TZX12C-TAP Equivalent & Substitute Parts

Part Overview

The TZX12C-TAP is a 12 V, 500 mW Zener diode manufactured by Vishay General Semiconductor - Diodes Division in DO-35 axial through-hole packaging. This component is classified as Active product status and carries AEC-Q101 automotive qualification. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference circuits across industrial and automotive applications. Substitute parts are identified to address inventory availability, packaging format preferences, or specific compliance requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

TZX12C-TAP

Vishay General Semiconductor - Diodes DivisionIn Stock: 30493TZX12C-TAP Datasheet

Current PartRFQ

1N5242B TR PBFREE

Central Semiconductor CorpIn Stock: 32901N5242B TR PBFREE Datasheet

MFR RecommendedRFQ

1N5242BTR

Fairchild SemiconductorIn Stock: 503971N5242BTR Datasheet

MFR RecommendedRFQ

1N759A BK PBFREE

Central Semiconductor CorpIn Stock: 128191N759A BK PBFREE Datasheet

MFR RecommendedRFQ

1N759A TR PBFREE

Central Semiconductor CorpIn Stock: 210381N759A TR PBFREE Datasheet

MFR RecommendedRFQ

1N759A-1

Microchip TechnologyIn Stock: 9941N759A-1 Datasheet

MFR RecommendedRFQ

BZX79C12-T50A

onsemiIn Stock: 48027BZX79C12-T50A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TZX12C-TAP is determined by the following criteria:

Primary Electrical Parameters:

• Voltage - Zener (Nominal): 12 V (exact match required)
• Power - Maximum: 500 mW (exact match required)
• Package / Case: DO-204AH, DO-35, Axial (exact match required)
• Mounting Type: Through Hole (exact match required)

Secondary Electrical Parameters (allowable variation):

• Voltage - Zener Tolerance: ±5% tolerance is acceptable
• Impedance (Max): Variation permitted within design margins
• Current - Reverse Leakage: Variation permitted within design margins
• Voltage - Forward (Vf): Variation permitted within design margins
• Operating Temperature Range: Extended range acceptable; minimum -65°C and maximum ≥175°C required

Compliance Parameters:

• RoHS Status: ROHS3 Compliant preferred for new designs
• REACH Status: REACH Unaffected (all substitutes meet this requirement)
• Moisture Sensitivity Level: 1 (Unlimited) acceptable

All identified substitute parts meet the primary electrical and mechanical requirements. Secondary parameter variations are within acceptable engineering tolerances for this component category.

Parameter Comparison

Engineering Selection Recommendations

For ROHS3-Compliant Applications: The following substitutes maintain full ROHS3 compliance and are suitable for new designs and regulated environments: 1N5242B TR PBFREE, 1N5242BTR, 1N759A BK PBFREE, 1N759A TR PBFREE, and BZX79C12-T50A. All are Active product status with REACH Unaffected designation.

For Automotive and AEC-Q101 Applications: The TZX12C-TAP carries AEC-Q101 automotive qualification. Substitute parts should be evaluated for automotive qualification status in specific application requirements. All substitute parts listed are Active product status.

For Extended Temperature Range: Substitutes 1N5242B TR PBFREE, 1N5242BTR, 1N759A BK PBFREE, 1N759A TR PBFREE, and BZX79C12-T50A support operating temperatures to 200°C, exceeding the TZX12C-TAP specification of 175°C maximum.

For Packaging Format Flexibility:

• Cut Tape (CT) packaging: 1N5242B TR PBFREE, 1N759A TR PBFREE, BZX79C12-T50A
• Bulk packaging: 1N759A BK PBFREE, 1N759A-1
• Original Tape & Box format: TZX12C-TAP

For Non-Compliant Legacy Applications: The 1N759A-1 (Microchip Technology) is RoHS non-compliant and should be used only in applications where legacy component specifications are required. This part is not suitable for new designs subject to RoHS regulations.

Frequently Asked Questions (FAQ)

Q: Can I substitute the TZX12C-TAP with any of the listed parts in a new design?

A: All ROHS3-compliant substitutes (1N5242B TR PBFREE, 1N5242BTR, 1N759A BK PBFREE, 1N759A TR PBFREE, BZX79C12-T50A) are suitable for new designs. The 1N759A-1 is RoHS non-compliant and should not be used in new designs subject to RoHS regulations.

Q: What is the difference between the substitute parts?

A: All substitutes share the same nominal Zener voltage (12 V) and maximum power rating (500 mW). Differences exist in impedance (Zzt), forward voltage (Vf), maximum operating temperature, and packaging format. These variations are within acceptable engineering tolerances for this component category.

Q: Does packaging format affect electrical performance?

A: Packaging format (Tape & Box, Cut Tape, or Bulk) does not affect electrical performance. Format selection is determined by assembly process requirements, inventory management, and supply chain logistics.

Q: Are all substitutes compatible with the original TZX12C-TAP footprint?

A: Yes. All substitute parts use the same DO-35 axial through-hole package (DO-204AH), ensuring mechanical and footprint compatibility with the original design.

Q: What is the significance of the ±5% tolerance specification on substitute parts?

A: The ±5% tolerance on Zener voltage indicates the acceptable variation range around the nominal 12 V specification. This tolerance is standard for the substitute parts and is acceptable for most voltage regulation and protection applications.

Q: Can I use the 1N759A-1 in a production environment?

A: The 1N759A-1 is RoHS non-compliant. Use is restricted to legacy applications or environments where RoHS compliance is not required. For production environments subject to RoHS regulations, select from the ROHS3-compliant alternatives.

Q: How do I select between multiple ROHS3-compliant substitutes?

A: Selection criteria include: packaging format preference (Cut Tape, Bulk, or Tape & Box), impedance requirements (lower impedance provides better voltage regulation), forward voltage characteristics, and maximum operating temperature needs. All ROHS3-compliant options are electrically equivalent for standard 12 V, 500 mW Zener applications.