SMAJ13E3/TR13 Equivalent & Substitute Parts

Part Overview

The SMAJ13E3/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 13V reverse standoff voltage class and features a 23.8V maximum clamping voltage with 21A peak pulse current capability. The part is actively produced and RoHS3 compliant with unlimited moisture sensitivity rating.

Substitute parts are identified based on matching electrical performance parameters within the 13V standoff voltage class and compatible DO-214AC (SMA) surface-mount packaging. Equivalent devices maintain core protection characteristics while offering alternative sourcing options from different manufacturers.

Substiute Parts

SMAJ13E3/TR13

Microchip TechnologyIn Stock: 1083SMAJ13E3/TR13 Datasheet

Current PartRFQ

SM4T15AY

STMicroelectronicsIn Stock: 6372SM4T15AY Datasheet

SimilarRFQ

SMA6J13A-TR

STMicroelectronicsIn Stock: 6272SMA6J13A-TR Datasheet

SimilarRFQ

SMAJ13A

MDDIn Stock: 40231SMAJ13A Datasheet

SimilarRFQ

SMAJ13A

MDDIn Stock: 40231SMAJ13A Datasheet

SimilarRFQ

SMAJ13A-13-F

Diodes IncorporatedIn Stock: 19975SMAJ13A-13-F Datasheet

SimilarRFQ

SMAJ13A-TP

Micro Commercial CoIn Stock: 5309SMAJ13A-TP Datasheet

SimilarRFQ

SMAJ13A-TR

STMicroelectronicsIn Stock: 2383SMAJ13A-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMAJ13E3/TR13 is determined by the following critical parameters:

Primary Matching Criteria:

• Voltage - Reverse Standoff (Typ): 13V
• Voltage - Breakdown (Min): 14.4V
• Package / Case: DO-214AC, SMA
• Type: Zener, Unidirectional
• Unidirectional Channels: 1

Secondary Compatibility Parameters:

• Voltage - Clamping (Max) @ Ipp: 21.5V to 27.2V (acceptable range for 13V class devices)
• Current - Peak Pulse: 18.6A to 147A (dependent on application requirements)
• Operating Temperature Range: -55°C to 175°C (must encompass or match application needs)
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

All identified substitute parts maintain the 13V standoff voltage specification and DO-214AC surface-mount package format, ensuring mechanical and electrical compatibility within the 13V TVS diode classification.

Parameter Comparison

Engineering Selection Recommendations

Direct Electrical Equivalents (Closest Match):

The SMAJ13A series from multiple manufacturers (MDD, Diodes Incorporated, Micro Commercial Co) provides the closest electrical equivalence to the SMAJ13E3/TR13. These parts maintain identical standoff voltage (13V), breakdown voltage (14.4V), and nearly identical clamping voltage (21.5V vs. 23.8V). Peak pulse current specifications are comparable at 18.6A, making these suitable for applications with similar transient energy requirements.

Higher Performance Alternatives:

The STMicroelectronics SMAJ13A-TR and SM4T15AY offer increased peak pulse current handling (85A at 8/20µs pulse) and higher clamping voltage (27.2V), providing enhanced protection margin for applications requiring greater transient suppression capability. The SMA6J13A-TR from STMicroelectronics delivers the highest peak pulse current (147A) and power dissipation (600W), suitable for high-energy transient environments.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), ensuring regulatory compatibility. The SMAJ13A-TP variant from Micro Commercial Co extends the operating temperature range to -55°C to 175°C, providing thermal margin for elevated ambient or junction temperature applications.

Packaging Considerations:

All identified substitutes are available in DO-214AC (SMA) surface-mount packaging. Tape & Reel (TR) packaging is available for SMAJ13E3/TR13, SMA6J13A-TR, SMAJ13A-TP, and SMAJ13A-TR. Cut Tape (CT) & Digi-Reel® packaging is available for SMAJ13A-13-F and SMAJ13A-TR, providing flexibility for different procurement and assembly workflows.

Frequently Asked Questions (FAQ)

Q: Can I substitute the SMAJ13E3/TR13 with any 13V TVS diode?

A: No. Substitution requires matching the 13V reverse standoff voltage, 14.4V minimum breakdown voltage, and DO-214AC (SMA) surface-mount package. Additionally, the clamping voltage and peak pulse current must be compatible with the application's transient energy profile and circuit protection requirements.

Q: What is the difference between the SMAJ13A variants from different manufacturers?

A: The SMAJ13A part number is produced by MDD, Diodes Incorporated, and Micro Commercial Co. All three maintain identical electrical specifications (13V standoff, 21.5V clamping, 18.6A peak pulse). Differences exist in operating temperature ranges: MDD operates -50°C to 150°C, Diodes Incorporated operates -55°C to 150°C, and Micro Commercial Co operates -55°C to 175°C. Selection depends on thermal requirements and packaging availability.

Q: Why do some substitute parts show higher peak pulse current ratings?

A: The STMicroelectronics SM4T15AY, SMAJ13A-TR, and SMA6J13A-TR employ different internal die designs and thermal management, enabling higher peak pulse current handling (85A to 147A) compared to the SMAJ13E3/TR13 (21A). These parts are suitable for applications with higher transient energy levels while maintaining the same 13V standoff voltage class.

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

A: No. Tape & Reel (TR) packaging is available for SMAJ13E3/TR13, SMA6J13A-TR, SMAJ13A-TP, and SMAJ13A-TR. The SMAJ13A from MDD does not specify packaging type. SMAJ13A-13-F from Diodes Incorporated is available in Cut Tape (CT) & Digi-Reel® format. Verify packaging availability with your supplier for production requirements.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All identified substitute parts are RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1), matching the compliance profile of the SMAJ13E3/TR13.

Q: What is the difference between the 10/1000µs and 8/20µs pulse specifications?

A: The SMAJ13E3/TR13 specifies peak pulse current at 10/1000µs pulse duration, while some STMicroelectronics substitutes specify 8/20µs pulse duration. These represent different test waveforms for transient characterization. The 8/20µs waveform is commonly used for lightning and surge testing, while 10/1000µs represents ESD-type transients. Both specifications are valid for their respective application domains.

Q: Can I use the SMA6J13A-TR as a direct replacement for the SMAJ13E3/TR13?

A: The SMA6J13A-TR is electrically compatible with matching 13V standoff voltage and DO-214AC packaging. However, it features higher peak pulse current (147A vs. 21A) and power dissipation (600W vs. 500W), making it suitable for higher-energy transient environments. The extended operating temperature range (-55°C to 175°C) provides additional thermal margin. Verify that the higher performance specifications do not introduce unintended circuit behavior in your application.