SM8LC05/TR13 Equivalent & Substitute Parts

Part Overview

The SM8LC05/TR13 is a bidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection applications. This surface-mount component features a 5V reverse standoff voltage, 11V maximum clamping voltage, and 5A peak pulse current rating in an 8-SOIC package. The device is classified as Active product status and operates across a temperature range of -55°C to 150°C. Substitute parts are identified to address inventory availability, compliance requirements, or specific application constraints while maintaining electrical and mechanical compatibility.

Substiute Parts

SM8LC05/TR13

Microchip TechnologyIn Stock: 2648SM8LC05/TR13 Datasheet

Current PartRFQ

LCDA05.TBT

Semtech CorporationIn Stock: 18303LCDA05.TBT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SM8LC05/TR13 are identified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Critical Matching Parameters:

• Voltage - Reverse Standoff: 5V
• Voltage - Breakdown (Min): 6V
• Voltage - Clamping (Max) @ Ipp: 11V
• Current - Peak Pulse (8/20µs): 5A
• Bidirectional Channels: 2
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

The LCDA05.TBT from Semtech Corporation meets all critical electrical specifications and mechanical package requirements, confirming functional equivalence for general-purpose TVS diode applications. Both devices operate within compatible temperature ranges and share identical reverse standoff and clamping voltage characteristics.

Parameter Comparison

Engineering Selection Recommendations

SM8LC05/TR13 (Microchip Technology):

• Primary selection for applications requiring maximum peak pulse power dissipation (500W) and higher capacitance characteristics (25pF @ 1MHz)
• Suitable for designs operating across the full temperature range to 150°C
• Product status: Active with 2592 units in stock
• RoHS non-compliant; applicable for legacy systems or applications without RoHS requirements

LCDA05.TBT (Semtech Corporation):

• Equivalent substitute for general-purpose TVS protection where peak pulse power dissipation of 300W is sufficient
• Recommended for applications requiring ROHS3 compliance
• Operating temperature range limited to 125°C; suitable for standard industrial and commercial applications
• Product status: Active with 18251 units in stock
• Lower capacitance (5pF @ 1MHz) appropriate for high-frequency signal integrity applications

Both devices are electrically and mechanically interchangeable for the core TVS diode function within their respective operational constraints.

Frequently Asked Questions (FAQ)

Q: Can LCDA05.TBT replace SM8LC05/TR13 in all applications?

A: LCDA05.TBT is electrically equivalent for TVS protection function, matching all critical voltage and current specifications. However, two differences require evaluation: (1) Maximum operating temperature is 125°C versus 150°C for the SM8LC05/TR13, and (2) Peak pulse power rating is 300W versus 500W. Applications operating above 125°C or requiring 500W dissipation must use the SM8LC05/TR13.

Q: What are the key electrical parameters that define substitution compatibility?

A: Substitution compatibility is determined by: Reverse Standoff Voltage (5V), Breakdown Voltage minimum (6V), Clamping Voltage maximum (11V), Peak Pulse Current (5A at 8/20µs), and Bidirectional Channel count (2). All substitute parts must match these specifications exactly.

Q: Are the packages identical between SM8LC05/TR13 and LCDA05.TBT?

A: Yes. Both devices use the 8-SOIC package with 0.154" width (3.90mm), confirming mechanical and PCB layout compatibility. Surface-mount assembly processes are identical.

Q: What is the significance of the capacitance difference (25pF vs. 5pF)?

A: Capacitance affects high-frequency signal integrity and switching performance. The SM8LC05/TR13 exhibits higher capacitance (25pF @ 1MHz), while LCDA05.TBT exhibits lower capacitance (5pF @ 1MHz). Applications sensitive to capacitive loading or operating at high frequencies should select based on this parameter.

Q: Does RoHS compliance affect functional performance?

A: RoHS compliance status does not affect electrical performance or functionality. ROHS3 compliance of LCDA05.TBT indicates lead-free construction and environmental compliance, relevant for procurement and regulatory requirements. Selection depends on system-level compliance mandates.

Q: What packaging formats are available for these parts?

A: SM8LC05/TR13 is supplied in Cut Tape (CT) format. LCDA05.TBT is available in both Cut Tape (CT) and Digi-Reel® formats, providing flexibility for different assembly and procurement workflows.