SMF05CT1 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SMF05CT1 is a unidirectional transient voltage suppressor diode manufactured by onsemi, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 5V reverse standoff voltage with 12.5V maximum clamping voltage and 8A peak pulse current capability in a 6-TSSOP (SC-88/SC70-6/SOT-363) package.

The SMF05CT1 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this TVS diode specification.

Substiute Parts

SMF05CT1

onsemiIn Stock: 6309SMF05CT1 Datasheet

Current PartRFQ

SMF05CT1G

onsemiIn Stock: 57284SMF05CT1G Datasheet

DirectRFQ

SMF05C.TCT

Semtech CorporationIn Stock: 305286SMF05C.TCT Datasheet

UpgradeRFQ

PESD5V0L5UY,115

Nexperia USA Inc.In Stock: 30028PESD5V0L5UY,115 Datasheet

SimilarRFQ

PESD5V0L5UY,125

Nexperia USA Inc.In Stock: 20301PESD5V0L5UY,125 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMF05CT1 are categorized based on electrical parameter compatibility and product availability status. The critical parameters determining substitution eligibility are:

• Reverse standoff voltage: 5V (Max)
• Clamping voltage: 12.5V maximum
• Peak pulse current: 8A (8/20µs)
• Peak pulse power: 100W
• Package compatibility: 6-TSSOP/SC-88/SOT-363
• Unidirectional channel configuration: 5 channels

Direct Equivalent (Same Electrical Specifications): SMF05CT1G (onsemi) — Identical electrical parameters with active product status and RoHS3 compliance.

Upgrade Equivalent (Enhanced Specifications): SMF05C.TCT (Semtech Corporation) — Maintains core voltage and current ratings with extended operating temperature range (-55°C to 125°C) and RoHS3 compliance. Package variant: SC-70-6.

Similar Alternatives (Reduced Current Rating): PESD5V0L5UY,115 and PESD5V0L5UY,125 (Nexperia USA Inc.) — Share voltage specifications (5V standoff, 12V clamping) but feature reduced peak pulse current (2.5A) and power dissipation (25W). Both include automotive-grade qualification (AEC-Q100) and extended temperature range (-65°C to 150°C).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): SMF05CT1G is the primary substitute for the obsolete SMF05CT1. Both components share identical electrical parameters, package configuration, and channel count. SMF05CT1G carries active product status and RoHS3 compliance, making it suitable for new designs and ongoing production support.

For Enhanced Environmental Performance: SMF05C.TCT (Semtech Corporation) provides equivalent electrical performance with an extended operating temperature range (-55°C to 125°C versus -40°C to 125°C). This variant is appropriate for applications requiring broader temperature operation while maintaining the same voltage and current specifications. RoHS3 compliance is confirmed.

For Automotive and Cost-Optimized Applications: PESD5V0L5UY,115 and PESD5V0L5UY,125 (Nexperia) are suitable only for applications where peak pulse current requirements do not exceed 2.5A and peak power dissipation does not exceed 25W. These parts offer automotive-grade qualification (AEC-Q100) and extended temperature range (-65°C to 150°C). Selection between the two variants depends on packaging preference (Tape & Reel versus Cut Tape & Digi-Reel).

Applications requiring the full 8A peak pulse current and 100W power dissipation of the original SMF05CT1 cannot use the Nexperia alternatives without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can SMF05CT1G be used as a direct replacement for SMF05CT1? A: Yes. SMF05CT1G is electrically and mechanically identical to SMF05CT1, with the advantage of active product status and RoHS3 compliance. No circuit modifications are required.

Q: What is the primary difference between SMF05CT1G and SMF05C.TCT? A: Both maintain identical voltage and current ratings. SMF05C.TCT extends the operating temperature range to -55°C (versus -40°C minimum) and uses a SC-70-6 package variant. Selection depends on temperature requirements and package compatibility with existing PCB layouts.

Q: Can PESD5V0L5UY parts replace SMF05CT1 in all applications? A: No. The Nexperia PESD5V0L5UY series is limited to 2.5A peak pulse current and 25W power dissipation, compared to 8A and 100W for SMF05CT1. These alternatives are suitable only for lower-power transient suppression circuits. Applications requiring full 8A capability must use SMF05CT1G or SMF05C.TCT.

Q: Are all substitute parts RoHS compliant? A: SMF05CT1G, SMF05C.TCT, PESD5V0L5UY,115, and PESD5V0L5UY,125 are all RoHS3 compliant. The original SMF05CT1 is RoHS non-compliant.

Q: Which substitute offers automotive qualification? A: PESD5V0L5UY,115 and PESD5V0L5UY,125 carry AEC-Q100 automotive-grade qualification. SMF05CT1G and SMF05C.TCT do not list automotive qualification in the provided specifications.

Q: What is the capacitance difference between substitutes? A: SMF05CT1 and SMF05CT1G both measure 80pF @ 1MHz. SMF05C.TCT measures 130pF @ 1MHz, while PESD5V0L5UY variants measure 16pF @ 1MHz. Capacitance differences may affect high-frequency circuit performance and should be evaluated in signal-sensitive applications.

Q: Are package dimensions identical across all substitutes? A: All parts use 6-TSSOP/SC-88/SOT-363 package family. SMF05C.TCT specifies SC-70-6 as the supplier device package, which may have minor dimensional variations. PCB layout compatibility should be confirmed before design finalization.