SMBJE5-0CAH Equivalent & Substitute Parts

Part Overview

The SMBJE5-0CAH is a bidirectional transient voltage suppressor (TVS) diode manufactured by Eaton - Electronics Division. This surface mount component operates with a 5V reverse standoff voltage and 9.2V maximum clamping voltage, designed for transient protection in telecom applications. The device is housed in a DO-214AA (SMB) package and carries AEC-Q101 automotive qualification. As an active product with established supply availability, equivalent parts may be required for design flexibility, supply chain optimization, or specific application requirements where alternative electrical or mechanical characteristics are acceptable within defined parameters.

Substiute Parts

SMBJE5-0CAH

Eaton - Electronics DivisionIn Stock: 763SMBJE5-0CAH Datasheet

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SM6T6V8AY

STMicroelectronicsIn Stock: 19012SM6T6V8AY Datasheet

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SMBJ5.0CA-Q

Bourns Inc.In Stock: 20051SMBJ5.0CA-Q Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of TVS diodes is determined by electrical parameter compatibility within defined tolerance bands and mechanical interchangeability. The SMBJE5-0CAH establishes the baseline specification for reverse standoff voltage (5V typical), breakdown voltage (6.4V minimum), and clamping voltage (9.2V maximum). Substitute parts must operate within these voltage windows to provide equivalent transient protection without circuit redesign.

Peak pulse current capacity and power dissipation are secondary selection criteria. The main part specifies 65.2A peak pulse current at 10/1000µs pulse width and 600W peak pulse power. Substitute parts with equal or greater current handling capacity and identical power rating maintain functional equivalence.

Package compatibility is mandatory. All substitute parts must use the DO-214AA (SMB) surface mount package to ensure mechanical fit and PCB assembly compatibility without layout modification.

Automotive qualification (AEC-Q101) and operating temperature range (-55°C to 150°C) are compliance requirements that substitute parts must satisfy for applications requiring automotive-grade components.

Key parameters determining substitution eligibility:

• Reverse standoff voltage: 5V ± tolerance
• Breakdown voltage: 6.4V minimum
• Clamping voltage: 9.2V maximum
• Peak pulse current: ≥65.2A
• Peak pulse power: 600W
• Package: DO-214AA (SMB)
• Mounting: Surface Mount
• Temperature range: -55°C to 150°C minimum
• Qualification: AEC-Q101

Parameter Comparison

Engineering Selection Recommendations

SMBJ5.0CA-Q (Bourns Inc.) is the primary equivalent substitute for the SMBJE5-0CAH. This part maintains identical electrical specifications: 5V reverse standoff voltage, 6.4V minimum breakdown voltage, and 9.2V maximum clamping voltage. Peak pulse current (65.3A) and power dissipation (600W) are equivalent within measurement tolerance. Both parts share identical package geometry (DO-214AA/SMB), mounting type (surface mount), operating temperature range (-55°C to 150°C), and automotive qualification (AEC-Q101). The SMBJ5.0CA-Q is RoHS3 compliant and carries REACH Affected status, whereas the main part is REACH Unaffected. This part is suitable for direct substitution in applications where REACH compliance status does not impose restrictions.

SM6T6V8AY (STMicroelectronics) is a secondary substitute with electrical parameter deviations. The reverse standoff voltage is elevated to 5.8V (compared to 5V), and the clamping voltage reaches 13.4V (compared to 9.2V). These higher voltage characteristics result in reduced transient clamping performance relative to the main part. Peak pulse current capacity is significantly higher at 298A (measured at 8/20µs pulse width, differing from the main part's 10/1000µs specification). This part is suitable only for applications where higher clamping voltage and increased current capacity are acceptable or beneficial. The SM6T6V8AY maintains identical package, mounting type, temperature range, and AEC-Q101 qualification. RoHS3 compliance is confirmed.

Both substitute parts are active products with established inventory availability and automotive-grade certification, supporting long-term supply continuity.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ5.0CA-Q (Bourns) be used as a direct replacement for the SMBJE5-0CAH (Eaton)?

A: Yes. The SMBJ5.0CA-Q provides identical electrical performance with matching reverse standoff voltage (5V), breakdown voltage (6.4V minimum), clamping voltage (9.2V maximum), and peak pulse current (65.3A). Both parts use the DO-214AA (SMB) package and share identical operating temperature range and AEC-Q101 qualification. No circuit redesign is required.

Q: What are the limitations of using the SM6T6V8AY (STMicroelectronics) as a substitute?

A: The SM6T6V8AY exhibits higher reverse standoff voltage (5.8V versus 5V) and significantly higher clamping voltage (13.4V versus 9.2V). These characteristics result in delayed transient suppression and higher voltage stress on protected circuits compared to the main part. Peak pulse current is measured at a different pulse width (8/20µs versus 10/1000µs), making direct current comparison imprecise. This part is suitable only for applications where higher clamping voltage is acceptable or where the protected circuit can tolerate increased transient voltage.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All three parts use the DO-214AA (SMB) surface mount package with identical mechanical dimensions and pin configuration. PCB layout and assembly processes require no modification for substitution.

Q: Do the substitute parts meet automotive qualification requirements?

A: Yes. Both SMBJ5.0CA-Q and SM6T6V8AY carry AEC-Q101 automotive qualification and operate across the -55°C to 150°C temperature range, matching the main part's compliance profile.

Q: What is the difference in REACH compliance status between the main part and substitutes?

A: The SMBJE5-0CAH is REACH Unaffected, indicating no restricted substances are present. The SMBJ5.0CA-Q is REACH Affected, requiring compliance verification for applications subject to REACH regulations. The SM6T6V8AY is REACH Unaffected. Application requirements determine whether REACH status impacts part selection.

Q: Can pulse width differences affect substitute part selection?

A: Yes. The main part specifies peak pulse current at 10/1000µs pulse width, while the SM6T6V8AY specifies 8/20µs. These different pulse profiles result in different current ratings that are not directly comparable. The SMBJ5.0CA-Q uses the same 10/1000µs pulse width as the main part, enabling direct current comparison.

Q: What packaging formats are available for these parts?

A: The SMBJE5-0CAH is supplied in Tape & Reel (TR) format. The SM6T6V8AY is available in Cut Tape (CT) and Digi-Reel® format. The SMBJ5.0CA-Q is supplied in Tape & Reel (TR) format. Packaging format selection depends on assembly process requirements and order quantity.