SMAJ9.0A Equivalent & Substitute Parts

Part Overview

The SMAJ9.0A is an active-status transient voltage suppressor (TVS) diode manufactured by Taiwan Semiconductor Corporation. This unidirectional zener diode is designed for general-purpose transient voltage suppression in surface-mount applications. The device features a 9V reverse standoff voltage with a 15.4V maximum clamping voltage and 26A peak pulse current capability. The SMAJ9.0A is packaged in the DO-214AC (SMA) form factor and is RoHS3 compliant with unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the TVS diode category.

Substiute Parts

SMAJ9.0A

Taiwan Semiconductor CorporationIn Stock: 6696SMAJ9.0A Datasheet

Current PartRFQ

SMAJ9.0A

MDDIn Stock: 6651SMAJ9.0A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ9.0A are identified based on electrical parameter equivalence and mechanical compatibility. The critical parameters that determine substitution eligibility are:

• Voltage - Reverse Standoff (Typ): 9V
• Voltage - Clamping (Max) @ Ipp: 15.4V
• Current - Peak Pulse (10/1000µs): 26A
• Power - Peak Pulse: 400W
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• RoHS Compliance: ROHS3 Compliant

Parts meeting all these electrical and mechanical specifications are classified as direct substitutes. Operating temperature range variations within the specified limits do not preclude substitution eligibility when all other parameters align.

Parameter Comparison

Engineering Selection Recommendations

Both the SMAJ9.0A from Taiwan Semiconductor Corporation and the SMAJ9.0A from MDD are active-status products with identical electrical specifications and mechanical compatibility. Selection between these parts is based on the following factors:

Compliance and Certification: Both parts are ROHS3 compliant and carry EAR99 export classification. Both maintain unlimited moisture sensitivity rating (MSL 1), indicating no special storage or handling requirements.

Operating Temperature: The Taiwan Semiconductor version operates across -55°C to 150°C, while the MDD version operates across -50°C to 150°C. Applications requiring operation below -50°C require the Taiwan Semiconductor part.

Availability and Supply Chain: Both parts are listed as new original stock. Selection may be based on supplier availability, lead time, and procurement requirements.

Electrical Performance: Both parts deliver identical transient suppression performance with 9V standoff voltage, 15.4V clamping voltage, and 26A peak pulse current capability.

Frequently Asked Questions (FAQ)

Q: Can the MDD SMAJ9.0A substitute for the Taiwan Semiconductor SMAJ9.0A in all applications?

A: The MDD SMAJ9.0A is electrically and mechanically equivalent for applications operating within the -50°C to 150°C temperature range. Applications requiring operation below -50°C require the Taiwan Semiconductor version, which supports -55°C to 150°C.

Q: Are there package compatibility differences between these parts?

A: Both parts use identical DO-214AC (SMA) packaging and are supplied in Tape & Reel format. They are mechanically interchangeable on standard surface-mount assembly equipment.

Q: What are the critical electrical parameters for TVS diode substitution?

A: For the SMAJ9.0A category, critical parameters are reverse standoff voltage (9V), clamping voltage (15.4V), peak pulse current (26A), and peak pulse power (400W). Parts matching all four parameters are direct substitutes.

Q: Do both parts meet RoHS requirements?

A: Yes, both the Taiwan Semiconductor and MDD versions are ROHS3 compliant and suitable for applications with RoHS material restrictions.

Q: What is the significance of MSL 1 rating?

A: MSL 1 (Unlimited) indicates these parts have unlimited shelf life and require no special moisture control during storage or handling, simplifying inventory management and logistics.

Q: Are there differences in export classification between these parts?

A: Both parts carry identical EAR99 export classification and HTSUS code 8541.10.0080, indicating no differences in export or tariff treatment.