SMBG33-E3/52 Equivalent & Substitute Parts

Part Overview

The SMBG33-E3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This component is designed for general-purpose transient voltage suppression applications in surface-mount configurations using the DO-215AA (SMB) package. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement.

Substiute Parts

SMBG33-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 825SMBG33-E3/52 Datasheet

Current PartRFQ

SMBG33A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 12256SMBG33A-E3/52 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBG33-E3/52 is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 33V
• Voltage - Breakdown (Min): 36.7V
• Unidirectional Channels: 1
• Package / Case: DO-215AA, SMB Gull Wing
• Mounting Type: Surface Mount
• Operating Temperature Range: -55°C ~ 150°C (TJ)
• Series: TransZorb®
• Type: Zener

The SMBG33A-E3/52 qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. Variations in clamping voltage and peak pulse current remain within the functional tolerance of the 33V standoff voltage class and do not preclude substitution for general-purpose transient suppression applications.

Parameter Comparison

Engineering Selection Recommendations

The SMBG33A-E3/52 is the qualified substitute for the obsolete SMBG33-E3/52. Both components maintain identical compliance certifications (ROHS3 Compliant, REACH Unaffected) and share the same regulatory classification (ECCN: EAR99, HTSUS: 8541.10.0080). The substitute part carries active product status, ensuring long-term availability and supply chain continuity. The SMBG33A-E3/52 demonstrates improved peak pulse current capability (11.3A versus 10.2A) and lower clamping voltage (53.3V versus 59V), both favorable characteristics for transient suppression performance within the 33V standoff voltage class.

Frequently Asked Questions (FAQ)

Q: Can the SMBG33A-E3/52 be used as a direct replacement for the SMBG33-E3/52?

A: Yes. Both components share identical reverse standoff voltage (33V), breakdown voltage (36.7V), package type (DO-215AA), mounting configuration (surface mount), and operating temperature range (-55°C ~ 150°C). The substitute part is qualified for direct substitution in general-purpose transient voltage suppression applications.

Q: What is the difference in clamping voltage between these parts?

A: The SMBG33-E3/52 specifies a maximum clamping voltage of 59V at peak pulse current, while the SMBG33A-E3/52 specifies 53.3V. The lower clamping voltage of the substitute part represents improved performance for transient suppression within the same voltage class.

Q: Are there any package or mounting differences?

A: No. Both parts use the DO-215AA (SMB Gull Wing) package in surface-mount configuration. PCB footprints and assembly processes are identical.

Q: Why is the original part listed as obsolete?

A: The SMBG33-E3/52 is classified as obsolete by the manufacturer. The SMBG33A-E3/52 is the active product offering within the same TransZorb® series and voltage class, providing continued design support and procurement availability.

Q: Are compliance certifications identical?

A: Yes. Both parts are ROHS3 Compliant, REACH Unaffected, and carry the same regulatory classifications (ECCN: EAR99, HTSUS: 8541.10.0080). Moisture sensitivity level is identical at MSL 1 (Unlimited).