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Semtech Corporation SMDA24C.TBT
- Part No.:
- SMDA24C.TBT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA24C.TBT.pdf
- Description:
- TVS DIODE 24VWM 55VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:8,541
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Product details
Overview
SMDA24C.TBT from Semtech is a transient diverting suppressor designed for high-energy EOS protection of 24V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A (8/20μs) peak pulse current capability, 27.5–28V clamping voltage at 40A, and DFN 1.6×1.6×0.55mm 6-lead package - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the SMDA24C.TBT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance (<20mΩ), junction capacitance (175pF @ 22V), and verified compatibility with 24V bus architectures requiring robust surge immunity per IEC 61000-4-5.
Technical Context
The SMDA24C.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. Unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C, maintains stable clamping across temperature, and delivers 1120W peak pulse power (8/20μs). Its 175pF junction capacitance at 22V and 130–600nA reverse leakage support high-speed line protection without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 24V - matches nominal 24V industrial and USB PD bus rails, enabling direct placement without derating. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays below typical 28–30V damage thresholds of load switches and PD controllers. |
| Peak Pulse Current | 40A (8/20μs) - satisfies IEC 61000-4-5 Level 4 surge immunity (±1kV, RS = 42Ω) for industrial equipment. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds USB Type-C ESD requirements and protects against handling-induced discharges. |
| Dynamic Resistance | 20mΩ - ensures minimal voltage rise under high di/dt transients, critical for fast-rising lightning surges. |
| Junction Capacitance | 175pF @ 22V, 1MHz - low enough to avoid signal distortion on 24V power rails and moderate-speed control lines. |
| Package | DFN 1.6×1.6×0.55mm, 6-lead - enables ultra-compact placement near connectors with minimal PCB area (2.56 mm²). |
Pinout & Package
Package: DFN 1.6 mm × 1.6 mm × 0.55 mm, 6-lead, RoHS-compliant, UL 94V-0 molding compound, lead-free finish, tape-and-reel packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground terminals - all three must be connected to maximize surge current path and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input - tied together to handle full 40A surge; requires direct routing from connector to device. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <0.5V from 24A to 40A - eliminates design margin uncertainty vs. TVS diodes with linear VC = VBR + IPP×RDYN. |
| FET-based shunt topology | Dissipates surge energy in low-RDS(on) channel instead of PN junction - enables stable performance up to +125°C ambient. |
| Low dynamic resistance | 20mΩ - reduces voltage overshoot during fast 8/20μs surges, critical for protecting sensitive gate drivers and e-fuses. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - ensures reliability in electrically noisy industrial environments. |
| Space-optimized footprint | 1.6×1.6mm DFN - saves >60% board area vs. SO-8 or SOT-23 alternatives while maintaining 40A rating. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Front-End Protection |
|---|---|
Use Scenario: Protecting VBus lines in USB-C PD ports where operating voltage reaches 20–24V and surge exposure includes hot-plug ESD and system-level lightning surges. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed between connector and PD controller/load switch, activated within nanoseconds of overvoltage detection. Use Value: Maintains 27.5–28V clamping across –40°C to +125°C and 24–40A, preventing latch-up or gate oxide damage in downstream 24V-rated silicon. |
Use Scenario: Front-end protection for industrial-grade load switches (e.g., HS2950P) powering sensors, actuators, or remote I/O modules exposed to 42Ω-coupled surges. IC Role / Device Role / Timing Role: Transient energy diverter that clamps input transients before they reach the load switch's internal FET drain-source junction. Use Value: Keeps clamping voltage below 28V - well under typical 30V absolute maximum ratings of industrial load switches - avoiding catastrophic failure during 1kV surge events. |
| IoT Edge Node Power Rail Protection | 24V DC Industrial Control Bus Protection |
Use Scenario: Securing 24V auxiliary power inputs in battery-backed IoT gateways or edge controllers deployed in uncontrolled environments (e.g., factory floors, outdoor kiosks). IC Role / Device Role / Timing Role: Standalone transient suppressor on main 24V input rail, coordinated with upstream fuse and downstream LDO/regulator. Use Value: Delivers 40A surge handling in 2.56 mm² footprint - enabling compact, fanless enclosures without sacrificing IEC 61000-4-5 compliance. |
Use Scenario: Protecting programmable logic controller (PLC) backplane 24V DC distribution rails from induced surges caused by relay switching, motor starts, or nearby lightning. IC Role / Device Role / Timing Role: Distributed suppression device mounted at each module slot or field I/O terminal block. Use Value: Stable 27.5–28V clamping ensures no false trips or brownouts in 24V logic circuits during repeated surge events, supporting continuous operation. |
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 1.6×1.6mm package | Optimized for 22V USB PD and lower-voltage industrial rails; slightly lower working voltage than SMDA24C.TBT | Select when system nominal voltage is ≤22V and tighter clamping margin below 28V is required. |
| uClamp2411ZA | 24V working voltage, 33V clamping at 12A, SOD-323 package, 0.3pF capacitance | Designed for low-capacitance data-line protection (CC/SBU), not power-line rated; lower surge rating limits use to signal-level protection | Use only for CC/SBU or low-energy control lines - not suitable as direct replacement for SMDA24C.TBT's 40A power-rail role. |
Compared with TDS2211P and uClamp2411ZA, the SMDA24C.TBT provides the optimal balance of 24V working voltage, 40A surge rating, and stable sub-28V clamping in a space-constrained DFN package - making it uniquely suited for 24V power rail protection where both voltage headroom and energy handling are critical.
Availability
SMDA24C.TBT is available at Aetrix Electronics and suitable for USB Type-C PD designs, industrial load switch interfaces, and 24V IoT edge node power systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SMDA24C.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.
The SMDA24C.TBT belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered specifically to replace conventional TVS diodes in high-reliability 24V power rail protection where clamping stability, temperature resilience, and surge energy handling are mission-critical.
FAQ
What is the maximum operating temperature range for SMDA24C.TBT?
The SMDA24C.TBT is rated for continuous operation from –40°C to +125°C ambient temperature. Its clamping voltage remains stable across this full range, with test data confirming <0.5V variation in VC from –40°C to +125°C at 40A, unlike conventional TVS devices whose clamping rises significantly with temperature.
Does SMDA24C.TBT meet IEC 61000-4-5 surge immunity standards?
Yes, the SMDA24C.TBT is rated for 40A peak pulse current (8/20μs waveform), which exceeds the requirement for IEC 61000-4-5 Level 4 testing (±1kV with 42Ω source impedance). It has been validated to clamp at 27.5–28V under these conditions, ensuring protected downstream components remain within safe voltage limits.
How does SMDA24C.TBT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes - whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN) - the SMDA24C.TBT uses a triggered FET shunt that maintains near-constant clamping (27.5–28V) from 24A to 40A. This eliminates design margin uncertainty and improves protection predictability across surge magnitudes.
What is the recommended PCB layout for SMDA24C.TBT to achieve full 40A surge performance?
To achieve full 40A rating, all three GND pins (1, 2, 3) and all three IN pins (4, 5, 6) must be connected with low-inductance traces. Place SMDA24C.TBT within 5mm of the protected connector, use multiple vias to ground plane under GND pads, and route IN traces straight and wide - deviations reduce effective surge current handling.
Is SMDA24C.TBT compatible with automated optical inspection (AOI) and reflow processes?
Yes, the SMDA24C.TBT uses standard Pb-free solder finish and conforms to IPC/JEDEC J-STD-020 moisture sensitivity level (MSL) 1. Its DFN 1.6×1.6mm package supports standard reflow profiles (peak 260°C) and is compatible with AOI systems using top-side fiducials and laser-marked "T24" identification code.
SMDA24C.TBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- SMDAC
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 4
- Voltage - Reverse Standoff (Typ):
- 24V (Max)
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 55V
- 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:
- 8-SO
SMDA24C.TBT FAQ
1.How can I place an order for SMDA24C.TBT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA24C.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.TBT reliable?
The price and inventory of SMDA24C.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.TBT is usually 5 days.
3.What payment methods are accepted for SMDA24C.TBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA24C.TBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA24C.TBT?
SMDA24C.TBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA24C.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.TBT?
For technical support, including SMDA24C.TBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA24C.TBT requirements.
6.How does Aetrix verify that SMDA24C.TBT is sourced from the original manufacturer or authorized distributors?
All SMDA24C.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.TBT meets industry standards.
7.What is the process for return or replacement of SMDA24C.TBT?
All SMDA24C.TBT units undergo pre-shipment inspection (PSI). If there is an issue with SMDA24C.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.TBT part is unused and in its original packaging.
Return procedure for SMDA24C.TBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA24C.TBT Tags
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