SMBG20A-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBG20A-E3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates within the TransZorb® series and is designed for general-purpose transient voltage suppression applications. The part is currently in active production status with 865 units available in inventory. Alternative equivalent parts may be required due to supply chain considerations, packaging preferences, or application-specific mounting requirements.

Substiute Parts

SMBG20A-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 913SMBG20A-E3/5B Datasheet

Current PartRFQ

SMBJ20A-TR

STMicroelectronicsIn Stock: 2880SMBJ20A-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBG20A-E3/5B is determined by the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 20V
• Voltage - Breakdown (Min): 22.2V
• Voltage - Clamping (Max) @ Ipp: 32.4V
• Current - Peak Pulse (10/1000µs): minimum 18.5A
• Power - Peak Pulse: 600W
• Operating Temperature Range: -55°C to 150°C
• Mounting Type: Surface Mount
• RoHS3 Compliance

The SMBJ20A-TR from STMicroelectronics meets all specified electrical parameters and compliance requirements. Both components operate within identical voltage specifications and temperature ranges. The primary difference lies in packaging format and supplier device package designation, with the SMBJ20A-TR utilizing DO-214AA (SMB) packaging compared to the DO-215AA (SMB Gull Wing) of the original part.

Parameter Comparison

Engineering Selection Recommendations

Both the SMBG20A-E3/5B and SMBJ20A-TR are active production components with ROHS3 compliance and unlimited moisture sensitivity ratings. The SMBJ20A-TR provides equivalent electrical performance with a marginally higher peak pulse current rating (19.4A versus 18.5A), maintaining full compatibility with the specified 600W power dissipation requirement.

Selection between these parts should be based on:

• PCB layout and footprint compatibility with DO-215AA versus DO-214AA package geometries
• Supplier availability and lead time requirements
• Packaging format preference (Tape & Reel versus Cut Tape & Digi-Reel®)
• Inventory management and procurement strategy

Both components satisfy identical electrical specifications, temperature operating ranges, and regulatory compliance requirements for general-purpose transient voltage suppression applications.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ20A-TR directly replace the SMBG20A-E3/5B in existing designs?

A: Electrical compatibility is confirmed across all specified parameters. Physical compatibility depends on PCB footprint design. The DO-215AA (SMB Gull Wing) and DO-214AA (SMB) packages have different lead configurations and may require footprint verification before implementation.

Q: What is the difference between DO-215AA and DO-214AA packages?

A: Both are SMB surface mount packages. DO-215AA features gull wing leads, while DO-214AA uses standard SMB lead geometry. Mechanical dimensions and PCB pad layouts differ between these package types.

Q: Are both parts RoHS compliant?

A: Yes. Both the SMBG20A-E3/5B and SMBJ20A-TR are ROHS3 compliant with REACH unaffected status.

Q: Does the higher peak pulse current of the SMBJ20A-TR (19.4A) affect circuit design?

A: No. The higher current rating provides additional margin within the same 600W power dissipation specification and does not require circuit modifications.

Q: What is the moisture sensitivity level for both parts?

A: Both components are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Are both parts suitable for general-purpose transient voltage suppression?

A: Yes. Both components are designated for general-purpose applications with identical voltage specifications and operating temperature ranges.