SMBJ26A-13 Transient Voltage Suppressor (TVS) Diode Equivalent & Substitute Parts

Part Overview

The SMBJ26A-13 is a unidirectional Zener transient voltage suppressor diode manufactured by Diodes Incorporated, designed for general-purpose overvoltage protection in surface-mount applications. The device features a 26V reverse standoff voltage with a 42.1V maximum clamping voltage and 14.2A peak pulse current capability in a DO-214AA (SMB) package. This part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for circuit protection applications.

Substiute Parts

SMBJ26A-13

Diodes IncorporatedIn Stock: 23124SMBJ26A-13 Datasheet

Current PartRFQ

SMBJ26A-13-F

Diodes IncorporatedIn Stock: 416273SMBJ26A-13-F Datasheet

DirectRFQ

SMBJ26A

EVVO SemiIn Stock: 39808SMBJ26A Datasheet

DirectRFQ

SMBJ26A

EVVO SemiIn Stock: 39808SMBJ26A Datasheet

DirectRFQ

SMBJ26A

EVVO SemiIn Stock: 39808SMBJ26A Datasheet

DirectRFQ

PTVS26VP1UP,115

Nexperia USA Inc.In Stock: 12390PTVS26VP1UP,115 Datasheet

MFR RecommendedRFQ

SACB26

LittelfuseIn Stock: 2455SACB26 Datasheet

MFR RecommendedRFQ

SMBJ26A-TR

STMicroelectronicsIn Stock: 7108SMBJ26A-TR Datasheet

MFR RecommendedRFQ

TV06B260JB-G

Comchip TechnologyIn Stock: 12706TV06B260JB-G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMBJ26A-13 is determined by strict equivalence across the following electrical and mechanical parameters:

• Voltage - Reverse Standoff: 26V (nominal)
• Voltage - Breakdown (Min): 28.9V
• Voltage - Clamping (Max) @ Ipp: 42.1V
• Current - Peak Pulse (10/1000µs): 14.2A minimum
• Power - Peak Pulse: 600W minimum
• Package / Case: DO-214AA (SMB) or mechanically compatible surface-mount packages
• Type: Zener, unidirectional configuration
• Mounting: Surface Mount

Substitute parts are grouped into two categories: direct electrical equivalents in SMB packaging (DO-214AA) and functionally equivalent alternatives in alternative surface-mount packages (SMA, SOD-128) that maintain the same voltage and current ratings within specified tolerances.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Identical Specification, Same Package): SMBJ26A-13-F (Diodes Incorporated) is the direct replacement for SMBJ26A-13. This part maintains identical electrical specifications and DO-214AA (SMB) packaging while offering active product status and ROHS3 compliance, addressing the discontinuation of the original part.

Secondary Substitutes (Equivalent Electrical Performance, Same Package): SMBJ26A-TR (STMicroelectronics) and TV06B260JB-G (Comchip Technology) provide equivalent voltage and power ratings in DO-214AA (SMB) packaging with peak pulse currents of 14.9A and 14.25A respectively, both exceeding the original 14.2A specification. Both parts are active and ROHS3 compliant.

Alternative Package Substitutes (Equivalent Electrical Performance, Different Package): SMBJ26A (EVVO Semi) in DO-214AC (SMA) package and PTVS26VP1UP,115 (Nexperia USA Inc.) in SOD-128 package maintain the 26V/42.1V voltage ratings and 600W power rating. The Nexperia part includes AEC-Q101 automotive qualification. These alternatives require PCB layout modification to accommodate different package footprints.

Conditional Substitute (Reduced Peak Pulse Current): SACB26 (Littelfuse) in DO-214AA (SMB) packaging maintains voltage specifications but specifies 11.1A peak pulse current and 500W power rating, below the original 14.2A/600W specification. This part is suitable only for applications where the reduced current and power ratings are acceptable.

Frequently Asked Questions (FAQ)

Q: Can SMBJ26A-13-F be used as a direct replacement for SMBJ26A-13? A: Yes. SMBJ26A-13-F is electrically and mechanically identical to SMBJ26A-13, with the same voltage ratings (26V standoff, 42.1V clamping), current rating (14.2A), power rating (600W), and DO-214AA (SMB) package. The primary difference is product status (active vs. discontinued) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between SMB and SMA packages? A: SMB (DO-214AA) and SMA (DO-214AC) are both surface-mount diode packages but differ in physical dimensions and PCB footprint. SMA packages are smaller than SMB packages. Substitution between these packages requires PCB layout modification and verification of thermal performance in the target application.

Q: Why does SACB26 have lower peak pulse current (11.1A) than the original part (14.2A)? A: SACB26 is rated for 11.1A peak pulse current and 500W power dissipation, which are lower than the SMBJ26A-13 specification of 14.2A and 600W. This part is suitable only for applications where the reduced transient current and power handling are acceptable for the circuit protection requirement.

Q: Is the Nexperia PTVS26VP1UP,115 suitable for automotive applications? A: Yes. PTVS26VP1UP,115 carries AEC-Q101 automotive qualification and is rated for -55°C to 150°C operating temperature. It maintains the 26V/42.1V voltage and 600W power specifications in a SOD-128 package, making it suitable for automotive transient voltage suppression applications.

Q: Can I use a bidirectional TVS diode as a substitute? A: No. The SMBJ26A-13 is a unidirectional Zener TVS diode. Bidirectional TVS diodes have different electrical characteristics and are designed for different circuit topologies. Substitution with a bidirectional device will not provide equivalent circuit protection.

Q: What does ROHS3 compliance mean? A: ROHS3 compliance indicates the part meets the Restriction of Hazardous Substances Directive 3 (2015/863/EU), which restricts the use of specific hazardous substances including lead, cadmium, mercury, and certain flame retardants. The original SMBJ26A-13 is RoHS non-compliant, while all listed substitutes are ROHS3 compliant.