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Semtech Corporation SMDA05C.TBT
- Part No.:
- SMDA05C.TBT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA05C.TBT.pdf
- Description:
- TVS DIODE 5VWM 11VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,095
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Product details
Overview
SMDA05C.TBT from Semtech is a transient diverting suppressor designed for high-energy EOS/ESD protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and ultra-low 20mΩ dynamic resistance. It protects USB Type-C power delivery buses, load switch inputs, and industrial I/O interfaces.
For engineers reviewing the SMDA05C.TBT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world clamping stability data across temperature and current, and validated alternatives for 22V bus protection in USB PD and IoT systems.
Technical Context
The SMDA05C.TBT uses a surge-rated FET as its primary protection element, activated by an integrated 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 and across –40°C to +125°C due to decreasing RDS(on) under surge conditions.
It operates with reverse stand-off voltage of 22V, breakdown voltage of 25–27.9V (It = 1mA), and junction capacitance of 175pF at 22V/1MHz. Its 6-pin DFN package (1.6 × 1.6 × 0.55 mm) assigns pins 1–3 to GND and pins 4–6 to IN, requiring all three terminals per side to be connected for full 40A rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC or RMS operating voltage on protected line without leakage or degradation |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave, RS = 2Ω) - ensures downstream 24V-rated ICs (e.g., USB PD controllers) remain below damage threshold |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD input stages |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD requirements without external shielding |
| Dynamic Resistance | 20mΩ (measured 1–40A, 8/20μs) - enables flat clamping curve and minimizes voltage overshoot during fast transients |
| Junction Capacitance | 175pF at 22V/1MHz - low enough for 22V power rail protection without signal integrity impact on adjacent traces |
Pinout & Package
Package: DFN-6 (1.6 mm × 1.6 mm × 0.55 mm), Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound, tape-and-reel packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to minimize inductance and achieve full 40A rating |
| Pins 4, 5, 6 | IN | Input terminal for protected line (e.g., VBUS in USB Type-C); all three pins are internally paralleled and must be shorted externally |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping over current range | 27.5–28V from 24A to 40A - eliminates need for oversized IPP derating to meet voltage safety margins |
| Stable clamping over temperature | No increase in VC from –40°C to +125°C - enables reliable protection in unheated enclosures and high-ambient industrial environments |
| Low dynamic resistance | 20mΩ - reduces I²R heating during surge, enabling smaller PCB footprints vs. TVS solutions with higher RDYN |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz) - protects against repetitive burst noise in motor drives and PLC I/O |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBUS lines in USB-C ports supporting up to 20V/5A PD negotiation, exposed to ESD from hot-plug events and lightning-induced surges. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed directly at connector, clamping transients before they reach PD controller and buck-boost ICs. Use Value: Maintains 27.5–28V clamping at full 40A even at 125°C-prevents latch-up or gate oxide damage in 24V-tolerant PD controllers where standard TVS would exceed 38V. |
Use Scenario: Safeguarding enable and input pins of high-side load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage stress on internal FET gate oxide and overvoltage protection circuitry. Use Value: Prevents permanent failure of load switches during 1kV/42Ω IEC 61000-4-5 surges by holding clamping voltage well below 30V absolute max ratings. |
| IoT Device Power Rail Protection | Storage Device 22V Backup Supply Protection |
Use Scenario: Securing 22V auxiliary rails in battery-backed smart sensors and edge gateways subjected to ESD during field servicing and conducted surges via shared power cables. IC Role / Device Role / Timing Role: Solid-state transient suppressor replacing Zener-based or MOV solutions to eliminate leakage drift and aging effects. Use Value: 130–600nA reverse leakage at 22V ensures minimal standby current drain-critical for multi-year battery life in LPWAN nodes. |
Use Scenario: Protecting 22V supercapacitor or LiFePO₄ backup supplies in NVMe SSDs and enterprise storage controllers against ESD during board insertion and surge coupling from adjacent AC lines. IC Role / Device Role / Timing Role: Low-capacitance (175pF), high-power shunt device placed between backup rail and ground to clamp transients without affecting charge/discharge timing. Use Value: Enables use of compact 1.6×1.6mm footprint instead of larger SO-8 TVS arrays-preserving space on dense storage controller PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P.C | Identical electrical specs, same DFN-6 package, identical pinout and marking (T22XX), but differs only in reel quantity (3,000 pcs vs. unspecified for SMDA05C.TBT) | Valid drop-in replacement; used interchangeably in Semtech's official USB Type-C reference designs | Select TDS2211P.C when standard 7″ reel volume (3k units) aligns with production planning |
| uClamp2411ZA | 24V working voltage, ±30kV ESD, but lower 20A IPP (8/20μs) and higher 30V clamping at 20A; SOD-323 package (smaller, 2-pin) | Suitable for CC/SBU lines in USB-C, not for 22V VBUS or high-current load switch inputs | Choose uClamp2411ZA only for low-capacitance (<0.5pF), low-current signal-line protection-not for power rail duty |
Compared with TDS2211P.C and uClamp2411ZA, SMDA05C.TBT offers identical high-current (40A), low-clamp (28V), and thermally stable performance in the same DFN-6 footprint-making it optimal for 22V power rail protection where surge energy handling and thermal robustness are critical, unlike the signal-focused uClamp or volume-optimized TDS2211P.C variant.
Availability
SMDA05C.TBT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT device 22V auxiliary rails requiring stable component supply, long-term lifecycle support, and guaranteed surge performance across temperature extremes.
Supply support for SMDA05C.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 semiconductors for power management, protection, and signal integrity.
SMDA05C.TBT belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace traditional TVS diodes in high-energy EOS applications where stable clamping, temperature independence, and low dynamic resistance are essential.
FAQ
What is the maximum continuous operating voltage for SMDA05C.TBT?
The SMDA05C.TBT has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously block up to 22V DC or RMS without significant leakage current. This makes it suitable for protecting 22V power rails such as USB PD VBUS, industrial 24V systems, and backup supplies where sustained voltage operation is required.
Does SMDA05C.TBT require external bias or control signals to operate?
No, SMDA05C.TBT is a fully passive, self-triggering device. It contains an integrated precision trigger circuit and surge-rated FET that activate automatically when transient voltage exceeds the breakdown threshold (~25–27.9V). No external power, enable pins, or configuration are needed-SMDA05C.TBT functions immediately upon installation.
How does SMDA05C.TBT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (VC = VBR + IPP × RDYN), SMDA05C.TBT maintains a near-constant clamping voltage of 27.5–28V from 24A to 40A due to its FET-based architecture and ultra-low 20mΩ dynamic resistance-ensuring consistent protection across surge severity levels.
Can SMDA05C.TBT be used on high-speed data lines like USB SuperSpeed or PCIe?
No, SMDA05C.TBT is not intended for high-speed signal lines. With 175pF junction capacitance, it is optimized for 22V power rails and low-frequency I/O protection. For USB SS, DP/DM, or PCIe lanes, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF); using SMDA05C.TBT there would severely degrade signal integrity.
What PCB layout practices maximize surge performance for SMDA05C.TBT?
To maximize SMDA05C.TBT performance, place it within 2 mm of the protected connector; connect all three IN pins (4–6) with a single low-inductance trace; tie all three GND pins (1–3) directly to a solid ground plane using ≥3 vias; avoid thermal relief on GND pads; and ensure no sensitive traces run parallel beneath the device-these steps preserve its 40A capability and sub-28V clamping.
SMDA05C.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):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 11V
- Current - Peak Pulse (10/1000µs):
- 17A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 350pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
SMDA05C.TBT FAQ
1.How can I place an order for SMDA05C.TBT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA05C.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 SMDA05C.TBT reliable?
The price and inventory of SMDA05C.TBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA05C.TBT is usually 5 days.
3.What payment methods are accepted for SMDA05C.TBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA05C.TBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA05C.TBT?
SMDA05C.TBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA05C.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 SMDA05C.TBT?
For technical support, including SMDA05C.TBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA05C.TBT requirements.
6.How does Aetrix verify that SMDA05C.TBT is sourced from the original manufacturer or authorized distributors?
All SMDA05C.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 SMDA05C.TBT meets industry standards.
7.What is the process for return or replacement of SMDA05C.TBT?
All SMDA05C.TBT units undergo pre-shipment inspection (PSI). If there is an issue with SMDA05C.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 SMDA05C.TBT part is unused and in its original packaging.
Return procedure for SMDA05C.TBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA05C.TBT Tags
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