SMBJ28A M4G Equivalent & Substitute Parts

Part Overview

The SMBJ28A M4G is a unidirectional transient voltage suppressor (TVS) diode manufactured by Taiwan Semiconductor Corporation. This component is designed for general-purpose transient voltage protection in surface-mount applications using the DO-214AA (SMB) package. The device features a 28V reverse standoff voltage with a 45.4V maximum clamping voltage and 13.8A peak pulse current capability.

The SMBJ28A M4G is currently discontinued at DiGi Electronics. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

SMBJ28A M4G

Taiwan Semiconductor CorporationIn Stock: 1188SMBJ28A M4G Datasheet

Current PartRFQ

P6SMBJ28AS_R1_00001

Panjit International Inc.In Stock: 1941P6SMBJ28AS_R1_00001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMBJ28A M4G are identified based on strict electrical and mechanical parameter matching within the transient voltage suppressor category. The following parameters determine substitution eligibility:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 28V
• Voltage - Breakdown (Min): 31.1V
• Voltage - Clamping (Max) @ Ipp: 45.4V
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional (1 channel)
• Operating Temperature Range: -55°C to 150°C (TJ)

Acceptable Variation Parameters:

• Current - Peak Pulse (10/1000µs): Within 5% tolerance (13.1A to 14.5A range)
• Power - Peak Pulse: 600W (fixed specification)

Substitute parts must maintain identical voltage specifications and package form factor to ensure direct replacement capability in existing circuit designs and PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

The P6SMBJ28AS_R1_00001 manufactured by Panjit International Inc. is a direct electrical and mechanical equivalent to the discontinued SMBJ28A M4G. Both components share identical voltage specifications (28V reverse standoff, 31.1V breakdown minimum, 45.4V clamping maximum) and operate within the same temperature range (-55°C to 150°C).

The peak pulse current specification of the substitute part (13.3A) is within acceptable tolerance of the original part (13.8A), representing a 3.6% reduction. Both components maintain 600W peak pulse power dissipation and are housed in the DO-214AA (SMB) surface-mount package.

Compliance certifications are equivalent: both parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Moisture sensitivity levels are identical at MSL 1 (Unlimited).

The primary advantage of the P6SMBJ28AS_R1_00001 is its active product status with 1864 units in stock, compared to the discontinued status of the original part. The substitute part is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the P6SMBJ28AS_R1_00001 be used as a direct replacement for the SMBJ28A M4G?

A: Yes. Both components have identical voltage specifications (28V reverse standoff, 31.1V breakdown, 45.4V clamping), operate across the same temperature range, and use the same DO-214AA (SMB) package. The peak pulse current difference (13.3A vs. 13.8A) is within acceptable tolerance for general-purpose transient voltage suppression applications.

Q: What is the significance of the 0.5A difference in peak pulse current between the two parts?

A: The SMBJ28A M4G specifies 13.8A peak pulse current while the P6SMBJ28AS_R1_00001 specifies 13.3A. This 3.6% reduction does not affect substitution eligibility for circuits designed to the original specification, as the substitute part still meets the minimum current requirement and maintains identical power dissipation (600W).

Q: Are the package and mounting specifications identical?

A: Yes. Both parts use the DO-214AA (SMB) surface-mount package. The SMBJ28A M4G is supplied in standard packaging, while the P6SMBJ28AS_R1_00001 is supplied in Tape & Reel (TR) format. Both are compatible with standard PCB layouts and automated assembly equipment.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the SMBJ28A M4G and P6SMBJ28AS_R1_00001 are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Moisture sensitivity levels are identical at MSL 1 (Unlimited).

Q: Why is the original part discontinued?

A: The SMBJ28A M4G is discontinued at DiGi Electronics. The P6SMBJ28AS_R1_00001 remains in active production with current inventory availability, making it the appropriate substitute for ongoing design and production requirements.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. The electrical and mechanical specifications are equivalent, and both parts are housed in the same DO-214AA (SMB) package. No circuit modifications or PCB layout changes are required for substitution.