SMBG40A-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBG40A-E3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This component is part of the TransZorb® series and is designed for general-purpose transient voltage suppression applications. The device features a 40V reverse standoff voltage with a 64.5V maximum clamping voltage and is housed in a DO-215AA (SMB Gull Wing) surface mount package. The part maintains Active product status and is RoHS3 compliant. Equivalent and substitute parts are identified based on matching electrical performance parameters and compatible packaging specifications.

Substiute Parts

SMBG40A-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 1059SMBG40A-E3/5B Datasheet

Current PartRFQ

SMBJ40A-TR

STMicroelectronicsIn Stock: 3286SMBJ40A-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMBG40A-E3/5B is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 40V
• Voltage - Breakdown (Min): 44.4V
• Voltage - Clamping (Max) @ Ipp: 64.5V
• Current - Peak Pulse (10/1000µs): ≥9.3A
• Power - Peak Pulse: 600W
• Operating Temperature Range: -55°C to 150°C (TJ)
• Mounting Type: Surface Mount
• Package Compatibility: DO-215AA or DO-214AA (SMB variants)
• RoHS Status: ROHS3 Compliant

The SMBJ40A-TR qualifies as a manufacturer-recommended substitute. Both devices share identical voltage specifications (40V standoff, 44.4V breakdown, 64.5V clamping), equivalent power handling (600W peak pulse), and matching operating temperature ranges. The SMBJ40A-TR provides a marginally higher peak pulse current (9.7A vs. 9.3A), ensuring functional compatibility. Both components are surface mount, RoHS3 compliant, and utilize compatible SMB package variants (DO-215AA and DO-214AA respectively).

Parameter Comparison

Engineering Selection Recommendations

Both the SMBG40A-E3/5B and SMBJ40A-TR are Active product status components with full RoHS3 compliance and REACH unaffected status. Selection between these parts should be based on:

• Availability and lead time requirements
• PCB layout constraints related to SMB package variant (DO-215AA vs. DO-214AA)
• Supplier inventory and procurement channels
• Cost considerations

The SMBJ40A-TR offers a higher peak pulse current rating (9.7A), providing additional design margin over the SMBG40A-E3/5B (9.3A) while maintaining all other electrical specifications. Both components are suitable for general-purpose transient voltage suppression applications within the specified operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the SMBJ40A-TR directly replace the SMBG40A-E3/5B in existing designs?

A: Yes. Both devices share identical voltage specifications (40V standoff, 44.4V breakdown, 64.5V clamping), power ratings (600W peak pulse), and operating temperature ranges (-55°C to 150°C). The SMBJ40A-TR provides a higher peak pulse current rating, ensuring functional compatibility.

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

A: Both are SMB (Surface Mount) package variants used for TVS diodes. DO-215AA (Gull Wing) and DO-214AA (SMB) are mechanically and electrically compatible for most applications. Verify PCB footprint compatibility with your design specifications.

Q: Are both parts RoHS compliant?

A: Yes. Both the SMBG40A-E3/5B and SMBJ40A-TR are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What determines substitution eligibility for TVS diodes?

A: Substitution is based on matching reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, power dissipation, operating temperature range, and compatible packaging. All these parameters must align within acceptable tolerances.

Q: Can I use a substitute part with higher peak pulse current rating?

A: Yes. A substitute with a higher peak pulse current rating (9.7A vs. 9.3A) provides additional design margin and is functionally compatible, provided all other electrical and thermal specifications match.