SMAJ48CE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMAJ48CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This bidirectional zener diode operates with a 48V reverse standoff voltage and provides clamping at 85.5V maximum, with a peak pulse current rating of 5.8A. The device is housed in a DO-214AC (SMA) surface mount package and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

The SMAJ48CE3/TR13 maintains active product status. Equivalent and substitute parts are identified based on matching electrical characteristics within the 48V reverse standoff voltage class, compatible package specifications, and compliance certifications. Substitute parts enable design flexibility, supply chain alternatives, and procurement optimization while maintaining functional equivalence in circuit protection applications.

Substiute Parts

SMAJ48CE3/TR13

Microchip TechnologyIn Stock: 737SMAJ48CE3/TR13 Datasheet

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SM4T56CAY

STMicroelectronicsIn Stock: 1636SM4T56CAY Datasheet

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SMA6J48CA-TR

STMicroelectronicsIn Stock: 5863SMA6J48CA-TR Datasheet

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SMAJ48CA

MDDIn Stock: 9752SMAJ48CA Datasheet

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SMAJ48CA

MDDIn Stock: 9752SMAJ48CA Datasheet

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SMAJ48CA-13-F

Diodes IncorporatedIn Stock: 284792SMAJ48CA-13-F Datasheet

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SMAJ48CA-TP

Micro Commercial CoIn Stock: 5098SMAJ48CA-TP Datasheet

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SMAJ48CA-TR

STMicroelectronicsIn Stock: 4072SMAJ48CA-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ48CE3/TR13 are qualified based on the following criteria:

Primary Matching Parameters:

• Voltage - Reverse Standoff (Typ): 48V
• Voltage - Breakdown (Min): 53.3V
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Type: Zener
• Bidirectional Channels: 1
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Secondary Compatibility Factors:

• Voltage - Clamping (Max) @ Ipp: Range 77.4V to 100V (acceptable variation within protection circuit design margins)
• Current - Peak Pulse: Range 5.2A to 40A (higher ratings provide enhanced protection capability)
• Power - Peak Pulse: Range 400W to 600W (higher ratings provide enhanced dissipation capability)
• Operating Temperature Range: Minimum -55°C to maximum 175°C (encompasses or exceeds primary part range)

All substitute parts maintain identical electrical class (48V standoff), package form factor, and compliance certifications. Variations in clamping voltage, peak current, and power dissipation represent functional enhancements or alternative manufacturer specifications within the same protection class.

Parameter Comparison

Engineering Selection Recommendations

Direct Electrical Equivalents (Closest Match):

SMAJ48CA-13-F (Diodes Incorporated) and SMAJ48CA-TP (Micro Commercial Co) provide the closest electrical equivalence to the SMAJ48CE3/TR13. Both parts maintain identical reverse standoff voltage (48V), breakdown voltage (53.3V), peak pulse current (5.2A), and power dissipation (400W). These parts are suitable for direct substitution in applications where the primary part is unavailable. Both are RoHS3 compliant with MSL 1 rating.

Enhanced Protection Alternatives:

SMA6J48CA-TR (STMicroelectronics) offers enhanced protection capability with 40A peak pulse current and 600W power dissipation, compared to the primary part's 5.8A and 500W. This part maintains the 48V standoff class and DO-214AC package, with extended operating temperature range (-55 to 175°C). Selection of this part is appropriate for applications requiring higher transient energy absorption.

SMAJ48CA-TR (STMicroelectronics) provides 23A peak pulse current and 100V clamping voltage, offering intermediate protection enhancement. This part is suitable for applications where higher current handling is beneficial within the 48V protection class.

Lower-Performance Alternative:

SMAJ48CA (MDD) provides equivalent electrical performance to SMAJ48CA-13-F and SMAJ48CA-TP, with identical 5.2A peak pulse current and 77.4V clamping voltage. Operating temperature range is -50 to 150°C, which is narrower than the primary part. This part is suitable for applications with standard temperature requirements.

Automotive-Grade Option:

SM4T56CAY (STMicroelectronics) is qualified to AEC-Q101 automotive standard and carries automotive grade designation. This part provides 23A peak pulse current and 100V clamping voltage within the 48V standoff class. Selection is appropriate for automotive applications requiring automotive-grade component certification.

All substitute parts maintain RoHS3 compliance and MSL 1 moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage practices.

Frequently Asked Questions (FAQ)

Q: Can SMAJ48CA-13-F be used as a direct replacement for SMAJ48CE3/TR13?

A: Yes. Both parts share identical reverse standoff voltage (48V), breakdown voltage (53.3V), peak pulse current (5.2A), and power dissipation (400W). Both are housed in DO-214AC (SMA) packages and are RoHS3 compliant with MSL 1 rating. The primary difference is manufacturer (Diodes Incorporated versus Microchip Technology). Operating temperature range for SMAJ48CA-13-F is -55 to 150°C, which encompasses the primary part's -65 to 150°C range at the upper end.

Q: What is the difference between SMAJ48CA-TP and SMAJ48CA-13-F?

A: Both parts provide identical electrical specifications: 48V reverse standoff, 53.3V breakdown, 77.4V clamping, 5.2A peak pulse current, and 400W power dissipation. SMAJ48CA-TP is manufactured by Micro Commercial Co with operating temperature -55 to 175°C. SMAJ48CA-13-F is manufactured by Diodes Incorporated with operating temperature -55 to 150°C. SMAJ48CA-TP offers extended high-temperature operation to 175°C. Both are packaged in DO-214AC (SMA) and are RoHS3 compliant.

Q: When should SMA6J48CA-TR be selected instead of the primary part?

A: SMA6J48CA-TR is selected when circuit protection requirements demand higher transient energy absorption. This part provides 40A peak pulse current and 600W power dissipation, compared to the primary part's 5.8A and 500W. Both maintain 48V reverse standoff voltage and DO-214AC package compatibility. SMA6J48CA-TR is appropriate for applications experiencing higher-magnitude transient events or requiring enhanced protection margin.

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

A: Yes. All substitute parts are housed in DO-214AC (SMA) surface mount packages. PCB footprints are identical across all listed parts. No layout modifications are required for substitution.

Q: What is the significance of the 8/20µs pulse specification on some parts?

A: The 8/20µs notation indicates the waveform shape used for peak pulse current measurement. Parts specified with 10/1000µs (primary part) and parts specified with 8/20µs (some substitutes) use different standard test waveforms. Both waveforms are industry-standard test conditions. The 8/20µs waveform represents a faster transient event. Parts rated for 8/20µs conditions typically demonstrate higher peak current capability under this faster pulse shape.

Q: Is SM4T56CAY suitable for non-automotive applications?

A: Yes. SM4T56CAY is qualified to AEC-Q101 automotive standard, but this qualification does not restrict use in non-automotive applications. The part provides 48V reverse standoff voltage, 100V clamping, 23A peak pulse current, and 400W power dissipation in DO-214AC package. It is RoHS3 compliant and suitable for any general-purpose transient voltage suppression application within the 48V protection class.

Q: What is the minimum operating temperature difference between the primary part and substitutes?

A: The primary part SMAJ48CE3/TR13 operates from -65°C to 150°C. Most substitute parts operate from -55°C minimum, representing a 10°C difference at the lower end. SMAJ48CA (MDD) operates from -50°C minimum, representing a 15°C difference. For applications requiring operation below -55°C, the primary part or SMAJ48CA-13-F (which matches the -65°C lower limit) should be selected. For standard industrial applications, the -55°C minimum of most substitutes is acceptable.

Q: Can higher-rated parts (SMA6J48CA-TR, SM4T56CAY, SMAJ48CA-TR) be used in place of lower-rated parts?

A: Yes. Higher peak pulse current and power dissipation ratings represent enhanced protection capability. Parts with 23A or 40A peak pulse current can be substituted for the primary part's 5.8A rating. The 48V reverse standoff voltage class remains identical, ensuring proper circuit protection threshold. Higher-rated parts provide additional transient energy absorption margin and are suitable for applications where enhanced protection is beneficial or required.

Q: Are all substitute parts available in tape and reel packaging?

A: Packaging availability varies by manufacturer and part number. SMAJ48CA-TP is specified as Tape & Reel (TR). SMA6J48CA-TR and SMAJ48CA-TR are specified as Cut Tape (CT) & Digi-Reel®. SMAJ48CA-13-F is specified as Cut Tape (CT) & Digi-Reel®. SMAJ48CA (MDD) packaging is not specified in the provided data. Verify packaging availability with component suppliers for specific procurement requirements.