SMLJ8.5CA Equivalent & Substitute Parts

Part Overview

The SMLJ8.5CA is a bidirectional transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features an 8.5V reverse standoff voltage, 14.4V maximum clamping voltage, and 3000W peak pulse power rating in a DO-214AB (SMC) package. The part is active in production and RoHS3 compliant with unlimited moisture sensitivity level.

Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits selection from multiple qualified manufacturers meeting the same electrical and mechanical specifications.

Substiute Parts

SMLJ8.5CA

Bourns Inc.In Stock: 985SMLJ8.5CA Datasheet

Current PartRFQ

SMC30J8.5CA

STMicroelectronicsIn Stock: 4665SMC30J8.5CA Datasheet

DirectRFQ

SMDJ8.5CA

Alpha & Omega Semiconductor Inc.In Stock: 12246SMDJ8.5CA Datasheet

DirectRFQ

1.5SMC10CA

Taiwan Semiconductor CorporationIn Stock: 166721.5SMC10CA Datasheet

SimilarRFQ

SMCJ8.5CA-13-F

Diodes IncorporatedIn Stock: 1164SMCJ8.5CA-13-F Datasheet

SimilarRFQ

SMCJ8.5CA-TP

Micro Commercial CoIn Stock: 6557SMCJ8.5CA-TP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMLJ8.5CA are classified into two categories based on electrical parameter alignment:

Direct Substitutes maintain identical or equivalent electrical performance across all critical parameters: reverse standoff voltage (8.5V), breakdown voltage (9.44V minimum), clamping voltage (14.4V maximum), peak pulse current (208A or greater), and peak pulse power (3000W). These parts are pin-compatible and functionally interchangeable in the same circuit application without design modification.

Similar Substitutes share the same voltage class (8.5V standoff) and package form factor (DO-214AB/SMC) but differ in peak pulse current handling or power dissipation capability. These parts are mechanically compatible but may require thermal or circuit-level evaluation depending on application demands.

The following parameters determine substitution eligibility:

• Voltage - Reverse Standoff: 8.5V (±tolerance)
• Voltage - Clamping (Max) @ Ipp: 14.4V (±tolerance)
• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Type: Zener, Bidirectional

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Full Electrical Equivalence):

SMC30J8.5CA (STMicroelectronics) and SMDJ8.5CA (Alpha & Omega Semiconductor Inc.) are direct substitutes for SMLJ8.5CA. Both maintain 208A or greater peak pulse current and 3000W power dissipation. SMC30J8.5CA offers extended operating temperature range (-55 to 175°C) compared to the original part. All three parts are RoHS3 compliant and carry identical voltage specifications within tolerance.

Similar Substitutes (Reduced Power Handling):

1.5SMC10CA (Taiwan Semiconductor Corporation), SMCJ8.5CA-13-F (Diodes Incorporated), and SMCJ8.5CA-TP (Micro Commercial Co) are similar substitutes with reduced peak pulse current (104.2A or 108A) and power dissipation (1500W). These parts maintain voltage compatibility but are suitable only for applications where peak pulse current does not exceed their rated specifications. SMCJ8.5CA-TP provides extended operating temperature range (-55 to 175°C).

All substitute parts are RoHS3 compliant and carry EAR99 ECCN classification matching the original part.

Frequently Asked Questions (FAQ)

Q: Can SMC30J8.5CA replace SMLJ8.5CA directly?

A: Yes. SMC30J8.5CA is a direct substitute with identical voltage specifications (8.5V standoff, 14.4V clamping), equivalent peak pulse current (208A), and matching 3000W power rating. The extended operating temperature range (-55 to 175°C versus -55 to 150°C) provides additional thermal margin. Both use DO-214AB (SMC) packaging and are RoHS3 compliant.

Q: What is the difference between direct and similar substitutes?

A: Direct substitutes (SMC30J8.5CA, SMDJ8.5CA) maintain the full 208A peak pulse current and 3000W power dissipation of the original SMLJ8.5CA. Similar substitutes (1.5SMC10CA, SMCJ8.5CA-13-F, SMCJ8.5CA-TP) reduce peak pulse current to 104.2A or 108A and power to 1500W. Selection depends on circuit peak pulse current requirements.

Q: Are all substitute parts mechanically compatible?

A: Yes. All substitute parts use DO-214AB (SMC) surface-mount packaging, ensuring identical PCB footprint and reflow soldering compatibility with SMLJ8.5CA.

Q: Do substitute parts meet the same compliance standards?

A: All substitute parts listed are RoHS3 compliant and carry EAR99 ECCN classification. REACH status varies by manufacturer; verify specific REACH compliance requirements for your application.

Q: Which substitute offers the widest operating temperature range?

A: SMC30J8.5CA and SMCJ8.5CA-TP both support -55 to 175°C operating temperature, compared to -55 to 150°C for SMLJ8.5CA and other substitutes.

Q: Can SMCJ8.5CA-13-F or SMCJ8.5CA-TP be used in high-current transient applications?

A: These parts are suitable only for applications where peak pulse current remains below 104.2A. For applications requiring the full 208.4A peak pulse current of SMLJ8.5CA, use direct substitutes SMC30J8.5CA or SMDJ8.5CA.