SMBJ40CAHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ40CAHM3_A/I is a bidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AA (SMB) package and is designed for telecom applications requiring transient voltage protection. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for continued system support and new design implementations.

Substiute Parts

SMBJ40CAHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1011SMBJ40CAHM3_A/I Datasheet

Current PartRFQ

SMBJ40CAHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 1138SMBJ40CAHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ40CAHM3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 40V (±5% tolerance)
• Voltage - Breakdown (Min): 44.4V
• Voltage - Clamping (Max) @ Ipp: 64.5V
• Current - Peak Pulse (10/1000µs): 9.3A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA (SMB)
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C ~ 150°C (TJ)
• Automotive Grade and AEC-Q101 Qualification

The SMBJ40CAHM3_B/I is the manufacturer-recommended substitute, sharing identical electrical specifications and package configuration while offering active product status and improved supply availability.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ40CAHM3_B/I is the direct equivalent for the obsolete SMBJ40CAHM3_A/I. Both parts maintain identical electrical performance specifications and automotive-grade certifications. The primary distinction is product lifecycle status: the SMBJ40CAHM3_A/I is obsolete, while the SMBJ40CAHM3_B/I is active with confirmed inventory availability. The SMBJ40CAHM3_B/I is supplied in Tape & Reel packaging, suitable for automated assembly processes. Both parts satisfy ROHS3 compliance and AEC-Q101 automotive qualification requirements, ensuring compatibility in regulated applications.

Frequently Asked Questions (FAQ)

Q: Can SMBJ40CAHM3_B/I be used as a direct replacement for SMBJ40CAHM3_A/I?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The SMBJ40CAHM3_B/I is the manufacturer-recommended active substitute with identical voltage ratings (40V standoff, 64.5V clamping), current handling (9.3A peak pulse), power dissipation (600W), and package configuration (DO-214AA SMB).

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

A: The primary difference is product status and packaging format. The SMBJ40CAHM3_A/I is obsolete and supplied in bulk packaging. The SMBJ40CAHM3_B/I is active production with Tape & Reel packaging for automated assembly. Electrical specifications and automotive qualifications are identical.

Q: Are both parts suitable for automotive applications?

A: Yes. Both the SMBJ40CAHM3_A/I and SMBJ40CAHM3_B/I carry automotive grade classification and AEC-Q101 qualification, meeting automotive industry reliability and quality standards.

Q: Does the packaging format affect circuit performance?

A: No. Tape & Reel packaging (SMBJ40CAHM3_B/I) and bulk packaging (SMBJ40CAHM3_A/I) contain identical components. Packaging format affects only handling, storage, and assembly processes, not electrical or thermal performance.

Q: Are there any compliance or certification differences?

A: No. Both parts are ROHS3 compliant and carry identical AEC-Q101 automotive qualification. Compliance status and certifications are equivalent.