SMLJ8.5CE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMLJ8.5CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode operates with a reverse standoff voltage of 8.5V and provides clamping at 15.9V with a peak pulse current rating of 188.6A. The component is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical performance can be achieved within the allowed parameter ranges for this TVS diode category, maintaining compatibility with DO-214AB (SMC) surface-mount packaging and the specified voltage and current protection requirements.

Substiute Parts

SMLJ8.5CE3/TR13

Microchip TechnologyIn Stock: 903SMLJ8.5CE3/TR13 Datasheet

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1.5SMC10CA

Taiwan Semiconductor CorporationIn Stock: 166721.5SMC10CA Datasheet

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1.5SMC10CA-E3/57T

Vishay General Semiconductor - Diodes DivisionIn Stock: 10241.5SMC10CA-E3/57T Datasheet

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SM15T10CA

STMicroelectronicsIn Stock: 17516SM15T10CA Datasheet

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SMCJ11CA-13-F

Diodes IncorporatedIn Stock: 3677SMCJ11CA-13-F Datasheet

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SMCJ8.5CA

Taiwan Semiconductor CorporationIn Stock: 15234SMCJ8.5CA Datasheet

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SMCJ8.5CA-13-F

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

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SMDJ8.5CA

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

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Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the SMLJ8.5CE3/TR13 is determined by the following critical parameters:

Voltage Compatibility: Reverse standoff voltage must be 8.5V (±tolerance), with breakdown minimum at or above 9.44V. Clamping voltage at peak pulse current must remain within acceptable protection thresholds.

Current Handling: Peak pulse current rating (10/1000µs) must support the application requirements. The main part specifies 188.6A; substitute parts with lower current ratings (103A–109A) are acceptable for applications with reduced transient stress, while higher ratings (208.4A–538A) provide enhanced protection margin.

Package Compatibility: All substitute parts must use DO-214AB (SMC) surface-mount packaging to ensure mechanical and electrical compatibility with existing PCB layouts.

Thermal Performance: Operating temperature range must span -55°C to 150°C minimum to match the main part's thermal envelope.

Compliance & Status: All parts must be Active product status, RoHS3 compliant, and MSL 1 rated to ensure supply chain availability and regulatory conformance.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Voltage-Matched 8.5V Standoff):

SMCJ8.5CA, SMCJ8.5CA-13-F, and SMDJ8.5CA maintain identical reverse standoff voltage (8.5V) and breakdown voltage (9.44V) specifications. These parts are direct electrical equivalents with clamping voltages between 14.4V and 14.4V. SMDJ8.5CA provides enhanced power dissipation (3000W versus 300W), suitable for high-stress transient environments. All three are Active status, RoHS3 compliant, and available in DO-214AB SMC packaging.

Secondary Substitutes (8.55V Standoff, Enhanced Power Rating):

1.5SMC10CA, 1.5SMC10CA-E3/57T, and SM15T10CA operate at 8.55V reverse standoff with 9.5V breakdown minimum. These parts deliver 1500W peak pulse power, exceeding the main part's 300W rating. Clamping voltages range from 14.5V to 18.6V. The 1.5SMC10CA-E3/57T extends operating temperature to -65°C, providing wider thermal margin. SM15T10CA specifies 538A peak pulse current (8/20µs pulse definition), delivering superior transient suppression capability.

Alternative Voltage Class (11V Standoff):

SMCJ11CA-13-F operates at 11V reverse standoff with 12.2V breakdown minimum, representing a higher voltage protection class. This part is suitable only for applications where the protected circuit operates at higher nominal voltages. Clamping voltage reaches 18.2V with 1500W power rating.

Selection Criteria:

Choose substitutes based on application transient stress level and circuit voltage class. For direct replacement in existing designs, select parts with matching 8.5V standoff voltage (SMCJ8.5CA series or SMDJ8.5CA). For enhanced protection margin or higher power dissipation requirements, select 1.5SMC10CA or SM15T10CA variants. All recommended substitutes maintain Active product status, RoHS3 compliance, and MSL 1 rating, ensuring supply chain continuity and regulatory conformance.

Frequently Asked Questions (FAQ)

Q: Can I substitute SMLJ8.5CE3/TR13 with 1.5SMC10CA?

A: Yes. Both parts share 8.55V reverse standoff voltage (within tolerance of the main part's 8.5V specification), identical 9.5V minimum breakdown voltage, and DO-214AB SMC packaging. The 1.5SMC10CA provides 1500W peak pulse power versus the main part's 300W, offering enhanced protection margin. Clamping voltage is 14.5V compared to 15.9V, remaining within acceptable protection thresholds.

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

A: Both parts maintain 8.5V reverse standoff and 9.44V breakdown voltage. The primary difference is power dissipation: SMCJ8.5CA is rated 1500W peak pulse, while SMDJ8.5CA is rated 3000W peak pulse. SMDJ8.5CA accommodates higher transient energy stress. Peak pulse current is 109A (SMCJ8.5CA) versus 208.4A (SMDJ8.5CA). Both use DO-214AB SMC packaging and are electrically compatible.

Q: Why does SM15T10CA have a different peak pulse current specification (538A at 8/20µs)?

A: SM15T10CA specifies peak pulse current using an 8/20µs pulse definition, whereas the main part and most other substitutes use 10/1000µs definition. These represent different transient waveform standards. The 8/20µs pulse is shorter and sharper, resulting in higher peak current values for the same energy. Both specifications are valid for different application environments. Verify your circuit's transient waveform characteristics before selection.

Q: Is SMCJ11CA-13-F compatible with SMLJ8.5CE3/TR13?

A: SMCJ11CA-13-F operates at 11V reverse standoff versus the main part's 8.5V. This represents a different voltage protection class. Substitution is valid only if your protected circuit operates at higher nominal voltages (approximately 11V range). Do not use this part in circuits designed for 8.5V protection, as it will not suppress transients until higher voltage thresholds are reached.

Q: Do all substitute parts use the same DO-214AB SMC package?

A: Yes. All listed substitute parts use DO-214AB (SMC) surface-mount packaging, ensuring mechanical and electrical compatibility with existing PCB layouts designed for SMLJ8.5CE3/TR13.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the main part's compliance profile and ensuring regulatory conformance and supply chain compatibility.

Q: What is the temperature operating range for substitute parts?

A: Most substitute parts operate from -55°C to 150°C (TJ), matching the main part. Exception: 1.5SMC10CA-E3/57T extends the lower limit to -65°C, providing wider thermal margin for cold-environment applications.