SMBJ70AHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ70AHM3_A/I is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for telecom applications requiring transient voltage protection. This component features a 70V reverse standoff voltage with a 113V maximum clamping voltage and 5.3A peak pulse current capability in a surface mount DO-214AA (SMB) package. The part is classified as obsolete, making identification of active equivalent alternatives essential for ongoing design support and procurement.

Substiute Parts

SMBJ70AHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 999SMBJ70AHM3_A/I Datasheet

Current PartRFQ

SMBJ70AHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 775SMBJ70AHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ70AHM3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage Rating: Reverse standoff voltage of 70V, breakdown minimum of 77.8V, and clamping voltage maximum of 113V must remain identical
• Current Handling: Peak pulse current of 5.3A (10/1000µs pulse) must be maintained
• Power Dissipation: Peak pulse power rating of 600W must be preserved
• Package Compatibility: Surface mount DO-214AA (SMB) package required for mechanical and thermal compatibility
• Electrical Type: Unidirectional Zener TVS diode configuration with single channel
• Compliance: AEC-Q101 automotive qualification and ROHS3 compliance required
• Operating Temperature: Full range of -55°C to 150°C (TJ) must be supported

The SMBJ70AHM3_B/I meets all substitution criteria as an active product variant within the same TransZorb® series, differing only in packaging format (Tape & Reel) and product status (Active vs. Obsolete).

Parameter Comparison

Engineering Selection Recommendations

The SMBJ70AHM3_B/I is the direct functional equivalent of the SMBJ70AHM3_A/I. Both components share identical electrical specifications, thermal performance, and mechanical compatibility. The primary distinction is product lifecycle status: the SMBJ70AHM3_A/I is obsolete, while the SMBJ70AHM3_B/I maintains active production status.

For new designs or ongoing procurement, the SMBJ70AHM3_B/I is the appropriate selection. Both parts maintain AEC-Q101 automotive qualification and ROHS3 compliance, ensuring regulatory and quality standards are preserved. The packaging format difference (Tape & Reel for the substitute) does not affect electrical or thermal performance and is a standard industry variation for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ70AHM3_B/I be used as a direct replacement for the SMBJ70AHM3_A/I?

A: Yes. Both components are electrically and mechanically identical, with matching voltage ratings (70V standoff, 113V clamping), current handling (5.3A peak pulse), power dissipation (600W), operating temperature range (-55°C to 150°C), and package specifications (DO-214AA SMB). The substitute is an active product variant.

Q: What is the difference between the two part numbers?

A: The SMBJ70AHM3_A/I and SMBJ70AHM3_B/I differ in product status and packaging format. The A/I variant is obsolete, while the B/I variant is active production. The B/I variant is supplied in Tape & Reel format, standard for high-volume manufacturing.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain identical AEC-Q101 automotive qualification, ROHS3 compliance, and REACH unaffected status. Regulatory and quality requirements are fully preserved with the substitute.

Q: Is the DO-214AA (SMB) package identical between both parts?

A: Yes. Both components use the same surface mount DO-214AA (SMB) package, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: What applications are these components suitable for?

A: Both the SMBJ70AHM3_A/I and SMBJ70AHM3_B/I are designed for telecom applications requiring transient voltage suppression with 70V protection levels.