SMBJ33CE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMBJ33CE3/TR13 is a bidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a 33V reverse standoff voltage and provides clamping at 59V maximum, with a peak pulse current rating of 10.2A. The part is active in production status and compliant with RoHS3 and REACH regulations.

Equivalent and substitute parts are identified based on matching electrical characteristics including reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, power dissipation, and package compatibility. Substitutes enable design flexibility, support supply chain continuity, and provide alternative sourcing options while maintaining circuit performance within specified parameters.

Substiute Parts

SMBJ33CE3/TR13

Microchip TechnologyIn Stock: 1101SMBJ33CE3/TR13 Datasheet

Current PartRFQ

SMBJ33CA

MDDIn Stock: 25872SMBJ33CA Datasheet

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SMBJ33CA

MDDIn Stock: 25872SMBJ33CA Datasheet

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SMBJ33CA

MDDIn Stock: 25872SMBJ33CA Datasheet

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SMBJ33CA-13-F

Diodes IncorporatedIn Stock: 35348SMBJ33CA-13-F Datasheet

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SMBJ33CA-TP

Micro Commercial CoIn Stock: 15959SMBJ33CA-TP Datasheet

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SZ1SMB33CAT3G

Littelfuse Inc.In Stock: 107791SZ1SMB33CAT3G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ33CE3/TR13 are qualified based on the following electrical and mechanical parameters:

Primary Matching Criteria:

• Voltage - Reverse Standoff (Typ): 33V
• Voltage - Breakdown (Min): 36.7V
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Bidirectional Channels: 1
• Type: Zener

Secondary Compatibility Parameters:

• Voltage - Clamping (Max) @ Ipp: 53.3V to 59V (acceptable range for general-purpose protection)
• Current - Peak Pulse (10/1000µs): 10.2A to 11.3A (within functional tolerance)
• Power - Peak Pulse: 600W (consistent across all parts)
• Operating Temperature Range: -65°C to 150°C minimum coverage
• RoHS3 Compliance: Required
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All identified substitutes maintain the core 33V protection threshold while operating within the specified electrical envelope. Clamping voltage variations (53.3V to 59V) remain within acceptable transient suppression performance for general-purpose applications. Peak pulse current ratings of 10.2A to 11.3A provide equivalent or enhanced surge handling capability.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active production status and full compliance with RoHS3 and REACH regulations, ensuring regulatory continuity and long-term availability.

SMBJ33CA (MDD): This substitute provides equivalent 33V standoff protection with 53.3V clamping and 11.3A peak pulse current. Operating temperature range extends to -50°C minimum, which is acceptable for most general-purpose applications. This part offers high inventory availability (25,840 units) and is suitable for standard commercial applications.

SMBJ33CA-13-F (Diodes Incorporated): This substitute delivers identical electrical performance with 53.3V clamping and 11.3A peak pulse current. Operating temperature range of -55°C to 150°C provides extended low-temperature coverage. The part is available in Cut Tape and Digi-Reel packaging with substantial inventory (35,300 units), supporting flexible procurement workflows.

SMBJ33CA-TP (Micro Commercial Co): This substitute offers the same 33V standoff voltage with 53.3V clamping and 11.3A peak pulse current. The operating temperature range extends to 175°C maximum, providing enhanced high-temperature performance. Tape & Reel packaging and 15,924 units in stock support automated assembly processes.

SZ1SMB33CAT3G (Littelfuse Inc.): This substitute provides equivalent 33V protection with 53.3V clamping and 11.3A peak pulse current. The part carries AEC-Q101 automotive qualification and is rated for -65°C to 150°C operation, matching the original part's temperature range. Capacitance specification of 265pF @ 1MHz is provided. Automotive-grade qualification and 107,750 units in stock support high-reliability and high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can SMBJ33CA (MDD) substitute for SMBJ33CE3/TR13 in all applications?

A: SMBJ33CA provides equivalent 33V standoff voltage and 36.7V minimum breakdown voltage. The 53.3V clamping voltage is lower than the original 59V specification, which provides tighter transient suppression. This is acceptable for general-purpose protection. The operating temperature minimum of -50°C is higher than the original -65°C; verify application requirements for low-temperature operation.

Q: What is the difference between SMBJ33CA-13-F and SMBJ33CA-TP?

A: Both parts provide identical electrical performance with 33V standoff, 36.7V breakdown, and 53.3V clamping. SMBJ33CA-13-F is supplied in Cut Tape and Digi-Reel packaging, while SMBJ33CA-TP is supplied in Tape & Reel. SMBJ33CA-TP offers extended high-temperature operation to 175°C versus 150°C for SMBJ33CA-13-F. Select based on assembly equipment compatibility and thermal requirements.

Q: Why does SZ1SMB33CAT3G have automotive qualification?

A: SZ1SMB33CAT3G carries AEC-Q101 automotive qualification, indicating it meets automotive industry reliability and performance standards. This qualification is provided by Littelfuse and does not affect general-purpose application compatibility. The part is suitable for both automotive and non-automotive applications requiring 33V transient suppression.

Q: Are all substitute parts compatible with the DO-214AA (SMB) package footprint?

A: All identified substitutes use DO-214AA (SMB) package and surface-mount technology. They are mechanically and electrically compatible with the original SMBJ33CE3/TR13 footprint. No PCB layout modifications are required for substitution.

Q: What is the significance of the clamping voltage difference between 59V and 53.3V?

A: The original SMBJ33CE3/TR13 clamps at 59V maximum, while all substitutes clamp at 53.3V maximum. Lower clamping voltage provides more aggressive transient suppression, limiting voltage peaks to a lower level. This is generally beneficial for circuit protection. Verify that protected components tolerate 53.3V clamping voltage; if 59V clamping is required, the original part must be used.

Q: Can SMBJ33CA-TP be used in applications requiring -65°C operation?

A: SMBJ33CA-TP is rated for -55°C minimum operating temperature, which is higher than the -65°C requirement of the original part. For applications requiring -65°C operation, use SMBJ33CE3/TR13 or SZ1SMB33CAT3G, both rated to -65°C.

Q: What inventory considerations apply to these substitutes?

A: SZ1SMB33CAT3G (Littelfuse) has the highest inventory at 107,750 units. SMBJ33CA (MDD) has 25,840 units, SMBJ33CA-13-F (Diodes Inc.) has 35,300 units, and SMBJ33CA-TP (Micro Commercial) has 15,924 units. All parts are in active production with substantial stock levels supporting immediate procurement.

Q: Are all substitutes RoHS3 and REACH compliant?

A: All identified substitutes are RoHS3 compliant and REACH unaffected. Regulatory compliance is maintained across all alternatives, supporting use in regulated markets and applications with environmental compliance requirements.