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Semtech Corporation SMDA15C.TBT
- Part No.:
- SMDA15C.TBT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA15C.TBT.pdf
- Description:
- TVS DIODE 15VWM 30VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,817
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Product details
Overview
SMDA15C.TBT from Semtech is a transient diverting suppressor designed for high-energy EOS protection on 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 175pF junction capacitance - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the SMDA15C.TBT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance (20mΩ), DFN 1.6×1.6mm package constraints, and compatibility with 22V bus architectures requiring robust surge immunity per IEC 61000-4-5.
Technical Context
SMDA15C.TBT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that initiates shunting when transient voltage exceeds breakdown threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant across 24–40A peak pulse range due to decreasing RDS(on) under surge conditions.
The device operates over –40°C to +125°C, maintains stable 27.5–28V clamping up to 125°C, and delivers 1120W peak pulse power handling. Its 6-pin DFN layout separates three IN terminals (pins 4–6) and three GND terminals (pins 1–3), requiring all six pins to be connected for full 40A rating and minimal parasitic inductance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage before leakage or conduction onset. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave) - ensures protected ICs (e.g., USB PD controllers) remain below damage thresholds during surge events. |
| Peak Pulse Current | 40A (tp = 8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds standard USB interface ESD requirements without derating. |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with 22V power rail protection where signal integrity is secondary to surge robustness. |
| Dynamic Resistance | 20mΩ (measured 1–40A, 8/20μs) - enables flat clamping response and minimizes voltage overshoot during fast-rising transients. |
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 |
|---|---|---|
| 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 connection to protected bus (e.g., VBUS in USB Type-C); parallel routing required for uniform current sharing and thermal distribution. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across 24–40A and –40°C to +125°C - eliminates thermal derating and simplifies worst-case margin analysis. |
| FET-based shunt topology | Replaces pn-junction TVS with <0.1Ω RDS(on) - reduces energy dissipation in silicon junction and improves reliability under repeated surges. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against burst noise in industrial control and metering environments. |
| Low-leakage operation | 600nA max reverse leakage at 22V - avoids quiescent power loss in always-on 22V systems like remote IoT sensors. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Front-End Protection |
|---|---|
Use Scenario: Protecting VBUS line in USB Type-C receptacles supporting up to 20V/5A PD profiles against lightning-induced surges and connector ESD. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector entry point to clamp overvoltage before reaching PD controller and load switch. Use Value: Maintains 27.5–28V clamping across temperature and current - prevents false OVP trips and enables use of lower-voltage-rated downstream FETs. |
Use Scenario: Shielding HS2950P or similar load switches from EOS events in industrial meters, robotics, and remote monitoring equipment. IC Role / Device Role / Timing Role: Primary surge shunt element absorbing 40A transients before they stress internal switch FET gate oxide or drain-source junction. Use Value: Limits voltage across load switch input to ≤28V - avoids permanent damage to 30V-rated internal MOSFETs during 1kV/42Ω surge tests. |
| IoT Device Power Rail Protection | Storage Device 22V Bus Protection |
Use Scenario: Securing 22V auxiliary rails in battery-backed smart sensors exposed to field ESD and induced surges in unshielded enclosures. IC Role / Device Role / Timing Role: Standalone EOS protector on main power input, operating in parallel with low-quiescent LDOs or buck converters. Use Value: 175pF capacitance imposes no signal integrity penalty on DC rails - unlike low-capacitance TVS, enabling direct placement without RC filtering. |
Use Scenario: Safeguarding 22V supply inputs in NVMe SSD modules and enterprise storage backplanes subjected to hot-plug transients and system-level surges. IC Role / Device Role / Timing Role: High-energy clamping device placed upstream of PMICs and flash controller power domains. Use Value: 1120W peak pulse power rating supports multi-event surge endurance - critical for storage systems with extended field lifetimes. |
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 1.6×1.6mm package, identical pinout and marking - direct Semtech-recommended replacement with tape-and-reel packaging. | Same USB PD, load switch, and industrial 22V rail use cases; validated in Semtech reference designs (e.g., Figure 4 & 5). | Select TDS2211P.C when sourcing from authorized Semtech distributors with full traceability and standard reel quantities (3,000 pcs/reel). |
| uClamp2411ZA | 24V working voltage, ±30kV ESD, but rated only for 12A IPP (8/20μs) and higher 33V clamping - lacks constant-clamp FET architecture. | Suitable for CC/SBU lines in USB Type-C, not for 22V VBUS or load switch inputs due to lower surge rating and voltage headroom. | Choose uClamp2411ZA only for auxiliary signal-line protection where 22V bus-level surge immunity is not required. |
Compared with TDS2211P.C, SMDA15C.TBT shares identical performance and footprint but may differ in date-code marking or reel packaging; versus uClamp2411ZA, SMDA15C.TBT provides 3.3× higher peak current capability and 5V lower clamping - making it the sole viable option for 22V power rail EOS hardening.
Availability
SMDA15C.TBT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and 22V IoT power rail protection requiring stable component supply across long-lifecycle embedded programs.
Supply support for SMDA15C.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.
SMDA15C.TBT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace traditional TVS diodes in high-voltage, high-surge industrial and USB PD applications with superior clamping stability and thermal resilience.
FAQ
What is the maximum continuous operating voltage for SMDA15C.TBT?
SMDA15C.TBT has a reverse stand-off voltage (VRWM) of 22V, meaning it reliably blocks up to 22V DC or RMS AC under normal operation without significant leakage. This makes SMDA15C.TBT suitable for 20V USB PD VBUS lines and other 22V-rated power rails where sustained overvoltage must be avoided.
Does SMDA15C.TBT require external bias or control signals to operate?
No, SMDA15C.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. SMDA15C.TBT activates automatically when transient voltage exceeds its breakdown threshold, making it drop-in compatible with existing PCB layouts.
How does SMDA15C.TBT's clamping behavior compare to standard TVS diodes?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (VC = VBR + IPP × RDYN), SMDA15C.TBT maintains near-constant clamping (27.5–28V) from 24A to 40A due to its FET-based shunt architecture. This eliminates thermal derating concerns and ensures predictable protection across ambient temperatures from –40°C to +125°C.
Can SMDA15C.TBT be used on high-speed data lines like USB SuperSpeed or PCIe?
No, SMDA15C.TBT is not intended for high-speed data lines. Its 175pF junction capacitance would severely degrade signal integrity on differential pairs operating above ~100MHz. For USB SS, DP/DM, or PCIe lanes, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF); SMDA15C.TBT is optimized exclusively for 22V power and robust I/O line protection.
What PCB layout practices are critical for achieving SMDA15C.TBT's rated 40A surge performance?
To achieve full 40A rating, all three IN pins (4–6) and all three GND pins (1–3) must be connected with short, wide copper traces - no stubs or vias between pins. Place SMDA15C.TBT within 5mm of the protected connector, use ≥4 thermal vias under the exposed pad (if present), and avoid routing sensitive traces near its input path to prevent coupling during ESD events.
SMDA15C.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):
- 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:
- 75pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
SMDA15C.TBT FAQ
1.How can I place an order for SMDA15C.TBT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA15C.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 SMDA15C.TBT reliable?
The price and inventory of SMDA15C.TBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA15C.TBT is usually 5 days.
3.What payment methods are accepted for SMDA15C.TBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA15C.TBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA15C.TBT?
SMDA15C.TBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA15C.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 SMDA15C.TBT?
For technical support, including SMDA15C.TBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA15C.TBT requirements.
6.How does Aetrix verify that SMDA15C.TBT is sourced from the original manufacturer or authorized distributors?
All SMDA15C.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 SMDA15C.TBT meets industry standards.
7.What is the process for return or replacement of SMDA15C.TBT?
All SMDA15C.TBT units undergo pre-shipment inspection (PSI). If there is an issue with SMDA15C.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 SMDA15C.TBT part is unused and in its original packaging.
Return procedure for SMDA15C.TBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA15C.TBT Tags
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