SMBJ40CE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMBJ40CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional zener diode operates with a 40V reverse standoff voltage and provides clamping at 71.4V maximum, with a peak pulse current rating of 8.4A. The component is housed in a DO-214AA (SMB) package and is supplied in Tape & Reel (TR) packaging format.

The product maintains Active status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified based on matching electrical parameters—specifically reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, and power dissipation—combined with compatible surface-mount packaging and operating temperature ranges suitable for general-purpose transient suppression applications.

Substiute Parts

SMBJ40CE3/TR13

Microchip TechnologyIn Stock: 1086SMBJ40CE3/TR13 Datasheet

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SM6T47CAY

STMicroelectronicsIn Stock: 855399SM6T47CAY Datasheet

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SMBJ40CA

MDDIn Stock: 10276SMBJ40CA Datasheet

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SMBJ40CA

MDDIn Stock: 10276SMBJ40CA Datasheet

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SMBJ40CA

MDDIn Stock: 10276SMBJ40CA Datasheet

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SMBJ40CA-13-F

Diodes IncorporatedIn Stock: 10335SMBJ40CA-13-F Datasheet

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SMBJ40CA-TR

STMicroelectronicsIn Stock: 40382SMBJ40CA-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ40CE3/TR13 are qualified based on the following electrical and mechanical criteria:

Primary Matching Criteria:

• Reverse standoff voltage: 40V (typical)
• Breakdown voltage minimum: 44.4V
• Package type: DO-214AA / SMB surface mount
• Bidirectional zener diode configuration
• Peak pulse power rating: 600W
• Moisture sensitivity level: 1 (unlimited)
• RoHS3 compliance status

Secondary Compatibility Factors:

• Clamping voltage tolerance (acceptable range: 64.5V to 84V maximum)
• Peak pulse current capability (acceptable range: 8.4A to 48A)
• Operating temperature range (minimum -55°C to maximum 150°C)
• Product status: Active

Substitutes are grouped into two categories based on clamping voltage performance:

Group A (Lower Clamping Voltage): Parts with 64.5V clamping voltage and 9.3A to 9.7A peak pulse current. These provide tighter voltage regulation compared to the main part.

Group B (Higher Clamping Voltage): Parts with 84V clamping voltage and higher peak pulse current capability (48A). These offer enhanced transient suppression capacity.

Parameter Comparison

Engineering Selection Recommendations

SMBJ40CA-TR (STMicroelectronics)

This substitute provides the closest electrical performance match to the SMBJ40CE3/TR13. The clamping voltage of 64.5V is lower than the main part, resulting in tighter voltage regulation. Peak pulse current of 9.7A exceeds the main part specification of 8.4A, providing additional transient suppression margin. Operating temperature range extends to -55°C minimum, meeting the main part's thermal requirements. The part carries ROHS3 compliance and maintains the same DO-214AA package format. STMicroelectronics TRANSIL™ series designation indicates automotive-grade qualification under AEC-Q101 standards.

SMBJ40CA-13-F (Diodes Incorporated)

This substitute offers equivalent electrical characteristics with 64.5V clamping voltage and 9.3A peak pulse current. Operating temperature range of -55°C to 150°C aligns with extended temperature applications. The part is supplied in Cut Tape & Digi-Reel® packaging and maintains full RoHS3 compliance. Diodes Incorporated SMBJ series designation confirms active product status and general-purpose application suitability.

SMBJ40CA (MDD)

This substitute provides 64.5V clamping voltage with 9.3A peak pulse current capability. Operating temperature range of -50°C to 150°C covers standard industrial applications. The part maintains RoHS3 compliance and DO-214AA package compatibility. MDD SMB series designation confirms active product status.

SM6T47CAY (STMicroelectronics)

This substitute offers enhanced transient suppression with 84V clamping voltage and 48A peak pulse current capability (8/20µs pulse definition). The higher current rating accommodates applications requiring greater transient energy absorption. Operating temperature range of -55°C to 150°C meets thermal requirements. STMicroelectronics TRANSIL™ series carries AEC-Q101 automotive qualification. This substitute is suitable for applications requiring higher transient current handling capacity than the main part specification.

Frequently Asked Questions (FAQ)

Q: Can SMBJ40CA-TR be used as a direct replacement for SMBJ40CE3/TR13?

A: Yes. Both parts share identical reverse standoff voltage (40V), breakdown voltage (44.4V), and DO-214AA package format. The SMBJ40CA-TR provides lower clamping voltage (64.5V vs. 71.4V) and higher peak pulse current (9.7A vs. 8.4A), resulting in improved voltage regulation and transient suppression margin. Operating temperature range (-55°C to 150°C) covers the main part's specification.

Q: What is the difference between the clamping voltage specifications?

A: Clamping voltage determines the maximum voltage level the TVS diode allows across its terminals during a transient event. The main part clamps at 71.4V maximum. Substitute parts with 64.5V clamping voltage provide tighter voltage regulation, limiting transient overshoot to lower levels. The SM6T47CAY with 84V clamping voltage allows higher voltage transients to pass through, suitable for applications with higher voltage tolerance.

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

A: The SMBJ40CA-TR and SMBJ40CA-13-F are supplied in Cut Tape & Digi-Reel® packaging. The MDD SMBJ40CA does not specify packaging format in the provided data. For applications requiring Tape & Reel format specifically, SMBJ40CA-TR is the recommended substitute.

Q: Does operating temperature range affect substitution suitability?

A: The main part operates from -65°C to 150°C. All substitute parts operate within -50°C to -55°C minimum to 150°C maximum range. For applications requiring operation below -55°C, the main part SMBJ40CE3/TR13 provides extended low-temperature capability. For standard industrial applications (-40°C to 85°C ambient), all substitutes are suitable.

Q: What is the significance of the AEC-Q101 qualification on SM6T47CAY?

A: AEC-Q101 is an automotive electronics qualification standard. The SM6T47CAY carries this certification, indicating suitability for automotive and high-reliability applications. The main part and other substitutes do not specify automotive qualification but maintain RoHS3 compliance for general industrial use.

Q: Can peak pulse current ratings be compared directly across different pulse definitions?

A: Peak pulse current specifications use different pulse waveform definitions. The main part and most substitutes use 10/1000µs pulse definition. The SM6T47CAY uses 8/20µs pulse definition, which represents a different transient event profile. Direct numerical comparison is not applicable; the 48A rating under 8/20µs definition does not directly equate to the 8.4A rating under 10/1000µs definition. Selection should be based on the specific transient waveform present in the application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance status. All parts also maintain REACH Unaffected status and unlimited moisture sensitivity level (MSL 1), matching the main part's environmental and regulatory compliance profile.