SMBJ8.5CA Equivalent & Substitute Parts

Part Overview

The SMBJ8.5CA is an active-status transient voltage suppressor (TVS) diode manufactured by Taiwan Semiconductor Corporation. This surface-mount component operates as a unidirectional Zener diode in the DO-214AA (SMB) package, designed for general-purpose transient voltage suppression applications. The device maintains a reverse standoff voltage of 8.5V with a maximum clamping voltage of 14.4V at peak pulse current, delivering 600W peak pulse power dissipation. Identification of equivalent and substitute parts is necessary to support supply chain flexibility, inventory management, and design continuity across manufacturing environments.

Substiute Parts

SMBJ8.5CA

Taiwan Semiconductor CorporationIn Stock: 5444SMBJ8.5CA Datasheet

Current PartRFQ

SMBJ8.5CA

EVVO SemiIn Stock: 5517SMBJ8.5CA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ8.5CA is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - Reverse Standoff (Typ): 8.5V
• Voltage - Breakdown (Min): 9.44V
• Voltage - Clamping (Max) @ Ipp: 14.4V
• Power - Peak Pulse: 600W
• Bidirectional Channels: 1 (unidirectional operation)
• Type: Zener

Mechanical Equivalence Criteria:

• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount

Compliance Equivalence Criteria:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts must satisfy all electrical parameters within the specified tolerances and maintain identical mechanical packaging and surface-mount compatibility. Peak pulse current and operating temperature range variations are permitted within the constraints of the application environment.

Parameter Comparison

Engineering Selection Recommendations

Both the Taiwan Semiconductor Corporation SMBJ8.5CA and the EVVO Semi SMBJ8.5CA maintain active product status and full ROHS3 compliance. The devices are functionally equivalent across all critical voltage parameters: reverse standoff voltage, breakdown voltage, and clamping voltage specifications.

The EVVO Semi variant exhibits a peak pulse current rating of 41.7A compared to the Taiwan Semiconductor specification of 43A. This represents a 2.3% reduction in peak pulse current capacity. The EVVO Semi device provides an extended operating temperature range of -65°C to 150°C (TJ) versus the Taiwan Semiconductor range of -55°C to 150°C (TJ), offering improved low-temperature performance.

Both devices are packaged in DO-214AA (SMB) surface-mount configuration with identical moisture sensitivity classification (MSL 1, Unlimited). Selection between these parts is determined by application-specific requirements regarding peak pulse current capacity and low-temperature operating conditions. Both parts satisfy general-purpose transient voltage suppression applications with equivalent clamping performance and power dissipation capability.

Frequently Asked Questions (FAQ)

Q: Can the EVVO Semi SMBJ8.5CA directly replace the Taiwan Semiconductor SMBJ8.5CA in existing designs?

A: Direct substitution is supported for applications where the peak pulse current requirement does not exceed 41.7A. The EVVO Semi device maintains equivalent voltage specifications (8.5V standoff, 14.4V clamping) and identical package configuration (DO-214AA, SMB). Applications requiring the full 43A peak pulse current rating must retain the Taiwan Semiconductor part.

Q: Are there package compatibility differences between these parts?

A: Both devices utilize the DO-214AA (SMB) surface-mount package. Mechanical footprint, lead spacing, and PCB land pattern requirements are identical. No layout or assembly modifications are required when substituting between these parts.

Q: What is the significance of the operating temperature range difference?

A: The EVVO Semi SMBJ8.5CA operates from -65°C to 150°C (TJ), while the Taiwan Semiconductor version operates from -55°C to 150°C (TJ). The EVVO Semi device provides 10°C additional low-temperature capability. Selection depends on the minimum junction temperature requirement of the application environment.

Q: Do both parts meet the same compliance standards?

A: Both devices are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity classification. Compliance certifications are equivalent across both manufacturers.

Q: What is the impact of the 1.3A peak pulse current difference?

A: The EVVO Semi device is rated at 41.7A peak pulse current versus 43A for the Taiwan Semiconductor part. This 1.3A difference (2.3% reduction) affects the maximum transient energy the device can suppress. Applications with peak pulse current requirements below 41.7A are unaffected. Applications approaching or exceeding 41.7A require the Taiwan Semiconductor part to maintain specified performance margins.

Q: Are both parts available in the same packaging options?

A: The Taiwan Semiconductor SMBJ8.5CA is supplied in standard packaging. The EVVO Semi SMBJ8.5CA is available in Cut Tape (CT) and Digi-Reel® packaging options. Both support surface-mount assembly processes.