2M19ZHA0G Zener Diode Equivalent & Substitute Parts

Part Overview

The 2M19ZHA0G is a 19 V, 2 W Zener diode manufactured by Taiwan Semiconductor Corporation in DO-204AC (DO-15) axial through-hole packaging. This component is classified as Active product status with AEC-Q101 automotive qualification. Substitute parts are identified based on matching electrical characteristics, package compatibility, and compliance certifications to support design flexibility and supply chain continuity.

Substiute Parts

2M19ZHA0G

Taiwan Semiconductor CorporationIn Stock: 8532M19ZHA0G Datasheet

Current PartRFQ

1N5355B-TP

Micro Commercial CoIn Stock: 56661N5355B-TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 2M19ZHA0G are identified based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

• Zener voltage within ±5% tolerance band of 19 V nominal
• Through-hole axial package compatibility (DO-15 / DO-204AC)
• Reverse leakage current specification at comparable reference voltage
• Operating temperature range overlap with primary application requirements
• RoHS3 compliance and REACH unaffected status
• Active product status

The 1N5355B-TP meets these criteria with a nominal Zener voltage of 18 V (within the tolerance band of the 2M19ZHA0G), matching package configuration, and equivalent compliance certifications. The substitute part provides higher maximum power dissipation (5 W versus 2 W) and lower impedance (2.5 Ohms versus 11 Ohms), making it suitable for applications requiring enhanced thermal performance or lower dynamic impedance.

Parameter Comparison

Engineering Selection Recommendations

Both the 2M19ZHA0G and 1N5355B-TP are Active product status components with ROHS3 compliance and REACH unaffected designation, meeting current regulatory requirements for electronic component procurement.

The 2M19ZHA0G is specified with AEC-Q101 automotive qualification, indicating suitability for automotive applications with defined reliability and quality standards. The 1N5355B-TP does not carry explicit AEC-Q101 designation in the provided specifications.

Selection between these parts depends on application-specific requirements:

The 2M19ZHA0G is appropriate for applications requiring automotive-grade qualification and the specified 19 V nominal Zener voltage with 2 W maximum power dissipation.

The 1N5355B-TP is appropriate for applications where the 18 V nominal Zener voltage falls within acceptable tolerance, and where higher power dissipation capability (5 W) or lower impedance (2.5 Ohms) provides design advantages. The upper operating temperature limit of 150°C (versus 175°C for the main part) must be evaluated against application thermal requirements.

Both components share identical package configuration, reverse leakage current specification, and tolerance band, ensuring mechanical and electrical compatibility within the specified parameter ranges.

Frequently Asked Questions (FAQ)

Q: Can the 1N5355B-TP directly replace the 2M19ZHA0G in all applications?

A: Direct substitution is possible for applications where the 18 V nominal Zener voltage is acceptable within the ±5% tolerance band and the maximum operating temperature does not exceed 150°C. The higher power rating (5 W) and lower impedance (2.5 Ohms) of the 1N5355B-TP are compatible with circuits designed for the 2M19ZHA0G. Applications requiring AEC-Q101 automotive qualification must confirm the substitute part meets this requirement.

Q: What is the voltage difference between the 2M19ZHA0G and 1N5355B-TP?

A: The 2M19ZHA0G has a nominal Zener voltage of 19 V, while the 1N5355B-TP has a nominal Zener voltage of 18 V. Both parts carry ±5% tolerance, resulting in overlapping acceptable voltage ranges. The 1 V difference represents approximately 5.3% deviation, which falls within the tolerance specification of both components.

Q: Are the packages identical?

A: Yes. Both the 2M19ZHA0G and 1N5355B-TP use DO-204AC / DO-15 axial through-hole packaging. Physical dimensions and pin configuration are compatible for direct board-level substitution.

Q: What are the impedance differences and their implications?

A: The 2M19ZHA0G has a maximum impedance of 11 Ohms, while the 1N5355B-TP has a maximum impedance of 2.5 Ohms. Lower impedance in the 1N5355B-TP results in reduced voltage variation under load changes, providing improved voltage regulation performance in dynamic circuit conditions.

Q: Does the operating temperature range difference affect substitution?

A: The 2M19ZHA0G operates from -55°C to 175°C, while the 1N5355B-TP operates from -55°C to 150°C. Applications operating above 150°C ambient or junction temperature require the 2M19ZHA0G. Applications within the -55°C to 150°C range are compatible with both parts.

Q: What is the significance of the power rating difference?

A: The 2M19ZHA0G is rated for 2 W maximum power dissipation, while the 1N5355B-TP is rated for 5 W. The higher power rating of the 1N5355B-TP allows operation in higher current or higher dissipation applications. Circuits designed for 2 W operation are fully compatible with the 5 W rated substitute part.

Q: Are compliance certifications equivalent?

A: Both parts are ROHS3 compliant and REACH unaffected. The 2M19ZHA0G carries AEC-Q101 automotive qualification, which is not specified for the 1N5355B-TP. Applications requiring automotive-grade qualification must use the 2M19ZHA0G or confirm AEC-Q101 status for the substitute part through the manufacturer.