SMBG30A-M3/5B Equivalent & Substitute Parts

Part Overview

The SMBG30A-M3/5B 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. The part is currently active in production and widely used in circuit protection designs requiring fast response to voltage transients. Identifying equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and accommodate varying inventory availability across different packaging and manufacturing batches.

Substiute Parts

SMBG30A-M3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 861SMBG30A-M3/5B Datasheet

Current PartRFQ

SMBG30A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 12143SMBG30A-E3/52 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBG30A-M3/5B is determined by strict equivalence across the following critical parameters:

• Voltage Rating: Reverse standoff voltage of 30V, breakdown voltage minimum of 33.3V, and clamping voltage maximum of 48.4V must remain identical
• Current Handling: Peak pulse current of 12.4A (10/1000µs pulse) must be maintained
• Power Dissipation: Peak pulse power rating of 600W must be equivalent
• Package Specification: DO-215AA (SMB Gull Wing) surface-mount package is mandatory for mechanical and electrical compatibility
• Unidirectional Configuration: Single-channel Zener diode topology must be preserved
• Compliance Standards: RoHS3 compliance and MSL Level 1 rating must be maintained

The SMBG30A-E3/52 meets all these criteria and is classified as a direct substitute. Both parts share identical electrical specifications and packaging, with differences limited to manufacturing batch codes and tape-and-reel packaging configurations.

Parameter Comparison

Engineering Selection Recommendations

Both the SMBG30A-M3/5B and SMBG30A-E3/52 are active production parts from Vishay General Semiconductor - Diodes Division and maintain full RoHS3 compliance and REACH unaffected status. The parts are electrically and mechanically identical across all critical transient voltage suppression parameters.

The primary distinction is the operating temperature range: the SMBG30A-M3/5B supports -65°C to 175°C, while the SMBG30A-E3/52 operates within -55°C to 150°C. Selection between these parts should be based on the specific thermal requirements of the application. For applications requiring extended low-temperature operation below -55°C or sustained high-temperature operation above 150°C, the SMBG30A-M3/5B is the appropriate choice. For standard industrial and commercial temperature ranges, the SMBG30A-E3/52 provides equivalent protection with higher inventory availability.

Frequently Asked Questions (FAQ)

Q: Can SMBG30A-E3/52 be used as a direct replacement for SMBG30A-M3/5B in all applications?

A: The SMBG30A-E3/52 is a direct electrical and mechanical substitute for applications operating within the -55°C to 150°C temperature range. If your circuit operates outside this range, particularly below -55°C or above 150°C, the SMBG30A-M3/5B with its extended -65°C to 175°C range is required.

Q: Are there any package compatibility concerns between these parts?

A: No. Both parts use identical DO-215AA (SMB Gull Wing) surface-mount packaging. PCB footprints, solder reflow profiles, and mechanical mounting are fully compatible.

Q: What is the significance of the different batch codes (M3/5B versus E3/52)?

A: Batch codes indicate different manufacturing runs and tape-and-reel configurations from Vishay. The electrical and mechanical specifications remain identical. Batch codes do not affect functional performance or compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both SMBG30A-M3/5B and SMBG30A-E3/52 are RoHS3 compliant, REACH unaffected, and carry MSL Level 1 (unlimited moisture sensitivity) ratings.

Q: Which part should I specify for a new design?

A: Specify based on your application's operating temperature requirements. For designs requiring the full -65°C to 175°C range, use SMBG30A-M3/5B. For standard commercial and industrial applications within -55°C to 150°C, SMBG30A-E3/52 is suitable and typically offers better availability.