SMAJ17 Equivalent & Substitute Parts

Part Overview

The SMAJ17 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. The device features a 17V reverse standoff voltage with a 28.98V maximum clamping voltage and 14.5A peak pulse current capability in a DO-214AC (SMA) package.

The SMAJ17 is classified as obsolete. Equivalent and substitute parts are available from multiple manufacturers with active product status, offering comparable or enhanced electrical performance while maintaining compatibility with the original package and mounting requirements.

Substiute Parts

SMAJ17

Littelfuse Inc.In Stock: 84241SMAJ17 Datasheet

Current PartRFQ

SMAJ17A

MeritekIn Stock: 2780SMAJ17A Datasheet

DirectRFQ

SMAJ17A

MeritekIn Stock: 2780SMAJ17A Datasheet

DirectRFQ

SMAJ17A-13-F

Diodes IncorporatedIn Stock: 3082SMAJ17A-13-F Datasheet

MFR RecommendedRFQ

SMAJ17A-TP

Micro Commercial CoIn Stock: 5986SMAJ17A-TP Datasheet

MFR RecommendedRFQ

SMAJ17AE3/TR13

Microchip TechnologyIn Stock: 1049SMAJ17AE3/TR13 Datasheet

MFR RecommendedRFQ

SMAJ17E3/TR13

Microchip TechnologyIn Stock: 707SMAJ17E3/TR13 Datasheet

MFR RecommendedRFQ

TV04A170J-G

Comchip TechnologyIn Stock: 909TV04A170J-G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMAJ17 is determined by the following critical parameters:

• Reverse Standoff Voltage: 17V (all substitutes maintain this specification)
• Package / Case: DO-214AC (SMA) surface mount (all substitutes use identical package)
• Voltage - Clamping (Max) @ Ipp: Range 27.6V to 30.5V (acceptable variation within application tolerance)
• Current - Peak Pulse (10/1000µs): Range 14.49A to 18.1A (equal or greater capacity acceptable)
• Power - Peak Pulse: 400W to 500W (equal or greater capacity acceptable)
• RoHS Compliance: ROHS3 Compliant (all substitutes meet this requirement)

Substitute parts are grouped into two categories based on clamping voltage performance:

Group A (27.6V Clamping): SMAJ17A (Meritek), SMAJ17A-13-F (Diodes Incorporated), SMAJ17A-TP (Micro Commercial Co), TV04A170J-G (Comchip Technology)

Group B (30.5V Clamping): SMAJ17E3/TR13 (Microchip Technology)

All substitutes maintain the 17V reverse standoff voltage and DO-214AC package specification. Clamping voltage and peak pulse current variations remain within acceptable electrical performance boundaries for general-purpose transient suppression applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Group A - 27.6V Clamping)

SMAJ17A-13-F (Diodes Incorporated) and SMAJ17A-TP (Micro Commercial Co) are recommended as primary substitutes. Both parts maintain electrical equivalence to the original SMAJ17 specification with active product status and ROHS3 compliance. SMAJ17A-TP offers extended operating temperature range to 175°C, providing additional thermal margin for high-temperature applications.

Enhanced Performance Alternative (Group B - 30.5V Clamping)

SMAJ17AE3/TR13 (Microchip Technology) provides enhanced performance with 18.1A peak pulse current and 500W peak pulse power, exceeding the original specification. This part is suitable for applications requiring higher transient energy absorption while maintaining the 17V reverse standoff voltage and DO-214AC package compatibility.

Secondary Alternatives

SMAJ17A (Meritek) and TV04A170J-G (Comchip Technology) are functionally equivalent to Group A substitutes with active product status and full compliance certifications. Both are suitable for direct replacement in general-purpose applications.

All substitute parts are ROHS3 compliant and carry REACH Unaffected status, meeting regulatory requirements for electronic component procurement.

Frequently Asked Questions (FAQ)

Q: Can SMAJ17A-TP be used as a direct replacement for SMAJ17?

A: Yes. SMAJ17A-TP maintains the 17V reverse standoff voltage, 27.6V clamping voltage, and DO-214AC package specification. The extended operating temperature range (-55°C to 175°C) provides additional thermal capability compared to the original part.

Q: What is the difference between Group A (27.6V) and Group B (30.5V) substitutes?

A: Group A substitutes (27.6V clamping) provide electrical equivalence to the original SMAJ17 specification. Group B (SMAJ17E3/TR13 at 30.5V clamping) offers higher clamping voltage and increased peak pulse current (16.4A) and power (500W), suitable for applications requiring enhanced transient suppression capability.

Q: Are all substitute parts available in tape and reel packaging?

A: SMAJ17A-13-F, SMAJ17A-TP, SMAJ17AE3/TR13, SMAJ17E3/TR13, and TV04A170J-G are supplied in tape and reel (TR) packaging. SMAJ17A (Meritek) packaging specification is not provided in the technical data.

Q: What is the minimum operating temperature difference between substitutes?

A: SMAJ17A-TP supports operation down to -55°C, while SMAJ17AE3/TR13, SMAJ17E3/TR13, and the original SMAJ17 support -65°C. For applications requiring -65°C operation, select Microchip Technology parts or the original Littelfuse specification.

Q: Do all substitutes meet RoHS and REACH compliance?

A: All substitute parts are ROHS3 compliant. SMAJ17A, SMAJ17A-13-F, SMAJ17A-TP, SMAJ17AE3/TR13, SMAJ17E3/TR13, and TV04A170J-G carry REACH Unaffected status.

Q: Which substitute offers the highest peak pulse current capability?

A: SMAJ17AE3/TR13 (Microchip Technology) provides 18.1A peak pulse current with 500W peak pulse power, exceeding all other substitutes and the original SMAJ17 specification.