MXSMBG20AE3 Equivalent & Substitute Parts

Part Overview

The MXSMBG20AE3 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Microchip Technology. This surface mount component is designed for general-purpose transient voltage suppression applications, featuring a 20V reverse standoff voltage and 32.4V maximum clamping voltage. The device is classified as military-grade and qualified to MIL-PRF-19500 standards. As an active product with 918 units in stock, the MXSMBG20AE3 remains available; however, identifying equivalent substitute parts is essential for supply chain flexibility, design optimization, and sourcing alternatives when primary inventory becomes constrained.

Substiute Parts

MXSMBG20AE3

Microchip TechnologyIn Stock: 996MXSMBG20AE3 Datasheet

Current PartRFQ

SMBG20A-E3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 3849SMBG20A-E3/52 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MXSMBG20AE3 are identified based on strict electrical and mechanical parameter equivalence. The following criteria determine substitution eligibility:

Electrical Parameters (Must Match):

• Voltage - Reverse Standoff (Typ): 20V
• Voltage - Breakdown (Min): 22.2V
• Voltage - Clamping (Max) @ Ipp: 32.4V
• Current - Peak Pulse (10/1000µs): 18.5A
• Power - Peak Pulse: 600W
• Type: Zener
• Unidirectional Channels: 1

Mechanical Parameters (Must Match):

• Package / Case: DO-215AA, SMB Gull Wing
• Mounting Type: Surface Mount
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variations:

• Operating Temperature range may differ within the specified limits
• Packaging format (bulk vs. Tape & Reel) does not affect electrical substitution
• RoHS compliance status does not affect functional substitution
• Manufacturer and series designation do not affect electrical substitution

The SMBG20A-E3/52 manufactured by Vishay General Semiconductor - Diodes Division meets all electrical and mechanical substitution criteria for the MXSMBG20AE3.

Parameter Comparison

*Operating temperature range differs at the lower limit. The SMBG20A-E3/52 operates from -55°C minimum, while the MXSMBG20AE3 operates from -65°C minimum. Applications requiring operation below -55°C must use the MXSMBG20AE3.

Engineering Selection Recommendations

Primary Part: MXSMBG20AE3 (Microchip Technology)

The MXSMBG20AE3 is recommended for applications requiring military-grade qualification and extended low-temperature operation (-65°C). This part carries MIL-PRF-19500 qualification and is classified as military-grade. The MXSMBG20AE3 is RoHS non-compliant, which may be a requirement for legacy or military applications.

Substitute Part: SMBG20A-E3/52 (Vishay General Semiconductor)

The SMBG20A-E3/52 is a direct electrical and mechanical equivalent suitable for applications where military qualification is not required and operating temperatures remain above -55°C. This part is ROHS3 compliant, making it suitable for commercial and industrial applications with RoHS requirements. The SMBG20A-E3/52 is available in Tape & Reel packaging and has higher inventory availability (3822 units in stock).

Selection Criteria:

• Use MXSMBG20AE3 for military applications, MIL-PRF-19500 compliance requirements, or operation below -55°C
• Use SMBG20A-E3/52 for commercial applications, RoHS3 compliance requirements, or standard industrial temperature ranges
• Both parts are functionally equivalent for transient voltage suppression in the specified electrical operating range

Frequently Asked Questions (FAQ)

Q: Can the SMBG20A-E3/52 replace the MXSMBG20AE3 in all applications?

A: The SMBG20A-E3/52 is electrically and mechanically equivalent for applications operating within the temperature range of -55°C to 150°C. Applications requiring operation below -55°C or military-grade MIL-PRF-19500 qualification must use the MXSMBG20AE3.

Q: What is the difference in packaging between these two parts?

A: The MXSMBG20AE3 is supplied in standard packaging format, while the SMBG20A-E3/52 is supplied in Tape & Reel (TR) format. Both use the same DO-215AA (SMB Gull Wing) package case. Tape & Reel packaging is suitable for automated assembly processes and does not affect electrical performance.

Q: Are there RoHS compliance differences between these parts?

A: Yes. The MXSMBG20AE3 is RoHS non-compliant, while the SMBG20A-E3/52 is ROHS3 compliant. For applications subject to RoHS regulations, the SMBG20A-E3/52 is the appropriate choice.

Q: Do both parts have the same moisture sensitivity level?

A: Yes. Both the MXSMBG20AE3 and SMBG20A-E3/52 have Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture bake requirements.

Q: What are the key electrical parameters that must match for substitution?

A: The critical parameters are: Voltage - Reverse Standoff (20V), Voltage - Breakdown (22.2V minimum), Voltage - Clamping (32.4V maximum), Current - Peak Pulse (18.5A), and Power - Peak Pulse (600W). All substitute parts must match these specifications exactly.

Q: Can these parts be used interchangeably on the same PCB?

A: Yes, both parts use the same DO-215AA (SMB Gull Wing) surface mount package and have identical footprints. They can be used interchangeably on the same PCB layout, provided temperature and compliance requirements are met.

Q: What is the base product number for these parts?

A: The base product number for both the MXSMBG20AE3 and SMBG20A-E3/52 is SMBG20, indicating they are variants of the same core TVS diode design with 20V standoff voltage.