SMAJ36AE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMAJ36AE3/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 operates with a 36V reverse standoff voltage and provides clamping at 58.1V maximum, with a peak pulse current rating of 8.6A. The part is currently in active production status and is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational parameters that ensure functional interchangeability within the same circuit protection application.

Substiute Parts

SMAJ36AE3/TR13

Microchip TechnologyIn Stock: 850SMAJ36AE3/TR13 Datasheet

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SMAJ36A

MDDIn Stock: 7893SMAJ36A Datasheet

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SMAJ36A

MDDIn Stock: 7893SMAJ36A Datasheet

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SMAJ36A-13-F

Diodes IncorporatedIn Stock: 15251SMAJ36A-13-F Datasheet

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SMAJ36A-TP

Micro Commercial CoIn Stock: 4588SMAJ36A-TP Datasheet

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SZ1SMA36AT3G

Littelfuse Inc.In Stock: 9055SZ1SMA36AT3G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ36AE3/TR13 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Reverse Standoff: 36V (typical)
• Voltage - Clamping (Max) @ Ipp: 58.1V
• Package / Case: DO-214AC, SMA (surface mount)
• Unidirectional configuration with single channel
• Zener diode type
• RoHS3 compliance
• MSL 1 rating

Acceptable Variation Parameters:

• Current - Peak Pulse (10/1000µs): Substitute parts rated at 6.9A are acceptable as they represent a lower current rating within the same protection class
• Power - Peak Pulse: Substitute parts rated at 400W are acceptable as they represent a lower power dissipation rating
• Operating Temperature Range: Substitute parts with operating ranges of -50°C to 150°C, -55°C to 150°C, or -55°C to 175°C are acceptable as they encompass or overlap the primary part's range

All substitute parts maintain identical voltage characteristics (36V standoff, 40V breakdown minimum, 58.1V clamping maximum) and package compatibility, ensuring direct functional substitution in circuit protection applications.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active production status and full RoHS3 compliance, ensuring regulatory alignment with the primary SMAJ36AE3/TR13 component.

Microchip Technology SMAJ36AE3/TR13 is the primary reference part with the highest peak pulse current rating (8.6A) and peak pulse power rating (500W), providing maximum transient protection margin. This part operates across the full temperature range of -65°C to 150°C (junction temperature).

MDD SMAJ36A offers equivalent voltage protection characteristics with reduced current and power ratings (6.9A, 400W). Operating temperature range is -50°C to 150°C (junction temperature), which is acceptable for applications not requiring sub-50°C operation.

Diodes Incorporated SMAJ36A-13-F provides equivalent voltage protection with reduced current and power ratings (6.9A, 400W). Operating temperature range is -55°C to 150°C (junction temperature), extending lower temperature operation to -55°C. This part is supplied in Tape & Reel packaging.

Micro Commercial Co SMAJ36A-TP provides equivalent voltage protection with reduced current and power ratings (6.9A, 400W). Operating temperature range extends to -55°C to 175°C (ambient temperature), offering the widest high-temperature operation. This part is supplied in Tape & Reel packaging.

Littelfuse Inc. SZ1SMA36AT3G provides equivalent voltage protection with reduced current and power ratings (6.9A, 400W). This part operates across -65°C to 150°C (junction temperature), matching the primary part's temperature range. The SZ1SMA series carries AEC-Q101 automotive qualification and includes capacitance specification (345pF @ 1MHz). This part is supplied in Tape & Reel packaging.

Selection between substitute parts depends on application-specific requirements for peak pulse current capacity, operating temperature range, and automotive qualification status.

Frequently Asked Questions (FAQ)

Q: Can SMAJ36A (MDD) directly replace SMAJ36AE3/TR13 in all applications?

A: SMAJ36A (MDD) is electrically compatible for voltage protection functions, maintaining identical standoff voltage (36V), breakdown voltage (40V minimum), and clamping voltage (58.1V maximum). However, the reduced peak pulse current rating (6.9A versus 8.6A) and power rating (400W versus 500W) mean it provides lower transient energy absorption capacity. Applications requiring the full 8.6A peak pulse current capability must use the primary part or equivalent high-current-rated alternatives.

Q: What is the difference between SMAJ36A-13-F and SMAJ36A-TP?

A: Both parts provide identical voltage protection characteristics (36V standoff, 58.1V clamping) and reduced current/power ratings (6.9A, 400W). The primary difference is operating temperature range: SMAJ36A-13-F operates from -55°C to 150°C (junction temperature), while SMAJ36A-TP operates from -55°C to 175°C (ambient temperature). SMAJ36A-TP offers extended high-temperature operation suitable for applications in elevated thermal environments.

Q: Is SZ1SMA36AT3G suitable for automotive applications?

A: SZ1SMA36AT3G carries AEC-Q101 automotive qualification and is designated as an automotive-grade component. It provides equivalent voltage protection to the primary part (36V standoff, 58.1V clamping) with reduced current/power ratings (6.9A, 400W). Applications requiring automotive-qualified TVS diodes can use this part as a substitute.

Q: Are all substitute parts available in Tape & Reel packaging?

A: SMAJ36A (MDD) does not specify packaging format in the provided data. SMAJ36A-13-F (Diodes Incorporated), SMAJ36A-TP (Micro Commercial Co), and SZ1SMA36AT3G (Littelfuse) are all supplied in Tape & Reel (TR) packaging, matching the primary part's packaging format.

Q: What is the significance of the capacitance specification in SZ1SMA36AT3G?

A: SZ1SMA36AT3G includes a capacitance specification of 345pF @ 1MHz. This parameter is not provided for other substitute parts. Capacitance affects high-frequency transient response characteristics. Applications with specific high-frequency transient requirements should evaluate this specification against circuit design parameters.

Q: Can substitute parts with lower peak pulse current ratings be used in designs originally specified for SMAJ36AE3/TR13?

A: Substitute parts with 6.9A peak pulse current ratings (versus 8.6A for the primary part) are acceptable only if the application's actual transient current does not exceed 6.9A. Circuit analysis must confirm that peak transient currents remain within the substitute part's rating. If transient currents exceed 6.9A, the primary part or equivalent high-current-rated alternatives must be used.

Q: Do all substitute parts meet RoHS3 compliance?

A: All identified substitute parts are RoHS3 compliant with MSL 1 (unlimited moisture sensitivity rating), matching the primary part's regulatory status. All parts are also REACH unaffected and classified as EAR99 for export control purposes.