2M6.8Z Zener Diode Equivalent & Substitute Parts

Part Overview

The 2M6.8Z is an active zener diode manufactured by Taiwan Semiconductor Corporation, rated at 6.8 V nominal with 2 W maximum power dissipation. This component is packaged in DO-204AC (DO-15) axial through-hole configuration and is ROHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to inventory constraints, design flexibility, or application-specific performance needs.

Substiute Parts

2M6.8Z

Taiwan Semiconductor CorporationIn Stock: 7972M6.8Z Datasheet

Current PartRFQ

1N5342B-TP

Micro Commercial CoIn Stock: 234681N5342B-TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2M6.8Z is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Zener voltage nominal rating must be 6.8 V
• Voltage tolerance must be ±5% or tighter
• Package and case type must be DO-204AC, DO-15, or axial equivalent
• Mounting type must be through-hole
• Operating temperature range must encompass or exceed -55°C to 175°C

Regulatory & Compliance Criteria:

• RoHS3 compliance required
• REACH unaffected status required
• ECCN classification EAR99

The 1N5342B-TP meets these substitution criteria with identical zener voltage (6.8 V), matching tolerance (±5%), compatible package configuration (DO-15 axial), and equivalent regulatory compliance. The substitute part provides enhanced performance characteristics including higher maximum power rating (5 W versus 2 W) and lower impedance (1 Ohm versus 1.5 Ohms), making it suitable for applications requiring greater thermal headroom or lower dynamic resistance.

Parameter Comparison

Engineering Selection Recommendations

2M6.8Z Selection Criteria:

• Applications requiring maximum operating temperature of 175°C
• Designs with thermal constraints limiting power dissipation to 2 W
• Specifications explicitly requiring Taiwan Semiconductor Corporation sourcing
• Inventory availability: 743 pieces in stock

1N5342B-TP Selection Criteria:

• Applications tolerating maximum operating temperature of 150°C
• Designs benefiting from higher power dissipation capability (5 W)
• Lower impedance requirement (1 Ohm maximum)
• Reduced reverse leakage current specification
• Inventory availability: 23,377 pieces in stock
• Both parts maintain ROHS3 compliance and REACH unaffected status

Both parts are active products with equivalent regulatory compliance. Selection between them depends on thermal operating range requirements and power dissipation headroom in the application circuit.

Frequently Asked Questions (FAQ)

Q: Can 1N5342B-TP directly replace 2M6.8Z in all applications?

A: Direct substitution is valid for applications operating at or below 150°C. Applications requiring operation above 150°C must use the 2M6.8Z, as the substitute part is rated to 150°C maximum junction temperature.

Q: What is the significance of the different power ratings (2 W vs. 5 W)?

A: The 1N5342B-TP can dissipate up to 5 W of power, compared to 2 W for the 2M6.8Z. This provides additional thermal margin in circuits with higher current demands. Both parts maintain the same 6.8 V zener voltage regulation.

Q: Are the packages physically identical?

A: Both parts use DO-15 axial through-hole packaging. The 2M6.8Z is specified as DO-204AC (DO-15), while the 1N5342B-TP is specified as DO-15. These designations refer to the same physical package configuration and are mechanically interchangeable on PCBs designed for axial through-hole components.

Q: How do the impedance specifications affect circuit performance?

A: The 1N5342B-TP has lower maximum impedance (1 Ohm) compared to the 2M6.8Z (1.5 Ohms). Lower impedance results in better voltage regulation under load changes and reduced dynamic resistance in the zener operating region.

Q: What does the reverse leakage current difference indicate?

A: The 1N5342B-TP exhibits lower reverse leakage (10 µA @ 5.2 V) compared to the 2M6.8Z (1 mA @ 5.5 V). Lower leakage current indicates better reverse blocking characteristics and reduced standby power consumption in the circuit.

Q: Are both parts RoHS3 compliant?

A: Yes, both the 2M6.8Z and 1N5342B-TP are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: Which part should be selected for new designs?

A: Selection depends on the specific application requirements. For designs with thermal constraints below 150°C, the 1N5342B-TP offers superior performance characteristics (higher power rating, lower impedance, lower leakage). For applications requiring operation up to 175°C, the 2M6.8Z is the appropriate choice.