SMBJ33E3/TR13 Equivalent & Substitute Parts

Part Overview

The SMBJ33E3/TR13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This surface-mount component operates in the 33V reverse standoff voltage class and is housed in a DO-214AA (SMB) package. The part is currently active and in production, with 843 units available in inventory.

Equivalent and substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and compliance certifications. Substitutes must maintain identical reverse standoff voltage, comparable clamping voltage performance, and compatible package specifications to ensure direct replacement capability in circuit designs.

Substiute Parts

SMBJ33E3/TR13

Microchip TechnologyIn Stock: 890SMBJ33E3/TR13 Datasheet

Current PartRFQ

SMBJ33A

Good-Ark SemiconductorIn Stock: 17220SMBJ33A Datasheet

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SMBJ33A

Good-Ark SemiconductorIn Stock: 17220SMBJ33A Datasheet

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SMBJ33A

Good-Ark SemiconductorIn Stock: 17220SMBJ33A Datasheet

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SMBJ33A-13-F

Diodes IncorporatedIn Stock: 1773SMBJ33A-13-F Datasheet

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SMBJ33A-TP

Micro Commercial CoIn Stock: 1464SMBJ33A-TP Datasheet

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SMBJ33A-TR

STMicroelectronicsIn Stock: 5301SMBJ33A-TR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ33E3/TR13 is determined by the following critical parameters:

Mandatory Matching Criteria:

• Reverse Standoff Voltage (Typ): 33V
• Breakdown Voltage (Min): 36.7V
• Package Type: DO-214AA (SMB)
• Mounting Type: Surface Mount
• Unidirectional Configuration: 1 Channel
• Device Type: Zener TVS Diode

Allowable Variation Parameters:

• Clamping Voltage (Max) @ Ipp: Substitute parts with clamping voltages between 53.3V and 59V are functionally compatible, as both values remain within acceptable transient suppression performance ranges for 33V standoff applications.
• Peak Pulse Current (10/1000µs): Substitute parts with peak pulse currents of 11.3A to 11.8A provide equivalent or superior surge handling compared to the 10.2A specification.
• Operating Temperature Range: Substitute parts with operating ranges of -55°C to 150°C or -55°C to 175°C are compatible with the original -65°C to 150°C specification, as the upper temperature limit remains constant or exceeds the original.

All identified substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and active product status, ensuring regulatory and supply chain compatibility.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts are functionally equivalent to the SMBJ33E3/TR13 for general-purpose transient voltage suppression applications. Selection among available substitutes should be based on the following factors:

Supply Chain Availability:

• SMBJ33A (Good-Ark Semiconductor): 17,111 units in inventory, highest availability
• SMBJ33A-TR (STMicroelectronics): 5,200 units in inventory
• SMBJ33A-TP (Micro Commercial Co): 1,394 units in inventory
• SMBJ33A-13-F (Diodes Incorporated): 1,685 units in inventory

Regulatory Compliance: All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, meeting the compliance profile of the original component. No additional qualification is required from a regulatory standpoint.

Temperature Performance: The SMBJ33A-TP variant from Micro Commercial Co extends the upper operating temperature limit to 175°C, compared to 150°C for other variants. This option is suitable for applications requiring enhanced thermal performance.

Electrical Performance: All substitute parts deliver equivalent or superior electrical performance. The SMBJ33A-TR variant from STMicroelectronics provides the highest peak pulse current rating at 11.8A, compared to 10.2A for the original part. All substitute parts feature reduced clamping voltage (53.3V) compared to the original (59V), resulting in improved transient suppression characteristics.

Frequently Asked Questions (FAQ)

Q: Can SMBJ33A parts from different manufacturers be used interchangeably with the SMBJ33E3/TR13?

A: Yes. All SMBJ33A variants identified in this reference maintain identical reverse standoff voltage (33V), breakdown voltage (36.7V), and package specifications (DO-214AA SMB). Electrical performance differences are within acceptable tolerances for general-purpose TVS applications. Verify packaging format (Tape & Reel vs. Cut Tape) matches your assembly requirements.

Q: What is the significance of the clamping voltage difference between the original part (59V) and substitute parts (53.3V)?

A: The clamping voltage represents the maximum voltage across the TVS diode during a transient event at peak pulse current. Lower clamping voltage indicates superior transient suppression performance. The 53.3V clamping voltage of substitute parts provides enhanced protection compared to the original 59V specification, making them suitable for direct replacement in existing designs.

Q: Are there temperature range limitations when substituting the SMBJ33E3/TR13?

A: The original part operates from -65°C to 150°C. Most substitute parts operate from -55°C to 150°C, representing a 10°C reduction in the lower temperature limit. For applications requiring operation below -55°C, the original SMBJ33E3/TR13 is required. The SMBJ33A-TP variant extends the upper limit to 175°C and is suitable for high-temperature applications.

Q: Do packaging format differences (Tape & Reel vs. Cut Tape) affect electrical compatibility?

A: Packaging format does not affect electrical compatibility. Format differences relate only to component delivery and handling for automated assembly. Verify that your assembly equipment is compatible with the selected packaging format before procurement.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts maintain ROHS3 compliance and MSL Level 1 rating, matching the regulatory profile of the original SMBJ33E3/TR13. No additional compliance verification is required.

Q: Which substitute part offers the best availability?

A: SMBJ33A from Good-Ark Semiconductor offers the highest inventory level at 17,111 units. This variant is suitable for high-volume production requirements and provides the shortest lead times.