SMBJ8.5CD-M3/H Equivalent & Substitute Parts

Part Overview

The SMBJ8.5CD-M3/H is a Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface mount component operates in the DO-214AA (SMB) package and provides transient voltage protection for general-purpose applications. The device is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this product category.

Substiute Parts

SMBJ8.5CD-M3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 1218SMBJ8.5CD-M3/H Datasheet

Current PartRFQ

SMBJ8.5CA-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 60121SMBJ8.5CA-E3/52 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ8.5CD-M3/H is determined by the following critical parameters:

• Reverse Standoff Voltage (Vwm): Must be 8.5V to maintain circuit protection threshold consistency
• Clamping Voltage (Vc): Maximum allowable value at peak pulse current; substitute must not exceed 14.3V to ensure adequate transient suppression
• Peak Pulse Current (Ipp): Minimum 42.2A at 10/1000µs waveform; substitute must meet or exceed this specification
• Peak Pulse Power: 600W rating must be maintained
• Package and Mounting: DO-214AA (SMB) surface mount package is mandatory for mechanical and thermal compatibility
• Temperature Range: Operating range of -55°C to 150°C (TJ) must be supported
• Bidirectional Configuration: Single channel (1) bidirectional topology required

The SMBJ8.5CA-E3/52 meets all substitution criteria within these parameter boundaries.

Parameter Comparison

Engineering Selection Recommendations

Both the SMBJ8.5CD-M3/H and SMBJ8.5CA-E3/52 are active production components manufactured by Vishay General Semiconductor - Diodes Division within the TransZorb® series. Both devices maintain ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement.

The SMBJ8.5CA-E3/52 is the manufacturer-recommended substitute and demonstrates equivalent electrical performance across all critical parameters. The clamping voltage differential of 0.1V (14.4V vs. 14.3V) and peak pulse current variance of 0.5A (41.7A vs. 42.2A) remain within acceptable engineering tolerances for general-purpose transient voltage suppression applications. Both components support identical operating temperature ranges and packaging specifications.

Selection between these parts may be determined by inventory availability, lead time requirements, or procurement channel preferences, as both satisfy the electrical and mechanical requirements for direct substitution in DO-214AA surface mount applications.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ8.5CA-E3/52 be used as a direct replacement for the SMBJ8.5CD-M3/H?

A: Yes. Both components share identical reverse standoff voltage (8.5V), package type (DO-214AA, SMB), mounting configuration (surface mount), and operating temperature range (-55 to 150°C TJ). The electrical parameters remain within compatible tolerances for general-purpose TVS applications.

Q: What is the significance of the clamping voltage difference between these parts?

A: The SMBJ8.5CD-M3/H specifies a maximum clamping voltage of 14.3V, while the SMBJ8.5CA-E3/52 specifies 14.4V. This 0.1V variance is within normal manufacturing tolerance for TVS diodes and does not affect functional compatibility in transient suppression circuits.

Q: Are there any package or mounting differences between these substitutes?

A: No. Both components use the DO-214AA (SMB) surface mount package with identical mechanical and thermal characteristics. PCB layout and reflow soldering parameters remain unchanged.

Q: Do both parts meet current compliance standards?

A: Yes. Both the SMBJ8.5CD-M3/H and SMBJ8.5CA-E3/52 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component use.

Q: What determines whether a part qualifies as a substitute for the SMBJ8.5CD-M3/H?

A: Substitution eligibility is based on matching reverse standoff voltage (8.5V), maintaining peak pulse current capability (minimum 42.2A), supporting peak pulse power (600W), using identical package type (DO-214AA, SMB), and supporting the full operating temperature range (-55 to 150°C TJ). All parameters must align within acceptable engineering tolerances.