MMBZ5230B-TP Equivalent & Substitute Parts

Part Overview

The MMBZ5230B-TP is an active-status Zener diode manufactured by Micro Commercial Co, rated at 4.7 V nominal with 350 mW maximum power dissipation in a surface mount SOT-23 package. This component is designed for voltage regulation and protection applications in electronic circuits. Substitute parts are identified to address inventory availability, packaging format preferences, or specific application requirements while maintaining electrical and mechanical compatibility within defined parameter tolerances.

Substiute Parts

MMBZ5230B-TP

Micro Commercial CoIn Stock: 3579MMBZ5230B-TP Datasheet

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BZX84B4V7-7-F

Diodes IncorporatedIn Stock: 9203BZX84B4V7-7-F Datasheet

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MMBZ5230B-7-F

Diodes IncorporatedIn Stock: 2499MMBZ5230B-7-F Datasheet

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MMBZ5230BLT1G

onsemiIn Stock: 40969MMBZ5230BLT1G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MMBZ5230B-TP is determined by the following critical parameters:

Mandatory Matching Criteria:

• Zener voltage (Nom): 4.7 V
• Package / Case: SOT-23-3 (TO-236-3, SC-59)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameters:

• Tolerance: ±5% or tighter (±2% acceptable)
• Power - Max: Equal to or greater than 350 mW (lower ratings acceptable only if application power requirements are reduced)
• Impedance (Max): 19 Ohms or lower
• Current - Reverse Leakage @ Vr: 5 µA @ 2 V or lower
• Voltage - Forward (Vf) (Max) @ If: 900 mV @ 10 mA or lower
• Operating Temperature Range: Must encompass or exceed -55°C to 150°C

All identified substitute parts meet the mandatory matching criteria. Variations in allowable parameters are documented in the comparison table below.

Parameter Comparison

Engineering Selection Recommendations

MMBZ5230B-7-F (Diodes Incorporated)

This substitute provides identical electrical specifications to the MMBZ5230B-TP with matching 4.7 V nominal voltage, ±5% tolerance, 350 mW power rating, and 19 Ohms maximum impedance. The extended operating temperature range (-65 to 150°C) provides additional thermal margin. Packaging format differs (Cut Tape & Digi-Reel® versus Tape & Reel), which may affect procurement and assembly workflows. All compliance certifications (ROHS3, REACH Unaffected) are equivalent. This part is suitable for direct substitution in applications requiring identical power handling and impedance characteristics.

BZX84B4V7-7-F (Diodes Incorporated)

This substitute maintains the 4.7 V nominal voltage and SOT-23-3 package compatibility. Tolerance is tighter at ±2%, providing improved voltage accuracy. Maximum power dissipation is reduced to 300 mW, and impedance is higher at 80 Ohms. Reverse leakage current is lower at 3 µA @ 2 V. Extended operating temperature range (-65 to 150°C) exceeds the original specification. This part is suitable for applications where reduced power dissipation is acceptable and improved voltage tolerance is beneficial. Applications requiring the full 350 mW power rating should not use this substitute.

MMBZ5230BLT1G (onsemi)

This substitute maintains the 4.7 V nominal voltage, ±5% tolerance, and SOT-23-3 package compatibility. Maximum power dissipation is reduced to 225 mW, representing a 36% reduction from the original 350 mW rating. Impedance remains at 19 Ohms. Extended operating temperature range (-65 to 150°C) exceeds the original specification. This part is suitable only for applications where power dissipation does not exceed 225 mW. Applications requiring higher power handling should not use this substitute.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and REACH Unaffected status, ensuring regulatory and environmental compatibility with the original component.

Frequently Asked Questions (FAQ)

Q: Can MMBZ5230B-7-F replace MMBZ5230B-TP in all applications?

A: Yes. MMBZ5230B-7-F provides identical electrical performance with matching 4.7 V nominal voltage, ±5% tolerance, 350 mW power rating, and 19 Ohms impedance. The extended operating temperature range (-65 to 150°C) provides additional thermal capability. Packaging format differs (Cut Tape & Digi-Reel® versus Tape & Reel), which may require assembly process adjustments but does not affect electrical compatibility.

Q: What are the limitations of BZX84B4V7-7-F as a substitute?

A: BZX84B4V7-7-F has two key limitations: (1) Maximum power dissipation is 300 mW instead of 350 mW, and (2) Maximum impedance is 80 Ohms instead of 19 Ohms. These parameters must be evaluated against application requirements. The tighter ±2% tolerance and lower reverse leakage current (3 µA @ 2 V) are performance improvements. This substitute is suitable only for applications where power dissipation does not exceed 300 mW and impedance specifications allow 80 Ohms.

Q: Can MMBZ5230BLT1G be used as a direct replacement?

A: MMBZ5230BLT1G is a direct package and voltage replacement but with reduced power handling. Maximum power dissipation is 225 mW, which is 36% lower than the original 350 mW rating. This substitute is suitable only for applications where power dissipation requirements do not exceed 225 mW. Applications requiring the full 350 mW power rating must use MMBZ5230B-TP or MMBZ5230B-7-F.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts (MMBZ5230B-7-F, BZX84B4V7-7-F, and MMBZ5230BLT1G) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating and REACH Unaffected status, matching the original MMBZ5230B-TP specifications.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel® packaging?

A: Tape & Reel (TR) is continuous reel packaging for high-volume automated assembly. Cut Tape (CT) & Digi-Reel® provides smaller quantities in cut tape format with optional reel packaging. Both formats contain identical components; the difference is in procurement and assembly logistics. Selection depends on production volume and assembly equipment compatibility.

Q: Do all substitute parts support the same operating temperature range?

A: No. The original MMBZ5230B-TP operates from -55°C to 150°C. All three substitute parts extend the lower temperature limit to -65°C, providing an additional 10°C of cold-temperature capability. The upper temperature limit remains 150°C for all parts. Applications operating below -55°C benefit from the extended range of substitute parts.

Q: Which substitute part provides the best voltage accuracy?

A: BZX84B4V7-7-F provides the tightest voltage tolerance at ±2%, compared to ±5% for the original MMBZ5230B-TP and other substitutes. This improved accuracy is beneficial for applications requiring precise voltage regulation. However, this part has reduced power handling (300 mW) and higher impedance (80 Ohms), which must be evaluated against application requirements.