SMAJ7.5AE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMAJ7.5AE3/TR13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 7.5V reverse standoff voltage with a 12.9V maximum clamping voltage and 38.8A peak pulse current capability in a DO-214AC (SMA) package. The part is active in production status with RoHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified when alternative manufacturers offer TVS diodes with matching or functionally compatible electrical and mechanical specifications. Substitution becomes necessary due to supply chain availability, inventory levels, or manufacturer discontinuation notices.

Substiute Parts

SMAJ7.5AE3/TR13

Microchip TechnologyIn Stock: 1151SMAJ7.5AE3/TR13 Datasheet

Current PartRFQ

SMA5J7.5A-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 4467SMA5J7.5A-E3/61 Datasheet

DirectRFQ

SMAJ7.5A

MeritekIn Stock: 2027SMAJ7.5A Datasheet

SimilarRFQ

SMAJ7.5A

MeritekIn Stock: 2027SMAJ7.5A Datasheet

SimilarRFQ

SMAJ7.5A-13-F

Diodes IncorporatedIn Stock: 2285SMAJ7.5A-13-F Datasheet

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SMAJ7.5A-TP

Micro Commercial CoIn Stock: 5836SMAJ7.5A-TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ7.5AE3/TR13 are classified based on electrical parameter compatibility and mechanical interchangeability. The primary substitution criteria are:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 7.5V
• Voltage - Clamping (Max) @ Ipp: 12.9V
• Voltage - Breakdown (Min): 8.33V
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• Type: Zener

Secondary Compatibility Parameters:

• Current - Peak Pulse (10/1000µs): 38.8A (direct equivalent) or 31A (reduced capability)
• Power - Peak Pulse: 500W (direct equivalent) or 400W (reduced capability)
• Operating Temperature Range: -65°C to 150°C (original) or -55°C to 150°C (substitute range)
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories: Direct Equivalents (matching all critical and secondary parameters) and Functional Equivalents (matching all critical parameters with reduced peak pulse current and power ratings).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

The SMA5J7.5A-E3/61 from Vishay General Semiconductor is a direct electrical equivalent to the SMAJ7.5AE3/TR13. This part maintains identical voltage specifications (7.5V standoff, 12.9V clamping), peak pulse current (38.8A), and power dissipation (500W). The operating temperature range is -55°C to 150°C, which is narrower than the original part's -65°C to 150°C range. Both parts are RoHS3 compliant with MSL 1 rating and active production status. This substitute is suitable for applications where the lower temperature floor of -55°C is acceptable.

Functional Equivalents (Secondary Substitutes):

The SMAJ7.5A (Meritek), SMAJ7.5A-13-F (Diodes Incorporated), and SMAJ7.5A-TP (Micro Commercial Co) are functional equivalents with reduced peak pulse current (31A or 31.01A) and power dissipation (400W). All three maintain the critical voltage specifications and package compatibility. These parts are suitable for applications where peak pulse current requirements do not exceed 31A. All three are RoHS3 compliant with MSL 1 rating and active production status.

The SMAJ7.5A-TP from Micro Commercial Co offers an extended operating temperature range of -55°C to 175°C, providing thermal margin beyond the original specification.

All substitute parts are surface-mount components in DO-214AC (SMA) packaging with single unidirectional channels and zener diode topology, ensuring mechanical and functional compatibility with the original SMAJ7.5AE3/TR13.

Frequently Asked Questions (FAQ)

Q: Can the SMA5J7.5A-E3/61 be used as a direct replacement for SMAJ7.5AE3/TR13?

A: Yes. The SMA5J7.5A-E3/61 is a direct electrical equivalent with matching voltage specifications (7.5V standoff, 12.9V clamping), peak pulse current (38.8A), and power dissipation (500W). Both use identical DO-214AC (SMA) packaging. The operating temperature range differs (-55°C to 150°C versus -65°C to 150°C), which is acceptable for most applications operating above -55°C.

Q: What is the difference between the direct equivalent and functional equivalents?

A: The direct equivalent (SMA5J7.5A-E3/61) maintains the same peak pulse current (38.8A) and power dissipation (500W) as the original part. Functional equivalents (SMAJ7.5A, SMAJ7.5A-13-F, SMAJ7.5A-TP) have reduced peak pulse current (31A) and power dissipation (400W). All maintain identical voltage specifications and package compatibility. Selection depends on whether the application requires the full 38.8A pulse current capability.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original SMAJ7.5AE3/TR13 specifications.

Q: Can I use SMAJ7.5A-TP in high-temperature applications?

A: The SMAJ7.5A-TP supports an operating temperature range of -55°C to 175°C, which exceeds the original part's -65°C to 150°C range. This part is suitable for applications requiring operation above 150°C. However, it maintains the reduced peak pulse current (31A) and power dissipation (400W) of the functional equivalent group.

Q: Are all substitute parts available in tape and reel packaging?

A: Yes. All substitute parts are supplied in tape and reel (TR) packaging, matching the original SMAJ7.5AE3/TR13 format for automated assembly processes.

Q: What is the minimum operating temperature difference between the original part and substitutes?

A: The original SMAJ7.5AE3/TR13 operates from -65°C, while most substitutes operate from -55°C. This represents a 10°C difference at the lower temperature limit. Applications requiring operation below -55°C must use the original Microchip part or confirm substitute compatibility with the specific application environment.

Q: Do all parts use the same package footprint?

A: Yes. All parts use the DO-214AC (SMA) surface-mount package, ensuring identical PCB footprints and reflow soldering compatibility.