Equivalent & Substitute Parts Reference for MMBZ5259BW-TP

Part Overview

The MMBZ5259BW-TP is a Zener diode designed for interface applications, featuring a nominal Zener voltage of 39 V, maximum power rating of 200 mW, and ±5% tolerance. This device is housed in a surface mount SOT-323 (SC-70) package and is currently listed as Active. In engineering practice, identifying substitute models is essential for addressing supply chain fluctuations, optimizing inventory management, and ensuring uninterrupted product assembly during procurement or design adjustments.

Key Parameters

Manufacturer Part Number	Category	Voltage - Zener (Nom) (Vz)	Tolerance	Power - Max	Impedance (Max) (Zzt)	Current - Reverse Leakage @ Vr	Voltage - Forward (Vf) (Max) @ If	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package	Product Status
MMBZ5259BW-TP	Diodes, Zener	39 V	±5%	200 mW	80 Ohms	100 nA @ 30 V	900 mV @ 10 mA	-55°C ~ 150°C (TJ)	Surface Mount	SC-70, SOT-323	SOT-323	Active
MMBZ5259BW-7-F	Diodes, Zener	39 V	±5%	200 mW	80 Ohms	100 nA @ 30 V	900 mV @ 10 mA	-65°C ~ 150°C (TJ)	Surface Mount	SC-70, SOT-323	SOT-323	Active

Substitute Part Grouping Explanation

Substitute selection between MMBZ5259BW-TP and MMBZ5259BW-7-F is based strictly on electrical and mechanical parameters provided for Zener diode components. The allowed substitution is determined by the following critical specifications: Zener voltage (39 V), tolerance (±5%), power rating (200 mW), impedance (80 Ohms), reverse leakage current (100 nA @ 30 V), forward voltage (900 mV @ 10 mA), operating temperature range, surface mount capability, package type (SC-70, SOT-323), and product status.

Parameter Comparison

Parameter	MMBZ5259BW-TP	MMBZ5259BW-7-F
Voltage - Zener (Nom) (Vz)	39 V	39 V
Tolerance	±5%	±5%
Power - Max	200 mW	200 mW
Impedance (Max) (Zzt)	80 Ohms	80 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 30 V	100 nA @ 30 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	-55°C ~ 150°C (TJ)	-65°C ~ 150°C (TJ)
Mounting Type	Surface Mount	Surface Mount
Package / Case	SC-70, SOT-323	SC-70, SOT-323
Supplier Device Package	SOT-323	SOT-323
Product Status	Active	Active

Engineering Selection Recommendations

Both MMBZ5259BW-TP and MMBZ5259BW-7-F are listed as Active and share essential electrical and mechanical characteristics for surface mount Zener diodes in the SC-70, SOT-323 footprint. MMBZ5259BW-7-F additionally holds Automotive Grade and AEC-Q101 qualification, as well as ROHS3 and REACH compliance. Selection may be guided by required product certifications and qualification levels in addition to part availability.

Frequently Asked Questions (FAQ)

Q1: What are the primary criteria for substituting MMBZ5259BW-TP with MMBZ5259BW-7-F?
A1: The substitution is valid based on matching Zener voltage, tolerance, power rating, impedance, leakage current, forward voltage, mounting type, package, and product status.

Q2: Are there differences in packaging or mounting between MMBZ5259BW-TP and its substitute?
A2: Both diodes are designed for surface mount use and share the SC-70, SOT-323 package, enabling direct substitution in compatible PCBs.

Q3: Does the operating temperature range affect interchangeability?
A3: The listed temperature ranges are compatible for most applications; both diodes operate within a high-temperature range suitable for similar environments.

Q4: Is there any additional compliance offered by MMBZ5259BW-7-F?
A4: MMBZ5259BW-7-F is Automotive Grade, AEC-Q101 qualified, ROHS3 Compliant, and REACH Unaffected.

Q5: Can both parts be used in automotive applications?
A5: MMBZ5259BW-7-F explicitly provides automotive-grade and AEC-Q101 qualification. Selection should align with the necessary qualification standards per project requirements.

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