SMBG33A-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBG33A-M3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode from Vishay General Semiconductor - Diodes Division, part of the TransZorb® series. This surface-mount component is designed for general-purpose transient voltage suppression applications, offering a 33V reverse standoff voltage with a 53.3V maximum clamping voltage at peak pulse current. The part is currently active in production and RoHS3 compliant. Identifying equivalent substitute parts is necessary to ensure supply chain flexibility, optimize inventory management, and maintain design continuity when the primary part number becomes unavailable.

Substiute Parts

SMBG33A-M3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 767SMBG33A-M3/52 Datasheet

Current PartRFQ

SMBG33A-E3/52

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

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMBG33A-M3/52 is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 33V (Typ)
• Voltage - Breakdown: 36.7V (Min)
• Voltage - Clamping: 53.3V (Max) @ Ipp
• Current - Peak Pulse: 11.3A (10/1000µs)
• Power - Peak Pulse: 600W
• Package / Case: DO-215AA, SMB Gull Wing
• Mounting Type: Surface Mount
• Unidirectional Channels: 1

The SMBG33A-E3/52 meets all substitution criteria, maintaining identical electrical performance specifications and package configuration. Both parts are manufactured by Vishay General Semiconductor - Diodes Division within the TransZorb® series and share the same base product number (SMBG33).

Parameter Comparison

Engineering Selection Recommendations

Both the SMBG33A-M3/52 and SMBG33A-E3/52 are active production parts with full RoHS3 compliance and REACH unaffected status. The primary distinction between these parts is the operating temperature range: the main part supports -65°C to 175°C, while the substitute supports -55°C to 150°C. Selection between these parts should be based on the specific thermal requirements of the application. For applications operating within the -55°C to 150°C range, the SMBG33A-E3/52 provides an equivalent substitute with higher current inventory availability (12,200 pcs vs. 753 pcs). For applications requiring the extended lower temperature range (-65°C), the SMBG33A-M3/52 is the appropriate choice.

Frequently Asked Questions (FAQ)

Q: Can SMBG33A-E3/52 be used as a direct replacement for SMBG33A-M3/52?

A: The SMBG33A-E3/52 is a direct electrical equivalent with identical voltage and current specifications. However, the operating temperature range differs: SMBG33A-E3/52 operates from -55°C to 150°C, while SMBG33A-M3/52 operates from -65°C to 175°C. Substitution is valid only if your application operates within the -55°C to 150°C range.

Q: Are the package and mounting specifications identical?

A: Yes. Both parts use the DO-215AA (SMB Gull Wing) package and are surface-mount components. PCB layout and assembly processes remain unchanged between these parts.

Q: What is the difference between the M3 and E3 designations?

A: The M3 and E3 designations indicate different tape and reel configurations or manufacturing batches from Vishay. The electrical and mechanical specifications remain identical.

Q: Are both parts RoHS3 compliant?

A: Yes. Both SMBG33A-M3/52 and SMBG33A-E3/52 are RoHS3 compliant with MSL rating of 1 (Unlimited moisture sensitivity level).

Q: Which part should I select for new designs?

A: For new designs, either part is acceptable provided the application thermal requirements fall within -55°C to 150°C. The SMBG33A-E3/52 offers higher inventory availability. For applications requiring extended temperature range to -65°C or 175°C, the SMBG33A-M3/52 is required.