SMBJ40AHE3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ40AHE3_A/I is a unidirectional 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 40V reverse standoff voltage and 64.5V maximum clamping voltage. The part is currently listed as obsolete, making identification of equivalent and substitute components essential for ongoing design support and procurement.

Substiute Parts

SMBJ40AHE3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 889SMBJ40AHE3_A/I Datasheet

Current PartRFQ

SMBJ40AHE3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1015SMBJ40AHE3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ40AHE3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 40V (±5% tolerance)
• Voltage - Clamping (Max) @ Ipp: 64.5V
• Current - Peak Pulse (10/1000µs): 9.3A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Unidirectional Channels: 1
• Operating Temperature Range: -55°C to 150°C (TJ)
• Automotive Grade with AEC-Q101 Qualification
• RoHS3 Compliance

The SMBJ40AHE3_B/I meets all these criteria and is classified as the manufacturer-recommended substitute. The primary distinction is packaging format (Tape & Reel vs. standard packaging) and active product status, which ensures continued availability and manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ40AHE3_B/I is the direct substitute for the obsolete SMBJ40AHE3_A/I. Both components are manufactured by Vishay and share identical electrical specifications, automotive-grade qualification (AEC-Q101), and RoHS3 compliance. The substitute maintains full compatibility with existing circuit designs and PCB layouts due to identical package geometry (DO-214AA, SMB).

The transition from the obsolete SMBJ40AHE3_A/I to the active SMBJ40AHE3_B/I is supported by:

• Identical voltage and current ratings
• Matching thermal operating range
• Equivalent automotive qualification status
• Consistent RoHS and regulatory compliance
• Continued manufacturing support and availability

The primary difference is packaging format. The SMBJ40AHE3_B/I is supplied in Tape & Reel format, which is standard for high-volume production environments. No circuit redesign or re-qualification is required for this substitution.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ40AHE3_B/I be used as a direct replacement for the SMBJ40AHE3_A/I?

A: Yes. Both parts are electrically and mechanically identical. The SMBJ40AHE3_B/I is the manufacturer-recommended substitute with active product status, ensuring continued availability and manufacturing support.

Q: Are there any differences in electrical performance between these parts?

A: No. Both components have identical voltage ratings (40V reverse standoff, 64.5V clamping), current ratings (9.3A peak pulse), and power dissipation (600W peak pulse). Operating temperature ranges and thermal characteristics are equivalent.

Q: What is the difference between the packaging formats?

A: The SMBJ40AHE3_A/I uses standard packaging, while the SMBJ40AHE3_B/I is supplied in Tape & Reel (TR) format. Tape & Reel packaging is optimized for automated assembly processes and high-volume production. Both formats use the same DO-214AA (SMB) component package with identical PCB footprints.

Q: Are both parts automotive-qualified?

A: Yes. Both the SMBJ40AHE3_A/I and SMBJ40AHE3_B/I carry automotive-grade classification with AEC-Q101 qualification, meeting automotive industry reliability and quality standards.

Q: Is RoHS compliance maintained with the substitute?

A: Yes. The SMBJ40AHE3_B/I is ROHS3 compliant, matching the compliance status of the original part.

Q: Why is the original part listed as obsolete?

A: The SMBJ40AHE3_A/I is obsolete due to standard product lifecycle management. The SMBJ40AHE3_B/I represents the current active equivalent in the TransZorb® product line, ensuring long-term availability and manufacturing continuity.