MMXZ5243B-TP Zener Diode Equivalent & Substitute Parts

Part Overview

The MMXZ5243B-TP is a 13 V, 200 mW surface mount zener diode manufactured by Micro Commercial Co in SOD-323 packaging. This component is classified as Active and is in full production status. The part is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1) and is suitable for voltage regulation and protection applications in electronic circuits.

Equivalent and substitute parts are identified based on matching electrical specifications including nominal zener voltage, power dissipation rating, forward voltage characteristics, and reverse leakage current parameters. Substitute parts enable design flexibility, support supply chain continuity, and provide alternative sourcing options when the primary part is unavailable.

Substiute Parts

MMXZ5243B-TP

Micro Commercial CoIn Stock: 954MMXZ5243B-TP Datasheet

Current PartRFQ

MMSZ5243BS-7-F

Diodes IncorporatedIn Stock: 8035MMSZ5243BS-7-F Datasheet

UpgradeRFQ

BZX84J-B13,115

Nexperia USA Inc.In Stock: 3949BZX84J-B13,115 Datasheet

SimilarRFQ

DDZ9700S-7

Diodes IncorporatedIn Stock: 3393DDZ9700S-7 Datasheet

SimilarRFQ

MM3Z13VB

onsemiIn Stock: 17579MM3Z13VB Datasheet

SimilarRFQ

MM3Z13VC

onsemiIn Stock: 1248MM3Z13VC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MMXZ5243B-TP are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalents (Upgrade Category): Parts that match all critical electrical parameters and are suitable for direct replacement without circuit modification. These parts maintain the 13 V nominal zener voltage, 200 mW power rating, ±5% tolerance, and SOD-323 package form factor.

Similar Substitutes (Alternative Category): Parts that maintain the 13 V nominal zener voltage and 200 mW power rating but may differ in secondary parameters such as impedance, tolerance grade, temperature range, or package variant (SOD-323F). These parts are electrically compatible for the primary voltage regulation function but require verification of application-specific requirements.

Key Parameters for Substitution Compatibility:

• Nominal Zener Voltage: 13 V (mandatory match)
• Power Dissipation: 200 mW (mandatory match)
• Mounting Type: Surface Mount (mandatory match)
• Package Category: SOD-323 or SOD-323F (compatible variants)
• Operating Temperature Range: Minimum -55°C to 150°C (substitute must meet or exceed)
• RoHS Compliance: ROHS3 (mandatory match)

Parameter Comparison

Engineering Selection Recommendations

MMSZ5243BS-7-F (Diodes Incorporated) is classified as a direct upgrade equivalent. This part matches all critical electrical specifications of the MMXZ5243B-TP including 13 V nominal voltage, 200 mW power rating, ±5% tolerance, and SOD-323 package. The operating temperature range extends to -65°C, providing enhanced low-temperature performance. Both parts are Active status and ROHS3 compliant. This substitute is suitable for direct replacement in existing designs.

BZX84J-B13,115 (Nexperia USA Inc.) is classified as a similar substitute with enhanced specifications. This part maintains the 13 V nominal voltage but features 550 mW power dissipation, providing 2.75× greater power handling capability. The tolerance is tightened to ±2%, and the part carries AEC-Q101 automotive qualification. The package variant is SOD-323F. This substitute is appropriate for applications requiring higher power dissipation or automotive-grade reliability.

DDZ9700S-7 (Diodes Incorporated) is classified as a similar substitute with matched electrical specifications. This part maintains 13 V nominal voltage, 200 mW power rating, and ±5% tolerance in SOD-323 package. The reverse leakage current is lower at 50 nA @ 9.8 V compared to the main part. Operating temperature range extends to -65°C. This substitute is suitable for direct replacement.

MM3Z13VB (onsemi) is classified as a similar substitute with tightened tolerance. This part maintains 13 V nominal voltage and 200 mW power rating with ±2% tolerance. The package variant is SOD-323F. Operating temperature range extends to -65°C. The impedance is higher at 28 Ohms. This substitute is appropriate for applications requiring improved voltage accuracy.

MM3Z13VC (onsemi) is classified as a similar substitute with matched specifications to the main part. This part maintains 13 V nominal voltage, 200 mW power rating, and ±5% tolerance in SOD-323F package. Operating temperature range extends to -65°C. This substitute is suitable for direct replacement with package variant consideration.

All substitute parts are Active status and ROHS3 compliant, meeting regulatory requirements equivalent to the main part.

Frequently Asked Questions (FAQ)

Q: Can MMSZ5243BS-7-F be used as a direct replacement for MMXZ5243B-TP?

A: Yes. MMSZ5243BS-7-F matches all critical electrical parameters: 13 V nominal zener voltage, 200 mW power rating, ±5% tolerance, and SOD-323 package. Both parts are Active status and ROHS3 compliant. The substitute provides extended low-temperature operation to -65°C.

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

A: SOD-323 and SOD-323F are both surface mount diode packages with identical electrical performance. The primary difference is mechanical: SOD-323F features a flat lead design, while SOD-323 uses standard leads. Both packages are compatible with standard PCB assembly processes. Package selection depends on PCB layout and assembly equipment specifications.

Q: Is BZX84J-B13,115 suitable for applications requiring 200 mW power dissipation?

A: Yes. BZX84J-B13,115 is rated for 550 mW maximum power dissipation, which exceeds the 200 mW requirement. This part provides additional thermal margin and is suitable for applications with higher power demands. The 13 V nominal voltage matches the primary part specification.

Q: What is the significance of the ±2% tolerance in MM3Z13VB compared to ±5% in MMXZ5243B-TP?

A: The ±2% tolerance in MM3Z13VB provides tighter voltage accuracy compared to the ±5% tolerance in MMXZ5243B-TP. This tighter tolerance is beneficial for applications requiring precise voltage regulation. Both parts maintain the 13 V nominal voltage specification and are electrically compatible.

Q: Can I use MM3Z13VB or MM3Z13VC in place of MMXZ5243B-TP without circuit modification?

A: Yes. Both MM3Z13VB and MM3Z13VC maintain the 13 V nominal voltage and 200 mW power rating. The SOD-323F package is mechanically compatible with SOD-323 footprints in most applications. Verify PCB layout and assembly equipment compatibility with the SOD-323F package variant before implementation.

Q: Does DDZ9700S-7 provide better performance than MMXZ5243B-TP?

A: DDZ9700S-7 provides lower reverse leakage current at 50 nA @ 9.8 V compared to 500 nA @ 9.9 V in MMXZ5243B-TP. This lower leakage may benefit applications sensitive to standby current. Both parts maintain identical 13 V nominal voltage and 200 mW power rating. The extended temperature range to -65°C provides enhanced low-temperature performance.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (MMSZ5243BS-7-F, BZX84J-B13,115, DDZ9700S-7, MM3Z13VB, MM3Z13VC) are ROHS3 compliant, matching the compliance status of MMXZ5243B-TP.

Q: What is the inventory status of substitute parts?

A: MMSZ5243BS-7-F has 7965 units in stock, BZX84J-B13,115 has 3895 units, DDZ9700S-7 has 3326 units, MM3Z13VB has 17502 units, and MM3Z13VC has 1150 units available. The main part MMXZ5243B-TP has 844 units in stock.