TZX7V5D-TAP Equivalent & Substitute Zener Diodes Reference

Part Overview

The TZX7V5D-TAP from Vishay General Semiconductor - Diodes Division is a Zener diode specified for 7.5 V nominal Zener voltage, 500 mW power dissipation, and DO-35 (DO-204AH) axial package. Its primary category is Diodes, Zener, and it meets automotive grade and AEC-Q101 qualification. Product status is Active. As inventory availability and supply continuity are crucial, identifying validated alternative models such as BZX79C7V5-T50A ensures uninterrupted production and offers flexibility in sourcing components matching electrical, mechanical, and compliance requirements.

Key Parameters

Parameter	TZX7V5D-TAP
Voltage - Zener (Nom) (Vz)	7.5 V
Power - Max	500 mW
Impedance (Max) (Zzt)	15 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 5 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA
Operating Temperature	-65°C ~ 175°C
Package / Case	DO-204AH, DO-35, Axial
Mounting Type	Through Hole
Product Status	Active
Grade	Automotive
Qualification	AEC-Q101

Substitute Part Grouping Explanation

Substitution is evaluated by matching essential parameters: Zener voltage rating, maximum power dissipation, maximum Zener impedance, reverse leakage current, forward voltage drop, operating temperature range, and mechanical compatibility (package type and mounting method). Only parts that align precisely with these criteria are considered equivalent substitutes in this reference.

Parameter Comparison

Parameter	TZX7V5D-TAP	BZX79C7V5-T50A
Voltage - Zener (Nom) (Vz)	7.5 V	7.5 V
Power - Max	500 mW	500 mW
Impedance (Max) (Zzt)	15 Ohms	15 Ohms
Current - Reverse Leakage @ Vr	1 µA @ 5 V	1 µA @ 5 V
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 200 mA	1.5 V @ 100 mA
Operating Temperature	-65°C ~ 175°C	-65°C ~ 200°C
Package / Case	DO-204AH, DO-35, Axial	DO-204AH, DO-35, Axial
Mounting Type	Through Hole	Through Hole
Product Status	Active	Active

Engineering Selection Recommendations

Both TZX7V5D-TAP and BZX79C7V5-T50A are classified as active, through-hole Zener diodes with a 7.5 V Zener voltage and identical power and impedance ratings. Each is compliant with RoHS and has an unrestricted moisture sensitivity level. The TZX7V5D-TAP includes automotive grade and AEC-Q101 qualification as part of its explicit specifications, while this information is not indicated for the BZX79C7V5-T50A. Selection should align with the required compliance and system-level qualification criteria.

Frequently Asked Questions (FAQ)

Q1: What criteria determine if a Zener diode can be substituted?
A: Substitute Zener diodes must match in Zener voltage, maximum power dissipation, Zener impedance, reverse leakage current, forward voltage characteristics, package type, mounting method, and relevant compliance or qualification.

Q2: Are both TZX7V5D-TAP and BZX79C7V5-T50A compatible in terms of package and footprint?
A: Yes, both utilize the DO-204AH (DO-35) axial through-hole package.

Q3: Is the electrical performance identical between TZX7V5D-TAP and BZX79C7V5-T50A?
A: Key Zener voltage, power, and impedance ratings, as well as reverse leakage, align directly; forward current differs at its specified test point.

Q4: Can differences in operating temperature range affect substitution?
A: Both diodes support -65°C minimum; BZX79C7V5-T50A is specified to a maximum of 200°C, while TZX7V5D-TAP is specified to 175°C.

Q5: Do compliance and qualification status affect part selection between the two?
A: TZX7V5D-TAP explicitly states automotive grade and AEC-Q101 qualification; BZX79C7V5-T50A does not list these. Select based on required end-application standards.

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