SMBJ28A-13 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SMBJ28A-13 is a unidirectional Zener transient voltage suppressor diode manufactured by Diodes Incorporated in SMB (DO-214AA) surface mount package. This component provides 28V reverse standoff voltage with 45.4V maximum clamping voltage and 13.2A peak pulse current capability for general purpose transient voltage suppression applications. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines that maintain identical electrical specifications and mechanical compatibility.

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	-
Type	Zener	-
Unidirectional Channels	1	-

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ28A-13 is determined by strict equivalence across the following critical parameters:

Voltage specifications: Reverse standoff voltage of 28V (typical), breakdown voltage minimum of 31.1V, and clamping voltage maximum of 45.4V must be maintained within the specified tolerances.

Current rating: Peak pulse current of 13.2A at 10/1000µs pulse duration and 600W peak pulse power dissipation capacity.

Package compatibility: Surface mount DO-214AA (SMB) package for PCB footprint and assembly process compatibility.

Electrical type: Unidirectional Zener diode configuration with single channel.

Operating temperature: Functional range of -55°C to 150°C junction temperature (or equivalent ambient temperature specification).

Substitute parts are grouped into two categories: direct electrical equivalents with identical specifications and alternative manufacturers offering the same performance envelope. Parts with minor variations in peak pulse current (13.3A or 13.8A) remain functionally equivalent within the application tolerance band for general purpose transient suppression. Parts with different package types (SOD-128) or operating temperature ranges outside the specified window are listed separately with engineering notes.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Clamping (Max) @ Ipp (V)	Current - Peak Pulse (A)	Package	Product Status	RoHS Status
SMBJ28A-13	Diodes Incorporated	28	45.4	13.2	DO-214AA, SMB	Discontinued	Non-compliant
SMBJ28A-13-F	Diodes Incorporated	28	45.4	13.2	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ28A-TP	Micro Commercial Co	28	45.4	13.2	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ28A	MDD	28	45.4	13.3	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ28A R5G	Taiwan Semiconductor Corporation	28	45.4	13.8	DO-214AA, SMB	Discontinued	ROHS3 Compliant
SMBJ28A-E3/52	Vishay General Semiconductor	28	45.5	13.2	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ28A-E3/5B	Vishay General Semiconductor	28	45.5	13.2	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ28A-Q	Bourns Inc.	28	45.4	13.3	DO-214AA, SMB	Active	ROHS3 Compliant
PTVS28VP1UP,115	Nexperia USA Inc.	28	45.4	13.2	SOD-128	Active	ROHS3 Compliant

Engineering Selection Recommendations

For direct replacement of SMBJ28A-13 in active production designs, SMBJ28A-13-F from Diodes Incorporated is the primary equivalent. This part maintains identical electrical specifications, operates within the same temperature range, and is available in active product status with ROHS3 compliance. Packaging is identical (DO-214AA, SMB), ensuring PCB footprint and assembly compatibility without design modification.

SMBJ28A-TP from Micro Commercial Co and SMBJ28A-E3/5B from Vishay General Semiconductor are functionally equivalent alternatives with active product status and ROHS3 compliance. Both maintain the 28V reverse standoff and 45.4V clamping specifications. SMBJ28A-TP supports extended operating temperature to 175°C, providing thermal margin for high-temperature applications. SMBJ28A-E3/5B exhibits 45.5V maximum clamping voltage, within acceptable tolerance for general purpose suppression.

SMBJ28A from MDD and SMBJ28A-Q from Bourns Inc. offer active alternatives with peak pulse current ratings of 13.3A, representing a 0.8% increase over the original 13.2A specification. Both maintain 45.4V clamping voltage and ROHS3 compliance. SMBJ28A-Q includes AEC-Q101 automotive qualification, suitable for automotive and telecom applications requiring enhanced reliability documentation.

PTVS28VP1UP,115 from Nexperia USA Inc. is a manufacturer-recommended alternative with identical electrical performance and AEC-Q101 automotive qualification. This part uses SOD-128 package instead of SMB, requiring PCB layout modification and different assembly handling. Selection of this part is appropriate only when SOD-128 package compatibility exists in the design.

Parts with discontinued status (SMBJ28A R5G) should not be selected for new designs despite ROHS3 compliance, as long-term supply availability cannot be assured.

Frequently Asked Questions (FAQ)

Q: Can SMBJ28A-13-F be used as a direct drop-in replacement for SMBJ28A-13?

A: Yes. SMBJ28A-13-F is manufactured by the same company (Diodes Incorporated) with identical electrical specifications (28V standoff, 45.4V clamping, 13.2A peak pulse), same package (DO-214AA, SMB), and same operating temperature range (-55°C to 150°C). The only difference is product status (active vs. discontinued) and RoHS compliance (ROHS3 vs. non-compliant). No design changes are required.

Q: What is the difference between SMBJ28A-13-F and SMBJ28A-TP?

A: Both parts are electrically equivalent with 28V standoff, 45.4V clamping, and 13.2A peak pulse current. SMBJ28A-13-F is from Diodes Incorporated with operating temperature -55°C to 150°C. SMBJ28A-TP is from Micro Commercial Co with extended operating temperature -55°C to 175°C. Selection depends on thermal requirements; SMBJ28A-TP provides additional margin for high-temperature environments. Both use SMB package and are ROHS3 compliant.

Q: Why is PTVS28VP1UP,115 listed as a substitute if it uses a different package?

A: PTVS28VP1UP,115 is included as a manufacturer-recommended alternative because it maintains identical electrical performance (28V standoff, 45.4V clamping, 13.2A peak pulse, 600W power dissipation) and includes AEC-Q101 automotive qualification. However, the SOD-128 package differs from the SMB package of the original part. This substitute is appropriate only for designs where SOD-128 package footprint is already implemented or where design modification is acceptable.

Q: Are parts with 13.3A or 13.8A peak pulse current acceptable substitutes?

A: Yes, for general purpose transient suppression applications. SMBJ28A from MDD and SMBJ28A-Q from Bourns Inc. both specify 13.3A peak pulse current, representing a 0.8% increase over the original 13.2A. SMBJ28A R5G specifies 13.8A, a 4.5% increase. All three maintain 45.4V clamping voltage and 600W power dissipation. The higher current ratings provide additional transient suppression margin and are functionally compatible with the original design intent.

Q: What does ROHS3 compliance mean for this component?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, hexavalent chromium, and certain flame retardants. The original SMBJ28A-13 is RoHS non-compliant. All active substitute parts listed are ROHS3 compliant, making them suitable for applications requiring environmental compliance and for new designs subject to RoHS regulations.

Q: Can I use SMBJ28A-E3/52 instead of SMBJ28A-E3/5B?

A: Yes. Both are from Vishay General Semiconductor with identical electrical specifications (28V standoff, 45.5V clamping, 13.2A peak pulse) and SMB package. The difference is packaging format: SMBJ28A-E3/52 is supplied in Cut Tape (CT) & Digi-Reel format, while SMBJ28A-E3/5B is supplied in Tape & Reel (TR) format. Selection depends on procurement and assembly requirements; both are electrically and mechanically interchangeable.

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