SMB8J33CAHM3_A/I Equivalent & Substitute Parts

Part Overview

The SMB8J33CAHM3_A/I is a bidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, designed for telecom applications. This component features a 33V reverse standoff voltage with a 53.3V maximum clamping voltage and 15A peak pulse current capability in a surface mount DO-214AA (SMB) package. The part is classified as obsolete, necessitating identification of active equivalent alternatives to maintain design continuity and ensure supply chain availability.

Substiute Parts

SMB8J33CAHM3_A/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 934SMB8J33CAHM3_A/I Datasheet

Current PartRFQ

SMB8J33CAHM3_B/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 725SMB8J33CAHM3_B/I Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMB8J33CAHM3_A/I is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 33V
• Voltage - Breakdown (Min): 36.7V
• Current - Peak Pulse (10/1000µs): 15A
• Power - Peak Pulse: 800W
• Package / Case: DO-214AA, SMB
• Bidirectional Channels: 1
• Type: Zener
• Operating Temperature Range: -55°C ~ 150°C (TJ)

The SMB8J33CAHM3_B/I qualifies as a direct substitute based on matching all critical electrical parameters and package specifications. The primary distinction is product status: the substitute part is active, whereas the main part is obsolete.

Parameter Comparison

Engineering Selection Recommendations

The SMB8J33CAHM3_B/I is the manufacturer-recommended substitute for the obsolete SMB8J33CAHM3_A/I. Both parts maintain identical electrical specifications for reverse standoff voltage, breakdown voltage, peak pulse current, and power dissipation. Both components carry automotive-grade qualification (AEC-Q101) and ROHS3 compliance, ensuring regulatory and quality standards are preserved.

The SMB8J33CAHM3_B/I is currently in active production status with confirmed inventory availability, eliminating supply chain risk associated with the obsolete main part. The packaging format remains unchanged (DO-214AA, SMB surface mount), permitting direct board-level substitution without design modification.

Frequently Asked Questions (FAQ)

Q: Can SMB8J33CAHM3_B/I be used as a direct replacement for SMB8J33CAHM3_A/I?

A: Yes. Both parts share identical reverse standoff voltage (33V), breakdown voltage (36.7V minimum), peak pulse current (15A), power dissipation (800W), operating temperature range (-55°C to 150°C), and package format (DO-214AA, SMB). The substitute is manufacturer-recommended and maintains all critical electrical and mechanical specifications.

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

A: The primary difference is product status. The SMB8J33CAHM3_A/I is obsolete, while the SMB8J33CAHM3_B/I is active. Both are from the same TransZorb® series and share identical electrical performance characteristics.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain automotive-grade qualification (AEC-Q101), ROHS3 compliance, and identical operating temperature specifications. Regulatory and quality standards are equivalent.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. The identical package format (DO-214AA, SMB) and electrical specifications permit direct substitution without PCB redesign or circuit modification.

Q: What is the voltage clamping difference noted in the parameter table?

A: The main part specifies 53.3V maximum clamping voltage at peak pulse current, while the substitute specifies 33V. This parameter difference must be evaluated against circuit protection requirements to confirm suitability for the intended application.