SMBJ28A-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ28A-E3/5B 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 in production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical performance parameters and package compatibility within the DO-214AA (SMB) form factor.

Substiute Parts

SMBJ28A-E3/5B

Vishay General Semiconductor - Diodes DivisionIn Stock: 2996SMBJ28A-E3/5B Datasheet

Current PartRFQ

SMBJ28D-M3/I

Vishay General Semiconductor - Diodes DivisionIn Stock: 10515SMBJ28D-M3/I Datasheet

DirectRFQ

SMBJ28A

MDDIn Stock: 86400SMBJ28A Datasheet

MFR RecommendedRFQ

SMBJ28A

MDDIn Stock: 86400SMBJ28A Datasheet

MFR RecommendedRFQ

SMBJ28A

MDDIn Stock: 86400SMBJ28A Datasheet

MFR RecommendedRFQ

SMBJ28A-13-F

Diodes IncorporatedIn Stock: 20113SMBJ28A-13-F Datasheet

MFR RecommendedRFQ

SMBJ28A-TP

Micro Commercial CoIn Stock: 30424SMBJ28A-TP Datasheet

MFR RecommendedRFQ

SMBJ28A-TR

STMicroelectronicsIn Stock: 12726SMBJ28A-TR Datasheet

MFR RecommendedRFQ

SZ1SMB28AT3G

Littelfuse Inc.In Stock: 144063SZ1SMB28AT3G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ28A-E3/5B is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 28V
• Voltage - Breakdown (Min): 31.1V minimum
• Voltage - Clamping (Max) @ Ipp: 45.5V maximum
• Current - Peak Pulse (10/1000µs): 13.2A minimum
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• RoHS3 Compliance: Required

All identified substitute parts maintain these core electrical specifications within acceptable engineering tolerances and share identical package geometry and mounting characteristics. Substitutes are grouped by manufacturer and part number designation while preserving functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain active production status and full RoHS3 compliance. Selection among equivalent parts should be based on:

Manufacturer Availability: SMBJ28A-TP (Micro Commercial Co) offers the widest operating temperature range (-55 to 175°C), providing extended thermal margin for applications requiring higher temperature performance. SZ1SMB28AT3G (Littelfuse) includes AEC-Q101 automotive qualification and extended low-temperature operation (-65°C), suitable for automotive and harsh environment applications.

Electrical Performance Margin: SMBJ28A-TR (STMicroelectronics) provides the highest peak pulse current rating (13.8A), offering additional current handling capacity. SMBJ28D-M3/I (Vishay) exhibits the lowest clamping voltage (44.7V), providing tighter voltage regulation if required by circuit design.

Supply Chain Considerations: SZ1SMB28AT3G maintains the highest inventory level (143,959 pcs), ensuring supply continuity. SMBJ28A (MDD) offers substantial stock (86,300 pcs) with equivalent electrical specifications to the primary part.

All parts share identical package geometry (DO-214AA, SMB) and mounting characteristics, enabling direct PCB-level substitution without layout modification.

Frequently Asked Questions (FAQ)

Q: Can SMBJ28A-E3/5B be directly replaced with any of the listed substitutes?

A: Yes, all listed parts are electrically and mechanically equivalent within the specified parameter ranges. Direct PCB substitution is possible without circuit redesign, provided the substitute part's electrical characteristics fall within the application's tolerance window.

Q: What is the significance of the voltage clamping specification in selecting a substitute?

A: Voltage clamping (Max) @ Ipp determines the maximum voltage the TVS diode will clamp transient events to. The SMBJ28A-E3/5B specifies 45.5V maximum. Substitutes with lower clamping voltages (such as SMBJ28D-M3/I at 44.7V) provide tighter voltage regulation but must be verified against circuit protection requirements. Substitutes at or below 45.5V are acceptable.

Q: Are there temperature range differences among substitutes?

A: Yes. The primary part operates -55 to 150°C. SMBJ28A-TP extends to 175°C, and SZ1SMB28AT3G extends to -65°C. Selection depends on application thermal requirements. For standard industrial applications, all parts are functionally equivalent.

Q: Does packaging differ among substitutes?

A: No. All substitutes use DO-214AA (SMB) surface mount package with identical footprint and pinout. Tape & Reel (TR) and Cut Tape (CT) designations refer only to supply format and do not affect component functionality or PCB compatibility.

Q: What does RoHS3 compliance mean for substitution?

A: RoHS3 compliance certifies that all parts meet Restriction of Hazardous Substances regulations. All listed substitutes carry RoHS3 certification, ensuring regulatory equivalence for applications requiring environmental compliance.

Q: Is the SMBJ28A-TP suitable for high-temperature applications?

A: SMBJ28A-TP operates to 175°C junction temperature, exceeding the primary part's 150°C limit. This makes it suitable for applications with elevated thermal environments, provided other electrical parameters remain within circuit requirements.

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

A: Tape & Reel (TR) and Cut Tape (CT) refer to supply and handling formats for automated assembly. Both formats contain identical components. Selection is based on manufacturing process requirements, not electrical performance.