SMBJ8.5E3/TR13

Part Overview

The SMBJ8.5E3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology in the SMB (DO-214AA) surface mount package. This unidirectional Zener-type TVS diode is designed for general-purpose transient voltage suppression with an 8.5V reverse standoff voltage and 15.9V maximum clamping voltage at peak pulse current. The component is in active product status with full ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are necessary when the primary part is unavailable, when sourcing from alternative distributors, or when application requirements align with slightly different electrical characteristics within acceptable tolerances.

Substiute Parts

SMBJ8.5E3/TR13

Microchip TechnologyIn Stock: 700SMBJ8.5E3/TR13 Datasheet

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P6SMB10A

Eaton - Electronics DivisionIn Stock: 9161P6SMB10A Datasheet

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SM6T10A

STMicroelectronicsIn Stock: 15265SM6T10A Datasheet

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SM6T10A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 21823SM6T10A-E3/52 Datasheet

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SM6T10AY

STMicroelectronicsIn Stock: 3405SM6T10AY Datasheet

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SMBJ8.5A

Taiwan Semiconductor CorporationIn Stock: 44396SMBJ8.5A Datasheet

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SMBJ8.5A

Taiwan Semiconductor CorporationIn Stock: 44396SMBJ8.5A Datasheet

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SMBJ8.5A-13-F

Diodes IncorporatedIn Stock: 4313SMBJ8.5A-13-F Datasheet

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SMBJ8V5A

Fairchild SemiconductorIn Stock: 35175SMBJ8V5A Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ8.5E3/TR13 are selected based on the following core electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Reverse Standoff: 8.5V ± tolerance
• Package / Case: DO-214AA or SMB equivalent
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• Type: Zener-based TVS diode
• Power Rating: 600W peak pulse
• RoHS Compliance: ROHS3 or equivalent compliance level

Allowable Parameter Variations: Substitute parts maintain compatibility when voltage breakdown and clamping characteristics fall within acceptable ranges for the application. The reverse standoff voltage tolerance of 8.55V is equivalent to the primary part at 8.5V. Clamping voltage variations from 14.4V to 18.6V and peak pulse current variations from 37.7A to 215A are acceptable within the 600W power dissipation envelope. Operating temperature range extensions are acceptable provided the minimum temperature does not exceed the primary part specification.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active product status and are available in quantities suitable for production use. Parts with ROHS3 compliance (SM6T10A, SM6T10A-E3/52, SM6T10AY, SMBJ8.5A variants, and SMBJ8.5A-13-F) are preferred for applications with strict environmental compliance requirements. The P6SMB10A carries RoHS compliance without specific ROHS3 designation.

For applications requiring the extended lower operating temperature limit of -65°C, select SMBJ8.5E3/TR13, SM6T10A-E3/52, or SMBJ8.5A-13-F. For general-purpose applications where the -55°C minimum temperature is sufficient, all substitute parts are electrically equivalent within the specified 600W power envelope.

The SM6T10AY variant includes AEC-Q101 automotive qualification, suitable for automotive-grade applications requiring additional process and reliability certifications. The SMBJ8.5A-13-F from Diodes Incorporated and SMBJ8.5A variants from Taiwan Semiconductor Corporation provide the closest electrical match with clamping voltages of 14.4V.

Frequently Asked Questions (FAQ)

Q: Can I substitute a part with a different clamping voltage (14.4V vs. 15.9V vs. 18.6V)? A: Clamping voltage variations within the specified range are acceptable if the application circuit topology and protection requirements permit the variation. The 600W power dissipation rating is maintained across all variants. Verify that the lower clamping voltage (14.4V) does not exceed downstream component voltage tolerances and that the higher clamping voltage (18.6V) does not compromise circuit protection objectives.

Q: What is the impact of different peak pulse current ratings (37.7A, 41A, 42.1A, 43A, 215A)? A: All parts dissipate 600W peak pulse power. The differences in peak pulse current reflect different impedance characteristics. Higher current ratings (215A at 8/20µs) indicate lower clamping impedance. All ratings are compatible with standard TVS applications in the 8.5V class when the 600W power envelope is respected.

Q: Are there package differences between DO-214AA and SMB designations? A: Both designations refer to the same physical surface mount package. DO-214AA is the JEDEC standardized name; SMB is the commercial designation. All listed parts use this identical package with compatible footprint and soldering requirements.

Q: Does the reverse standoff voltage difference between 8.5V and 8.55V matter? A: The 0.05V difference is within standard tolerance for Zener-class TVS diodes and does not constitute a functional difference for circuit protection. Both voltage ratings are suitable for 8.5V-class applications.

Q: Why are some parts rated for -55°C minimum while others are rated for -65°C? A: The -65°C rating is a performance specification for extended low-temperature operation. Applications operating only above -55°C can use any listed substitute. Applications requiring operation down to -65°C must select SMBJ8.5E3/TR13, SM6T10A-E3/52, or SMBJ8.5A-13-F.

Q: What does ROHS3 Compliant mean versus RoHS Compliant? A: ROHS3 refers to RoHS Directive 2015/863/EU compliance including the restriction of four additional hazardous substances. RoHS refers to the original directive. Both designations indicate lead-free and compliant materials. ROHS3 compliance is preferred for current regulatory requirements.

Q: Is the SM6T10AY suitable for automotive applications? A: Yes. The SM6T10AY carries AEC-Q101 automotive qualification, indicating compliance with automotive reliability and quality standards. This part is suitable for automotive-grade circuit protection.

Q: What does MSL 1 (Unlimited) mean for component storage? A: MSL 1 indicates the lowest moisture sensitivity level, meaning the component has unlimited shelf life in standard moisture conditions and does not require special desiccated storage or baking procedures before soldering.