SMA6L54A Equivalent & Substitute Parts

Part Overview

The SMA6L54A is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This surface-mount component operates across a wide temperature range and is RoHS3 compliant. The part is currently in active production status with 978 units available in inventory. Alternative equivalent parts may be required due to supply constraints, design revisions, or specific application requirements such as automotive qualification.

Substiute Parts

SMA6L54A

Littelfuse Inc.In Stock: 1010SMA6L54A Datasheet

Current PartRFQ

TPSMA6L54A

Littelfuse Inc.In Stock: 7069TPSMA6L54A Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMA6L54A is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff (Typ): 54V
• Voltage - Breakdown (Min): 60V
• Voltage - Clamping (Max) @ Ipp: 87.1V
• Current - Peak Pulse (10/1000µs): 6.9A
• Power - Peak Pulse: 600W
• Package / Case: DO-221AC, SMA Flat Leads
• Unidirectional Channels: 1
• Type: Zener

The TPSMA6L54A meets all electrical and mechanical requirements for direct substitution. Both parts share identical voltage ratings, peak pulse current specifications, power dissipation capability, and physical packaging. The substitute part is manufactured by the same supplier (Littelfuse Inc.) and maintains the same series lineage within the SMA6L product family.

Parameter Comparison

Engineering Selection Recommendations

Both the SMA6L54A and TPSMA6L54A are active production parts from Littelfuse Inc. with full RoHS3 compliance and unlimited moisture sensitivity rating. The primary distinction is that the TPSMA6L54A carries AEC-Q101 automotive qualification and operates across a narrower temperature range (-50°C to 150°C versus -65°C to 150°C). Selection between these parts depends on application requirements: the SMA6L54A is suitable for general-purpose industrial applications requiring extended low-temperature operation, while the TPSMA6L54A is specified for automotive and mission-critical applications requiring formal qualification documentation. Both parts are electrically and mechanically interchangeable for the specified voltage and current parameters.

Frequently Asked Questions (FAQ)

Q: Can the TPSMA6L54A replace the SMA6L54A in all applications?

A: The TPSMA6L54A is electrically and mechanically equivalent for all specified parameters. However, the operating temperature range differs: the TPSMA6L54A operates from -50°C to 150°C, while the SMA6L54A operates from -65°C to 150°C. Substitution is valid only if the application does not require operation below -50°C.

Q: What is the significance of AEC-Q101 qualification on the TPSMA6L54A?

A: AEC-Q101 is an automotive industry qualification standard. The TPSMA6L54A meets this specification, making it suitable for automotive and safety-critical applications. The standard SMA6L54A does not carry this qualification.

Q: Are the physical packages identical?

A: Yes. Both parts use the DO-221AC package with SMA flat leads and are surface-mount components. They are mechanically interchangeable on PCBs designed for either part number.

Q: What are the critical electrical parameters for substitution?

A: Substitution is valid when the following parameters match: Voltage - Reverse Standoff (54V), Voltage - Breakdown (60V minimum), Voltage - Clamping (87.1V maximum), Current - Peak Pulse (6.9A), and Power - Peak Pulse (600W).

Q: Do both parts have the same moisture sensitivity rating?

A: Yes. Both the SMA6L54A and TPSMA6L54A have MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.