SMBJ9.0 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SMBJ9.0 is a unidirectional Zener-type transient voltage suppressor diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. The component features a 9V reverse standoff voltage with a 16.17V maximum clamping voltage at peak pulse current, housed in a DO-214AA (SMB) package. The SMBJ9.0 is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.

Substiute Parts

SMBJ9.0

Littelfuse Inc.In Stock: 839SMBJ9.0 Datasheet

Current PartRFQ

SMBJ9.0A

Taiwan Semiconductor CorporationIn Stock: 3195SMBJ9.0A Datasheet

MFR RecommendedRFQ

SMBJ9.0A

Taiwan Semiconductor CorporationIn Stock: 3195SMBJ9.0A Datasheet

MFR RecommendedRFQ

SMBJ9.0A-13-F

Diodes IncorporatedIn Stock: 12221SMBJ9.0A-13-F Datasheet

MFR RecommendedRFQ

SMBJ9.0E3/TR13

Microchip TechnologyIn Stock: 841SMBJ9.0E3/TR13 Datasheet

MFR RecommendedRFQ

SMBJ9V0A

Taiwan Semiconductor CorporationIn Stock: 7015SMBJ9V0A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ9.0 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): Must be 9V
• Voltage - Breakdown (Min): Must be within 9.5V to 10V range
• Voltage - Clamping (Max) @ Ipp: Must be 15.4V to 16.9V
• Current - Peak Pulse (10/1000µs): Must be 35.5A to 40A
• Power - Peak Pulse: Must be 600W
• Package / Case: Must be DO-214AA or SMB equivalent
• Mounting Type: Must be Surface Mount
• RoHS Status: Must be ROHS3 Compliant

All identified substitute parts maintain these electrical specifications within acceptable tolerances and share identical mechanical packaging, enabling direct replacement in circuit designs.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are active production components with ROHS3 compliance, ensuring regulatory alignment and supply chain continuity. The SMBJ9.0A and SMBJ9V0A from Taiwan Semiconductor Corporation offer the highest inventory availability (3100 and 6986 units respectively) and are recommended as primary alternatives. The SMBJ9.0A-13-F from Diodes Incorporated provides equivalent electrical performance with tape and reel packaging suitable for automated assembly. The SMBJ9.0E3/TR13 from Microchip Technology maintains the original -65°C lower operating temperature limit and is suitable for extended temperature range applications.

Frequently Asked Questions (FAQ)

Q: Can SMBJ9.0A directly replace SMBJ9.0 in existing designs?

A: Yes. Both parts share identical reverse standoff voltage (9V), equivalent breakdown voltage (10V vs. 9.5V), comparable clamping voltage (15.4V vs. 16.17V), and matching peak pulse current (40A vs. 39A). The DO-214AA (SMB) package is mechanically identical, enabling direct PCB substitution.

Q: What is the difference between SMBJ9.0A and SMBJ9V0A?

A: Both are manufactured by Taiwan Semiconductor Corporation with identical electrical specifications (9V standoff, 10V breakdown, 15.4V clamping, 39A peak pulse). SMBJ9V0A uses alternative part numbering nomenclature but provides equivalent performance and higher inventory availability.

Q: Does the operating temperature range affect substitution?

A: The SMBJ9.0 operates from -65°C to 150°C. Substitute parts SMBJ9.0A, SMBJ9.0A-13-F, and SMBJ9V0A operate from -55°C to 150°C. For applications requiring -65°C operation, SMBJ9.0E3/TR13 from Microchip Technology maintains the full temperature range.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts carry ROHS3 compliance certification, meeting environmental and regulatory requirements equivalent to the original SMBJ9.0.

Q: What packaging options are available?

A: SMBJ9.0A and SMBJ9V0A are available in standard packaging. SMBJ9.0A-13-F and SMBJ9.0E3/TR13 are supplied in tape and reel (TR) format, optimized for high-volume automated assembly processes.