2M43Z Zener Diode Equivalent & Substitute Parts

Part Overview

The 2M43Z is an active-status Zener diode manufactured by Taiwan Semiconductor Corporation, rated for 43 V nominal Zener voltage and 2 W maximum power dissipation. This component is packaged in DO-204AC (DO-15) axial through-hole configuration and is ROHS3 compliant with unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, design flexibility, or application-specific power handling requirements.

Substiute Parts

2M43Z

Taiwan Semiconductor CorporationIn Stock: 10402M43Z Datasheet

Current PartRFQ

1N5367B-TP

Micro Commercial CoIn Stock: 49301N5367B-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2M43Z is permissible when the following electrical and mechanical criteria are satisfied:

Primary Substitution Criteria:

• Zener voltage (Vz) must equal 43 V nominal with ±5% tolerance
• Reverse leakage current must not exceed 500 nA @ 32.7 V
• Package / Case must be DO-204AC, DO-15, or equivalent axial through-hole configuration
• Mounting type must be Through Hole
• RoHS3 compliance and REACH unaffected status must be maintained

Secondary Considerations:

• Power rating may exceed 2 W without restriction
• Impedance (Zzt) may be lower than 35 Ohms
• Operating temperature range may be equal to or exceed -55°C to 175°C

The substitute part 1N5367B-TP meets all primary criteria and exceeds power handling capability (5 W vs. 2 W), making it a valid substitute for applications requiring higher power dissipation or improved thermal performance.

Parameter Comparison

Engineering Selection Recommendations

2M43Z Selection Criteria:

• Applications requiring maximum operating temperature of 175°C
• Designs with thermal constraints limiting power dissipation to 2 W
• Systems where lower impedance is not a requirement
• Inventory availability: 998 Pcs in stock

1N5367B-TP Selection Criteria:

• Applications requiring power dissipation up to 5 W
• Designs benefiting from lower impedance (20 Ohms vs. 35 Ohms)
• Systems operating within -55°C to 150°C temperature range
• Higher inventory availability: 4889 Pcs in stock
• Cut Tape packaging for automated assembly processes

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory conformance across manufacturing and end-use jurisdictions.

Frequently Asked Questions (FAQ)

Q: Can 1N5367B-TP directly replace 2M43Z in all applications?

A: Direct replacement is permissible when the application operating temperature does not exceed 150°C. The 2M43Z supports operation to 175°C, which 1N5367B-TP does not. Verify application temperature requirements before substitution.

Q: What is the significance of the impedance difference between these parts?

A: The 1N5367B-TP has lower impedance (20 Ohms vs. 35 Ohms), resulting in improved voltage regulation and reduced dynamic resistance. This is advantageous in applications requiring tighter voltage stability but does not prevent substitution.

Q: Are the packaging formats interchangeable?

A: Both parts use DO-15 axial through-hole configuration. The 2M43Z is supplied in Tape & Reel (TR) format, while 1N5367B-TP is supplied in Cut Tape (CT) format. Both are compatible with through-hole PCB assembly; packaging format selection depends on manufacturing process requirements.

Q: Does the higher power rating of 1N5367B-TP affect circuit performance?

A: No. Higher power rating indicates greater thermal capacity and does not alter electrical performance at equivalent operating points. The 43 V Zener voltage and ±5% tolerance remain identical.

Q: What compliance certifications apply to both parts?

A: Both 2M43Z and 1N5367B-TP are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for electronic component manufacturing and distribution in applicable jurisdictions.

Q: Can 2M43Z substitute for 1N5367B-TP?

A: Substitution is permissible only when the application power dissipation does not exceed 2 W and operating temperature does not exceed 175°C. The 2M43Z does not provide the enhanced power handling of 1N5367B-TP.