TZX15A-TAP Equivalent & Substitute Parts

Part Overview

The TZX15A-TAP is an active Zener diode manufactured by Vishay General Semiconductor - Diodes Division, rated at 15 V nominal Zener voltage with 500 mW maximum power dissipation. This through-hole component is packaged in DO-204AH (DO-35) axial configuration and is qualified to AEC-Q101 automotive standards. The part is RoHS3 compliant and carries an unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs while maintaining functional equivalence within the specified parameter ranges.

Substiute Parts

TZX15A-TAP

Vishay General Semiconductor - Diodes DivisionIn Stock: 989TZX15A-TAP Datasheet

Current PartRFQ

1N5245B

Microchip TechnologyIn Stock: 14231N5245B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TZX15A-TAP is determined by the following critical parameters:

Electrical Equivalence Criteria:

• Nominal Zener voltage of 15 V
• Maximum power rating of 500 mW or greater
• Operating temperature range spanning -65°C to 175°C minimum
• Forward voltage maximum of 1.5 V at 200 mA or less
• Reverse leakage current within acceptable limits for the application

Mechanical Compatibility Criteria:

• Through-hole mounting type
• DO-204AH (DO-35) axial package configuration

Compliance Considerations:

• Product status must be Active
• ECCN and HTSUS classifications must align (EAR99 and 8541.10.0050)

The 1N5245B from Microchip Technology meets all electrical and mechanical substitution criteria, with identical nominal Zener voltage, power rating, operating temperature range, and package type. The substitute part demonstrates improved impedance characteristics (16 Ohms versus 40 Ohms maximum) and lower reverse leakage current (100 nA versus 1 µA), representing enhanced performance within the same functional category.

Parameter Comparison

Engineering Selection Recommendations

TZX15A-TAP Selection Basis: The TZX15A-TAP is the primary component choice when AEC-Q101 automotive qualification and RoHS3 compliance are mandatory requirements. This part carries active product status and is currently in stock with 955 units available. The automotive-grade qualification ensures suitability for temperature-critical and reliability-demanding applications within the -65°C to 175°C operating range.

1N5245B Selection Basis: The 1N5245B serves as a functional substitute when electrical performance enhancement is acceptable and automotive qualification is not a design requirement. This part demonstrates superior impedance characteristics (16 Ohms maximum versus 40 Ohms) and significantly lower reverse leakage current (100 nanoamperes versus 1 microampere), resulting in improved voltage regulation stability and reduced standby power consumption. The 1N5245B is active and available with 1375 units in stock. However, this part is RoHS non-compliant and lacks AEC-Q101 qualification, restricting its use to non-automotive applications.

Both parts share identical nominal Zener voltage, maximum power rating, operating temperature range, forward voltage characteristics, and DO-35 axial package configuration, ensuring direct mechanical and electrical interchangeability within their respective compliance domains.

Frequently Asked Questions (FAQ)

Q: Can the 1N5245B replace the TZX15A-TAP in automotive applications?

A: No. The TZX15A-TAP carries AEC-Q101 automotive qualification while the 1N5245B does not. Automotive applications require AEC-Q101 certification. The TZX15A-TAP must be used for automotive designs.

Q: Are the packages physically identical?

A: Yes. Both the TZX15A-TAP and 1N5245B use the DO-204AH (DO-35) axial through-hole package. They are mechanically interchangeable in terms of board layout and mounting.

Q: What is the difference in impedance between these parts?

A: The TZX15A-TAP has a maximum impedance of 40 Ohms, while the 1N5245B has a maximum impedance of 16 Ohms. Lower impedance in the 1N5245B results in better voltage regulation and reduced output impedance across the operating current range.

Q: How do the reverse leakage currents compare?

A: The TZX15A-TAP specifies 1 microampere reverse leakage at 11.5 V, while the 1N5245B specifies 100 nanoamperes at 11 V. The 1N5245B exhibits approximately 10 times lower reverse leakage, reducing standby power consumption in battery-powered applications.

Q: Can I use the 1N5245B in a RoHS-compliant design?

A: No. The 1N5245B is RoHS non-compliant. For RoHS-compliant designs, the TZX15A-TAP (RoHS3 compliant) must be used.

Q: Are the operating temperature ranges the same?

A: Yes. Both parts operate across the identical temperature range of -65°C to 175°C, ensuring thermal compatibility in temperature-critical applications.

Q: What is the significance of the ±5% tolerance on the 1N5245B?

A: The 1N5245B carries a ±5% Zener voltage tolerance specification, while the TZX15A-TAP does not specify a tolerance value in the provided data. This tolerance indicates the acceptable variation in the nominal 15 V Zener voltage for the 1N5245B across manufacturing lots.

Q: Are both parts currently in stock?

A: Yes. The TZX15A-TAP has 955 units in stock, and the 1N5245B has 1375 units in stock.

Q: Do both parts have the same forward voltage characteristics?

A: Yes. Both parts specify a maximum forward voltage of 1.5 V at 200 mA forward current, ensuring identical forward conduction behavior.