SMAJ75AE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMAJ75AE3/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 75V reverse standoff voltage class with a maximum clamping voltage of 121V and peak pulse current rating of 4.1A. The device is packaged in DO-214AC (SMA) format on tape and reel for automated assembly.

The SMAJ75AE3/TR13 maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching electrical performance parameters, package compatibility, and operational temperature ranges within acceptable engineering tolerances.

Substiute Parts

SMAJ75AE3/TR13

Microchip TechnologyIn Stock: 808SMAJ75AE3/TR13 Datasheet

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SMAJ75A

MDDIn Stock: 37444SMAJ75A Datasheet

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SMAJ75A

MDDIn Stock: 37444SMAJ75A Datasheet

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SMAJ75A-13-F

Diodes IncorporatedIn Stock: 18084SMAJ75A-13-F Datasheet

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SMAJ75A-TP

Micro Commercial CoIn Stock: 5826SMAJ75A-TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ75AE3/TR13 are qualified based on the following critical electrical and mechanical parameters:

Matching Parameters (Required for Substitution):

• Voltage - Reverse Standoff (Typ): 75V
• Voltage - Breakdown (Min): 83.3V
• Voltage - Clamping (Max) @ Ipp: 121V
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Type: Zener
• Unidirectional Channels: 1
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variations:

• Current - Peak Pulse (10/1000µs): 3.3A to 4.1A (substitute parts rated at 3.3A operate within acceptable design margins for general-purpose applications)
• Power - Peak Pulse: 400W to 500W (proportional to current rating)
• Operating Temperature Range: Minimum -55°C acceptable (original -65°C); Maximum 150°C to 175°C acceptable

All substitute parts maintain identical voltage specifications, package format, and compliance certifications, ensuring direct functional equivalence in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain active product status and full RoHS3 compliance, qualifying them for direct replacement in applications requiring the SMAJ75AE3/TR13.

SMAJ75A (MDD): This substitute provides identical voltage specifications and package format. The 3.3A peak pulse current rating represents a 19.5% reduction from the original 4.1A specification. The operating temperature range of -50 to 150°C is narrower at the lower bound by 15°C compared to the original -65 to 150°C range. This part is suitable for applications where the lower temperature limit of -50°C is acceptable and peak pulse current requirements do not exceed 3.3A.

SMAJ75A-13-F (Diodes Incorporated): This substitute maintains identical voltage specifications and package format with 3.3A peak pulse current rating. The operating temperature range of -55 to 150°C provides a lower temperature limit of -55°C, which is 10°C higher than the original specification but acceptable for most general-purpose applications. Tape and reel packaging is provided. This part is suitable for applications where the -55°C lower temperature limit is acceptable.

SMAJ75A-TP (Micro Commercial Co): This substitute provides identical voltage specifications and package format with 3.3A peak pulse current rating. The operating temperature range extends to 175°C maximum, exceeding the original 150°C specification. The lower temperature limit of -55°C is 10°C higher than the original. Tape and reel packaging is provided. This part is suitable for applications requiring extended high-temperature operation up to 175°C.

Selection among substitute parts depends on specific application requirements regarding minimum operating temperature and peak pulse current capacity.

Frequently Asked Questions (FAQ)

Q: Can SMAJ75A (MDD) be used as a direct replacement for SMAJ75AE3/TR13?

A: SMAJ75A provides electrical equivalence in voltage specifications (75V standoff, 121V clamping) and identical package format (DO-214AC, SMA). The primary difference is the peak pulse current rating of 3.3A versus 4.1A in the original part. This substitute is suitable for applications where peak pulse current does not exceed 3.3A. The operating temperature range of -50 to 150°C is narrower at the lower bound; applications requiring operation below -50°C require the original part or alternative substitutes.

Q: What is the difference between SMAJ75A-13-F and SMAJ75A-TP?

A: Both parts provide identical voltage specifications and 3.3A peak pulse current rating. SMAJ75A-13-F (Diodes Incorporated) operates from -55 to 150°C. SMAJ75A-TP (Micro Commercial Co) operates from -55 to 175°C, providing extended high-temperature capability. Selection depends on whether maximum operating temperature of 175°C is required for the application.

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

A: SMAJ75AE3/TR13 (original), SMAJ75A-13-F, and SMAJ75A-TP are specified with tape and reel (TR) packaging for automated assembly. SMAJ75A (MDD) does not specify packaging format in the provided data. Confirm packaging availability with the supplier when SMAJ75A is selected.

Q: Do all parts meet RoHS3 compliance?

A: All parts listed, including the original SMAJ75AE3/TR13 and all substitutes, are RoHS3 compliant with moisture sensitivity level 1 (unlimited). All parts are suitable for applications requiring RoHS3 certification.

Q: What is the impact of the 3.3A versus 4.1A peak pulse current difference?

A: The substitute parts rated at 3.3A have a peak pulse current capacity 19.5% lower than the original 4.1A specification. In applications where transient pulse currents remain below 3.3A, this difference has no functional impact. Applications requiring peak pulse currents between 3.3A and 4.1A require the original SMAJ75AE3/TR13 or confirmation that the lower rating is acceptable for the specific transient profile.

Q: Can SMAJ75A-TP be used in applications requiring operation below -55°C?

A: No. SMAJ75A-TP is specified for operation from -55 to 175°C. Applications requiring operation below -55°C require the original SMAJ75AE3/TR13 (rated -65 to 150°C) or SMAJ75A (rated -50 to 150°C). Confirm the minimum operating temperature requirement before selecting a substitute part.

Q: Are all parts single-channel unidirectional TVS diodes?

A: Yes. All parts listed, including the original and all substitutes, are single-channel unidirectional Zener-type TVS diodes in DO-214AC (SMA) surface-mount package format.