SP3012-06UTG Equivalent & Substitute Parts

Part Overview

The SP3012-06UTG is a 6-channel steering TVS diode manufactured by Littelfuse Inc., designed for transient voltage suppression in surface mount applications. This part operates with a 5V reverse standoff voltage and 7V typical clamping voltage, rated for 4A peak pulse current. The SP3012-06UTG is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility across key electrical parameters including voltage ratings, current handling, and thermal operating range while accommodating package differences.

Substiute Parts

SP3012-06UTG

Littelfuse Inc.In Stock: 27046SP3012-06UTG Datasheet

Current PartRFQ

AQ7538-08UTG

Littelfuse Inc.In Stock: 4124AQ7538-08UTG Datasheet

MFR RecommendedRFQ

SC7538-08UTG

Littelfuse Inc.In Stock: 9453SC7538-08UTG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SP3012-06UTG are identified based on the following critical parameters that define functional equivalence:

Voltage Compatibility: Reverse standoff voltage of 5V (Max) and clamping voltage in the range of 7V-10.9V (Typ) are acceptable for steering TVS applications where the main part operates.

Current Rating: Peak pulse current of 3A-4A (8/20µs) maintains adequate transient suppression capability.

Channel Configuration: Steering (Rail to Rail) type with multiple unidirectional channels for multi-line protection.

Compliance & Grade: Automotive grade with AEC-Q101 qualification ensures reliability in automotive and industrial applications.

Thermal Range: Operating temperature of -40°C to 125°C or higher supports the original application environment.

Package Considerations: Surface mount packages (14-UDFN and 9-UDFN) are both acceptable for PCB integration, though physical dimensions differ.

The substitute parts AQ7538-08UTG and SC7538-08UTG meet these criteria despite differences in channel count (8 vs. 6), clamping voltage (10.9V vs. 7V), and package size (9-UDFN vs. 14-UDFN).

Parameter Comparison

Engineering Selection Recommendations

AQ7538-08UTG is the primary substitute for SP3012-06UTG. Both parts maintain Littelfuse manufacturing, automotive grade classification, and AEC-Q101 qualification. The AQ7538-08UTG is active in production, ensuring long-term availability. The higher clamping voltage (10.9V vs. 7V) and increased channel count (8 vs. 6) provide enhanced protection margins. The extended operating temperature range (-40°C to 150°C) exceeds the original specification. The 9-UDFN package requires PCB layout modification due to different footprint dimensions compared to the 14-UDFN original package.

SC7538-08UTG serves as a secondary substitute with identical electrical characteristics to AQ7538-08UTG. However, SC7538-08UTG lacks documented automotive grade and AEC-Q101 qualification, and does not provide power line protection. Selection of SC7538-08UTG is appropriate only for non-automotive applications or where power line protection is not required. The operating temperature range matches the original part (-40°C to 125°C).

Both substitutes are active products with confirmed inventory availability, supporting production continuity for obsolete SP3012-06UTG designs.

Frequently Asked Questions (FAQ)

Q: Can AQ7538-08UTG directly replace SP3012-06UTG without circuit modification?

A: Electrical substitution is valid based on voltage and current ratings. However, the package change from 14-UDFN to 9-UDFN requires PCB footprint redesign. The higher clamping voltage (10.9V vs. 7V) and additional channels (8 vs. 6) are compatible with the original application but may alter transient response characteristics.

Q: What is the difference between AQ7538-08UTG and SC7538-08UTG?

A: Both parts share identical electrical specifications and package dimensions. AQ7538-08UTG includes automotive grade classification and AEC-Q101 qualification with power line protection capability. SC7538-08UTG lacks these certifications and does not provide power line protection. For automotive applications, AQ7538-08UTG is the appropriate choice.

Q: Why does the substitute have 8 channels instead of 6?

A: The substitute parts are designed for multi-line protection in HDMI and USB applications, requiring additional channels. The extra channels do not negatively impact the original 6-channel application; unused channels remain inactive.

Q: Are there thermal considerations when switching from 14-UDFN to 9-UDFN?

A: Both packages are surface mount UDFN variants with similar thermal characteristics. The 9-UDFN package (3.8x1mm) is slightly larger in one dimension than the 14-UDFN (4.6x1.35mm), but thermal performance is comparable for typical PCB layouts.

Q: Is the lower peak pulse current (3A vs. 4A) a limitation?

A: The 3A rating of substitute parts is lower than the original 4A specification. For applications requiring the full 4A transient suppression capability, circuit analysis is necessary to confirm adequacy of the 3A rating.

Q: What is the impact of higher clamping voltage on circuit protection?

A: The substitute parts clamp at 10.9V (Typ) compared to 7V (Typ) for the original part. This higher clamping voltage provides less aggressive transient suppression but remains within acceptable limits for 5V logic protection. Circuit validation is recommended for noise-sensitive applications.