SMAJ90A-TP Equivalent & Substitute Parts

Part Overview

The SMAJ90A-TP is a unidirectional transient voltage suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 90V reverse standoff voltage with a 146V maximum clamping voltage and 2.7A peak pulse current capability in a DO-214AC (SMA) package. The part is active in production status with full RoHS3 compliance and unlimited moisture sensitivity rating, making it suitable for integration into protective circuits requiring reliable transient suppression.

Equivalent and substitute parts are identified based on matching electrical performance parameters within the allowed tolerance ranges for TVS diode applications, ensuring functional interchangeability without circuit redesign.

Substiute Parts

SMAJ90A-TP

Micro Commercial CoIn Stock: 3843SMAJ90A-TP Datasheet

Current PartRFQ

SMAJ90A

HY Electronic (Cayman) LimitedIn Stock: 10366SMAJ90A Datasheet

DirectRFQ

SMAJ90A

HY Electronic (Cayman) LimitedIn Stock: 10366SMAJ90A Datasheet

DirectRFQ

SMAJ90A

HY Electronic (Cayman) LimitedIn Stock: 10366SMAJ90A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMAJ90A-TP are qualified based on the following electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 90V
• Voltage - Breakdown (Min): 100V
• Voltage - Clamping (Max) @ Ipp: 146V
• Current - Peak Pulse (10/1000µs): ≥2.7A
• Power - Peak Pulse: ≥400W
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• Type: Zener

The SMAJ90A from HY Electronic (Cayman) Limited meets all substitution criteria with matching voltage specifications, equivalent clamping characteristics, and compatible package configuration. The peak pulse current of 2.8A exceeds the minimum requirement, and the 400W peak pulse power rating matches the original specification. Both parts maintain identical mechanical compatibility and surface-mount integration requirements.

Parameter Comparison

Engineering Selection Recommendations

The SMAJ90A from HY Electronic (Cayman) Limited qualifies as a direct substitute for the SMAJ90A-TP. Both parts maintain active production status and full RoHS3 compliance. The substitute part demonstrates equivalent electrical performance across all critical parameters: matching reverse standoff voltage, breakdown voltage, and clamping voltage specifications. The peak pulse current of 2.8A provides additional margin above the 2.7A requirement, and the identical 400W peak pulse power rating ensures thermal performance compatibility.

Both parts share identical package configuration (DO-214AC, SMA), mounting type (surface mount), and moisture sensitivity classification (MSL 1, Unlimited), confirming mechanical and environmental interchangeability. The substitute part is suitable for direct replacement in existing circuit designs without modification to PCB layout or component footprints.

Frequently Asked Questions (FAQ)

Q: Can SMAJ90A from HY Electronic replace SMAJ90A-TP in production designs?

A: Yes. The SMAJ90A meets all electrical and mechanical substitution criteria, including matching voltage specifications (90V standoff, 100V breakdown, 146V clamping), compatible peak pulse current (2.8A vs. 2.7A), identical package configuration (DO-214AC, SMA), and equivalent RoHS3 compliance status.

Q: Are there differences in operating temperature ranges between the main part and substitute?

A: The SMAJ90A-TP operates from -55°C to 175°C (TA), while the SMAJ90A operates from -55°C to 150°C (TJ). Applications requiring operation above 150°C should retain the original SMAJ90A-TP specification.

Q: Do both parts use identical PCB footprints?

A: Yes. Both the SMAJ90A-TP and SMAJ90A use the DO-214AC (SMA) package with identical mechanical dimensions and pin configuration, requiring no PCB layout modifications for substitution.

Q: What is the significance of the higher peak pulse current in the substitute part?

A: The SMAJ90A's 2.8A peak pulse current exceeds the 2.7A specification of the SMAJ90A-TP, providing additional transient suppression capability and thermal margin without affecting circuit compatibility.

Q: Are compliance certifications equivalent between both parts?

A: Both parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. The SMAJ90A-TP carries REACH Unaffected status, while the SMAJ90A lists REACH status as Vendor Undefined. Verify REACH compliance requirements for your specific application jurisdiction.