3EZ13D5-TP Equivalent & Substitute Parts

Part Overview

The 3EZ13D5-TP is a Zener diode manufactured by Micro Commercial Co, rated at 13 V nominal voltage with 3 W maximum power dissipation. This component is packaged in DO-15 (DO-204AC) axial through-hole configuration and is ROHS3 compliant. The part is currently in active production status with 1048 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit applications, particularly when packaging alternatives or different power ratings are acceptable for the target application.

Substiute Parts

3EZ13D5-TP

Micro Commercial CoIn Stock: 11253EZ13D5-TP Datasheet

Current PartRFQ

1N4743ATR

Fairchild SemiconductorIn Stock: 24081N4743ATR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3EZ13D5-TP is determined by the following critical parameters:

Electrical Equivalence Criteria:

• Zener voltage (Vz) must be 13 V nominal with ±5% tolerance
• Voltage tolerance must match or be tighter than ±5%
• Operating temperature range must encompass or exceed the application requirements

Mechanical Compatibility Criteria:

• Mounting type must be through-hole axial configuration
• Package footprint must be compatible with the circuit board layout
• Lead spacing and diameter must accommodate existing PCB holes

Regulatory & Compliance Criteria:

• RoHS3 compliance required for regulated applications
• ECCN classification must permit the intended use

The 1N4743ATR qualifies as a substitute based on matching nominal Zener voltage (13 V) and tolerance (±5%), identical through-hole axial mounting, and equivalent regulatory compliance. However, the 1N4743ATR has a reduced maximum power rating (1 W versus 3 W) and operates in a different package form (DO-41 versus DO-15), which affects thermal performance and physical placement constraints.

Parameter Comparison

Engineering Selection Recommendations

Primary Part (3EZ13D5-TP): The 3EZ13D5-TP is the specified component for applications requiring 3 W power dissipation at 13 V nominal Zener voltage. This part is in active production status with confirmed ROHS3 compliance and unlimited moisture sensitivity rating, making it suitable for regulated and commercial applications. The DO-15 package provides standard thermal performance for this power class.

Substitute Part (1N4743ATR): The 1N4743ATR is electrically equivalent in Zener voltage and tolerance specifications. This substitute is applicable only in applications where the maximum power dissipation requirement does not exceed 1 W. The DO-41 package is physically smaller than DO-15, which may require PCB layout modification. The substitute exhibits higher impedance (10 Ohms versus 4.5 Ohms) and higher reverse leakage current (5 µA versus 500 nA), which may affect circuit performance in precision voltage regulation applications. The substitute's extended operating temperature range (-65°C to 200°C) provides broader environmental coverage than the main part.

Selection between these parts must be based on the actual power dissipation requirements of the target circuit. If power dissipation exceeds 1 W, the 3EZ13D5-TP is mandatory. If power dissipation is confirmed below 1 W and PCB layout permits the DO-41 package, the 1N4743ATR is a valid alternative.

Frequently Asked Questions (FAQ)

Q: Can the 1N4743ATR directly replace the 3EZ13D5-TP in any circuit?

A: Direct replacement is limited by power rating. The 1N4743ATR is rated for 1 W maximum power dissipation, while the 3EZ13D5-TP is rated for 3 W. If the circuit dissipates more than 1 W in the Zener diode, the 1N4743ATR will exceed its thermal limits. Additionally, the different package form (DO-41 versus DO-15) requires verification of PCB hole spacing compatibility.

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

A: The 3EZ13D5-TP has a maximum impedance of 4.5 Ohms, while the 1N4743ATR has 10 Ohms. Higher impedance results in greater voltage variation across the Zener diode with changes in current. In precision voltage regulation circuits, this difference may affect output voltage stability and ripple performance.

Q: Are both parts RoHS compliant?

A: The 3EZ13D5-TP is explicitly ROHS3 compliant. The 1N4743ATR RoHS compliance status is not specified in the provided data. Verification with the supplier is required for applications subject to RoHS regulations.

Q: What is the impact of the reverse leakage current difference?

A: The 3EZ13D5-TP has reverse leakage of 500 nA at 9.9 V, while the 1N4743ATR has 5 µA at the same voltage. The higher leakage in the substitute part may introduce additional bias current in high-impedance circuits or precision measurement applications.

Q: Can the 1N4743ATR be used in applications requiring the full -55°C to 150°C temperature range?

A: Yes. The 1N4743ATR operating range of -65°C to 200°C encompasses the 3EZ13D5-TP range of -55°C to 150°C. However, the substitute's extended range does not compensate for power rating limitations or impedance differences.

Q: What packaging considerations apply when substituting these parts?

A: The 3EZ13D5-TP uses DO-15 (DO-204AC) package, while the 1N4743ATR uses DO-41 (DO-204AL) package. Both are axial through-hole configurations, but physical dimensions differ. PCB hole spacing, lead diameter, and component placement must be verified before substitution. The DO-41 package is typically smaller, which may allow denser board layouts but requires confirmation of mechanical fit.