SMBJ45CAHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMBJ45CAHM3_A/I is a bidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 45V reverse standoff category and is designed for telecom applications requiring transient protection. The part is classified as obsolete, making identification of active equivalent alternatives essential for ongoing design support and procurement continuity.

Substiute Parts

SMBJ45CAHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 731SMBJ45CAHM3_A/I Datasheet

Current PartRFQ

SMBJ45CAHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 929SMBJ45CAHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ45CAHM3_A/I is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 45V
• Voltage - Breakdown (Min): 50V
• Voltage - Clamping (Max) @ Ipp: 72.7V
• Current - Peak Pulse (10/1000µs): 8.3A
• Power - Peak Pulse: 600W
• Bidirectional Channels: 1
• Package / Case: DO-214AA, SMB
• Operating Temperature Range: -55°C ~ 150°C (TJ)
• Grade: Automotive
• Qualification: AEC-Q101

The SMBJ45CAHM3_B/I is the manufacturer-recommended substitute, maintaining identical electrical specifications and mechanical compatibility while transitioning from obsolete to active product status.

Parameter Comparison

Engineering Selection Recommendations

The SMBJ45CAHM3_B/I is the direct substitute for the obsolete SMBJ45CAHM3_A/I. Both parts maintain identical electrical and mechanical specifications, including voltage ratings, current handling, power dissipation, and thermal operating range. Both components carry automotive-grade qualification (AEC-Q101) and ROHS3 compliance, ensuring regulatory and quality standards are preserved across the substitution.

The transition from SMBJ45CAHM3_A/I to SMBJ45CAHM3_B/I represents a product lifecycle update within the same manufacturer's TransZorb® series. The active status of the SMBJ45CAHM3_B/I ensures continued availability, technical support, and supply chain stability for new designs and production continuity.

Frequently Asked Questions (FAQ)

Q: Can SMBJ45CAHM3_B/I be used as a direct replacement for SMBJ45CAHM3_A/I?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters, including voltage ratings (45V reverse standoff, 50V breakdown minimum, 72.7V clamping maximum), current handling (8.3A peak pulse), power dissipation (600W), package type (DO-214AA SMB), and operating temperature range (-55°C to 150°C). Both carry AEC-Q101 automotive qualification and ROHS3 compliance.

Q: What is the difference between the SMBJ45CAHM3_A/I and SMBJ45CAHM3_B/I?

A: The primary difference is product status. The SMBJ45CAHM3_A/I is obsolete, while the SMBJ45CAHM3_B/I is active. No electrical or mechanical differences exist between the two parts.

Q: Are there packaging differences between these parts?

A: The SMBJ45CAHM3_A/I packaging is not specified in the provided data. The SMBJ45CAHM3_B/I is supplied in Tape & Reel (TR) packaging. Both use the DO-214AA (SMB) case format for surface mount assembly.

Q: Do both parts meet automotive standards?

A: Yes. Both SMBJ45CAHM3_A/I and SMBJ45CAHM3_B/I are automotive-grade components qualified to AEC-Q101 and are ROHS3 compliant.

Q: Which part should be selected for new designs?

A: The SMBJ45CAHM3_B/I should be selected for new designs due to its active product status, ensuring long-term availability and manufacturer support.