TZX8V2A-TAP Equivalent & Substitute Parts

Part Overview

The TZX8V2A-TAP is an 8.2 V, 500 mW Zener diode manufactured by Vishay General Semiconductor - Diodes Division in DO-35 (DO-204AH) through-hole package. This component is classified as an active product with AEC-Q101 automotive qualification and ROHS3 compliance. Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers and packaging configurations.

Substiute Parts

TZX8V2A-TAP

Vishay General Semiconductor - Diodes DivisionIn Stock: 1703TZX8V2A-TAP Datasheet

Current PartRFQ

1N5237B

Microchip TechnologyIn Stock: 364551N5237B Datasheet

MFR RecommendedRFQ

1N5237B TR PBFREE

Central Semiconductor CorpIn Stock: 107711N5237B TR PBFREE Datasheet

MFR RecommendedRFQ

1N756A BK PBFREE

Central Semiconductor CorpIn Stock: 207831N756A BK PBFREE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TZX8V2A-TAP is determined by the following critical parameters:

Electrical Equivalence Criteria:

• Zener voltage nominal value: 8.2 V
• Maximum power dissipation: 500 mW
• Package type: DO-35 (DO-204AH) through-hole axial configuration
• Operating temperature range: minimum -65°C to 175°C

Regulatory & Compliance Criteria:

• RoHS compliance status (ROHS3 preferred for new designs)
• REACH compliance status
• Automotive qualification (AEC-Q101 for automotive applications)

Acceptable Variations:

• Zener voltage tolerance: ±5% acceptable
• Impedance (Zzt): values ≤ 20 Ohms acceptable
• Reverse leakage current: values ≤ 3 µA @ specified voltage acceptable
• Forward voltage: values ≤ 1.5 V @ 200 mA acceptable
• Packaging format: Tape & Box, Cut Tape, or Bulk acceptable for equivalent electrical performance

The three substitute parts listed maintain electrical equivalence within these parameters while offering alternative sourcing options across different manufacturers and packaging configurations.

Parameter Comparison

Engineering Selection Recommendations

1N5237B (Microchip Technology)

This substitute maintains electrical equivalence with 8.2 V nominal zener voltage and 500 mW power rating in DO-35 package. The 8 Ohm impedance is superior to the main part specification. However, this variant is RoHS non-compliant, making it unsuitable for new designs requiring regulatory compliance. Existing legacy designs with established RoHS exemptions may utilize this part.

1N5237B TR PBFREE (Central Semiconductor Corp)

This substitute is fully equivalent to the main part with ROHS3 compliance and extended operating temperature range (-65°C to 200°C). The cut tape packaging format provides alternative sourcing. The 1.1 V forward voltage specification is superior to the main part. This part is suitable for new designs and applications requiring automotive-grade reliability.

1N756A BK PBFREE (Central Semiconductor Corp)

This substitute provides electrical equivalence with superior reverse leakage characteristics (100 nA @ 1 V). ROHS3 compliance and extended operating temperature range (-65°C to 200°C) are provided. Bulk packaging format offers alternative sourcing options. This part is suitable for applications requiring low leakage current performance and regulatory compliance.

All three substitutes maintain the critical 8.2 V zener voltage and 500 mW power rating. Selection between substitutes depends on packaging requirements, compliance mandates, and specific performance criteria for reverse leakage or forward voltage characteristics.

Frequently Asked Questions (FAQ)

Q: Can the 1N5237B substitute for the TZX8V2A-TAP in new designs?

A: The 1N5237B provides electrical equivalence but is RoHS non-compliant. For new designs requiring regulatory compliance, use 1N5237B TR PBFREE or 1N756A BK PBFREE instead.

Q: What is the difference between the three substitute parts?

A: All three maintain 8.2 V nominal zener voltage and 500 mW power rating. Key differences include: 1N5237B lacks RoHS compliance; 1N5237B TR PBFREE offers cut tape packaging and 1.1 V forward voltage; 1N756A BK PBFREE provides superior reverse leakage (100 nA) and bulk packaging.

Q: Are the substitute parts pin-compatible with the TZX8V2A-TAP?

A: Yes. All substitute parts use DO-35 (DO-204AH) through-hole axial package with identical pin configuration and mechanical dimensions.

Q: Does operating temperature range affect substitution?

A: The main part operates -65°C to 175°C. Both 1N5237B TR PBFREE and 1N756A BK PBFREE extend to 200°C, providing additional thermal margin. The 1N5237B matches the main part range at -65°C to 175°C.

Q: What packaging formats are available for these substitutes?

A: TZX8V2A-TAP is supplied in Tape & Box format. Substitutes are available in Bulk (1N5237B, 1N756A BK PBFREE) and Cut Tape (1N5237B TR PBFREE) formats. All formats contain electrically identical components.

Q: Which substitute is recommended for automotive applications?

A: The TZX8V2A-TAP carries AEC-Q101 automotive qualification. For automotive applications, 1N5237B TR PBFREE or 1N756A BK PBFREE are suitable as they provide ROHS3 compliance and extended temperature range. Verify specific automotive qualification requirements with the application engineer.

Q: How do impedance specifications affect circuit performance?

A: The main part specifies 20 Ohm maximum impedance. All substitutes specify 8 Ohm maximum impedance, which is superior and provides tighter voltage regulation characteristics. This represents an improvement over the main part specification.

Q: Can reverse leakage current differences impact circuit design?

A: The main part specifies 1 µA @ 6.2 V. Substitutes specify 3 µA @ 6.5 V (1N5237B variants) or 100 nA @ 1 V (1N756A BK PBFREE). For applications sensitive to leakage current, 1N756A BK PBFREE provides superior performance. For standard applications, all variants are functionally equivalent.