SMAJ9.0 Equivalent & Substitute Parts

Part Overview

The SMAJ9.0 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. Specified with a 9V reverse standoff voltage, 16.17V maximum clamping voltage, and 26A peak pulse current in a DO-214AC (SMA) package, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary to maintain design continuity and ensure ongoing component availability for new production and field replacements.

Substiute Parts

SMAJ9.0

Littelfuse Inc.In Stock: 84436SMAJ9.0 Datasheet

Current PartRFQ

SMAJ9.0A

MDDIn Stock: 6651SMAJ9.0A Datasheet

DirectRFQ

SMAJ9.0A

MDDIn Stock: 6651SMAJ9.0A Datasheet

DirectRFQ

SMAJ9.0A-13-F

Diodes IncorporatedIn Stock: 30393SMAJ9.0A-13-F Datasheet

MFR RecommendedRFQ

SMAJ9.0A-TP

Micro Commercial CoIn Stock: 5920SMAJ9.0A-TP Datasheet

MFR RecommendedRFQ

SMAJ9.0AE3/TR13

Microchip TechnologyIn Stock: 823SMAJ9.0AE3/TR13 Datasheet

MFR RecommendedRFQ

SMAJ9.0E3/TR13

Microchip TechnologyIn Stock: 1026SMAJ9.0E3/TR13 Datasheet

MFR RecommendedRFQ

TV04A9V0J-G

Comchip TechnologyIn Stock: 906TV04A9V0J-G Datasheet

MFR RecommendedRFQ

TV04A9V0J-HF

Comchip TechnologyIn Stock: 1116TV04A9V0J-HF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMAJ9.0 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 9V
• Unidirectional Channels: 1
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Type: Zener
• RoHS Status: ROHS3 Compliant

All identified substitute parts maintain the 9V reverse standoff voltage, single unidirectional channel configuration, and DO-214AC (SMA) surface-mount package. Substitute parts are grouped into two categories based on clamping voltage and peak pulse current characteristics:

Group A (15.4V Clamping): SMAJ9.0A (MDD), SMAJ9.0A-13-F (Diodes Incorporated), SMAJ9.0A-TP (Micro Commercial Co), TV04A9V0J-G (Comchip Technology), TV04A9V0J-HF (Comchip Technology)

Group B (16.9V Clamping): SMAJ9.0E3/TR13 (Microchip Technology)

Group C (15.4V Clamping, Enhanced Current): SMAJ9.0AE3/TR13 (Microchip Technology)

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain ROHS3 compliance and are classified as active products, ensuring long-term availability and manufacturing support. Selection among substitute parts should be based on the following criteria:

For direct electrical equivalence with minimal clamping voltage variation: SMAJ9.0E3/TR13 (Microchip Technology) provides the closest clamping voltage match at 16.9V, compared to the original 16.17V specification, with enhanced peak pulse current (29.5A) and power dissipation (500W).

For standard performance with broad manufacturer availability: SMAJ9.0A-13-F (Diodes Incorporated) or SMAJ9.0A-TP (Micro Commercial Co) are suitable alternatives with 15.4V clamping voltage, matching the original 26A peak pulse current and 400W power rating. SMAJ9.0A-TP extends the upper operating temperature to 175°C (TA).

For enhanced transient protection capability: SMAJ9.0AE3/TR13 (Microchip Technology) offers increased peak pulse current (32.6A) and power dissipation (500W) while maintaining the 15.4V clamping voltage, providing additional margin for transient suppression.

For alternative sourcing: TV04A9V0J-G and TV04A9V0J-HF (Comchip Technology) provide equivalent electrical performance with 15.4V clamping voltage and 25.97A peak pulse current, suitable for applications requiring multi-source qualification.

Frequently Asked Questions (FAQ)

Q: Can SMAJ9.0A be used as a direct replacement for SMAJ9.0?

A: Yes. SMAJ9.0A maintains the critical electrical parameters: 9V reverse standoff voltage, 26A peak pulse current, 400W power dissipation, and DO-214AC (SMA) package. The clamping voltage is 15.4V compared to the original 16.17V, representing a 4.8% reduction within acceptable design margins for general-purpose overvoltage protection.

Q: What is the difference between SMAJ9.0AE3/TR13 and SMAJ9.0E3/TR13?

A: Both parts are manufactured by Microchip Technology and share the same 9V reverse standoff voltage and DO-214AC (SMA) package. SMAJ9.0AE3/TR13 specifies 15.4V clamping voltage with 32.6A peak pulse current and 500W power dissipation. SMAJ9.0E3/TR13 specifies 16.9V clamping voltage with 29.5A peak pulse current and 500W power dissipation. Selection depends on whether lower clamping voltage with higher current capability or higher clamping voltage with moderate current is required.

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

A: Yes. All substitute parts listed are supplied in tape and reel (TR) packaging, suitable for automated assembly processes.

Q: What is the operating temperature range difference between substitute parts?

A: Operating temperature ranges vary by manufacturer. SMAJ9.0A-TP (Micro Commercial Co) extends to 175°C (TA), while most alternatives specify -55°C to -65°C minimum with 150°C maximum. The original SMAJ9.0 specifies -65°C to 150°C (TJ). Selection should account for application thermal requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, meeting environmental and regulatory requirements equivalent to the original SMAJ9.0.

Q: Can TV04A9V0J-G and TV04A9V0J-HF be used interchangeably?

A: Yes. Both parts are manufactured by Comchip Technology with identical electrical specifications: 9V reverse standoff voltage, 15.4V clamping voltage, 25.97A peak pulse current, and DO-214AC (SMA) package. The suffix designations (-G and -HF) indicate different packaging or tape specifications but do not affect electrical performance.