SMBJ85CAHE3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ85CAHE3_A/I is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for surface mount applications in the DO-214AA (SMB) package. This component provides transient overvoltage protection with a reverse standoff voltage of 85V and peak pulse current handling of 4.4A. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability for new production and field service applications.

Substiute Parts

SMBJ85CAHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 927SMBJ85CAHE3_A/I Datasheet

Current PartRFQ

SMBJ85CAHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1075SMBJ85CAHE3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ85CAHE3_A/I is determined by strict equivalence across the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 85V
• Voltage - Breakdown (Min): 94.4V
• Voltage - Clamping (Max) @ Ipp: 137V
• Current - Peak Pulse (10/1000µs): 4.4A
• Power - Peak Pulse: 600W
• Bidirectional Channels: 1
• Type: Zener
• Package / Case: DO-214AA, SMB
• Operating Temperature Range: -55°C to 150°C (TJ)
• Grade: Automotive
• Qualification: AEC-Q101
• RoHS Status: ROHS3 Compliant

The substitute part SMBJ85CAHE3_B/I maintains identical electrical performance and mechanical compatibility while offering active product status and improved supply availability.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ85CAHE3_B/I is the direct equivalent substitute for the obsolete SMBJ85CAHE3_A/I. Both parts are manufactured by Vishay General Semiconductor - Diodes Division within the TransZorb® series and maintain identical electrical specifications and mechanical compatibility.

Selection of SMBJ85CAHE3_B/I is supported by:

• Active product status ensuring long-term supply chain availability
• Full compliance with AEC-Q101 automotive qualification
• ROHS3 compliance and REACH unaffected status
• Identical electrical performance across all critical parameters
• Surface mount DO-214AA (SMB) package compatibility
• Automotive-grade reliability classification

The substitute part is suitable for direct replacement in new designs and field service applications without circuit redesign or re-qualification.

Frequently Asked Questions (FAQ)

Q: Can SMBJ85CAHE3_B/I be used as a direct replacement for SMBJ85CAHE3_A/I?

A: Yes. Both parts are electrically and mechanically equivalent. The SMBJ85CAHE3_B/I maintains identical voltage ratings (85V reverse standoff, 137V clamping), current handling (4.4A peak pulse), power dissipation (600W), operating temperature range (-55°C to 150°C), and package configuration (DO-214AA SMB). Both are AEC-Q101 qualified automotive-grade components.

Q: What is the difference between SMBJ85CAHE3_A/I and SMBJ85CAHE3_B/I?

A: The primary difference is product status. SMBJ85CAHE3_A/I is obsolete, while SMBJ85CAHE3_B/I is active. The packaging differs slightly: SMBJ85CAHE3_A/I uses standard packaging, while SMBJ85CAHE3_B/I is supplied in Tape & Reel (TR) format. All electrical and mechanical specifications are identical.

Q: Are there any compatibility concerns when switching from SMBJ85CAHE3_A/I to SMBJ85CAHE3_B/I?

A: No compatibility concerns exist. Both parts use the identical DO-214AA (SMB) surface mount package with the same pinout and footprint. PCB layout and circuit design require no modification.

Q: What certifications and compliance standards apply to the substitute part?

A: SMBJ85CAHE3_B/I carries AEC-Q101 automotive qualification, ROHS3 compliance, and REACH unaffected status, matching the original part's compliance profile.

Q: Is the substitute part suitable for automotive applications?

A: Yes. SMBJ85CAHE3_B/I is classified as automotive-grade with AEC-Q101 qualification, making it suitable for automotive transient voltage suppression applications.