SMB8J28CA-M3/52 Equivalent & Substitute Parts

Part Overview

The SMB8J28CA-M3/52 is a bidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AA (SMB) package and is designed for general-purpose transient voltage suppression applications. The part is currently active in production with RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative manufacturers offer improved lead times, or when design flexibility permits selection from multiple qualified sources meeting identical electrical and mechanical specifications.

Substiute Parts

SMB8J28CA-M3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 802SMB8J28CA-M3/52 Datasheet

Current PartRFQ

SMBJ28CA

MDDIn Stock: 26413SMBJ28CA Datasheet

MFR RecommendedRFQ

SMBJ28CA-13-F

Diodes IncorporatedIn Stock: 20264SMBJ28CA-13-F Datasheet

MFR RecommendedRFQ

SMBJ28CA-TP

Micro Commercial CoIn Stock: 2071SMBJ28CA-TP Datasheet

MFR RecommendedRFQ

SMBJ28CA-TR

STMicroelectronicsIn Stock: 27989SMBJ28CA-TR Datasheet

MFR RecommendedRFQ

SZ1SMB28CAT3G

Littelfuse Inc.In Stock: 55288SZ1SMB28CAT3G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of TVS diodes is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 28V
• Voltage - Breakdown (Min): 31.1V
• Voltage - Clamping (Max) @ Ipp: 45.4V
• Package / Case: DO-214AA, SMB (surface mount)
• Bidirectional Channels: 1
• RoHS3 Compliance and MSL 1 rating

The identified substitute parts maintain these core electrical specifications. Variations in peak pulse current (13.2A to 13.8A versus the main part's 17.6A) and peak pulse power (600W versus 800W) represent derating within the same functional class and do not preclude substitution for applications within the substitute part's power envelope. Operating temperature ranges vary slightly among manufacturers but remain within acceptable industrial and commercial ranges.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active product status and full RoHS3 compliance with MSL 1 rating, confirming their suitability for direct replacement in applications designed for the SMB8J28CA-M3/52.

The primary distinction among substitutes is peak pulse current and power rating. The main part (SMB8J28CA-M3/52) is rated at 17.6A and 800W, while all substitute parts are rated at 13.2A to 13.8A and 600W. Selection should be based on application transient energy requirements. Applications requiring the full 800W peak pulse power must retain the original Vishay part or confirm that substitute parts' 600W rating is adequate for the specific transient profile.

Operating temperature ranges vary slightly: MDD's SMBJ28CA operates to 150°C (minimum -50°C), while Littelfuse's SZ1SMB28CAT3G extends to -65°C. Micro Commercial's SMBJ28CA-TP offers the highest upper temperature limit at 175°C. Selection should align with the application's thermal environment.

Littelfuse's SZ1SMB28CAT3G carries AEC-Q101 automotive qualification and includes capacitance specification (310pF @ 1MHz), making it suitable for automotive and high-reliability applications where such certifications are required.

Frequently Asked Questions (FAQ)

Q: Can SMBJ28CA-13-F substitute for SMB8J28CA-M3/52 in all applications?

A: SMBJ28CA-13-F is electrically equivalent for voltage parameters (28V standoff, 31.1V breakdown, 45.4V clamping). However, its peak pulse current is 13.2A and peak pulse power is 600W, compared to the original part's 17.6A and 800W. Substitution is valid only if the application's transient energy does not exceed 600W peak pulse power.

Q: What is the difference between the packaging designations TR, CT, and TP?

A: TR (Tape & Reel) and CT (Cut Tape) & Digi-Reel® refer to supply format and reel configuration for automated assembly. TP indicates Tape & Reel packaging. All parts use the same DO-214AA (SMB) component package. Packaging format does not affect electrical performance or mechanical compatibility.

Q: Is SZ1SMB28CAT3G suitable for automotive applications?

A: Yes. SZ1SMB28CAT3G carries AEC-Q101 automotive qualification, making it suitable for automotive-grade applications. The original SMB8J28CA-M3/52 does not carry automotive qualification.

Q: Do all substitute parts have the same operating temperature range?

A: No. Operating temperature ranges vary: -50°C to 150°C (MDD), -55°C to 150°C (Vishay, Diodes, STMicroelectronics), -55°C to 175°C (Micro Commercial), and -65°C to 150°C (Littelfuse). Selection should match the application's thermal requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts are RoHS3 compliant with MSL 1 (unlimited moisture sensitivity), matching the original part's compliance status.

Q: Can I use SMBJ28CA-TR as a direct replacement without design changes?

A: Yes, for applications within its 600W peak pulse power rating. SMBJ28CA-TR maintains identical voltage specifications (28V standoff, 31.1V breakdown, 45.4V clamping) and the same DO-214AA (SMB) surface mount package. Peak pulse current is 13.8A, slightly lower than the original 17.6A.