MASMBG20A Equivalent & Substitute Parts

Part Overview

The MASMBG20A is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This surface-mount component operates across a temperature range of -65°C to 150°C and is qualified to MIL-PRF-19500 military standards. The device is currently in active production status with 771 pieces available in bulk packaging. Substitute parts are identified to provide alternative sourcing options with equivalent electrical and mechanical specifications, particularly for applications requiring different packaging formats or compliance certifications.

Substiute Parts

MASMBG20A

Microchip TechnologyIn Stock: 792MASMBG20A Datasheet

Current PartRFQ

SMBG20A-E3/52

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

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MASMBG20A is determined by strict equivalence across the following electrical and mechanical parameters:

• Voltage Rating: Reverse standoff voltage of 20V (Typ), breakdown voltage minimum of 22.2V, and clamping voltage maximum of 32.4V at peak pulse current
• Current Handling: Peak pulse current of 18.5A at 10/1000µs pulse width
• Power Dissipation: Peak pulse power rating of 600W
• Package Configuration: DO-215AA surface-mount package with SMB gull wing lead form
• Device Type: Unidirectional zener TVS diode with single channel
• Temperature Operating Range: Minimum -55°C to maximum 150°C junction temperature

The substitute part SMBG20A-E3/52 meets all electrical specifications and mechanical requirements. Differences in packaging format (Tape & Reel versus Bulk), RoHS compliance status, and operating temperature lower limit (-55°C versus -65°C) are noted but do not affect functional equivalence for applications within the overlapping temperature range.

Parameter Comparison

*Operating temperature lower limit differs by 10°C; upper limit and all electrical parameters are identical.

Engineering Selection Recommendations

MASMBG20A (Microchip Technology) is selected when:

• Military-grade qualification per MIL-PRF-19500 is required
• Operating temperature range of -65°C to 150°C is specified
• Bulk packaging format is preferred for manufacturing processes
• RoHS non-compliant status is acceptable for the application

SMBG20A-E3/52 (Vishay General Semiconductor) is selected when:

• ROHS3 compliance certification is required
• Tape & Reel packaging format is required for automated assembly
• Operating temperature range of -55°C to 150°C is acceptable
• TransZorb® series designation is preferred for documentation

Both parts are active products with confirmed inventory availability. Selection between these equivalents depends on compliance requirements, packaging format needs, and temperature specification boundaries rather than electrical performance, as all critical parameters are identical.

Frequently Asked Questions (FAQ)

Q: Can SMBG20A-E3/52 replace MASMBG20A in all applications?

A: SMBG20A-E3/52 provides electrical equivalence across all specified parameters. The primary consideration is the operating temperature lower limit: SMBG20A-E3/52 operates from -55°C minimum, while MASMBG20A operates from -65°C minimum. Substitution is valid for applications where the minimum operating temperature does not fall below -55°C.

Q: What is the difference between Bulk and Tape & Reel packaging?

A: Bulk packaging (MASMBG20A) supplies components in loose form, suitable for manual assembly or small-volume production. Tape & Reel packaging (SMBG20A-E3/52) supplies components on continuous tape for automated pick-and-place assembly equipment. Both formats contain identical components with identical electrical specifications.

Q: Does RoHS compliance affect electrical performance?

A: No. RoHS compliance is a material composition and environmental standard, not an electrical specification. ROHS3 compliance of SMBG20A-E3/52 and non-compliance of MASMBG20A do not alter voltage, current, or power ratings. Selection is based on regulatory requirements for the end application.

Q: Are the voltage and current ratings identical between these parts?

A: Yes. Both MASMBG20A and SMBG20A-E3/52 share identical electrical specifications: 20V reverse standoff voltage, 22.2V minimum breakdown voltage, 32.4V maximum clamping voltage, 18.5A peak pulse current, and 600W peak pulse power rating.

Q: What does the DO-215AA package designation mean?

A: DO-215AA is the standardized package outline for surface-mount diodes in SMB (gull wing lead) form factor. Both parts use this identical package, ensuring mechanical and thermal compatibility in PCB layouts.

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

A: Yes, provided the application temperature range does not require operation below -55°C. The identical DO-215AA package, lead spacing, and electrical specifications ensure direct substitution without PCB redesign or thermal analysis modification.