SMDA24C-8/TR13 Equivalent & Substitute Parts

Part Overview

The SMDA24C-8/TR13 is a bidirectional transient voltage suppressor (TVS) diode array manufactured by Microchip Technology. This component provides protection against transient voltage spikes in general-purpose applications through eight integrated Zener diode channels in a 14-SOIC surface mount package. The part is classified as obsolete, necessitating identification of active equivalent components that maintain functional compatibility within the same electrical and mechanical specifications.

Substiute Parts

SMDA24C-8/TR13

Microchip TechnologyIn Stock: 1012SMDA24C-8/TR13 Datasheet

Current PartRFQ

SMDA24C-8.TBT

Semtech CorporationIn Stock: 1782SMDA24C-8.TBT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SMDA24C-8/TR13 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Criteria:

• Bidirectional channel count: 8 channels
• Voltage - Reverse Standoff: 24V nominal
• Voltage - Breakdown (Min): 26.7V
• Current - Peak Pulse rating: 5A (8/20µs)
• Power - Peak Pulse: 300W
• Package type: 14-SOIC surface mount
• Physical dimensions: 0.154" width (3.90mm)

Allowable Variation Parameters:

• Voltage - Clamping (Max) @ Ipp: Substitute parts may exhibit lower clamping voltages while maintaining the same standoff and breakdown specifications
• Operating Temperature Range: Substitute parts may have reduced upper temperature limits
• Capacitance @ 1MHz: Substitute parts may exhibit different capacitance values
• RoHS Compliance: Substitute parts may have improved compliance status
• Product Status: Active substitutes are preferred over obsolete originals

The SMDA24C-8.TBT from Semtech Corporation qualifies as a direct substitute based on matching all mandatory criteria while offering improved product status and compliance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The SMDA24C-8.TBT from Semtech Corporation is a direct functional substitute for the obsolete SMDA24C-8/TR13. Selection of the Semtech component is supported by the following engineering factors:

Product Status: The SMDA24C-8.TBT maintains active product status, ensuring continued availability and manufacturing support. The original Microchip component is classified as obsolete, creating supply chain risk.

Compliance Certification: The SMDA24C-8.TBT is RoHS compliant, whereas the original part is non-compliant. This provides improved environmental and regulatory alignment for new designs and procurement cycles.

Electrical Equivalence: Both components maintain identical reverse standoff voltage (24V), breakdown voltage (26.7V minimum), peak pulse current (5A at 8/20µs), and peak pulse power (300W). These parameters define the core protective function of the TVS diode array.

Package Compatibility: Both components utilize the 14-SOIC surface mount package with identical physical dimensions (0.154" width, 3.90mm), ensuring direct PCB layout compatibility without redesign.

Parameter Variations: The SMDA24C-8.TBT exhibits a lower clamping voltage (43V versus 55V) and reduced upper operating temperature limit (125°C versus 150°C). These variations are acceptable in applications where the original specifications exceed system requirements. The higher capacitance value (50pF versus 35pF) may require evaluation in high-frequency signal integrity applications.

Frequently Asked Questions (FAQ)

Q: Can the SMDA24C-8.TBT directly replace the SMDA24C-8/TR13 without PCB modifications?

A: Yes. Both components use the 14-SOIC surface mount package with identical physical dimensions and pinout configuration. No PCB layout changes are required for mechanical or electrical interface compatibility.

Q: What is the significance of the lower clamping voltage (43V vs. 55V) in the Semtech substitute?

A: The clamping voltage represents the maximum voltage across the TVS diode during a transient event at peak pulse current. The lower clamping voltage of the Semtech part provides more aggressive voltage suppression. This is acceptable in applications where the original 55V specification was not a minimum requirement. Verify that 43V clamping meets the protection threshold of downstream components in your circuit.

Q: Does the reduced operating temperature range (-55°C to 125°C vs. -55°C to 150°C) affect suitability?

A: The reduced upper temperature limit applies to the junction temperature during operation. Evaluate whether your application environment and thermal design maintain junction temperatures below 125°C. For most general-purpose applications operating at standard ambient temperatures with adequate PCB thermal management, this reduction does not present a constraint.

Q: Why does the Semtech part have higher capacitance (50pF vs. 35pF)?

A: Capacitance variation is inherent to TVS diode manufacturing and does not affect the core transient suppression function. Higher capacitance may introduce additional loading on high-frequency signal lines. Assess impact in applications where signal integrity at frequencies above 1MHz is critical.

Q: Is the RoHS compliance difference important for my application?

A: RoHS compliance status affects regulatory acceptance, supply chain qualification, and long-term availability. The SMDA24C-8.TBT's RoHS compliance provides alignment with modern environmental standards and reduces risk of future component obsolescence due to regulatory restrictions.

Q: Are there any pinout or functional differences between these components?

A: No. Both components are 8-channel bidirectional TVS diode arrays in 14-SOIC packages with identical pinout and functional architecture. Electrical performance differences are limited to the specified parameter variations documented in the Parameter Comparison table.