SMAJ64E3/TR13 Equivalent & Substitute Parts

Part Overview

The SMAJ64E3/TR13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This surface-mount component operates in the 64V reverse standoff voltage class and features a 114V maximum clamping voltage with 4.4A peak pulse current capability. The part is currently in active production status with 997 units available in inventory. Substitute parts are identified to address supply chain requirements, alternative sourcing needs, or specific application constraints while maintaining electrical and mechanical compatibility within the SMAJ64 series specifications.

Substiute Parts

SMAJ64E3/TR13

Microchip TechnologyIn Stock: 1048SMAJ64E3/TR13 Datasheet

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SMAJ64A

MeritekIn Stock: 122511SMAJ64A Datasheet

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SMAJ64A

MeritekIn Stock: 122511SMAJ64A Datasheet

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SMAJ64A-13-F

Diodes IncorporatedIn Stock: 17862SMAJ64A-13-F Datasheet

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SMAJ64A-TP

Micro Commercial CoIn Stock: 5779SMAJ64A-TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMAJ64E3/TR13 is determined by the following critical parameters:

Mandatory Matching Criteria:

• Voltage - Reverse Standoff (Typ): 64V
• Voltage - Breakdown (Min): 71.1V
• Package / Case: DO-214AC (SMA)
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• Type: Zener
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameters:

• Voltage - Clamping (Max) @ Ipp: 103V to 114V (lower clamping voltage acceptable for reduced transient stress)
• Current - Peak Pulse (10/1000µs): 3.88A to 4.4A (lower current rating acceptable for reduced energy dissipation)
• Power - Peak Pulse: 400W to 500W (lower power rating acceptable)
• Operating Temperature Range: -55°C to 175°C (wider or equivalent ranges acceptable)

All identified substitute parts maintain the core voltage protection class and mechanical compatibility required for direct board-level replacement within the SMAJ64 series.

Parameter Comparison

Engineering Selection Recommendations

SMAJ64A (Meritek): This substitute maintains all mandatory electrical parameters and mechanical compatibility. The reduced clamping voltage (103V vs. 114V) and peak pulse current (3.88A vs. 4.4A) result in lower transient stress on the protected circuit. This part is suitable for applications where the lower energy dissipation profile is acceptable. Meritek manufacturing maintains ROHS3 compliance and MSL 1 rating. Inventory availability is significantly higher at 122,500 units.

SMAJ64A-13-F (Diodes Incorporated): This substitute provides equivalent electrical performance to the Meritek variant with marginally higher peak pulse current (3.9A). Diodes Incorporated is an established manufacturer with active product status. The part maintains full compliance with RoHS3 and MSL 1 specifications. Operating temperature range remains -55 to 150°C. Inventory of 17,850 units supports medium-term supply requirements.

SMAJ64A-TP (Micro Commercial Co): This substitute offers the widest operating temperature range (-55 to 175°C) among all alternatives, providing enhanced thermal margin for high-temperature applications. Peak pulse current and clamping voltage match the Diodes Incorporated variant. Micro Commercial Co maintains ROHS3 compliance and MSL 1 rating. Inventory of 5,716 units is available for immediate procurement.

All substitute parts are active products with full regulatory compliance. Selection should be based on supply chain availability, thermal operating requirements, and acceptable transient stress levels for the target application.

Frequently Asked Questions (FAQ)

Q: Can SMAJ64A substitute directly for SMAJ64E3/TR13 on the PCB?

A: Yes. Both parts share identical reverse standoff voltage (64V), breakdown voltage (71.1V), package type (DO-214AC/SMA), and mounting configuration (surface mount). The reduced clamping voltage and peak pulse current of the SMAJ64A represent lower transient stress, which is acceptable for most general-purpose protection applications.

Q: What is the difference between the 114V and 103V clamping voltages?

A: The SMAJ64E3/TR13 clamps transients at a maximum of 114V, while substitute parts clamp at 103V. The lower clamping voltage in substitutes provides tighter voltage regulation during transient events, reducing overstress on downstream components. This is a beneficial characteristic for sensitive circuit protection.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The SMAJ64E3/TR13 and all identified substitutes (SMAJ64A, SMAJ64A-13-F, SMAJ64A-TP) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, meeting current environmental and reliability standards.

Q: Which substitute has the best thermal performance?

A: The SMAJ64A-TP (Micro Commercial Co) offers the widest operating temperature range at -55 to 175°C, compared to -55 to 150°C for other substitutes and -65 to 150°C for the original part. This makes SMAJ64A-TP suitable for high-temperature applications.

Q: Do all substitutes use the same DO-214AC (SMA) package?

A: Yes. All substitute parts use the DO-214AC (SMA) surface-mount package, ensuring mechanical and footprint compatibility with the original SMAJ64E3/TR13 design.

Q: What is the inventory status for each part?

A: SMAJ64E3/TR13 has 997 units available. SMAJ64A (Meritek) has the highest inventory at 122,500 units. SMAJ64A-13-F (Diodes Inc) has 17,850 units. SMAJ64A-TP (Micro Commercial Co) has 5,716 units. Selection based on supply chain timing should consider these availability levels.

Q: Are there any electrical performance differences that affect circuit design?

A: The substitute parts operate within the same 64V reverse standoff voltage class and maintain the same breakdown voltage (71.1V). The lower peak pulse current (3.88A to 3.9A vs. 4.4A) and power dissipation (400W vs. 500W) in substitutes indicate reduced transient energy handling. Applications requiring the full 4.4A capability should retain the original SMAJ64E3/TR13 or confirm substitute adequacy through transient analysis.