Equivalent & Substitute Parts for 2M14ZH Zener Diode

Part Overview

The 2M14ZH is a 14 V, 2 W Zener diode manufactured by Taiwan Semiconductor Corporation, packaged in DO-204AC (DO-15) axial through-hole configuration. This component is classified as Active product status and carries AEC-Q101 automotive qualification. The 2M14ZH serves voltage regulation and protection applications requiring a nominal Zener voltage of 14 V with ±5% tolerance and 2 W maximum power dissipation. Substitute parts are identified when equivalent electrical performance can be achieved within the specified parameter ranges while maintaining through-hole axial mounting compatibility and automotive-grade reliability standards.

Substiute Parts

2M14ZH

Taiwan Semiconductor CorporationIn Stock: 8182M14ZH Datasheet

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1N5350B-TP

Micro Commercial CoIn Stock: 53071N5350B-TP Datasheet

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1N5351B-TP

Micro Commercial CoIn Stock: 52311N5351B-TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 2M14ZH are identified based on the following critical parameters:

Primary Substitution Criteria:

• Zener voltage nominal value of 14 V (matching the main part specification)
• Tolerance of ±5% (electrical accuracy requirement)
• Through-hole axial mounting configuration (mechanical compatibility)
• DO-15 package compatibility (physical form factor)
• Active product status (availability and support)
• RoHS3 compliance (regulatory alignment)

Secondary Compatibility Factors:

• Power rating equal to or greater than 2 W (thermal capability)
• Operating temperature range that encompasses or exceeds -55°C to 175°C
• Impedance and reverse leakage characteristics within acceptable ranges for voltage regulation applications

The substitute parts identified (1N5350B-TP and 1N5351B-TP) meet the primary criteria for electrical and mechanical compatibility. The 1N5351B-TP provides an exact match on nominal Zener voltage (14 V), while the 1N5350B-TP operates at 13 V, which falls within the tolerance band of the 14 V specification when considering ±5% tolerance margins.

Parameter Comparison

Engineering Selection Recommendations

1N5351B-TP Selection Criteria: The 1N5351B-TP is the primary substitute for the 2M14ZH. Both components share an identical nominal Zener voltage of 14 V and ±5% tolerance specification. The 1N5351B-TP provides superior power dissipation capability (5 W versus 2 W), lower impedance (2.5 Ohms versus 5.5 Ohms), and improved thermal performance through higher power rating. Both parts maintain Active product status and ROHS3 compliance. The operating temperature range of the 1N5351B-TP (-55°C to 150°C) covers the lower portion of the 2M14ZH range; applications requiring operation above 150°C require the 2M14ZH. The 1N5351B-TP is suitable for direct substitution in applications where the reduced upper temperature limit is acceptable.

1N5350B-TP Selection Criteria: The 1N5350B-TP operates at 13 V nominal Zener voltage, which represents a 1 V deviation from the 2M14ZH specification. Within the ±5% tolerance band of the 14 V specification (13.3 V to 14.7 V), the 1N5350B-TP nominal value of 13 V falls outside the tolerance range. This part is suitable only for applications where a 13 V Zener voltage is functionally acceptable or where the 1 V difference does not impact circuit performance. The 1N5350B-TP shares identical mechanical compatibility, Active status, and ROHS3 compliance with the 2M14ZH.

Compliance and Certification: All three parts maintain Active product status, ROHS3 compliance, and REACH unaffected status. The 2M14ZH carries AEC-Q101 automotive qualification; the substitute parts do not list this qualification in the provided specifications. Applications requiring AEC-Q101 certification must use the 2M14ZH.

Frequently Asked Questions (FAQ)

Q: Can the 1N5351B-TP directly replace the 2M14ZH in all applications?

A: The 1N5351B-TP provides electrical and mechanical compatibility for most applications. The primary limitation is the reduced upper operating temperature limit (150°C versus 175°C for the 2M14ZH). Applications operating above 150°C junction temperature require the 2M14ZH. Applications requiring AEC-Q101 automotive qualification must use the 2M14ZH, as this certification is not specified for the 1N5351B-TP.

Q: What is the significance of the 1 V difference between the 2M14ZH (14 V) and 1N5350B-TP (13 V)?

A: The 2M14ZH nominal specification is 14 V with ±5% tolerance, establishing an acceptable range of 13.3 V to 14.7 V. The 1N5350B-TP nominal value of 13 V falls below this tolerance band. Substitution is appropriate only when circuit design accommodates a 13 V Zener voltage or when the 1 V difference does not affect circuit function.

Q: Are the DO-15 and DO-204AC package designations equivalent?

A: Yes. DO-15 and DO-204AC are equivalent designations for the same axial through-hole package. Both the main part and substitute parts use this package configuration, ensuring mechanical and electrical compatibility in through-hole PCB applications.

Q: What does the lower impedance (2.5 Ohms) of the substitute parts indicate compared to the 2M14ZH (5.5 Ohms)?

A: Lower impedance indicates improved voltage regulation characteristics and reduced dynamic resistance. The substitute parts (1N5350B-TP and 1N5351B-TP) provide superior regulation performance, particularly beneficial in applications requiring stable voltage output across varying load conditions.

Q: Why do the substitute parts have higher power ratings (5 W) than the 2M14ZH (2 W)?

A: Higher power rating provides greater thermal margin and allows operation at higher current levels without exceeding maximum junction temperature. The 5 W rating of the substitute parts enables use in higher-power applications while maintaining the same voltage regulation function.

Q: Is the 1 µA reverse leakage of the substitute parts significantly different from the 500 nA of the 2M14ZH?

A: The 1 µA reverse leakage of the substitute parts is twice the 500 nA specification of the 2M14ZH. This difference is negligible for most voltage regulation and protection applications. Applications with stringent leakage requirements should retain the 2M14ZH.

Q: Can the 2M14ZH be used in place of the 1N5350B-TP or 1N5351B-TP?

A: The 2M14ZH can substitute for the 1N5351B-TP in applications where the higher operating temperature capability (175°C versus 150°C) is beneficial. The 2M14ZH cannot substitute for the 1N5350B-TP due to the 1 V Zener voltage difference. The 2M14ZH's lower power rating (2 W versus 5 W) may limit use in high-power applications.