SMBJ85E3/TR13 Equivalent & Substitute Parts

Part Overview

The SMBJ85E3/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 an 85V reverse standoff voltage and provides clamping at 151V maximum, with a peak pulse current rating of 3.9A. The device is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified based on matching electrical characteristics within the SMBJ85 series, including reverse standoff voltage, breakdown voltage, clamping voltage range, peak pulse current capability, and thermal operating range. Alternative sources provide equivalent or superior performance parameters while maintaining the same package form factor and compliance certifications.

Substiute Parts

SMBJ85E3/TR13

Microchip TechnologyIn Stock: 870SMBJ85E3/TR13 Datasheet

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SMBJ85A

MeritekIn Stock: 2164SMBJ85A Datasheet

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SMBJ85A

MeritekIn Stock: 2164SMBJ85A Datasheet

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SMBJ85A

MeritekIn Stock: 2164SMBJ85A Datasheet

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SMBJ85A-13-F

Diodes IncorporatedIn Stock: 4424SMBJ85A-13-F Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ85E3/TR13 are qualified based on the following electrical and mechanical criteria:

Matching Parameters (Required for Substitution):

• Voltage - Reverse Standoff (Typ): 85V
• Voltage - Breakdown (Min): 94.4V
• Package / Case: DO-214AA (SMB)
• Mounting Type: Surface Mount
• Type: Zener
• Unidirectional Channels: 1
• RoHS3 Compliance
• MSL 1 (Unlimited)

Allowable Variation Parameters:

• Voltage - Clamping (Max) @ Ipp: 137V to 151V (lower clamping voltage provides enhanced protection margin)
• Current - Peak Pulse (10/1000µs): 3.9A to 4.4A (higher current capability maintains or exceeds performance)
• Operating Temperature Range: -55°C to 150°C (subset of original -65°C to 150°C range remains acceptable for most applications)

All substitute parts maintain the 600W peak pulse power rating and are classified as Active product status with REACH Unaffected and EAR99 ECCN designations.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SMBJ85A-13-F (Diodes Incorporated)

The SMBJ85A-13-F is the preferred substitute for the SMBJ85E3/TR13. This part maintains identical reverse standoff voltage (85V) and breakdown voltage (94.4V) specifications. The clamping voltage is reduced to 137V maximum, providing a 14V improvement in transient suppression performance. Peak pulse current is rated at 4.4A, exceeding the original 3.9A specification. The device is supplied in Tape & Reel packaging with 4,344 units in stock. All compliance certifications match the original part: RoHS3 compliant, MSL 1, REACH Unaffected, and EAR99 classification. Operating temperature range is -55°C to 150°C, which covers the upper portion of the original thermal specification.

Secondary Substitute: SMBJ85A (Meritek)

The SMBJ85A from Meritek provides equivalent electrical performance to the Diodes Incorporated variant, with identical reverse standoff voltage, breakdown voltage, and clamping voltage specifications (137V maximum). Peak pulse current is rated at 4.38A. This part is available in higher inventory (2,060 units in stock) and maintains all required compliance certifications. Operating temperature range is -55°C to 150°C. Package designation is DO-214AA (SMB) surface mount.

Compliance and Certification Alignment:

All substitute parts maintain Active product status and are fully compliant with RoHS3 requirements. Moisture sensitivity level remains at MSL 1 (Unlimited) for all alternatives. REACH status is Unaffected and ECCN classification is EAR99 for all listed substitutes, ensuring regulatory equivalence with the original SMBJ85E3/TR13.

Frequently Asked Questions (FAQ)

Q: Can SMBJ85A-13-F directly replace SMBJ85E3/TR13 in existing designs?

A: Yes. Both parts share identical reverse standoff voltage (85V), breakdown voltage (94.4V), and package form factor (DO-214AA SMB surface mount). The SMBJ85A-13-F provides superior clamping performance at 137V versus 151V, resulting in lower transient voltage peaks. Peak pulse current capability is higher at 4.4A compared to 3.9A. Operating temperature range is -55°C to 150°C, which covers standard industrial and commercial temperature specifications.

Q: What is the difference between the 151V and 137V clamping voltages?

A: Clamping voltage represents the maximum voltage across the TVS diode during a transient event at peak pulse current. The SMBJ85E3/TR13 clamps at 151V maximum, while substitute parts SMBJ85A and SMBJ85A-13-F clamp at 137V maximum. Lower clamping voltage provides superior protection by limiting the peak voltage experienced by protected circuitry. Both values fall within acceptable ranges for 85V standoff applications.

Q: Are there packaging differences between substitute options?

A: The SMBJ85A-13-F is supplied in Tape & Reel (TR) packaging, matching the original SMBJ85E3/TR13 format. The SMBJ85A from Meritek does not specify packaging format in available data. Both alternatives use the DO-214AA (SMB) surface mount package case, ensuring mechanical compatibility with existing PCB layouts and pick-and-place equipment.

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

A: Yes. All listed substitutes are RoHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, maintain REACH Unaffected status, and are classified as EAR99 for export control purposes. These certifications match the original SMBJ85E3/TR13 specifications.

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

A: The original SMBJ85E3/TR13 operates from -65°C to 150°C. 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 Microchip part is required. For standard industrial and commercial temperature ranges (-40°C to 85°C ambient), substitute parts provide full compatibility.

Q: Which substitute offers the highest peak pulse current rating?

A: The SMBJ85A-13-F from Diodes Incorporated provides the highest peak pulse current specification at 4.4A, compared to 3.9A for the original part and 4.38A for the Meritek SMBJ85A. All three parts maintain the same 600W peak pulse power rating.

Q: Is inventory availability a consideration for part selection?

A: Inventory levels are provided for reference: SMBJ85E3/TR13 (Microchip) has 798 units in stock, SMBJ85A (Meritek) has 2,060 units, and SMBJ85A-13-F (Diodes Incorporated) has 4,344 units available. Higher inventory levels may support extended production runs or rapid fulfillment requirements.