SMCJ85E3/TR13 Equivalent & Substitute Parts

Part Overview

The SMCJ85E3/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 protection at 151V maximum. The part is currently in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified based on matching electrical characteristics within the 85V voltage class, identical packaging format (DO-214AB/SMC), and compatible operating temperature ranges. Alternatives are selected when the original part faces supply constraints or when application requirements permit operation within the specified parameter tolerances.

Substiute Parts

SMCJ85E3/TR13

Microchip TechnologyIn Stock: 1035SMCJ85E3/TR13 Datasheet

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5.0SMDJ85A

Taiwan Semiconductor CorporationIn Stock: 184825.0SMDJ85A Datasheet

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SMCJ85A

MDDIn Stock: 17966SMCJ85A Datasheet

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SMCJ85A

MDDIn Stock: 17966SMCJ85A Datasheet

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SMCJ85A

MDDIn Stock: 17966SMCJ85A Datasheet

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SMCJ85A-13-F

Diodes IncorporatedIn Stock: 2706SMCJ85A-13-F Datasheet

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SMDJ85A

Alpha & Omega Semiconductor Inc.In Stock: 4587SMDJ85A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMCJ85E3/TR13 are qualified based on the following criteria:

Electrical Parameter Matching:

• Reverse standoff voltage: 85V (nominal)
• Breakdown voltage minimum: 94.4V
• Unidirectional topology with single channel
• Zener diode type classification
• General-purpose application category

Mechanical & Packaging Compatibility:

• Package format: DO-214AB or SMC equivalent
• Surface-mount mounting type
• Tape & Reel packaging availability

Compliance & Status:

• Active product status
• RoHS3 compliance required
• REACH unaffected status

Operational Constraints:

• Operating temperature range overlap with original specification
• Moisture sensitivity level MSL 1 (unlimited)

Substitutes are grouped into two categories: direct electrical equivalents (matching clamping voltage and peak pulse current within component tolerance) and functional alternatives (meeting voltage class and package requirements with different power dissipation or current ratings).

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Preferred for Pin-for-Pin Replacement):

SMCJ85A (MDD) and SMCJ85A-13-F (Diodes Incorporated) are the closest functional equivalents to the SMCJ85E3/TR13. Both maintain the 85V voltage class, 1500W peak pulse power rating, and DO-214AB/SMC package format. The SMCJ85A-13-F variant from Diodes Incorporated offers the widest operating temperature range (-55 to 150°C) and is suitable for applications requiring extended low-temperature performance. Both parts carry full RoHS3 compliance and MSL 1 rating, ensuring compatibility with standard surface-mount assembly processes.

Higher Power Alternatives:

The 5.0SMDJ85A (Taiwan Semiconductor Corporation) and SMDJ85A (Alpha & Omega Semiconductor Inc.) provide increased peak pulse current and power dissipation capacity (5000W and 3000W respectively) while maintaining the 85V voltage class and identical package format. These alternatives are applicable when circuit protection requirements exceed the 1500W specification of the original part, or when thermal design margins require higher power handling capability. Both parts maintain RoHS3 compliance and active production status.

Selection Criteria Based on Compliance:

All identified substitutes maintain ROHS3 compliance, REACH unaffected status, and active product status. Operating temperature range should be verified against application requirements; the SMCJ85E3/TR13 specification of -65 to 150°C is the most extended range among alternatives. For applications operating below -55°C, the original Microchip part is the only qualified option.

Frequently Asked Questions (FAQ)

Q: Can SMCJ85A (MDD) be used as a direct replacement for SMCJ85E3/TR13?

A: Yes. Both parts share identical reverse standoff voltage (85V), breakdown voltage (94.4V minimum), peak pulse power rating (1500W), and DO-214AB/SMC package format. The clamping voltage differs by 14V (137V vs. 151V), which represents a 9.3% variation within typical component tolerance bands for this device class. Both parts are RoHS3 compliant and carry MSL 1 rating. Verify that the lower clamping voltage (137V) is acceptable for the specific circuit protection requirement.

Q: What is the difference between SMCJ85A and SMCJ85A-13-F?

A: Both parts are 85V TVS diodes in DO-214AB/SMC packaging with 1500W peak pulse power and 137V clamping voltage. The primary difference is manufacturer: SMCJ85A is supplied by MDD, while SMCJ85A-13-F is supplied by Diodes Incorporated. The Diodes variant offers a slightly wider operating temperature range (-55 to 150°C vs. -50 to 150°C for MDD). Both are functionally equivalent for circuit protection applications.

Q: When should I use 5.0SMDJ85A instead of the original SMCJ85E3/TR13?

A: The 5.0SMDJ85A is selected when the circuit requires higher transient energy absorption capacity. This part provides 5000W peak pulse power (3.3× the original specification) and 36.5A peak pulse current (3.7× the original specification). Use this substitute when protecting circuits exposed to high-energy transient events or when thermal analysis indicates insufficient margin with the 1500W rated part. The 85V voltage class and DO-214AB package remain identical.

Q: Are all substitute parts available in Tape & Reel packaging?

A: The SMCJ85E3/TR13, 5.0SMDJ85A, SMCJ85A, SMCJ85A-13-F, and SMDJ85A are all available in Tape & Reel (TR) packaging format suitable for automated assembly. Verify packaging specification with the supplier, as some manufacturers may offer alternative packaging options.

Q: What is the impact of different clamping voltages (151V vs. 137V) on circuit protection?

A: Clamping voltage determines the maximum voltage the TVS diode allows across the protected circuit during a transient event. The SMCJ85E3/TR13 clamps at 151V maximum, while substitute parts (SMCJ85A, SMCJ85A-13-F, SMDJ85A, 5.0SMDJ85A) clamp at 137V maximum. The 14V difference represents improved protection margin with substitute parts. Verify that the protected circuit components tolerate the clamping voltage specification before substitution.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All identified substitute parts (5.0SMDJ85A, SMCJ85A, SMCJ85A-13-F, SMDJ85A) carry RoHS3 compliance certification and REACH unaffected status, matching the original SMCJ85E3/TR13 specification. All parts are suitable for applications requiring environmental compliance documentation.

Q: What is the operating temperature consideration for substitution?

A: The SMCJ85E3/TR13 operates from -65 to 150°C, providing the widest temperature range among all alternatives. Substitute parts operate from -50 to -55°C minimum. For applications requiring operation below -55°C, the original Microchip part is the only qualified option. For standard industrial temperature ranges (-40 to 85°C), all parts are functionally equivalent.