SMF05T1 Equivalent & Substitute Parts

Part Overview

The SMF05T1 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by onsemi, designed for general-purpose overvoltage protection in surface-mount applications. It features a 5V reverse standoff voltage with a 12.5V maximum clamping voltage and 12A peak pulse current capability in an SC-88A (SC-70-5/SOT-353) package. The SMF05T1 is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

SMF05T1

onsemiIn Stock: 1500SMF05T1 Datasheet

Current PartRFQ

SMF05T1G

onsemiIn Stock: 80291SMF05T1G Datasheet

DirectRFQ

PESD5V0L4UG,115

Nexperia USA Inc.In Stock: 21886PESD5V0L4UG,115 Datasheet

SimilarRFQ

SMF05.TCT

Semtech CorporationIn Stock: 86108SMF05.TCT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SMF05T1 is determined by the following critical parameters: reverse standoff voltage (5V), breakdown voltage minimum (6V), clamping voltage (12.5V maximum), peak pulse current (12A at 8/20µs), package type (5-TSSOP/SC-70-5/SOT-353), and unidirectional channel configuration (4 channels). Parts meeting these specifications are classified as direct equivalents. Parts with identical electrical performance but different packaging formats are classified as direct substitutes. Parts with the same reverse standoff and breakdown voltages but different clamping voltage or peak pulse current ratings are classified as similar substitutes, suitable only when application requirements permit the parameter variance.

Parameter Comparison

Engineering Selection Recommendations

SMF05T1G (onsemi) is the primary direct substitute for the obsolete SMF05T1. Both parts share identical electrical specifications (5V standoff, 6V breakdown minimum, 12.5V clamping, 12A peak pulse current, 200W peak power) and package configuration. SMF05T1G is currently in active production status with ROHS3 compliance, making it the preferred choice for new designs and production continuity.

SMF05.TCT (Semtech Corporation) is a direct electrical equivalent with identical voltage and current ratings. It maintains the same 12.5V clamping voltage and 12A peak pulse current. The primary difference is the maximum operating temperature of 125°C (versus 150°C for SMF05T1 and SMF05T1G), which may be a limiting factor in high-temperature applications. SMF05.TCT is ROHS3 compliant and actively produced.

PESD5V0L4UG,115 (Nexperia USA Inc.) is a similar substitute with the same 5V reverse standoff voltage and 6.46V breakdown minimum. However, it features a higher clamping voltage (13V) and significantly lower peak pulse current (2.5A) and power rating (30W). This part is suitable only for applications with lower transient current requirements. PESD5V0L4UG,115 includes AEC-Q100 automotive qualification and operates across an extended temperature range (-65°C to 150°C).

All substitute parts maintain the 5-TSSOP/SC-70-5/SOT-353 package footprint and 4-channel unidirectional configuration, ensuring mechanical and electrical compatibility at the board level.

Frequently Asked Questions (FAQ)

Q: Can SMF05T1G be used as a direct replacement for SMF05T1?

A: Yes. SMF05T1G is a direct substitute with identical electrical specifications and package configuration. The primary advantage is active production status and ROHS3 compliance, addressing the obsolescence of the original SMF05T1.

Q: What are the key differences between SMF05T1G and SMF05.TCT?

A: Both parts have identical voltage and current ratings (5V standoff, 12.5V clamping, 12A peak pulse). The difference is maximum operating temperature: SMF05T1G supports -55°C to 150°C, while SMF05.TCT supports -55°C to 125°C. For applications requiring operation above 125°C, SMF05T1G is the appropriate choice.

Q: When is PESD5V0L4UG,115 suitable as a substitute?

A: PESD5V0L4UG,115 is suitable only when application transient current requirements are 2.5A or lower and peak power dissipation does not exceed 30W. It shares the same 5V standoff voltage and package footprint but cannot handle the full 12A peak pulse current of the original SMF05T1. This part is recommended for lower-power protection circuits or automotive applications requiring AEC-Q100 qualification.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All substitute parts use the 5-TSSOP/SC-70-5/SOT-353 package, ensuring identical PCB footprint compatibility. No layout modifications are required for substitution.

Q: What is the impact of different capacitance values among substitute parts?

A: Capacitance differences (90pF for SMF05T1 and SMF05T1G, 150pF for SMF05.TCT, 16pF for PESD5V0L4UG,115) may affect high-frequency circuit behavior. For applications sensitive to parasitic capacitance, verify that the substitute part's capacitance value is acceptable for the target frequency range and circuit design.

Q: Which substitute part is recommended for new designs?

A: SMF05T1G is recommended for new designs. It provides direct electrical equivalence to the obsolete SMF05T1, active production status, and ROHS3 compliance. SMF05.TCT is an alternative if Semtech sourcing is preferred, provided the 125°C maximum temperature limit is acceptable.