SMBJ20E3/TR13 Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The SMBJ20E3/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 20V reverse standoff voltage and provides 600W peak pulse power dissipation in a DO-214AA (SMB) package format. The part is Active status and RoHS3 compliant, with unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching electrical performance parameters within the allowed tolerance ranges for TVS diode applications, including reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, and power rating. Substitute parts must maintain mechanical compatibility through identical or functionally equivalent packaging specifications.

Substiute Parts

SMBJ20E3/TR13

Microchip TechnologyIn Stock: 876SMBJ20E3/TR13 Datasheet

Current PartRFQ

SMBJ20A

Good-Ark SemiconductorIn Stock: 38643SMBJ20A Datasheet

SimilarRFQ

SMBJ20A

Good-Ark SemiconductorIn Stock: 38643SMBJ20A Datasheet

SimilarRFQ

SMBJ20A

Good-Ark SemiconductorIn Stock: 38643SMBJ20A Datasheet

SimilarRFQ

SMBJ20A-13-F

Diodes IncorporatedIn Stock: 35279SMBJ20A-13-F Datasheet

SimilarRFQ

SMBJ20A-TP

Micro Commercial CoIn Stock: 3850SMBJ20A-TP Datasheet

SimilarRFQ

SMBJ20A-TR

STMicroelectronicsIn Stock: 2880SMBJ20A-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ20E3/TR13 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 20V
• Voltage - Breakdown (Min): 22.2V minimum
• Package / Case: DO-214AA (SMB) surface mount
• Mounting Type: Surface Mount
• Type: Zener unidirectional TVS diode
• Power - Peak Pulse: 600W

Allowable Variation Parameters:

• Voltage - Clamping (Max) @ Ipp: Substitute parts with clamping voltage ≤ 35.8V are acceptable
• Current - Peak Pulse (10/1000µs): Substitute parts with peak pulse current ≥ 16.7A are acceptable
• Operating Temperature Range: Substitute parts with minimum operating temperature ≤ -55°C and maximum ≥ 150°C are acceptable

All identified substitute parts maintain identical reverse standoff voltage (20V), breakdown voltage (22.2V minimum), package format (DO-214AA/SMB), and power rating (600W). Variations in clamping voltage and peak pulse current remain within functional equivalence for general-purpose TVS applications.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain Active product status and full RoHS3 compliance, ensuring continued availability and regulatory conformance. The following factors apply to component selection:

Electrical Performance: All substitute parts operate at the same 20V reverse standoff voltage and 22.2V minimum breakdown voltage as the SMBJ20E3/TR13. Substitute parts exhibit lower clamping voltages (32.4V versus 35.8V), which provides improved transient suppression performance. Peak pulse current ratings in substitute parts (18.5A to 19.4A) exceed the original specification (16.7A), offering enhanced surge handling capability within the same 600W power envelope.

Temperature Operating Range: The SMBJ20E3/TR13 specifies -65°C to 150°C. Substitute parts from Good-Ark, Diodes Incorporated, and STMicroelectronics operate from -55°C to 150°C, representing a 10°C reduction in minimum operating temperature. The Micro Commercial Co variant (SMBJ20A-TP) extends the maximum operating temperature to 175°C, providing additional thermal margin.

Packaging and Mechanical Compatibility: All substitute parts use identical DO-214AA (SMB) surface-mount packaging, ensuring direct PCB footprint compatibility without layout modifications.

Compliance and Certifications: All parts maintain ROHS3 compliance, MSL 1 (unlimited moisture sensitivity), and REACH unaffected status, meeting identical regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can SMBJ20A parts directly replace SMBJ20E3/TR13 in existing designs?

A: Yes. All substitute parts maintain identical reverse standoff voltage (20V), breakdown voltage (22.2V), package format (DO-214AA/SMB), and power rating (600W). Direct PCB footprint compatibility is confirmed. Substitute parts provide equal or superior electrical performance through lower clamping voltages and higher peak pulse current ratings.

Q: What is the significance of the lower clamping voltage in substitute parts?

A: Substitute parts exhibit 32.4V clamping voltage compared to 35.8V in the original SMBJ20E3/TR13. Lower clamping voltage indicates faster transient suppression and reduced voltage overshoot during surge events, representing improved protection performance within the same package and power rating.

Q: Are there temperature range differences between substitute options?

A: Yes. Most substitute parts (Good-Ark SMBJ20A, Diodes SMBJ20A-13-F, STMicroelectronics SMBJ20A-TR) operate from -55°C to 150°C, reducing the minimum operating temperature by 10°C compared to the original -65°C specification. The Micro Commercial Co variant (SMBJ20A-TP) extends maximum operating temperature to 175°C. Selection depends on application thermal requirements.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All identified substitute parts are RoHS3 compliant, carry MSL 1 rating (unlimited moisture sensitivity), and maintain REACH unaffected status, matching the original SMBJ20E3/TR13 compliance profile.

Q: What packaging formats are available for these substitute parts?

A: All substitute parts are supplied in DO-214AA (SMB) surface-mount package format. Packaging options vary by manufacturer and distributor, including Tape & Reel (TR), Cut Tape (CT), and Digi-Reel® formats. Verify specific packaging availability with component suppliers based on procurement requirements.

Q: How do peak pulse current ratings differ among substitute parts?

A: The original SMBJ20E3/TR13 specifies 16.7A peak pulse current. Substitute parts provide 18.5A (Good-Ark, Diodes, MCC) or 19.4A (STMicroelectronics), representing 11% to 16% higher surge current handling within the same 600W power dissipation limit. This provides additional design margin for transient protection.

Q: Are there any restrictions on mixing substitute parts in production?

A: No technical restrictions exist. All substitute parts maintain identical electrical specifications for reverse standoff voltage, breakdown voltage, package format, and power rating. Production changeover between substitute parts requires standard component qualification procedures and documentation updates.