TZX7V5C-TAP Zener Diode 7.5V 500mW Equivalent & Substitute Parts

Part Overview

The TZX7V5C-TAP is a through-hole zener diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 7.5 V nominal zener voltage and 500 mW maximum power dissipation in a DO-35 (DO-204AH) axial package. This component is classified as Active and carries AEC-Q101 automotive qualification with ROHS3 compliance. Substitute parts are identified based on matching electrical specifications and mechanical compatibility to ensure functional equivalence in circuit applications.

Substiute Parts

TZX7V5C-TAP

Vishay General Semiconductor - Diodes DivisionIn Stock: 85227TZX7V5C-TAP Datasheet

Current PartRFQ

BZX79C7V5-T50A

Fairchild SemiconductorIn Stock: 80664BZX79C7V5-T50A Datasheet

UpgradeRFQ

1N5236B

Microchip TechnologyIn Stock: 124931N5236B Datasheet

MFR RecommendedRFQ

1N5236B TR PBFREE

Central Semiconductor CorpIn Stock: 109051N5236B TR PBFREE Datasheet

MFR RecommendedRFQ

1N755A TR PBFREE

Central Semiconductor CorpIn Stock: 51361N755A TR PBFREE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TZX7V5C-TAP are qualified based on the following critical parameters:

Electrical Equivalence Criteria:

• Nominal zener voltage of 7.5 V
• Maximum power rating of 500 mW
• Through-hole axial mounting configuration in DO-35 (DO-204AH) package
• Operating temperature range compatibility
• Reverse leakage current characteristics
• Forward voltage characteristics

Compliance Considerations:

• RoHS status (ROHS3 compliance preferred for new designs)
• REACH compliance status
• Automotive qualification where applicable

All identified substitute parts meet the core electrical specifications and mechanical compatibility requirements. Variations in impedance, reverse leakage current, and forward voltage are within acceptable ranges for functional substitution in standard zener diode applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: BZX79C7V5-T50A (Fairchild Semiconductor)

The BZX79C7V5-T50A provides direct electrical equivalence with identical impedance (15 Ohms) and reverse leakage characteristics (1 µA @ 5 V) to the TZX7V5C-TAP. This part extends the operating temperature range to 200°C and maintains full DO-35 axial package compatibility. Fairchild Semiconductor classification as Active ensures continued availability.

Secondary Substitute: 1N5236B TR PBFREE (Central Semiconductor Corp)

The 1N5236B TR PBFREE offers ROHS3 compliance with improved impedance characteristics (6 Ohms) and reduced forward voltage (1.1 V @ 200 mA). Extended operating temperature range to 200°C and lead-free construction support modern manufacturing requirements. Cut Tape packaging provides component-level distribution.

Alternative Substitute: 1N755A TR PBFREE (Central Semiconductor Corp)

The 1N755A TR PBFREE delivers superior reverse leakage performance (100 nA @ 1 V) with ROHS3 compliance and extended temperature range to 200°C. Reduced impedance (6 Ohms) and lead-free construction align with contemporary design standards. Cut Tape packaging supports automated assembly processes.

Tertiary Substitute: 1N5236B (Microchip Technology)

The 1N5236B provides functional equivalence with improved impedance (6 Ohms) and forward voltage characteristics. Note that this variant carries RoHS non-compliant status, limiting application in designs requiring environmental compliance certification.

Frequently Asked Questions (FAQ)

Q: Can BZX79C7V5-T50A replace TZX7V5C-TAP in automotive applications?

A: Yes. Both parts carry identical nominal zener voltage (7.5 V), power rating (500 mW), and impedance (15 Ohms). BZX79C7V5-T50A extends the operating temperature range to 200°C, providing enhanced thermal margin. Mechanical compatibility is confirmed through identical DO-35 axial package specifications.

Q: What is the difference between 1N5236B and 1N5236B TR PBFREE?

A: Both parts share identical electrical specifications (7.5 V, 500 mW, ±5% tolerance). The primary distinction is RoHS compliance: 1N5236B is RoHS non-compliant, while 1N5236B TR PBFREE is ROHS3 compliant with lead-free construction. Operating temperature range extends to 200°C for the lead-free variant.

Q: Why does 1N755A TR PBFREE show lower reverse leakage current?

A: The 1N755A TR PBFREE specifies reverse leakage at 1 V (100 nA), whereas other parts specify leakage at 5 V or 6 V. Reverse leakage current increases with applied voltage; measurement at lower voltage naturally yields lower values. This does not indicate superior performance but reflects different measurement conditions.

Q: Are all substitute parts available in the same packaging formats?

A: No. TZX7V5C-TAP is supplied in Tape & Box (TB) format. BZX79C7V5-T50A is supplied in Bulk. Both 1N5236B TR PBFREE and 1N755A TR PBFREE are supplied in Cut Tape (CT) format. Packaging selection depends on assembly requirements and order quantities.

Q: Can I use 1N5236B (Microchip) in new designs requiring RoHS compliance?

A: No. The 1N5236B variant from Microchip carries RoHS non-compliant status. For designs requiring environmental compliance certification, select 1N5236B TR PBFREE (Central Semiconductor) or 1N755A TR PBFREE (Central Semiconductor), both ROHS3 compliant.

Q: What is the significance of impedance variation between 15 Ohms and 6 Ohms?

A: Impedance affects zener voltage regulation under dynamic load conditions. Lower impedance (6 Ohms) provides improved voltage regulation with reduced voltage ripple. Selection depends on circuit requirements; both values are acceptable for standard zener diode applications within the specified power and voltage parameters.

Q: Is the extended temperature range of 200°C critical for substitution?

A: Extended temperature range provides additional thermal margin but is not a substitution requirement. The TZX7V5C-TAP operates to 175°C; substitute parts rated to 200°C offer enhanced reliability in high-temperature environments. Selection depends on application thermal specifications.