SMDA24/TR7 Equivalent & Substitute Parts

Part Overview

The SMDA24/TR7 is a Transient Voltage Suppressor (TVS) diode manufactured by Microchip Technology, part of the TVSarray™ series. This surface-mount component provides transient overvoltage protection in general-purpose applications with a 24V reverse standoff voltage and 43V maximum clamping voltage. The device is actively produced and available in high inventory quantities. Equivalent and substitute parts are identified to support procurement flexibility, packaging format alternatives, and sourcing continuity.

Substiute Parts

SMDA24/TR7

Microchip TechnologyIn Stock: 1141SMDA24/TR7 Datasheet

Current PartRFQ

SMDB24/TR7

Microchip TechnologyIn Stock: 1354SMDB24/TR7 Datasheet

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SMDA24.TBT

Semtech CorporationIn Stock: 2168SMDA24.TBT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SMDA24/TR7 are classified based on electrical and mechanical compatibility within the TVS diode category. The primary substitution criteria are:

Critical Parameters for Substitution:

• Reverse Standoff Voltage: 24V (Typ)
• Breakdown Voltage (Min): 26.7V
• Peak Pulse Current: 5A (8/20µs)
• Package Type: 8-SOIC surface mount
• Unidirectional Channels: 4
• Power Rating: 300W peak pulse

Packaging Format Variations: Substitutes include alternative packaging formats (Tape & Reel vs. Cut Tape) from the same manufacturer, which maintain identical electrical specifications and mechanical compatibility while offering different supply configurations.

Cross-Manufacturer Alternatives: The SMDA24.TBT from Semtech Corporation provides electrical compatibility with the same reverse standoff voltage, breakdown voltage, and peak pulse current specifications. This part operates within the same thermal range and maintains the identical 8-SOIC package footprint, though with a higher maximum clamping voltage (55V vs. 43V) and different capacitance characteristics.

Parameter Comparison

Engineering Selection Recommendations

SMDB24/TR7 (Microchip Technology): This part is a direct electrical equivalent to the SMDA24/TR7, differing only in packaging format (Cut Tape vs. Tape & Reel). Selection of SMDB24/TR7 is appropriate when Cut Tape packaging is required for automated assembly processes or when Tape & Reel format is unavailable. Both parts maintain identical electrical performance, thermal ratings, and compliance status.

SMDA24.TBT (Semtech Corporation): This cross-manufacturer substitute maintains compatibility in reverse standoff voltage, breakdown voltage, peak pulse current, and package footprint. The SMDA24.TBT features a higher maximum clamping voltage (55V vs. 43V) and lower capacitance (60pF vs. 90pF @ 1MHz), resulting in different transient response characteristics. The operating temperature range is reduced to -55°C ~ 125°C (TJ) compared to the main part's -55°C ~ 150°C range. The SMDA24.TBT is ROHS3 compliant, whereas the SMDA24/TR7 is RoHS non-compliant. Selection of SMDA24.TBT is appropriate when RoHS3 compliance is required or when the higher clamping voltage provides improved protection margins for the application.

Frequently Asked Questions (FAQ)

Q: Can SMDB24/TR7 be used as a direct replacement for SMDA24/TR7?

A: Yes. The SMDB24/TR7 is electrically identical to the SMDA24/TR7. The only difference is the packaging format: SMDB24/TR7 is supplied in Cut Tape (CT) format, while SMDA24/TR7 is supplied in Tape & Reel (TR) format. Both parts have identical electrical specifications, thermal ratings, and mechanical compatibility with 8-SOIC footprints.

Q: What are the differences between SMDA24.TBT and SMDA24/TR7?

A: The SMDA24.TBT differs in three key areas: (1) Manufacturer—Semtech Corporation vs. Microchip Technology; (2) Maximum clamping voltage—55V vs. 43V; (3) Capacitance—60pF vs. 90pF @ 1MHz; (4) Operating temperature range—-55°C ~ 125°C vs. -55°C ~ 150°C; (5) RoHS compliance—ROHS3 compliant vs. RoHS non-compliant. Reverse standoff voltage, breakdown voltage, peak pulse current, and package footprint remain identical.

Q: When should I select SMDA24.TBT over SMDA24/TR7?

A: Select SMDA24.TBT when RoHS3 compliance is a design requirement or when the higher clamping voltage (55V) provides additional protection margin for transient overvoltage events. Verify that the reduced operating temperature range (-55°C ~ 125°C vs. -55°C ~ 150°C) and lower capacitance (60pF vs. 90pF) are acceptable for the application.

Q: Are all substitute parts available in the same package footprint?

A: Yes. All listed substitute parts use the 8-SOIC (0.154", 3.90mm Width) package, ensuring mechanical and electrical compatibility with PCB layouts designed for the SMDA24/TR7.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging supplies components on a continuous reel suitable for high-volume automated assembly. Cut Tape (CT) packaging supplies components on individual tape segments, typically used for lower-volume production or manual assembly. Electrical and mechanical specifications remain identical between packaging formats.

Q: Can I use SMDA24.TBT in applications requiring the full -55°C ~ 150°C operating range?

A: No. The SMDA24.TBT is rated only to -55°C ~ 125°C (TJ). Applications requiring operation above 125°C must use SMDA24/TR7 or SMDB24/TR7, both rated to 150°C.