SMAJ17A-13 Equivalent & Substitute Parts

Part Overview

The SMAJ17A-13 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated in DO-214AC (SMA) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a reverse standoff voltage of 17V and clamping voltage of 27.6V at peak pulse current. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines.

Substiute Parts

SMAJ17A-13

Diodes IncorporatedIn Stock: 1208SMAJ17A-13 Datasheet

Current PartRFQ

SMAJ17A-13-F

Diodes IncorporatedIn Stock: 3082SMAJ17A-13-F Datasheet

DirectRFQ

SMAJ17A

MeritekIn Stock: 2780SMAJ17A Datasheet

DirectRFQ

SMAJ17A

MeritekIn Stock: 2780SMAJ17A Datasheet

DirectRFQ

PTVS17VS1UR,115

Nexperia USA Inc.In Stock: 18841PTVS17VS1UR,115 Datasheet

MFR RecommendedRFQ

SMAJ17A-TP

Micro Commercial CoIn Stock: 5986SMAJ17A-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMAJ17A-13 is determined by strict equivalence across the following electrical and mechanical parameters:

• Voltage - Reverse Standoff: 17V (nominal)
• Voltage - Breakdown: 18.9V (minimum)
• Voltage - Clamping: 27.6V (maximum at Ipp)
• Current - Peak Pulse: 14.5A nominal (14.49A acceptable within tolerance)
• Power - Peak Pulse: 400W
• Type: Zener, unidirectional
• Package / Case: DO-214AC (SMA) or equivalent surface mount package
• Operating Temperature: -55°C minimum to 150°C minimum

Substitute parts are grouped into two categories: direct electrical equivalents in the same package, and functionally equivalent parts in alternative surface mount packages that maintain all critical electrical parameters.

Parameter Comparison

Engineering Selection Recommendations

Direct Package Equivalent (DO-214AC / SMA):

SMAJ17A-13-F (Diodes Incorporated) is the primary substitute. This part maintains identical electrical specifications and package form factor as the original SMAJ17A-13. The -F suffix indicates Tape & Reel packaging and ROHS3 compliance. This is the recommended direct replacement for applications requiring the same footprint and handling characteristics.

SMAJ17A (Meritek) provides equivalent electrical performance with peak pulse current of 14.49A, within acceptable tolerance of the 14.5A specification. This part is active and ROHS3 compliant, suitable for direct PCB substitution in DO-214AC footprints.

SMAJ17A-TP (Micro Commercial Co) offers identical electrical parameters with extended operating temperature range to 175°C and ROHS3 compliance. This part is suitable for applications requiring higher temperature performance while maintaining the same package footprint.

Alternative Package Equivalent (SOD-123W):

PTVS17VS1UR,115 (Nexperia USA Inc.) maintains all critical electrical parameters with AEC-Q101 automotive qualification. The SOD-123W package is a smaller surface mount alternative to DO-214AC. This substitution requires PCB layout modification to accommodate the different package footprint but provides equivalent electrical performance and active product status.

All substitute parts maintain the required electrical specifications: 17V reverse standoff, 18.9V minimum breakdown, 27.6V maximum clamping voltage, 14.5A peak pulse current, and 400W peak pulse power. All active substitutes are ROHS3 compliant.

Frequently Asked Questions (FAQ)

Q: Can SMAJ17A-13-F be used as a direct replacement for SMAJ17A-13?

A: Yes. SMAJ17A-13-F is electrically and mechanically identical to SMAJ17A-13, with the same DO-214AC (SMA) package, identical voltage and current ratings, and equivalent operating temperature range. The primary difference is product status (active vs. discontinued) and RoHS compliance (ROHS3 vs. non-compliant).

Q: What is the difference between SMAJ17A from Meritek and SMAJ17A-13-F from Diodes Incorporated?

A: Both parts are electrically equivalent with identical reverse standoff voltage (17V), breakdown voltage (18.9V), and clamping voltage (27.6V). Peak pulse current differs slightly: Meritek specifies 14.49A versus Diodes' 14.5A, a difference within normal manufacturing tolerance. Both use DO-214AC (SMA) packaging and are ROHS3 compliant.

Q: Can PTVS17VS1UR,115 replace SMAJ17A-13 in existing designs?

A: PTVS17VS1UR,115 is electrically equivalent but uses SOD-123W package instead of DO-214AC (SMA). Direct PCB substitution is not possible without layout modification. The SOD-123W package has different land pattern dimensions and pin spacing. This part is suitable only for new designs or boards redesigned to accommodate SOD-123W footprint.

Q: Why does SMAJ17A-TP have a higher operating temperature range?

A: SMAJ17A-TP specifies -55°C ~ 175°C operating range compared to -55°C ~ 150°C for SMAJ17A-13. This extended upper temperature limit is a manufacturer specification difference and does not affect electrical performance at standard operating conditions. Both parts are suitable for general-purpose applications within their respective temperature ranges.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts (SMAJ17A-13-F, SMAJ17A, SMAJ17A-TP, and PTVS17VS1UR,115) are ROHS3 compliant. The original SMAJ17A-13 is RoHS non-compliant. For applications requiring RoHS compliance, any of the active substitutes are acceptable.

Q: What is the significance of the -TP and -F suffixes?

A: The -F suffix on SMAJ17A-13-F indicates Tape & Reel (TR) packaging format. The -TP suffix on SMAJ17A-TP also indicates Tape & Reel packaging. These suffixes denote packaging and handling format rather than electrical differences. Both formats are suitable for automated assembly processes.