SMCJ8.5CA-M3/9AT Equivalent & Substitute Parts

Part Overview

The SMCJ8.5CA-M3/9AT is a bidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates with an 8.5V reverse standoff voltage and provides 14.4V maximum clamping voltage at peak pulse current of 104.2A, delivering 1500W peak pulse power dissipation. The device is classified as Active product status and is RoHS3 compliant. Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational parameters within the DO-214AB (SMC) form factor.

Substiute Parts

SMCJ8.5CA-M3/9AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 879SMCJ8.5CA-M3/9AT Datasheet

Current PartRFQ

SMCJ8.5CA-E3/57T

Vishay General Semiconductor - Diodes DivisionIn Stock: 34114SMCJ8.5CA-E3/57T Datasheet

DirectRFQ

1SMC8.5CA TR13 PBFREE

Central Semiconductor CorpIn Stock: 41241SMC8.5CA TR13 PBFREE Datasheet

DirectRFQ

1.5SMC10CA

Taiwan Semiconductor CorporationIn Stock: 166721.5SMC10CA Datasheet

MFR RecommendedRFQ

SM15T10CA

STMicroelectronicsIn Stock: 17516SM15T10CA Datasheet

MFR RecommendedRFQ

SMCJ8.5CA

Taiwan Semiconductor CorporationIn Stock: 15234SMCJ8.5CA Datasheet

MFR RecommendedRFQ

SMDJ8.5CA

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are grouped into two categories based on electrical parameter alignment:

Category 1: Direct Electrical Equivalents These parts maintain identical or near-identical electrical specifications across all critical parameters: 8.5V reverse standoff voltage, 9.44V minimum breakdown voltage, 14.4V maximum clamping voltage, and 1500W peak pulse power rating. Substitution within this category is based on matching these core electrical characteristics while maintaining DO-214AB (SMC) package compatibility and surface mount mounting type.

Category 2: Manufacturer-Recommended Alternatives These parts exhibit minor variations in specific parameters (voltage standoff tolerance, peak pulse current, or clamping voltage) but remain functionally compatible for general purpose and telecom applications. Substitution is permitted where the application tolerates these parameter variations within the specified operating ranges.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility) SMCJ8.5CA-E3/57T, 1SMC8.5CA TR13 PBFREE, SMCJ8.5CA, and SMDJ8.5CA maintain electrical specifications within acceptable tolerance ranges for the SMCJ8.5CA-M3/9AT. All parts are Active status with RoHS3 compliance. SMDJ8.5CA provides doubled peak pulse power (3000W vs 1500W), offering enhanced margin for transient suppression in high-energy applications.

Manufacturer-Recommended Alternatives 1.5SMC10CA and SM15T10CA are designated as manufacturer-recommended substitutes. The 1.5SMC10CA exhibits marginally higher standoff voltage (8.55V) and clamping voltage (14.5V) with comparable peak pulse current (108A). The SM15T10CA operates with significantly higher clamping voltage (18.6V) and peak pulse current (538A at 8/20µs pulse width), suitable for applications requiring enhanced transient suppression capability. Both maintain Active product status and RoHS3 compliance.

Temperature Consideration 1SMC8.5CA TR13 PBFREE extends the lower operating temperature limit to -65°C, providing wider thermal range coverage compared to the main part specification of -55°C minimum.

Frequently Asked Questions (FAQ)

Q: Can SMCJ8.5CA-E3/57T be used as a direct replacement for SMCJ8.5CA-M3/9AT? A: Yes. Both parts share identical electrical specifications: 8.5V reverse standoff voltage, 9.44V breakdown voltage, 14.4V clamping voltage, 104.2A peak pulse current, and 1500W peak pulse power. Both are packaged in DO-214AB (SMC) surface mount form factor and are Active status with RoHS3 compliance.

Q: What is the difference between SMDJ8.5CA and the main part? A: SMDJ8.5CA maintains identical voltage specifications (8.5V standoff, 9.44V breakdown, 14.4V clamping) but provides doubled peak pulse power dissipation (3000W vs 1500W) and higher peak pulse current handling (208.4A vs 104.2A). This makes it suitable for applications with higher transient energy requirements while maintaining the same package and mounting type.

Q: When should SM15T10CA be selected over the main part? A: SM15T10CA is selected when the application requires higher transient suppression capability. It provides 18.6V maximum clamping voltage and 538A peak pulse current (8/20µs pulse width), compared to 14.4V and 104.2A for the main part. This higher performance comes at the cost of increased clamping voltage, which may affect circuit operation if the protected circuit cannot tolerate the higher clamp level.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain RoHS3 compliance status, matching the environmental and regulatory requirements of the main part.

Q: Does package compatibility differ among substitute parts? A: No. All substitute parts use DO-214AB (SMC) package with surface mount mounting type, ensuring mechanical and electrical compatibility with the original design without PCB layout modifications.

Q: What is the significance of the 1SMC8.5CA TR13 PBFREE extended temperature range? A: The 1SMC8.5CA TR13 PBFREE operates from -65°C to 150°C, extending the lower temperature limit by 10°C compared to the main part (-55°C to 150°C). This provides additional thermal margin for applications operating in cold environments or with stringent temperature specifications.