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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Semtech Corporation SMDA24C-8.TBT

Name: SMDA24C-8.TBT
Brand: Semtech Corporation
SKU: SMDA24C-8.TBT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SMDA24C-8.TBT

Manufacturer:: Semtech Corporation

Category:: TVS Diodes

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: SMDA24C-8.TBT.pdf

Description:: TVS DIODE 24VWM 43VC 14SO

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SMDA24C-8.TBT from Semtech is a transient diverting suppressor designed for high-energy EOS protection on 24V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A (8/20μs) peak pulse current handling, 27.5–28V clamping voltage at 40A, and 175pF junction capacitance - deployed in USB PD input protection and industrial load switch front-end circuits.

For engineers reviewing the SMDA24C-8.TBT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, temperature-stable clamping behavior, and direct alternatives for 24V bus protection in USB Type-C, IoT, and industrial equipment designs.

Technical Context

The SMDA24C-8.TBT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Its clamping voltage remains nearly constant across 24–40A (8/20μs) due to sub-20mΩ dynamic resistance and low R_DS(on) saturation.

Unlike conventional TVS diodes, SMDA24C-8.TBT maintains stable 27.5–28V clamping from −40°C to +125°C and exhibits minimal voltage rise with increasing temperature - critical for high-reliability 24V systems where thermal derating compromises traditional solutions.

Key Specifications

Parameter	Value and Actual Design Meaning
Working Voltage	24 V - matches nominal 24V industrial and USB PD bus rails without derating.
Clamping Voltage	27.5–28 V at 40A (8/20μs) - stays below 30V damage threshold of common 24V load switches and PD controllers.
Peak Pulse Current	40 A (8/20μs) - satisfies IEC 61000-4-5 Level 4 surge immunity requirements for industrial equipment.
ESD Withstand	±30 kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness standards.
Junction Capacitance	175 pF at 22V, 1 MHz - low enough for DC/low-speed power line protection without signal integrity impact.
Dynamic Resistance	20 mΩ - enables flat clamping curve and minimizes voltage overshoot during fast transients.
Operating Temperature	−40°C to +125°C - supports extended-range deployment in outdoor, automotive, and industrial environments.

Pinout & Package

Package: DFN 1.6 mm × 1.6 mm × 0.55 mm, 6-lead, Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3	GND	Common ground return path; all three pins must be connected to maximize surge current dissipation and minimize parasitic inductance.
4, 5, 6	IN	Protected line input; tied together to handle full 40A surge across parallel bond wires and package leads.

Key Features

Feature	Design Value
FET-based shunt architecture	Enables near-constant clamping voltage over full 24–40A range and −40°C to +125°C, unlike voltage-dependent TVS diodes.
Low dynamic resistance	20 mΩ ensures <0.8V additional drop at 40A, preserving margin between clamping and downstream IC absolute maximum ratings.
High EFT immunity	±4 kV per IEC 61000-4-4 (5/50 ns) - protects against repetitive fast transients in motor drives and PLC I/O modules.
Thermal stability	Clamping voltage variation <0.3 V across full temperature range - eliminates need for thermal derating in enclosure design.
Space-efficient packaging	1.6 mm × 1.6 mm footprint saves >60% board area vs. SO-8 or SMA TVS alternatives rated for equivalent surge energy.

Applications

USB PD Input Protection	Industrial Load Switch Front-End
Use Scenario: Protecting 24V USB PD power input on docking stations and portable power banks against lightning-induced surges and connector hot-plug transients. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed immediately after the Type-C receptacle, before the PD controller and buck converter. Use Value: Maintains 27.5–28V clamping at 40A and 125°C - prevents latch-up or gate oxide damage in PD controllers rated for 30V max V_IN.	Use Scenario: Safeguarding the VIN pin of industrial-grade load switches (e.g., ON Semi NIS513x, TI TPS2594x) in remote sensors and metering devices. IC Role / Device Role / Timing Role: First-line transient diverter upstream of the load switch's internal FET, limiting stress on its drain-source junction during surge events. Use Value: Clamps below 28V while delivering 40A surge current - keeps V_DS stress under safe operating area limits even at elevated ambient temperatures.
IoT Gateway Power Bus	Robotics Motor Drive Interface
Use Scenario: Securing 24V auxiliary power rail in cellular/NB-IoT gateways exposed to ESD during field maintenance and EFT noise in factory environments. IC Role / Device Role / Timing Role: Standalone transient suppressor on main 24V input, coordinated with upstream fuse and downstream LDOs. Use Value: Delivers ±30kV ESD and ±4kV EFT immunity without degrading 175pF capacitance - avoids interference with modem RF performance.	Use Scenario: Protecting 24V logic supply inputs on motor driver PCBs subject to inductive kickback from brushed DC or stepper motor coils. IC Role / Device Role / Timing Role: Fast-acting shunt device placed at motor driver power entry point, ahead of bulk capacitors and regulators. Use Value: Sub-20mΩ dynamic resistance diverts 40A surge energy away from sensitive control ICs within <100 ns - prevents reset or brownout.

USB PD Input Protection

Industrial Load Switch Front-End

Use Scenario: Protecting 24V USB PD power input on docking stations and portable power banks against lightning-induced surges and connector hot-plug transients.

IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed immediately after the Type-C receptacle, before the PD controller and buck converter.

Use Value: Maintains 27.5–28V clamping at 40A and 125°C - prevents latch-up or gate oxide damage in PD controllers rated for 30V max V_IN.

Use Scenario: Safeguarding the VIN pin of industrial-grade load switches (e.g., ON Semi NIS513x, TI TPS2594x) in remote sensors and metering devices.

IC Role / Device Role / Timing Role: First-line transient diverter upstream of the load switch's internal FET, limiting stress on its drain-source junction during surge events.

Use Value: Clamps below 28V while delivering 40A surge current - keeps V_DS stress under safe operating area limits even at elevated ambient temperatures.

IoT Gateway Power Bus

Robotics Motor Drive Interface

Use Scenario: Securing 24V auxiliary power rail in cellular/NB-IoT gateways exposed to ESD during field maintenance and EFT noise in factory environments.

IC Role / Device Role / Timing Role: Standalone transient suppressor on main 24V input, coordinated with upstream fuse and downstream LDOs.

Use Value: Delivers ±30kV ESD and ±4kV EFT immunity without degrading 175pF capacitance - avoids interference with modem RF performance.

Use Scenario: Protecting 24V logic supply inputs on motor driver PCBs subject to inductive kickback from brushed DC or stepper motor coils.

IC Role / Device Role / Timing Role: Fast-acting shunt device placed at motor driver power entry point, ahead of bulk capacitors and regulators.

Use Value: Sub-20mΩ dynamic resistance diverts 40A surge energy away from sensitive control ICs within <100 ns - prevents reset or brownout.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDS2211P	22V working voltage, 27.5–28V clamping at 40A, same DFN-6 package and FET-shunt architecture.	Optimized for 22V USB PD and lower-voltage industrial buses; slightly lower VRWM reduces leakage at 24V bias.	Select when system nominal voltage is ≤22V and tighter clamping margin is required below 28V.
uClamp2411ZA	24V VRWM, 33V clamping at 12A (8/20μs), 0.25pF capacitance, SOD-323 package.	Designed for CC/SBU lines in USB Type-C - not rated for 40A surge or power rail protection.	Use only for low-capacitance data-line protection; not a functional replacement for SMDA24C-8.TBT in power-line roles.

Compared with TDS2211P, SMDA24C-8.TBT offers higher 24V working voltage headroom for 24V industrial systems, while uClamp2411ZA serves entirely different low-capacitance signal-line use cases - neither provides direct 40A power-rail suppression capability like SMDA24C-8.TBT.

Availability

SMDA24C-8.TBT is available at Aetrix Electronics and suitable for USB PD docking stations, industrial load switch front-ends, and IoT gateway power bus protection requiring stable component supply across extended temperature and high-surge environments.

Supply support for SMDA24C-8.TBT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Semtech Corporation is a U.S.-based fabless semiconductor company specializing in high-performance analog and mixed-signal ICs for precision sensing, protection, and signal integrity.

SMDA24C-8.TBT belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace conventional TVS diodes in high-reliability 24V power rail protection where stable clamping and thermal resilience are critical.

FAQ

What is the maximum continuous operating voltage for SMDA24C-8.TBT?

The SMDA24C-8.TBT has a reverse stand-off voltage (V_RWM) of 24 V, meaning it can continuously block up to 24 V DC without conduction. This makes it suitable for nominal 24V industrial and USB PD power rails where sustained voltage operation is required without leakage-induced heating.

How does SMDA24C-8.TBT differ from standard TVS diodes in clamping behavior?

Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (V_C = V_BR + I_PP × R_DYN), SMDA24C-8.TBT uses a triggered FET shunt that maintains 27.5–28V clamping from 24A to 40A (8/20μs) and across −40°C to +125°C - eliminating thermal derating and ensuring consistent protection margins.

Can SMDA24C-8.TBT be used for protecting USB Type-C VBUS lines?

Yes - SMDA24C-8.TBT is explicitly validated for USB PD VBUS protection in 24V systems, including docking stations and portable power banks. Its 24V V_RWM, 40A surge rating, and stable 28V clamping ensure compatibility with USB PD 3.0 specifications and prevent damage to downstream PD controllers and buck converters.

What is the recommended PCB layout for optimal surge performance of SMDA24C-8.TBT?

Place SMDA24C-8.TBT as close as possible to the protected connector. Connect all three GND pins (1, 2, 3) to a solid ground plane using multiple vias, and tie all three IN pins (4, 5, 6) together with a short, wide trace. Avoid stubs or splits - this minimizes parasitic inductance and ensures full 40A current sharing across parallel paths.

Is SMDA24C-8.TBT RoHS and REACH compliant?

Yes - SMDA24C-8.TBT is Pb-free, halogen-free, and fully compliant with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Its DFN package uses UL 94V-0 molding compound and lead-free terminal finish, meeting global environmental and safety requirements for industrial and consumer electronics.

SMDA24C-8.TBT Specifications

Product attributes: Attribute value

Manufacturer:: Semtech Corporation

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Series:: SMDAC-8

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Zener

Unidirectional Channels:: -

Bidirectional Channels:: 8

Voltage - Reverse Standoff (Typ):: 24V (Max)

Voltage - Breakdown (Min):: 26.7V

Voltage - Clamping (Max) @ Ipp:: 43V

Current - Peak Pulse (10/1000µs):: 5A (8/20µs)

Power - Peak Pulse:: 300W

Power Line Protection:: No

Applications:: General Purpose

Capacitance @ Frequency:: 50pF @ 1MHz

Operating Temperature:: -55°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

SMDA24C-8.TBT FAQ

1.How can I place an order for SMDA24C-8.TBT through Aetrix?

Please submit a Request for Quotation (RFQ) for SMDA24C-8.TBT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SMDA24C-8.TBT reliable?

The price and inventory of SMDA24C-8.TBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA24C-8.TBT is usually 5 days.

3.What payment methods are accepted for SMDA24C-8.TBT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA24C-8.TBT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SMDA24C-8.TBT?

SMDA24C-8.TBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SMDA24C-8.TBT order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SMDA24C-8.TBT?

For technical support, including SMDA24C-8.TBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA24C-8.TBT requirements.

6.How does Aetrix verify that SMDA24C-8.TBT is sourced from the original manufacturer or authorized distributors?

All SMDA24C-8.TBT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMDA24C-8.TBT meets industry standards.

7.What is the process for return or replacement of SMDA24C-8.TBT?

All SMDA24C-8.TBT units undergo pre-shipment inspection (PSI). If there is an issue with SMDA24C-8.TBT, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SMDA24C-8.TBT part is unused and in its original packaging.

Return procedure for SMDA24C-8.TBT:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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