SMBJ70CAHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ70CAHM3_A/I is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for telecom applications requiring transient protection. This component features a 70V reverse standoff voltage with 113V maximum clamping voltage and 5.3A peak pulse current capability in a surface mount DO-214AA (SMB) package. The part is currently classified as obsolete, making identification of active equivalent substitutes essential for ongoing design support and procurement.

Substiute Parts

SMBJ70CAHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 854SMBJ70CAHM3_A/I Datasheet

Current PartRFQ

SMBJ70CAHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1078SMBJ70CAHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ70CAHM3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 70V
• Voltage - Breakdown (Min): 77.8V
• Voltage - Clamping (Max) @ Ipp: 113V
• Current - Peak Pulse (10/1000µs): 5.3A
• Power - Peak Pulse: 600W
• Bidirectional Channels: 1
• Package / Case: DO-214AA, SMB
• Operating Temperature Range: -55°C ~ 150°C (TJ)
• Type: Zener
• Series: TransZorb®

The SMBJ70CAHM3_B/I is a direct substitute manufactured by the same supplier within the same product series. Both parts share identical electrical specifications and thermal characteristics. The primary distinction is product status: the substitute part is active and available, whereas the original part is obsolete. The packaging format differs only in delivery method (Tape & Reel for the substitute versus unspecified for the original), which does not affect electrical or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ70CAHM3_B/I is the direct substitute for the obsolete SMBJ70CAHM3_A/I. Both parts maintain identical electrical and thermal performance specifications, automotive-grade qualification (AEC-Q101), and regulatory compliance (ROHS3, REACH Unaffected). The substitute part is currently active and available in inventory, whereas the original part is obsolete. For new designs or ongoing production requiring transient voltage suppression at 70V standoff with 600W peak pulse power handling, the SMBJ70CAHM3_B/I provides equivalent functionality with assured supply continuity. No design modifications are required for substitution.

Frequently Asked Questions (FAQ)

Q: Can SMBJ70CAHM3_B/I be used as a direct replacement for SMBJ70CAHM3_A/I?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The substitute part is the manufacturer-recommended replacement for the obsolete original part.

Q: Are there any differences in package specifications between these parts?

A: Both parts use the DO-214AA (SMB) surface mount package. The only difference is the delivery format: the substitute is supplied in Tape & Reel (TR) packaging, which does not affect electrical performance or PCB assembly compatibility.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both the original and substitute parts carry Automotive grade classification and AEC-Q101 qualification, suitable for automotive transient protection applications.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution is based on matching: 70V reverse standoff voltage, 77.8V minimum breakdown voltage, 113V maximum clamping voltage, 5.3A peak pulse current, and 600W peak pulse power rating. Both parts are identical in these specifications.

Q: Is the substitute part compliant with current environmental regulations?

A: Yes. The SMBJ70CAHM3_B/I is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.