SMLJ8.5E3/TR13 Equivalent & Substitute Parts

Part Overview

The SMLJ8.5E3/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 features an 8.5V reverse standoff voltage with a 15.9V maximum clamping voltage and 188.6A peak pulse current capability. The device is packaged in DO-214AB (SMC) format and is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified based on matching or closely aligned electrical parameters including reverse standoff voltage, clamping voltage, peak pulse current, and power dissipation characteristics, combined with compatible surface-mount packaging and active product status.

Substiute Parts

SMLJ8.5E3/TR13

Microchip TechnologyIn Stock: 987SMLJ8.5E3/TR13 Datasheet

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1.5SMC10A

Taiwan Semiconductor CorporationIn Stock: 203021.5SMC10A Datasheet

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SMCJ8.5A

EVVO SemiIn Stock: 9502SMCJ8.5A Datasheet

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SMCJ8.5A

EVVO SemiIn Stock: 9502SMCJ8.5A Datasheet

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SMCJ8.5A-13-F

Diodes IncorporatedIn Stock: 1063SMCJ8.5A-13-F Datasheet

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SMDJ8.5A

Alpha & Omega Semiconductor Inc.In Stock: 12477SMDJ8.5A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMLJ8.5E3/TR13 are identified based on the following critical electrical and mechanical parameters:

Primary Matching Criteria:

• Reverse standoff voltage: 8.5V nominal (tolerance range 8.55V acceptable)
• Breakdown voltage minimum: 9.44V to 9.5V
• Clamping voltage maximum: 14.4V to 15.9V @ Ipp
• Unidirectional channel configuration: 1 channel
• Package type: DO-214AB / SMC surface mount
• Operating temperature range: -55°C to 150°C
• Product status: Active
• RoHS3 compliance: Required

Substitution Logic: All identified substitute parts maintain the core voltage protection characteristics (8.5V standoff, single-channel unidirectional topology) and surface-mount DO-214AB packaging. Variations in peak pulse current (104.2A to 208.4A) and power dissipation (1500W to 3000W) reflect different manufacturer implementations of the same voltage class. These differences are acceptable for general-purpose applications where the primary requirement is voltage clamping at the specified threshold. All substitute parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (Direct Equivalent): The SMDJ8.5A from Alpha & Omega Semiconductor Inc. provides the closest electrical match to the SMLJ8.5E3/TR13, with identical reverse standoff voltage (8.5V), breakdown voltage (9.44V), and clamping voltage (14.4V). The SMDJ8.5A offers higher peak pulse current (208.4A) and power dissipation (3000W) compared to the original part (188.6A, 300W), making it suitable for applications requiring enhanced transient protection margin. Both parts are ROHS3 compliant, active products in DO-214AB packaging.

Secondary Selection (Voltage-Matched Alternatives): The SMCJ8.5A from EVVO Semi and SMCJ8.5A-13-F from Diodes Incorporated both maintain the 8.5V standoff voltage and 9.44V breakdown voltage specifications. These parts feature 1500W power dissipation and 104.2A peak pulse current, representing a mid-range option between the original SMLJ8.5E3/TR13 and the higher-power SMDJ8.5A. Both are active products with ROHS3 compliance and unlimited moisture sensitivity.

Alternative Selection (Higher Power Capability): The 1.5SMC10A from Taiwan Semiconductor Corporation operates at 8.55V standoff voltage (within acceptable tolerance) with 14.5V clamping voltage. This part delivers 1500W peak pulse power and 108A peak pulse current. The 1.5SMC10A is designated for telecom applications and is ROHS3 compliant with active product status.

Compliance and Availability: All substitute parts maintain ROHS3 compliance and active production status. The SMDJ8.5A offers the highest inventory availability (12,400 pcs) among substitutes. The SMCJ8.5A-13-F from Diodes Incorporated has the lowest inventory (1,023 pcs). Selection should account for application-specific power dissipation requirements and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can the SMCJ8.5A be used as a direct replacement for the SMLJ8.5E3/TR13?

A: The SMCJ8.5A is electrically compatible for general-purpose overvoltage protection applications. Both parts share identical reverse standoff voltage (8.5V), breakdown voltage (9.44V), and operate within the same temperature range (-55°C to 150°C). The SMCJ8.5A features lower peak pulse current (104.2A vs. 188.6A) and power dissipation (1500W vs. 300W). For applications where the original part's 300W specification is a design requirement, the SMCJ8.5A's higher power rating (1500W) provides additional margin. Both are packaged in DO-214AB (SMC) format and are ROHS3 compliant.

Q: What is the difference between the SMDJ8.5A and SMCJ8.5A?

A: Both parts maintain the same voltage specifications (8.5V standoff, 9.44V breakdown, 14.4V clamping). The primary difference is power dissipation capability: the SMDJ8.5A delivers 3000W peak pulse power with 208.4A peak pulse current, while the SMCJ8.5A delivers 1500W with 104.2A. The SMDJ8.5A is suitable for high-energy transient environments, whereas the SMCJ8.5A is appropriate for standard general-purpose protection circuits. Both are surface-mount DO-214AB devices with identical operating temperature ranges and ROHS3 compliance.

Q: Is the 1.5SMC10A from Taiwan Semiconductor Corporation compatible with the SMLJ8.5E3/TR13?

A: The 1.5SMC10A is compatible for voltage protection applications. It operates at 8.55V reverse standoff voltage (0.05V higher than the original 8.5V specification) and 14.5V clamping voltage. The breakdown voltage minimum is 9.5V, compared to 9.44V for the SMLJ8.5E3/TR13. These differences fall within acceptable tolerance ranges for TVS diode substitution. The 1.5SMC10A features 1500W power dissipation and 108A peak pulse current. Both parts are packaged in DO-214AB (SMC) format, are ROHS3 compliant, and have unlimited moisture sensitivity ratings.

Q: Are all substitute parts available in the same packaging format?

A: All identified substitute parts are packaged in DO-214AB (SMC) surface-mount format, matching the original SMLJ8.5E3/TR13 package specification. Packaging variations exist only in tape format: the SMLJ8.5E3/TR13 and SMCJ8.5A-13-F are supplied in Tape & Reel (TR) format, while the SMCJ8.5A from EVVO Semi is available in Cut Tape (CT) & Digi-Reel® format, and the SMDJ8.5A is supplied in Tape & Reel (TR) format. These packaging differences do not affect electrical compatibility or board-level integration.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by: (1) reverse standoff voltage within 8.5V ± tolerance, (2) breakdown voltage minimum between 9.44V and 9.5V, (3) clamping voltage maximum between 14.4V and 15.9V, (4) unidirectional single-channel topology, (5) surface-mount DO-214AB (SMC) packaging, (6) operating temperature range -55°C to 150°C, (7) active product status, and (8) ROHS3 compliance. Peak pulse current and power dissipation variations are acceptable provided the substitute part meets or exceeds the application's transient energy requirements.

Q: Do all substitute parts have the same moisture sensitivity level?

A: The SMLJ8.5E3/TR13, 1.5SMC10A, SMCJ8.5A, and SMCJ8.5A-13-F all have Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture-related handling restrictions. The SMDJ8.5A from Alpha & Omega Semiconductor Inc. does not specify an MSL rating in the provided data. For applications with strict moisture sensitivity requirements, the parts with explicitly stated MSL 1 rating are preferred.

Q: Can the SMLJ8.5E3/TR13 be substituted with a higher-power rated part?

A: Yes. The SMDJ8.5A (3000W) and SMCJ8.5A (1500W) both provide higher power dissipation ratings than the original SMLJ8.5E3/TR13 (300W). Higher power ratings provide additional transient energy absorption capability without affecting voltage protection characteristics. All three parts maintain identical reverse standoff voltage (8.5V) and compatible clamping voltages (14.4V to 15.9V). Selection of a higher-power substitute is appropriate when circuit design requires enhanced transient protection margin or when operating in high-energy transient environments.