SMAJ110AE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMAJ110AE3/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 110V reverse standoff voltage class with a maximum clamping voltage of 177V and peak pulse current rating of 2.8A. The part is active in production status and fully compliant with RoHS3 and REACH regulations. Substitute parts are identified to address inventory availability, alternative sourcing requirements, or specific application constraints while maintaining electrical and mechanical compatibility within the SMAJ series specifications.

Substiute Parts

SMAJ110AE3/TR13

Microchip TechnologyIn Stock: 775SMAJ110AE3/TR13 Datasheet

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SMAJ110A

MeritekIn Stock: 2384SMAJ110A Datasheet

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SMAJ110A-13-F

Diodes IncorporatedIn Stock: 35503SMAJ110A-13-F Datasheet

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SMAJ110A-TP

Micro Commercial CoIn Stock: 15744SMAJ110A-TP Datasheet

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SMAJ120A-13-F

Diodes IncorporatedIn Stock: 4789SMAJ120A-13-F Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMAJ110AE3/TR13 is determined by the following critical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 110V
• Voltage - Clamping (Max) @ Ipp: 177V
• Package / Case: DO-214AC (SMA)
• Mounting Type: Surface Mount
• Type: Zener (Unidirectional)
• Unidirectional Channels: 1

Secondary Compatibility Factors:

• Current - Peak Pulse (10/1000µs): Minimum 2.3A (acceptable tolerance range)
• Power - Peak Pulse: Minimum 400W (acceptable tolerance range)
• Operating Temperature Range: Minimum -55°C to 150°C
• RoHS3 Compliance: Required
• Moisture Sensitivity Level: 1 (Unlimited)

Parts meeting all primary criteria and secondary compatibility factors are classified as direct electrical and mechanical equivalents. The SMAJ110A (Meritek), SMAJ110A-13-F (Diodes Incorporated), and SMAJ110A-TP (Micro Commercial Co) satisfy these requirements. The SMAJ120A-13-F is listed as a substitute option but operates at a higher voltage class (120V standoff, 193V clamping) and is suitable only for applications requiring elevated voltage protection margins.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (110V Class):

The SMAJ110A (Meritek), SMAJ110A-13-F (Diodes Incorporated), and SMAJ110A-TP (Micro Commercial Co) are direct electrical and mechanical equivalents to the SMAJ110AE3/TR13. All three parts maintain identical voltage specifications (110V standoff, 177V clamping), identical package geometry (DO-214AC/SMA), and full compliance with RoHS3 and REACH requirements. Peak pulse current ratings range from 2.26A to 2.3A, which falls within acceptable tolerance for general-purpose TVS applications. Peak pulse power ratings of 400W are suitable for applications where the original 500W specification is not a limiting design constraint.

The SMAJ110A-TP (Micro Commercial Co) offers an extended operating temperature range to 175°C, providing additional thermal margin for high-temperature environments compared to the original -65 to 150°C specification.

Alternative Voltage Class (120V Class):

The SMAJ120A-13-F (Diodes Incorporated) operates at a higher voltage class with 120V reverse standoff and 193V maximum clamping voltage. This part is suitable for applications requiring elevated overvoltage protection margins or where the protected circuit operates at higher nominal voltages. The 2A peak pulse current and 400W peak pulse power are lower than the original specification and must be evaluated against application requirements. This part is designated for automotive-grade applications.

Compliance and Availability:

All substitute parts maintain active production status and full RoHS3 compliance. Moisture sensitivity level remains at MSL 1 (Unlimited) across all options, eliminating moisture-related handling constraints. Inventory availability varies: SMAJ110A-13-F (Diodes Incorporated) offers the highest stock level at 35,400 units, followed by SMAJ110A-TP (Micro Commercial Co) at 15,718 units.

Frequently Asked Questions (FAQ)

Q: Can SMAJ110A-13-F be used as a direct replacement for SMAJ110AE3/TR13?

A: Yes. The SMAJ110A-13-F maintains identical voltage specifications (110V standoff, 177V clamping), package geometry (DO-214AC/SMA), and mounting type. Peak pulse current is 2.3A compared to 2.8A in the original part. This substitution is valid for applications where the lower current rating does not exceed circuit protection requirements.

Q: What is the difference between SMAJ110A-TP and SMAJ110A-13-F?

A: Both parts share identical electrical specifications (110V standoff, 177V clamping, 2.3A peak pulse current). The primary difference is operating temperature range: SMAJ110A-TP extends to 175°C (TA) while SMAJ110A-13-F operates to 150°C (TJ). SMAJ110A-TP is manufactured by Micro Commercial Co; SMAJ110A-13-F is manufactured by Diodes Incorporated.

Q: Is SMAJ120A-13-F compatible with circuits designed for SMAJ110AE3/TR13?

A: SMAJ120A-13-F is not a direct equivalent. It operates at a higher voltage class (120V standoff, 193V clamping) and lower peak pulse current (2A). This part is suitable only for applications where the circuit design accommodates higher clamping voltages and lower current ratings. Automotive-grade designation indicates suitability for automotive applications.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All listed substitute parts (SMAJ110A, SMAJ110A-13-F, SMAJ110A-TP, and SMAJ120A-13-F) are ROHS3 Compliant and REACH Unaffected, matching the compliance status of the original SMAJ110AE3/TR13.

Q: What is the moisture sensitivity level for substitute parts?

A: All substitute parts maintain Moisture Sensitivity Level 1 (Unlimited), identical to the original part. This classification eliminates moisture-related handling, storage, and reflow constraints.

Q: Which substitute offers the best inventory availability?

A: SMAJ110A-13-F (Diodes Incorporated) offers the highest inventory level at 35,400 units in stock, followed by SMAJ110A-TP (Micro Commercial Co) at 15,718 units. Both parts are direct electrical equivalents to the original SMAJ110AE3/TR13.

Q: Are all substitute parts surface-mount components in DO-214AC/SMA package?

A: Yes. All substitute parts are surface-mount devices in DO-214AC (SMA) package, maintaining identical PCB footprint and assembly compatibility with the original SMAJ110AE3/TR13.