SMBG40-E3/52 Equivalent & Substitute Parts

Part Overview

The SMBG40-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 SMBG40-E3/52 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this TVS diode specification.

Substiute Parts

SMBG40-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 1055SMBG40-E3/52 Datasheet

Current PartRFQ

SMBG40A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 4060SMBG40A-E3/52 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMBG40-E3/52 is determined by the following critical parameters:

• Reverse Standoff Voltage: 40V (Typ)
• Breakdown Voltage: 44.4V (Min)
• Unidirectional channel configuration (1 channel)
• Package type: DO-215AA (SMB Gull Wing)
• Mounting type: Surface Mount
• Operating temperature range: -55°C ~ 150°C (TJ)
• RoHS3 compliance and MSL Level 1 rating

The SMBG40A-E3/52 qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. While the clamping voltage and peak pulse current differ from the main part, these variations remain within the allowable substitution criteria for the SMBG40 base product number and do not compromise functional compatibility in general-purpose TVS applications.

Parameter Comparison

Engineering Selection Recommendations

The SMBG40A-E3/52 is the recommended substitute for the obsolete SMBG40-E3/52. Both components share identical reverse standoff voltage, breakdown voltage, operating temperature range, and package specifications. The SMBG40A-E3/52 maintains active product status with Vishay, ensuring ongoing availability and supply chain support.

Both parts are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings, meeting equivalent environmental and regulatory requirements. The SMBG40A-E3/52 is available in Tape & Reel packaging, supporting automated assembly processes.

Selection of the SMBG40A-E3/52 eliminates obsolescence risk while maintaining full electrical and mechanical compatibility with existing designs specified for the SMBG40-E3/52.

Frequently Asked Questions (FAQ)

Q: Can the SMBG40A-E3/52 be used as a direct replacement for the SMBG40-E3/52?

A: Yes. Both components share the same reverse standoff voltage (40V), breakdown voltage (44.4V), operating temperature range (-55°C ~ 150°C), and DO-215AA package specification. The SMBG40A-E3/52 is the active equivalent.

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

A: The SMBG40-E3/52 has a maximum clamping voltage of 71.4V, while the SMBG40A-E3/52 has a maximum clamping voltage of 64.5V. Both remain within the SMBG40 base product specification and are functionally compatible for general-purpose TVS applications.

Q: Are there packaging differences between these parts?

A: The SMBG40-E3/52 packaging is not specified in the available data. The SMBG40A-E3/52 is supplied in Tape & Reel (TR) packaging, which is standard for automated assembly processes.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SMBG40-E3/52 and SMBG40A-E3/52 are ROHS3 compliant and carry MSL Level 1 (Unlimited) ratings. Both are classified as REACH Unaffected and carry the same ECCN and HTSUS codes.

Q: Why is the SMBG40-E3/52 listed as obsolete?

A: The SMBG40-E3/52 has been discontinued by Vishay. The SMBG40A-E3/52 is the active replacement within the TransZorb® SMBG40 product line.