SMA6L64A Equivalent & Substitute Parts

Part Overview

The SMA6L64A is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a 64V reverse standoff voltage and provides 103V maximum clamping voltage at peak pulse current. The part is currently in active production status with RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Substiute Parts

SMA6L64A

Littelfuse Inc.In Stock: 961SMA6L64A Datasheet

Current PartRFQ

TPSMA6L64A

Littelfuse Inc.In Stock: 15955TPSMA6L64A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of TVS diodes is determined by matching the following critical electrical and mechanical parameters:

• Voltage - Reverse Standoff (Typ): 64V
• Voltage - Clamping (Max) @ Ipp: 103V
• Current - Peak Pulse (10/1000µs): 5.9A
• Power - Peak Pulse: 600W
• Package / Case: DO-221AC, SMA Flat Leads
• Mounting Type: Surface Mount
• Type: Zener
• Unidirectional Channels: 1

The TPSMA6L64A meets all these criteria and is therefore qualified as a direct substitute for the SMA6L64A. Both parts share identical electrical specifications and mechanical packaging, ensuring functional interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

Both the SMA6L64A and TPSMA6L64A are active production parts from Littelfuse Inc. with identical electrical and mechanical specifications. Selection between these parts should be based on application requirements and supply availability.

The TPSMA6L64A carries automotive-grade qualification (AEC-Q101) and is rated for automotive applications, making it suitable for designs requiring automotive-level reliability and traceability. The SMA6L64A provides a standard industrial-grade option with a wider operating temperature range (-65°C to 150°C versus -50°C to 150°C).

Both parts maintain full RoHS3 compliance, unlimited moisture sensitivity rating, and identical regulatory classifications (REACH Unaffected, ECCN EAR99). The choice between these substitutes depends on whether automotive qualification is a design requirement and the specific operating temperature range needed for the application.

Frequently Asked Questions (FAQ)

Q: Can TPSMA6L64A replace SMA6L64A in existing designs?

A: Yes. Both parts share identical electrical specifications (64V standoff, 103V clamping, 5.9A peak pulse current, 600W peak power) and mechanical packaging (DO-221AC, SMA flat leads, surface mount). They are functionally interchangeable.

Q: What is the difference between SMA6L64A and TPSMA6L64A?

A: The primary differences are operating temperature range and automotive qualification. The TPSMA6L64A is AEC-Q101 qualified for automotive applications with a -50°C to 150°C operating range, while the SMA6L64A operates from -65°C to 150°C without automotive certification.

Q: Are both parts RoHS compliant?

A: Yes. Both SMA6L64A and TPSMA6L64A are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Q: Do these parts require different PCB footprints?

A: No. Both parts use identical DO-221AC packaging with SMA flat leads, requiring the same PCB footprint and assembly process.

Q: Which part should I select for automotive applications?

A: The TPSMA6L64A is recommended for automotive applications due to its AEC-Q101 qualification and automotive-grade designation.

Q: Are there any temperature-related limitations when substituting?

A: The SMA6L64A supports a lower minimum operating temperature (-65°C versus -50°C). If your application requires operation below -50°C, the SMA6L64A is the appropriate choice.