SMBJ48E3/TR13 Equivalent & Substitute Parts

Part Overview

The SMBJ48E3/TR13 is a 48V transient voltage suppressor (TVS) diode manufactured by Microchip Technology in DO-214AA (SMB) surface mount package. This component is actively produced and designed for general-purpose transient voltage suppression applications. Alternative part sources become necessary to meet supply chain requirements, ensure component availability across multiple vendors, or maintain procurement flexibility in high-volume manufacturing environments.

Substiute Parts

SMBJ48E3/TR13

Microchip TechnologyIn Stock: 1075SMBJ48E3/TR13 Datasheet

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SMBJ48A

MeritekIn Stock: 77463SMBJ48A Datasheet

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SMBJ48A

MeritekIn Stock: 77463SMBJ48A Datasheet

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SMBJ48A

MeritekIn Stock: 77463SMBJ48A Datasheet

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SMBJ48A-13-F

Diodes IncorporatedIn Stock: 6470SMBJ48A-13-F Datasheet

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SMBJ48A-TP

Micro Commercial CoIn Stock: 3872SMBJ48A-TP Datasheet

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SMBJ48A-TR

STMicroelectronicsIn Stock: 1819SMBJ48A-TR Datasheet

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SZ1SMB48AT3G

Littelfuse Inc.In Stock: 2236SZ1SMB48AT3G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ48E3/TR13 are qualified based on the following electrical and mechanical compatibility criteria:

Critical Parameters for Substitution:

• Voltage - Reverse Standoff (Typ): 48V (exact match)
• Voltage - Breakdown (Min): 53.3V (exact match)
• Package / Case: DO-214AA, SMB (exact match)
• Mounting Type: Surface Mount (exact match)
• Type: Zener (exact match)
• Unidirectional Channels: 1 (exact match)

Allowable Parameter Variations:

• Voltage - Clamping (Max) @ Ipp: Range from 77.4V to 85.5V
• Current - Peak Pulse (10/1000µs): Range from 7A to 8.1A
• Operating Temperature: Range from -55°C to -65°C (minimum) and up to 175°C (maximum)
• Manufacturers: Multiple qualified sources (Microchip Technology, Meritek, Diodes Incorporated, Micro Commercial Co, STMicroelectronics, Littelfuse Inc.)

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain active product status with ROHS3 compliance and REACH unaffected classification, consistent with the main SMBJ48E3/TR13 part. The Meritek SMBJ48A option provides the highest peak pulse current rating (7.75A) while maintaining the 48V reverse standoff specification. The Micro Commercial Co SMBJ48A-TP variant supports extended operating temperature range to 175°C. The Littelfuse Inc. SZ1SMB48AT3G carries AEC-Q101 automotive qualification and matches the -65°C lower operating temperature limit of the original part. All substitute parts share identical 48V reverse standoff and 53.3V minimum breakdown voltage specifications, ensuring drop-in replacement compatibility in circuit protection applications.

Frequently Asked Questions (FAQ)

Q: Can any SMBJ48 part be used as a direct substitute for SMBJ48E3/TR13?

A: No. Direct substitutes must maintain the exact 48V reverse standoff voltage and 53.3V minimum breakdown voltage specifications. The SMBJ48A variants from Meritek, Diodes Incorporated, Micro Commercial Co, STMicroelectronics, and Littelfuse Inc. meet these requirements. Other SMBJ48 base number variants with different suffix designations may have different electrical characteristics and are not listed as qualified substitutes.

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

A: The SMBJ48E3/TR13 specifies a maximum clamping voltage of 85.5V at peak pulse current, while all listed substitutes specify 77.4V. Both values are within acceptable transient suppression operating ranges. The lower clamping voltage in substitutes provides more aggressive voltage suppression at the same current level, which may offer improved circuit protection characteristics depending on application requirements.

Q: Are the operating temperature range differences critical for part selection?

A: Operating temperature ranges vary among substitutes: most specify -55°C minimum, while the Microchip original and Littelfuse SZ1SMB48AT3G specify -65°C. For applications operating below -55°C, only the SMBJ48E3/TR13 or SZ1SMB48AT3G are suitable. The Micro Commercial Co SMBJ48A-TP extends to 175°C maximum, offering broader high-temperature performance.

Q: Does packaging format differ among substitute parts?

A: All substitute parts use identical DO-214AA (SMB) surface mount packaging. Packaging designations in supplier device package fields may differ slightly (such as "DO-214AA (SMB)" versus "SMB"), but these represent the same physical package format suitable for automatic assembly and direct PCB mounting compatibility.

Q: What is the difference between the Tape & Reel (TR) and Cut Tape (CT) packaging options?

A: Tape & Reel is suitable for high-volume automated assembly operations. Cut Tape & Digi-Reel provides the component in tape format cut to specific lengths for lower-volume or manual assembly processes. Both formats contain identical electronic components in identical packages; the difference is in packaging and dispensing method only.