SMAJ54AE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMAJ54AE3/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 54V reverse standoff voltage range with a maximum clamping voltage of 87.1V and peak pulse current rating of 5.7A. The device is packaged in DO-214AC (SMA) format and supplied on tape and reel. With active product status and full RoHS3 compliance, the SMAJ54AE3/TR13 serves as a primary component for transient suppression in electronic circuits. Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational parameters that ensure functional interchangeability within specified design constraints.

Substiute Parts

SMAJ54AE3/TR13

Microchip TechnologyIn Stock: 1066SMAJ54AE3/TR13 Datasheet

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SMAJ54A

MDDIn Stock: 3070SMAJ54A Datasheet

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SMAJ54A

MDDIn Stock: 3070SMAJ54A Datasheet

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SMAJ54A-13-F

Diodes IncorporatedIn Stock: 34486SMAJ54A-13-F Datasheet

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SMAJ54A-TP

Micro Commercial CoIn Stock: 7421SMAJ54A-TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ54AE3/TR13 are qualified based on the following critical electrical and mechanical parameters:

Voltage Parameters: All substitute parts maintain identical reverse standoff voltage (54V typical), breakdown voltage minimum (60V), and clamping voltage maximum (87.1V). These parameters ensure equivalent transient suppression performance at the circuit protection point.

Current and Power Ratings: Substitute parts are grouped into two categories based on peak pulse current capacity. The primary substitutes (SMAJ54A variants) operate at 4.6A peak pulse current with 400W peak pulse power, representing a reduction from the main part's 5.7A and 500W ratings. This reduction is acceptable in applications where the circuit transient energy does not exceed the substitute part's thermal and current dissipation limits.

Package and Mounting: All substitute parts utilize the DO-214AC (SMA) surface-mount package, ensuring mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Temperature Range: Operating temperature ranges vary across substitutes (−50°C to 150°C, −55°C to 150°C, and −55°C to 175°C), with all ranges encompassing or exceeding the main part's −65°C to 150°C specification for the upper temperature limit. Lower temperature minimums in some substitutes do not affect functionality in standard industrial applications.

Compliance and Status: All substitute parts maintain active product status, RoHS3 compliance, MSL Level 1 rating, and REACH unaffected status, ensuring regulatory and supply chain compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitution Criteria: All listed substitute parts maintain electrical equivalence in voltage suppression performance through identical reverse standoff, breakdown, and clamping voltage specifications. Selection among substitutes is determined by application-specific current and power dissipation requirements, inventory availability, and manufacturing lead times.

Current and Power Derating: Applications utilizing the SMAJ54AE3/TR13 with peak transient currents exceeding 4.6A or requiring sustained power dissipation above 400W must retain the main part number. Designs operating within the 4.6A and 400W envelope are compatible with all substitute parts.

Temperature Considerations: The SMAJ54A-TP variant from Micro Commercial Co extends the upper operating temperature to 175°C (ambient), providing enhanced thermal margin for high-temperature environments. The SMAJ54A from MDD operates to 150°C junction temperature with a lower minimum of −50°C, suitable for standard industrial temperature ranges. The SMAJ54A-13-F from Diodes Incorporated operates from −55°C to 150°C, offering extended low-temperature performance.

Compliance and Supply Chain: All substitute parts maintain full RoHS3 compliance, REACH unaffected status, and MSL Level 1 moisture sensitivity rating, ensuring regulatory alignment and simplified supply chain management. Active product status across all variants ensures long-term availability and manufacturing support.

Packaging and Assembly: All substitute parts are supplied in DO-214AC (SMA) surface-mount packages with identical footprints and land patterns. The SMAJ54A-13-F and SMAJ54A-TP are supplied on tape and reel, matching the main part's packaging format. The MDD SMAJ54A variant does not specify packaging format but maintains mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can SMAJ54A variants be used as direct replacements for SMAJ54AE3/TR13 in all applications?

A: SMAJ54A variants are functionally equivalent for transient suppression in applications where peak pulse current does not exceed 4.6A and peak pulse power remains below 400W. The identical voltage specifications (54V standoff, 87.1V clamping) ensure equivalent protection performance. Applications requiring the full 5.7A current capacity must use the SMAJ54AE3/TR13.

Q: What is the impact of the reduced current rating (4.6A vs. 5.7A) on circuit protection?

A: The current rating determines the maximum transient energy the device can safely dissipate without thermal damage. A 4.6A-rated device handles transient pulses with lower peak current amplitude. Circuit designs must be evaluated to confirm that transient events do not exceed the substitute part's current and power specifications. Voltage clamping performance remains identical across all parts.

Q: Are there temperature range differences that affect substitute part selection?

A: Operating temperature ranges vary among substitutes. The SMAJ54A-TP extends to 175°C ambient temperature, providing additional thermal margin for high-temperature applications. The SMAJ54A from MDD operates to 150°C junction temperature with a −50°C minimum. The SMAJ54A-13-F operates from −55°C to 150°C. Standard industrial applications operating within −40°C to 85°C ambient temperature are compatible with all variants.

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

A: Yes, all substitute parts utilize the DO-214AC (SMA) surface-mount package, ensuring identical PCB footprints, land patterns, and assembly compatibility. The SMAJ54A-13-F and SMAJ54A-TP are supplied on tape and reel, matching the main part's packaging format. The MDD SMAJ54A does not specify packaging format but maintains mechanical compatibility.

Q: What compliance certifications apply to substitute parts?

A: All substitute parts maintain RoHS3 compliance, REACH unaffected status, and MSL Level 1 (unlimited moisture sensitivity) rating. These certifications ensure regulatory alignment with environmental and hazardous substance directives and simplified handling during assembly and storage.

Q: How do I determine which substitute part is appropriate for my design?

A: Evaluate your circuit's peak transient current and power dissipation requirements. If these remain within 4.6A and 400W, any substitute part is electrically compatible. For temperature-critical applications, select the variant with the appropriate operating range. For supply chain optimization, SMAJ54A-13-F from Diodes Incorporated offers the highest inventory availability (34,465 units).

Q: Are there any electrical performance differences between manufacturers?

A: All substitute parts maintain identical voltage specifications (54V standoff, 60V breakdown minimum, 87.1V clamping maximum), ensuring equivalent transient suppression performance. Differences exist only in current capacity (4.6A vs. 5.7A), temperature range, and manufacturing source. Electrical performance in the voltage domain is equivalent across all parts.