SMAJ14CE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMAJ14CE3/TR13 is a bidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This surface-mount component operates in the DO-214AC (SMA) package and features a 14V reverse standoff voltage with a 25.8V maximum clamping voltage at peak pulse current. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified based on matching electrical characteristics within the SMAJ14 series, including reverse standoff voltage, breakdown voltage, package type, and bidirectional channel configuration. Substitute parts from alternative manufacturers provide functionally equivalent protection performance while maintaining compatibility with existing PCB designs.

Substiute Parts

SMAJ14CE3/TR13

Microchip TechnologyIn Stock: 754SMAJ14CE3/TR13 Datasheet

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SMAJ14CA

Good-Ark SemiconductorIn Stock: 65459SMAJ14CA Datasheet

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SMAJ14CA

Good-Ark SemiconductorIn Stock: 65459SMAJ14CA Datasheet

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SMAJ14CA-13-F

Diodes IncorporatedIn Stock: 5210SMAJ14CA-13-F Datasheet

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SMAJ14CA-E3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 36280SMAJ14CA-E3/61 Datasheet

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SMAJ14CA-TP

Micro Commercial CoIn Stock: 15719SMAJ14CA-TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ14CE3/TR13 are identified within the SMAJ14 series based on the following critical electrical and mechanical parameters:

Matching Criteria:

• Reverse standoff voltage: 14V (typical)
• Breakdown voltage minimum: 15.6V
• Bidirectional channel configuration: 1 channel
• Package type: DO-214AC (SMA) surface mount
• Zener diode type classification
• General-purpose application category
• RoHS3 compliance and MSL 1 rating

Allowable Variations: Substitute parts exhibit lower peak pulse power ratings (400W versus 500W) and reduced peak pulse current (17.2A versus 19.4A), resulting in lower maximum clamping voltages (23.2V versus 25.8V). These substitutes remain functionally equivalent for applications where the lower clamping voltage and power dissipation characteristics are acceptable within system design margins. Operating temperature ranges vary between substitutes, with some supporting extended upper temperature limits.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (SMAJ14CE3/TR13): The Microchip SMAJ14CE3/TR13 offers the highest peak pulse power rating (500W) and peak pulse current (19.4A) within the SMAJ14 series, providing maximum clamping voltage of 25.8V. This part is suitable for applications requiring superior transient energy absorption and lower clamping voltage performance. The extended lower operating temperature limit (-65°C) accommodates demanding environmental conditions.

Substitute Selection (SMAJ14CA - Good-Ark Semiconductor): The Good-Ark SMAJ14CA provides equivalent electrical protection with 400W peak pulse power and 23.2V clamping voltage. This substitute is appropriate for general-purpose applications where the reduced power dissipation and slightly higher clamping voltage are within acceptable design margins. High inventory availability (65,400 units) supports production requirements.

Substitute Selection (SMAJ14CA-13-F - Diodes Incorporated): The Diodes Incorporated SMAJ14CA-13-F matches the electrical characteristics of the Good-Ark substitute with 400W power rating and 23.2V clamping voltage. This option is suitable for applications with standard operating temperature ranges (-55°C to 150°C).

Substitute Selection (SMAJ14CA-E3/61 - Vishay General Semiconductor): The Vishay SMAJ14CA-E3/61 provides equivalent 400W power and 23.2V clamping performance within the TransZorb® product line. This substitute maintains full compliance with RoHS3 and MSL 1 specifications.

Substitute Selection (SMAJ14CA-TP - Micro Commercial Co): The Micro Commercial Co SMAJ14CA-TP offers the widest operating temperature range (-55°C to 175°C ambient), making it suitable for high-temperature applications. This part maintains 400W power and 23.2V clamping voltage specifications.

All substitute parts maintain identical package geometry (DO-214AC/SMA), bidirectional channel configuration, and compliance certifications, ensuring direct PCB compatibility and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can SMAJ14CA substitute parts be used directly in place of SMAJ14CE3/TR13?

A: Yes, SMAJ14CA series parts are direct substitutes from a package and pinout perspective. All substitute parts use the identical DO-214AC (SMA) surface-mount package with the same PCB footprint. However, the reduced peak pulse power (400W versus 500W) and lower peak pulse current (17.2A versus 19.4A) result in higher clamping voltages (23.2V versus 25.8V). Substitution is appropriate when system design margins accommodate the 2.6V increase in maximum clamping voltage.

Q: What is the primary electrical difference between the main part and substitutes?

A: The SMAJ14CE3/TR13 provides 500W peak pulse power with 25.8V maximum clamping voltage, while all SMAJ14CA substitutes provide 400W peak pulse power with 23.2V maximum clamping voltage. Both configurations maintain the same 14V reverse standoff voltage and 15.6V minimum breakdown voltage. The difference reflects the energy absorption capability during transient events.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts (SMAJ14CA, SMAJ14CA-13-F, SMAJ14CA-E3/61, and SMAJ14CA-TP) are RoHS3 compliant with MSL 1 (unlimited) moisture sensitivity rating, matching the compliance profile of the SMAJ14CE3/TR13.

Q: Which substitute part supports the highest operating temperature?

A: The SMAJ14CA-TP from Micro Commercial Co supports the widest operating temperature range, rated to 175°C ambient temperature (TA), compared to 150°C junction temperature (TJ) for other parts. This makes it suitable for high-temperature applications.

Q: Do all parts use the same package footprint?

A: Yes, all parts in this comparison use the DO-214AC (SMA) surface-mount package. PCB footprints are identical, allowing direct component substitution without layout modifications.

Q: What inventory considerations apply to these substitutes?

A: The Good-Ark SMAJ14CA offers the highest inventory availability at 65,400 units. The Vishay SMAJ14CA-E3/61 provides 36,200 units, while the Micro Commercial Co SMAJ14CA-TP offers 15,641 units. The Diodes Incorporated SMAJ14CA-13-F has 5,100 units available. The original Microchip SMAJ14CE3/TR13 has 725 units in stock.

Q: Are there any temperature range limitations when substituting?

A: The original SMAJ14CE3/TR13 supports -65°C to 150°C (junction temperature), while most substitutes support -55°C to 150°C. The SMAJ14CA-TP extends to 175°C ambient. For applications requiring operation below -55°C, the original Microchip part is required.

Q: How do the clamping voltage differences affect circuit protection?

A: The 2.6V difference in maximum clamping voltage (25.8V versus 23.2V) affects the peak voltage that protected circuits experience during transient events. Lower clamping voltage (23.2V) provides tighter voltage regulation but with reduced energy absorption capacity. System design margins must accommodate this difference.