SP1054-01UTG Equivalent & Substitute Parts

Part Overview

The SP1054-01UTG is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for surface mount applications in the 01005 package format. This component features a 6V reverse standoff voltage with a 13V maximum clamping voltage and 2A peak pulse current rating (8/20µs). The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility for new designs and production continuity.

Substiute Parts

SP1054-01UTG

Littelfuse Inc.In Stock: 21252SP1054-01UTG Datasheet

Current PartRFQ

SP1020-01WTG

Littelfuse Inc.In Stock: 17980SP1020-01WTG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SP1054-01UTG is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Reverse standoff voltage: 6V (Max)
• Peak pulse current rating: 2A (8/20µs)
• Operating temperature range: -40°C ~ 125°C minimum
• Package format: 01005 (0402 Metric) surface mount

Functional Equivalence Logic: The SP1020-01WTG qualifies as a substitute based on matching reverse standoff voltage (6V Max), identical peak pulse current (2A at 8/20µs), compatible operating temperature range (-40°C ~ 125°C), and identical package specification (01005/0402 Metric). The clamping voltage differential (10V vs. 13V) represents a tighter clamp characteristic, which is acceptable for applications where the original 13V clamp was not a minimum requirement. The SP1020 series maintains automotive-grade qualification and ROHS3 compliance, ensuring regulatory continuity.

Parameter Comparison

Engineering Selection Recommendations

The SP1020-01WTG is the designated substitute for the obsolete SP1054-01UTG based on the following engineering criteria:

Product Status: The SP1020-01WTG maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete SP1054-01UTG.

Compliance & Certification: Both parts maintain ROHS3 compliance and identical MSL ratings (1/Unlimited). The SP1020 series retains automotive-grade qualification consistent with the original part's AEC-Q101 specification.

Electrical Performance: The substitute maintains identical reverse standoff voltage (6V Max) and peak pulse current (2A at 8/20µs), ensuring functional compatibility in transient suppression applications. The reduced clamping voltage (10V vs. 13V) provides enhanced protection margin in applications where lower clamp levels are acceptable.

Package Compatibility: Both parts utilize the 01005 (0402 Metric) surface mount package, enabling direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can the SP1020-01WTG directly replace the SP1054-01UTG without circuit modification?

A: Direct substitution is possible when the application circuit does not require the specific 13V clamping characteristic of the original part. The SP1020-01WTG's 10V clamp provides tighter transient suppression. Circuit validation is necessary to confirm the lower clamp voltage is compatible with the protected circuit's voltage tolerance specifications.

Q: What is the primary difference between these two parts?

A: The primary difference is the maximum clamping voltage: SP1054-01UTG clamps at 13V maximum, while SP1020-01WTG clamps at 10V maximum. Both parts share identical reverse standoff voltage (6V), peak pulse current (2A), operating temperature range, and package format.

Q: Are there packaging differences between the main part and substitute?

A: Both parts are specified in the 01005 (0402 Metric) surface mount package. The SP1054-01UTG is supplied in Cut Tape (CT) packaging, while the SP1020-01WTG is supplied in Tape & Reel (TR) packaging. This represents a packaging format difference only and does not affect component functionality or PCB assembly compatibility.

Q: Does the SP1020-01WTG meet automotive qualification requirements?

A: The SP1020-01WTG maintains automotive-grade classification and ROHS3 compliance consistent with the original SP1054-01UTG specification, ensuring regulatory and qualification continuity for automotive applications.

Q: What inventory status should be considered for production planning?

A: The SP1054-01UTG (obsolete) has 21,183 pcs in stock, while the SP1020-01WTG (active) has 17,880 pcs in stock. For new designs and long-term production, the active SP1020-01WTG is the recommended selection to ensure sustained component availability.