute with identical nominal specifications. Impedance specification of 130 Ohms exceeds the primary part's 80 Ohms maximum, remaining within acceptable circuit tolerance ranges for most applications. Reverse leakage measurement taken at 27.3 V instead of 30 V represents a minor specification variation. Inventory availability of 167,100 units provides supply security.

BZT52C39S-TP (Micro Commercial Co): Functionally equivalent to BZT52C39S-7-F with identical electrical parameters. Manufacturer change from Diodes Incorporated to Micro Commercial Co may require design verification in applications with strict supplier qualification requirements. Tape & Reel packaging maintains surface mount compatibility.

MM3Z39VT1G (onsemi): Rated for 300 mW maximum power, exceeding the primary part's 200 mW specification. This higher power rating provides additional thermal margin in applications approaching maximum dissipation limits. Reverse leakage of 50 nA at 27.3 V is superior to the primary part's 100 nA specification. Impedance of 130 Ohms matches BZT52 series specifications. Cut Tape & Digi-Reel packaging differs from standard Tape & Reel format.

MMXZ5259B-TP (Micro Commercial Co): Manufacturer-recommended substitute with matching impedance (80 Ohms) and reverse leakage specifications (100 nA @ 30 V) to the primary part. Operating temperature minimum of -55°C is 10°C higher than the primary part's -65°C specification, restricting use in extreme low-temperature applications. Forward voltage specification of 1.2 V @ 100 mA differs from the primary part's 900 mV @ 10 mA measurement condition.

Frequently Asked Questions (FAQ)

Q: Can BZT52C39S-7-F replace MMSZ5259BS-7-F in all applications?

A: BZT52C39S-7-F meets all primary electrical specifications and package requirements. The impedance difference (130 Ohms vs. 80 Ohms) is within acceptable circuit tolerance ranges for standard Zener diode applications. Verification is required only for circuits with impedance-sensitive specifications.

Q: What is the difference between MM3Z39VT1G and the primary part?

A: MM3Z39VT1G is rated for 300 mW maximum power versus 200 mW for MMSZ5259BS-7-F. All other electrical parameters match. The higher power rating provides additional thermal headroom. Packaging format differs (Cut Tape & Digi-Reel vs. Tape & Reel).

Q: Is MMXZ5259B-TP suitable for low-temperature applications?

A: MMXZ5259B-TP operates from -55°C to 150°C, compared to the primary part's -65°C to 150°C range. Applications requiring operation below -55°C must use the primary part or alternative substitutes with matching temperature specifications.

Q: Do all substitute parts have the same package dimensions?

A: All substitute parts use SOD-323 package (SC-76 case). Physical dimensions and land pattern compatibility are identical. Packaging format (Tape & Reel vs. Cut Tape & Digi-Reel) affects handling and storage but not circuit performance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts carry ROHS3 compliance certification and Moisture Sensitivity Level 1 (Unlimited), matching the primary part's regulatory status.

Q: Which substitute offers the lowest reverse leakage current?

A: MM3Z39VT1G specifies 50 nA reverse leakage at 27.3 V, compared to 100 nA for the primary part and most other substitutes. This lower leakage may be advantageous in precision analog circuits.

Q: Can substitutes be mixed within a single design?

A: All substitutes meet the same nominal specifications and package requirements. Mixed usage is permissible provided circuit design does not depend on impedance or leakage current variations between individual parts.