DF3A6.8FUT1 Equivalent & Substitute Parts

Part Overview

The DF3A6.8FUT1 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 5V reverse standoff voltage with 16V maximum clamping voltage and 9.37A peak pulse current capability in an SC-70 (SOT-323) package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement.

Substiute Parts

DF3A6.8FUT1

onsemiIn Stock: 1046DF3A6.8FUT1 Datasheet

Current PartRFQ

DF3A6.8FUT1G

onsemiIn Stock: 65440DF3A6.8FUT1G Datasheet

DirectRFQ

PESD5V0L2UU,115

Nexperia USA Inc.In Stock: 975387PESD5V0L2UU,115 Datasheet

SimilarRFQ

SP0502BAJTG

Littelfuse Inc.In Stock: 18597SP0502BAJTG Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DF3A6.8FUT1 is determined by the following critical parameters:

Primary Matching Criteria:

• Reverse standoff voltage: 5V nominal
• Package type: SC-70 / SOT-323 surface mount
• Unidirectional configuration with 2 channels
• Zener diode type
• Operating temperature range: minimum -55°C to 150°C

Secondary Compatibility Parameters:

• Voltage clamping performance (16V maximum @ Ipp)
• Peak pulse current handling (9.37A @ 8/20µs)
• Power dissipation capability (150W peak pulse)

Substitute parts are classified into two categories: direct equivalents that maintain all electrical specifications, and functional alternatives that operate within acceptable parameter ranges for the intended application while meeting the core voltage and package requirements.

Parameter Comparison

Engineering Selection Recommendations

DF3A6.8FUT1G (Direct Equivalent - Recommended Primary Substitute)

The DF3A6.8FUT1G is the preferred replacement for the obsolete DF3A6.8FUT1. This part maintains identical electrical specifications including 5V reverse standoff voltage, 16V clamping voltage, and 9.37A peak pulse current. Both parts share the same base product number (DF3A6.8) and SC-70 package. The DF3A6.8FUT1G is currently in active production status with 65,400 units in stock. This part carries AEC-Q101 automotive qualification and ROHS3 compliance, providing superior regulatory standing compared to the obsolete original part.

PESD5V0L2UU,115 (Functional Alternative)

The PESD5V0L2UU,115 from Nexperia USA Inc. operates within the 5V reverse standoff voltage class and maintains SC-70 package compatibility. This part is actively produced with extensive inventory availability (975,337 units). However, electrical performance differs: clamping voltage is reduced to 13V maximum and peak pulse current is limited to 6.5A with 70W power dissipation. This part is suitable for applications where lower clamping voltage and reduced current handling are acceptable. AEC-Q101 qualification and ROHS3 compliance are provided.

SP0502BAJTG (Limited Compatibility)

The SP0502BAJTG from Littelfuse Inc. features a 5.5V reverse standoff voltage and 8.5V clamping voltage in SC-70 package format. This part exhibits significantly reduced electrical performance with lower clamping voltage and undocumented peak pulse current specifications. Operating temperature range is restricted to -40°C to 85°C, which does not meet the full -55°C to 150°C requirement of the original part. This option is suitable only for applications with relaxed voltage and temperature requirements.

Frequently Asked Questions (FAQ)

Q: Can DF3A6.8FUT1G be used as a direct replacement for DF3A6.8FUT1?

A: Yes. The DF3A6.8FUT1G maintains identical electrical specifications including 5V reverse standoff voltage, 16V clamping voltage, 9.37A peak pulse current, and SC-70 package configuration. The primary difference is product status (active vs. obsolete) and regulatory compliance (ROHS3 vs. non-compliant).

Q: What are the key differences between DF3A6.8FUT1G and PESD5V0L2UU,115?

A: Both parts operate at 5V reverse standoff voltage in SC-70 packages. The DF3A6.8FUT1G provides 16V clamping voltage and 9.37A peak pulse current, while the PESD5V0L2UU,115 is limited to 13V clamping and 6.5A peak pulse current. Selection depends on whether the application requires the higher performance specifications of the DF3A6.8FUT1G.

Q: Is SP0502BAJTG suitable for all applications using DF3A6.8FUT1?

A: No. The SP0502BAJTG has a higher reverse standoff voltage (5.5V) and significantly lower clamping voltage (8.5V). Additionally, its operating temperature range (-40°C to 85°C) does not cover the full -55°C to 150°C specification of the original part. Use this part only when application requirements permit reduced electrical performance and narrower temperature operation.

Q: Are all substitute parts available in the same packaging formats?

A: The DF3A6.8FUT1G is supplied in Tape & Reel (TR) format. The PESD5V0L2UU,115 and SP0502BAJTG are available in Cut Tape (CT) and Digi-Reel® formats. Verify packaging compatibility with your procurement and assembly processes.

Q: Do all substitute parts meet current regulatory requirements?

A: The DF3A6.8FUT1G, PESD5V0L2UU,115, and SP0502BAJTG all carry ROHS3 compliance and REACH unaffected status. The original DF3A6.8FUT1 is RoHS non-compliant. For new designs or applications requiring regulatory compliance, use only the active substitute parts.