SP4061-04UTG Equivalent & Substitute Parts

Part Overview

The SP4061-04UTG is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for rail-to-rail steering protection in general-purpose applications. This component features a 2.5V reverse standoff voltage with an 11.5V clamping voltage and 20A peak pulse current capability in a compact 10-UDFN surface mount package. The part is currently listed as obsolete, making identification of suitable substitutes essential for ongoing design support and production continuity.

Substiute Parts

SP4061-04UTG

Littelfuse Inc.In Stock: 30443SP4061-04UTG Datasheet

Current PartRFQ

SP2504NUTG

Littelfuse Inc.In Stock: 9971SP2504NUTG Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SP4061-04UTG is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 2.5V (Max)
• Voltage - Clamping: 11.5V @ Ipp
• Current - Peak Pulse: 20A (8/20µs)
• Power - Peak Pulse: 300W
• Type: Steering (Rail to Rail)
• Unidirectional Channels: 4
• Package / Case: 10-UDFN (2.6x2.6)
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The SP2504NUTG meets all these criteria and is classified as an active product, providing direct functional and mechanical compatibility with the obsolete SP4061-04UTG.

Parameter Comparison

Engineering Selection Recommendations

The SP2504NUTG is the direct substitute for the obsolete SP4061-04UTG. Both components are manufactured by Littelfuse Inc. and maintain identical electrical and mechanical specifications across all critical parameters. The SP2504NUTG carries active product status, ensuring ongoing availability and supply chain support. Both parts are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity ratings, meeting equivalent environmental and regulatory requirements. The SP2504NUTG is supplied in Tape & Reel packaging, which is standard for production environments. The extended operating temperature range of the SP2504NUTG (-40°C ~ 125°C TJ versus -40°C ~ 85°C TA for the main part) provides additional thermal margin without compromising functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SP2504NUTG be used as a direct replacement for the SP4061-04UTG?

A: Yes. Both components share identical electrical ratings (2.5V reverse standoff, 11.5V clamping voltage, 20A peak pulse current, 300W peak power), the same steering rail-to-rail topology with 4 unidirectional channels, and identical 10-UDFN (2.6x2.6) package geometry. No circuit modifications are required.

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

A: The SP4061-04UTG is obsolete, while the SP2504NUTG is an active product. The SP2504NUTG also features an extended operating temperature range (-40°C ~ 125°C TJ) compared to the main part (-40°C ~ 85°C TA). Both maintain equivalent RoHS3 compliance and MSL Level 1 ratings.

Q: Are there packaging differences between the two parts?

A: The SP4061-04UTG is supplied in standard packaging, while the SP2504NUTG is supplied in Tape & Reel (TR) format. Both use the identical 10-UDFN (2.6x2.6) physical package with exposed pad. Tape & Reel packaging is standard for automated assembly processes.

Q: Do both parts meet the same regulatory and environmental standards?

A: Yes. Both the SP4061-04UTG and SP2504NUTG are ROHS3 compliant, carry MSL Level 1 (Unlimited) moisture sensitivity ratings, and share the same ECCN (EAR99) and HTSUS (8541.10.0080) classifications.

Q: What applications are these TVS diodes suitable for?

A: Both components are rated for general-purpose transient voltage suppression with power line protection capability. The 4-channel steering configuration supports rail-to-rail protection in multi-signal environments.