SMBJ28A-M3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ28A-M3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 28V reverse standoff category and is designed for general-purpose transient voltage protection applications. The part is Active status and fully compliant with RoHS3 and REACH regulations. Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the DO-214AA (SMB) package family.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	28	V
Voltage - Breakdown (Min)	31.1	V
Voltage - Clamping (Max) @ Ipp	45.4	V
Current - Peak Pulse (10/1000µs)	13.2	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	-
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the SMBJ28A-M3/5B are qualified based on the following electrical and mechanical parameters:

Voltage - Reverse Standoff (Typ): 28V
Voltage - Breakdown (Min): 31.1V minimum
Voltage - Clamping (Max) @ Ipp: 45.4V ±0.1V tolerance
Current - Peak Pulse (10/1000µs): 13.2A minimum
Power - Peak Pulse: 600W
Package / Case: DO-214AA or SMB equivalent
Mounting Type: Surface Mount
Operating Temperature: -55°C to 150°C minimum range
RoHS3 Compliance: Required

Parts meeting these criteria are electrically and mechanically interchangeable. Variations in peak pulse current (13.2A to 13.8A) and operating temperature upper limits (150°C to 175°C) represent performance enhancements and do not restrict substitution.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package	RoHS Status
SMBJ28A-M3/5B	Vishay General Semiconductor - Diodes Division	28V	31.1V	45.4V	13.2A	600W	-55 to 150°C	DO-214AA, SMB	ROHS3 Compliant
SMBJ28D-M3/I	Vishay General Semiconductor - Diodes Division	28V	31.6V	44.7V	13.4A	600W	-55 to 150°C	DO-214AA, SMB	ROHS3 Compliant
SMBJ28A-E3/5B	Vishay General Semiconductor - Diodes Division	28V	31.1V	45.5V	13.2A	600W	-55 to 150°C	DO-214AA, SMB	ROHS3 Compliant
SMBJ28A-13-F	Diodes Incorporated	28V	31.1V	45.4V	13.2A	600W	-55 to 150°C	DO-214AA, SMB	ROHS3 Compliant
SMBJ28A-TP	Micro Commercial Co	28V	31.1V	45.4V	13.2A	600W	-55 to 175°C	DO-214AA, SMB	ROHS3 Compliant
SMBJ28A	MDD	28V	31.1V	45.4V	13.3A	600W	-50 to 150°C	DO-214AA, SMB	ROHS3 Compliant
SMBJ28A-TR	STMicroelectronics	28V	31.1V	45.4V	13.8A	600W	-55 to 150°C	DO-214AA, SMB	ROHS3 Compliant
SZ1SMB28AT3G	Littelfuse Inc.	28V	31.1V	45.4V	13.2A	600W	-65 to 150°C	DO-214AA, SMB	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and full RoHS3 compliance. Selection among qualified substitutes should be based on:

Electrical Performance Match: SMBJ28A-E3/5B, SMBJ28A-13-F, SMBJ28A-TP, SMBJ28A-TR, and SZ1SMB28AT3G provide identical or superior electrical characteristics to the primary part SMBJ28A-M3/5B.

Temperature Range Considerations: SMBJ28A-TP extends the upper operating temperature to 175°C, suitable for high-temperature applications. SZ1SMB28AT3G extends the lower operating temperature to -65°C for extreme cold environments. SMBJ28A (MDD) operates from -50°C, which may be limiting for applications requiring -55°C minimum.

Packaging and Availability: All parts are available in DO-214AA (SMB) surface mount package. Packaging variants (Tape & Reel, Cut Tape, Digi-Reel) do not affect electrical or mechanical compatibility.

Automotive Grade: SZ1SMB28AT3G carries AEC-Q101 automotive qualification, suitable for automotive and mission-critical applications.

Frequently Asked Questions (FAQ)

Q: Can SMBJ28A-M3/5B be directly replaced with SMBJ28D-M3/I?

A: SMBJ28D-M3/I is electrically compatible. The clamping voltage is 44.7V versus 45.4V, and peak pulse current is 13.4A versus 13.2A. Both parameters remain within acceptable substitution tolerance for the 28V reverse standoff category.

Q: What is the difference between packaging designations like -M3/5B, -E3/5B, and -TP?

A: These designations indicate manufacturer-specific packaging and tape configurations (Tape & Reel variants). They do not affect electrical performance or mechanical compatibility in the DO-214AA (SMB) package.

Q: Is SZ1SMB28AT3G suitable for non-automotive applications?

A: Yes. SZ1SMB28AT3G meets all electrical and mechanical requirements for general-purpose applications. The AEC-Q101 automotive qualification is an additional certification that does not restrict use in non-automotive designs.

Q: Why does SMBJ28A (MDD) have a lower minimum operating temperature of -50°C?

A: This represents a specification difference from the primary part. If your application requires -55°C operation, select alternatives such as SMBJ28A-M3/5B, SMBJ28A-E3/5B, SMBJ28A-13-F, SMBJ28A-TP, SMBJ28A-TR, or SZ1SMB28AT3G.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant status and are suitable for applications requiring RoHS3 compliance.

Q: Can I use SMBJ28A-TP in place of SMBJ28A-M3/5B if my application operates at 175°C?

A: Yes. SMBJ28A-TP supports operating temperatures up to 175°C, providing enhanced thermal performance compared to the primary part's 150°C limit.

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