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Semtech Corporation SMDA15.T
- Part No.:
- SMDA15.T
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA15.T.pdf
- Description:
- TVS DIODE 15VWM 30VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:9,322
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Product details
Overview
SMDA15.T from Semtech is a transient diverting suppressor designed for high-energy EOS 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 where stable clamping across temperature and current is critical.
For engineers reviewing the SMDA15.T datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world USB PD and load switch protection use cases, and two validated alternative parts with documented functional trade-offs.
Technical Context
The SMDA15.T uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events and rapidly shunts transients to ground. Unlike conventional TVS diodes, its clamping voltage remains nearly constant-27.5–28V-from 24A to 40A peak pulse current due to decreasing RDS(on) under surge conditions.
It operates across –40°C to +125°C with stable 22V reverse stand-off voltage and <600nA leakage at VRWM, while maintaining 175pF junction capacitance at 22V/1MHz-critical for minimizing signal distortion on protected lines such as USB PD VBUS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage it can protect without leakage or degradation |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures downstream ICs like USB PD controllers remain below damage thresholds during lightning surges |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds USB IF and industrial ESD test mandates |
| Dynamic Resistance | 20mΩ - enables low-voltage clamping stability across full surge current range and temperature |
| Junction Capacitance | 175pF at 22V/1MHz - low enough to avoid signal integrity issues on 20V power rails, unlike higher-capacitance TVS arrays |
| Operating Temperature | –40°C to +125°C - supports deployment in automotive-grade and industrial ambient environments |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, RoHS-compliant, UL 94V-0 molding compound, lead-free finish, tape-and-reel packaging (3,000 units/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground connection points - all three must be soldered to maximize surge current path and minimize parasitic inductance |
| 4, 5, 6 | IN | Protected line input - connected directly to VBUS or power rail; all three pins conduct surge current in parallel to achieve 40A rating |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient shunting | Replaces traditional TVS diodes with active switching - delivers flat clamping vs. current/temperature instead of linear VC = VBR + IPP×RDYN rise |
| Stable clamping across temperature | 27.5–28V clamping maintained from –40°C to +125°C - eliminates derating uncertainty in thermal-critical applications |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - minimizes IR drop during surge, preserving clamping accuracy |
| High-energy surge handling | 1120W peak pulse power (8/20μs) - supports repeated exposure to industrial-level lightning transients without degradation |
| Low leakage & capacitance | <600nA IR at 22V and 175pF CJ - avoids power loss and signal loading on 22V power rails and high-speed interfaces |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBUS lines in USB Type-C ports supporting up to 20V/5A PD profiles against ESD, lightning, and cable discharge events. IC Role / Device Role / Timing Role: Primary EOS shunt device placed at connector entry point to clamp transients before reaching PD controller and power switches. Use Value: Maintains 27.5–28V clamping across –40°C to +125°C - prevents false overvoltage shutdown and ensures robust compliance with USB PD 3.1 stress testing. |
Use Scenario: Safeguarding enable and input pins of industrial-grade load switches (e.g., HS2950P) exposed to field wiring surges in remote meters and robotics. IC Role / Device Role / Timing Role: Front-end transient suppressor that limits voltage seen by internal FET gate oxide and drain-source junction during 1.2/50μs surges. Use Value: Clamps below 28V at 40A - keeps load switch within safe operating area (SOA) and avoids latch-up or permanent gate damage. |
| IoT Device Power Rail Protection | Storage Device VCC Line Protection |
Use Scenario: Securing 22V auxiliary power rails in battery-backed IoT gateways subjected to EFT bursts and electrostatic discharge in uncontrolled environments. IC Role / Device Role / Timing Role: Single-component solution replacing multi-diode TVS arrays - handles ±4kV EFT (IEC 61000-4-4) and ±30kV ESD without performance drift. Use Value: 20mΩ RDYN and stable 27.5V clamping ensure consistent protection margin across product lifetime and temperature cycling. |
Use Scenario: Protecting 22V supply inputs of NVMe SSD modules and enterprise storage controllers against hot-plug transients and backplane coupling. IC Role / Device Role / Timing Role: High-reliability EOS guard for power sequencing circuits - absorbs energy without degrading or requiring derating at elevated board temperatures. Use Value: 1120W peak power rating and –55°C to +150°C junction storage range support extended MTBF in 24/7 data center deployments. |
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 FET-based architecture, identical 22V VRWM, 40A IPP, and DFN-6 package - direct functional match to SMDA15.T per Semtech documentation | Validated in USB Type-C PD reference designs and load switch protection schematics | Preferred when sourcing from Semtech's official channel; identical marking (T22) and reel specs confirm cross-compatibility |
| SP1003-220K | TVS diode array with 22V standoff, 30A IPP (8/20μs), but higher 35V clamping at 30A and temperature-dependent VC rise | Limited to lower-energy applications where 28V clamping margin is not required | Consider only if cost sensitivity outweighs clamping stability needs - lacks FET-based flat VC response and thermal resilience |
Compared with TDS2211P and SP1003-220K, the SMDA15.T delivers identical clamping performance and package compatibility to TDS2211P while offering superior thermal stability over SP1003-220K - making it optimal for USB PD and industrial power rail protection where voltage margin is constrained.
Availability
SMDA15.T is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT device power rail protection requiring stable component supply, long-term lifecycle assurance, and traceable RoHS-compliant sourcing.
Supply support for SMDA15.T 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 SMDA15.T belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace conventional TVS diodes in high-reliability power rail protection where flat clamping voltage and thermal stability are mandatory design requirements.
FAQ
What is the exact reverse stand-off voltage of the SMDA15.T?
The SMDA15.T has a guaranteed reverse stand-off voltage (VRWM) of 22V, meaning it remains non-conductive and exhibits <600nA leakage up to this DC or continuous AC voltage level - critical for ensuring no power loss on protected 22V rails during normal operation.
Does the SMDA15.T meet IEC 61000-4-5 surge immunity standards?
Yes, the SMDA15.T is rated for 40A peak pulse current under the IEC 61000-4-5 8/20μs waveform and withstands ±1kV combination wave (1.2/50μs voltage, 8/20μs current, RS = 42Ω), satisfying Level 4 industrial surge immunity requirements for equipment connected to mains or long cables.
How does the SMDA15.T 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 SMDA15.T uses a triggered FET to maintain near-constant 27.5–28V clamping from 24A to 40A and across –40°C to +125°C - eliminating thermal derating and improving protection predictability.
What is the recommended PCB layout for optimal performance of the SMDA15.T?
Place the SMDA15.T as close as possible to the protected connector; connect all three IN pins (4,5,6) via a single low-inductance trace to the protected line, and tie all three GND pins (1,2,3) directly to a solid ground plane using multiple vias - this minimizes parasitic inductance and ensures full 40A surge capability.
Is the SMDA15.T compatible with automated optical inspection (AOI) and reflow processes?
Yes, the SMDA15.T uses a standard DFN-6 package with 0.55mm height, lead-free finish, and RoHS/WEEE compliance - fully compatible with industry-standard reflow profiles (J-STD-020) and AOI systems; its laser-marked "T22" code enables automated traceability in high-volume manufacturing.
SMDA15.T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- SMDA
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V (Max)
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 30V
- Current - Peak Pulse (10/1000µs):
- 10A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 100pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
SMDA15.T FAQ
1.How can I place an order for SMDA15.T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA15.T 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 SMDA15.T reliable?
The price and inventory of SMDA15.T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA15.T is usually 5 days.
3.What payment methods are accepted for SMDA15.T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA15.T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA15.T?
SMDA15.T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA15.T 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 SMDA15.T?
For technical support, including SMDA15.T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA15.T requirements.
6.How does Aetrix verify that SMDA15.T is sourced from the original manufacturer or authorized distributors?
All SMDA15.T 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 SMDA15.T meets industry standards.
7.What is the process for return or replacement of SMDA15.T?
All SMDA15.T units undergo pre-shipment inspection (PSI). If there is an issue with SMDA15.T, 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 SMDA15.T part is unused and in its original packaging.
Return procedure for SMDA15.T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA15.T Tags
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