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Semtech Corporation SMDA05.TBT
- Part No.:
- SMDA05.TBT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA05.TBT.pdf
- Description:
- TVS DIODE 5VWM 11VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
SMDA05.TBT from Semtech is a transient diverting suppressor designed for high-energy EOS protection on 22V DC power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A (8/20μs) peak pulse current handling, and stable 27.5–28V clamping voltage across temperature and current range - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the SMDA05.TBT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world clamping behavior vs. conventional TVS, and validated alternatives for 22V bus protection in compact, thermally robust designs.
Technical Context
SMDA05.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 threshold. Unlike standard TVS diodes, its clamping voltage remains nearly constant due to decreasing RDS(on) under surge conditions.
The device operates over −40°C to +125°C with 22V reverse stand-off voltage, 27.9V typical breakdown, and 20mΩ dynamic resistance (measured 1–40A, 8/20μs), enabling reliable protection where thermal drift and current-dependent clamping are critical design constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage before leakage or conduction begins. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures protected ICs (e.g., USB PD controllers) remain below damage thresholds during worst-case surges. |
| ESD Rating | ±30kV contact & air (IEC 61000-4-2) - meets highest-level system-level ESD immunity without external shielding. |
| Peak Pulse Current | 40A (8/20μs) - supports compliance with IEC 61000-4-5 Level 4 (±1kV, RS = 42Ω) on unsymmetrical lines. |
| Junction Capacitance | 175pF @ 22V, 1MHz - low enough for 22V power rail protection without signal integrity impact on adjacent traces. |
| Dynamic Resistance | 20mΩ - enables flat clamping curve and minimizes voltage rise under increasing surge current. |
| Operating Temp | −40°C to +125°C - maintains specified clamping and leakage performance across automotive and industrial ambient ranges. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 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 for surge current; all three pins must be connected to maximize current sharing and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS in USB-C); parallel connection of all three pins required for full 40A rating and optimal thermal distribution. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Delivers near-constant clamping voltage (27.5–28V) across 1–40A surge range, unlike voltage-rising TVS diodes. |
| Low dynamic resistance | 20mΩ enables minimal IR drop under surge, preserving margin between clamping and protected IC's absolute max rating. |
| High-temperature stability | Clamping voltage variation <0.5V from −40°C to +125°C - eliminates derating calculations for industrial thermal environments. |
| Compact DFN footprint | 1.6mm × 1.6mm saves >60% board area vs. comparable SO-8 or SOT-23 TVS solutions while supporting same surge energy. |
| Integrated trigger circuit | Activates shunt FET precisely at breakdown threshold (25–27.9V), avoiding premature conduction or delayed response. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V VBUS lines in USB-C receptacles against ESD, lightning-induced surges, and hot-plug transients. IC Role / Device Role / Timing Role: Primary front-end transient suppressor placed directly at connector, clamping surges before reaching PD controller and e-fuse. Use Value: Maintains 27.5V clamping at 40A and 125°C - avoids overvoltage damage to 24V-tolerant PD controllers where conventional TVS would exceed 35V. |
Use Scenario: Shielding HS2950P or similar load switches from EOS events on input rails in remote meters, robotics, and IoT gateways. IC Role / Device Role / Timing Role: High-current shunt protector that limits voltage across load switch FET drain-source during surge, preventing avalanche failure. Use Value: Clamps to ≤28V at full 40A, staying well below typical 30–40V VDSS ratings of integrated load switches - extends reliability without derating. |
| Notebook/Tablet DC Input Protection | Storage Device Power Rail Protection |
Use Scenario: Safeguarding 19–22V adapter input stages in thin-client notebooks and tablets against user-handling ESD and AC-line coupled surges. IC Role / Device Role / Timing Role: Single-component solution replacing multi-diode TVS arrays, placed adjacent to barrel jack or USB-C port. Use Value: 175pF capacitance avoids filtering or resonance issues on 22V rail; 1.6mm × 1.6mm footprint enables placement in tight edge-mount layouts. |
Use Scenario: Protecting 22V auxiliary rails in NVMe SSD enclosures and enterprise storage backplanes exposed to system-level ESD and hot-swap transients. IC Role / Device Role / Timing Role: Standalone EOS suppressor on 22V VCC_AUX or VDD_22V supply, upstream of PMIC or LDO regulators. Use Value: 600nA max leakage at 22V ensures no measurable impact on standby current; −40°C to +125°C operation supports extended thermal cycling in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Same die, identical electrical specs and DFN-6 package - direct replacement with identical marking (T22XX) and reel packaging. | No functional difference; used interchangeably in all SMDA05.TBT-designated BOMs. | Select when sourcing from Semtech-authorized channels requiring exact part number traceability. |
| uClamp2411ZA | 24V working voltage, lower 24A IPP rating, higher 30V clamping, smaller 0.65mm × 0.65mm DFN-2 package. | Better suited for CC/SBU lines in USB-C; insufficient for 40A VBUS protection due to lower surge rating and higher clamping. | Choose only for low-capacitance, low-current signal-line protection - not a functional substitute for SMDA05.TBT on power rails. |
Compared with TDS2211P, SMDA05.TBT offers identical protection performance and form factor but may differ in date-code marking or tape-and-reel logistics; uClamp2411ZA provides lower-footprint signal-line protection but lacks the 40A surge capability and stable 28V clamping needed for 22V power rail applications.
Availability
SMDA05.TBT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and notebook/tablet 22V DC power rails requiring stable component supply, long-term lifecycle support, and guaranteed surge performance across temperature extremes.
Supply support for SMDA05.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 connectivity.
SMDA05.TBT belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace conventional TVS diodes in high-reliability 22V power rail protection where flat clamping, thermal stability, and space-constrained layouts are critical.
FAQ
What is the maximum continuous operating voltage for SMDA05.TBT?
The SMDA05.TBT has a reverse stand-off voltage (VRWM) of 22V, meaning it reliably blocks up to 22V DC without significant leakage current. Its breakdown voltage starts at 25V (min), ensuring safe margin for 22V nominal systems. This makes SMDA05.TBT suitable for USB PD 20V–22V bus protection and industrial 24V-derived rails.
Does SMDA05.TBT require external bias or control signals to operate?
No, SMDA05.TBT is a fully passive, self-triggering device. It contains an integrated precision trigger circuit and surge-rated FET - no external power, enable pins, or configuration are needed. The device activates automatically when transient voltage exceeds its internal breakdown threshold, making SMDA05.TBT ideal for simple, robust front-end protection.
How does SMDA05.TBT's clamping voltage compare to standard TVS diodes at high temperature?
Unlike standard TVS diodes whose clamping voltage rises significantly with temperature, SMDA05.TBT maintains 27.5–28V clamping from −40°C to +125°C. At 125°C, conventional 22V TVS devices often exceed 35V clamping - risking damage to 24V-tolerant ICs - whereas SMDA05.TBT's FET-based architecture ensures consistent protection across full industrial temperature range.
Can SMDA05.TBT be used on high-speed data lines like USB SuperSpeed or PCIe?
No, SMDA05.TBT is not intended for high-speed data 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). SMDA05.TBT should only be applied to VBUS, CC, or auxiliary power paths - never signal pairs.
What PCB layout practices maximize SMDA05.TBT's surge performance?
To achieve rated 40A performance, connect all three IN pins (4,5,6) via a single short, wide trace to the protected line, and tie all three GND pins (1,2,3) directly to a solid ground plane using multiple vias. Place SMDA05.TBT within 3mm of the connector. Avoid stubs or splits - any impedance discontinuity degrades clamping response during fast ESD events.
SMDA05.TBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- SMDA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- 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:
- 400pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
SMDA05.TBT FAQ
1.How can I place an order for SMDA05.TBT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA05.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 SMDA05.TBT reliable?
The price and inventory of SMDA05.TBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA05.TBT is usually 5 days.
3.What payment methods are accepted for SMDA05.TBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA05.TBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA05.TBT?
SMDA05.TBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA05.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 SMDA05.TBT?
For technical support, including SMDA05.TBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA05.TBT requirements.
6.How does Aetrix verify that SMDA05.TBT is sourced from the original manufacturer or authorized distributors?
All SMDA05.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 SMDA05.TBT meets industry standards.
7.What is the process for return or replacement of SMDA05.TBT?
All SMDA05.TBT units undergo pre-shipment inspection (PSI). If there is an issue with SMDA05.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 SMDA05.TBT part is unused and in its original packaging.
Return procedure for SMDA05.TBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA05.TBT Tags
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