My Inquiry
My Account
Semtech Corporation SMS15C.TCT
- Part No.:
- SMS15C.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SOT-23-6
- Datasheet:
-
SMS15C.TCT.pdf
- Description:
- TVS DIODE 15VWM 29VC SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:5,697
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMS15C.TCT 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), and stable 27.5–28V clamping across temperature and current range. It protects USB Type-C power delivery buses, load switch inputs, and industrial I/O interfaces using solid-state FET-based shunt architecture.
For engineers reviewing the SMS15C.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability over temperature, low dynamic resistance (20 mΩ), junction capacitance (175 pF at 22V), DFN 1.6×1.6mm package constraints, and compatibility with ±1kV IEC 61000-4-5 surge testing on unsymmetrical lines.
Technical Context
The SMS15C.TCT uses a precision-triggered surge-rated FET as its primary protection element, activated by a voltage-controlled trigger circuit when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant-27.5–28V at both 24A and 40A-due to decreasing RDS(on) under surge conditions.
It operates across –40°C to +125°C, maintains <600 nA reverse leakage at 22V, and delivers 1120W peak pulse power (8/20μs). Its functional architecture separates input (pins 4–6) and ground (pins 1–3) terminals to minimize parasitic inductance, requiring all six pins to be connected for full 40A rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22 V - Maximum continuous DC operating voltage before clamping activation. |
| Clamping Voltage | 27.5–28 V at 40A (8/20μs + 1.2/50μs combo waveform, RS = 2Ω) - Ensures protected ICs (e.g., USB PD controllers) remain below damage threshold. |
| Peak Pulse Current | 40 A (8/20μs) - Supports industrial ±1kV surge compliance (IEC 61000-4-5, RS = 42Ω, CS = 0.5μF). |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - Eliminates need for secondary ESD stages in USB Type-C and IoT interfaces. |
| Dynamic Resistance | 20 mΩ (measured 1–40A, 8/20μs) - Enables flat clamping curve and minimizes voltage overshoot during fast transients. |
| Junction Capacitance | 175 pF at 22V, 1 MHz - Compatible with 22V bus protection without signal integrity degradation on moderate-speed lines. |
Pinout & Package
Package: DFN 1.6 mm × 1.6 mm × 0.55 mm, 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 maximize current handling and minimize inductance. |
| Pins 4, 5, 6 | IN | Protected line input (e.g., VBUS, load switch input); parallel connection ensures uniform current sharing and full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping voltage | 27.5–28 V across 24–40A and –40°C to +125°C - Prevents thermal runaway and enables predictable system-level surge margin. |
| FET-based shunt architecture | Surge-rated MOSFET + precision trigger circuit - Delivers lower clamping than TVS diodes and eliminates temperature-dependent VC drift. |
| Low dynamic resistance | 20 mΩ - Reduces IR drop during surge, maintaining tighter voltage control at high dI/dt events. |
| High EFT immunity | ±4 kV per IEC 61000-4-4 (5/50 ns, 100 kHz & 5 kHz) - Protects against repetitive burst noise in industrial control and metering environments. |
Applications
| USB Type-C Power Delivery Bus Protection | Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V VBUS lines in USB-C ports supporting up to 100W PD, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed adjacent to connector, clamping transients before they reach PD controller or load switch. Use Value: Maintains 27.5–28V clamping at 40A and 125°C-well below typical 30V PD controller absolute maximum ratings-enabling single-stage robust protection. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and IoT edge nodes. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage stress on internal FET gate oxide and drain-source junction during surge events. Use Value: Prevents latch-up or permanent failure of load switches rated ≤30V by holding clamping voltage stable even at elevated ambient temperatures. |
| Industrial I/O Line Protection | Notebook/Tablet DC Power Input Protection |
Use Scenario: Shielding 24V-rated sensor or actuator interface lines in PLCs, factory automation, and process control equipment. IC Role / Device Role / Timing Role: Solid-state alternative to MOV+TVS stacks, providing faster response and no wear-out mechanism. Use Value: Delivers 40A surge capability with 1120W peak power handling while occupying only 2.56 mm² board area-reducing BOM count and layout complexity. |
Use Scenario: Securing 20V DC input rails in ultraportable notebooks and tablets where space, thermal headroom, and reliability are critical. IC Role / Device Role / Timing Role: High-energy transient suppressor placed at barrel jack or USB-C receptacle, upstream of PMIC and battery charging circuitry. Use Value: Enables compliance with IEC 61000-4-5 Level 3 (±1kV) without derating at high temperature-critical for fanless thermal designs. |
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 | Same silicon die, identical electrical specs, DFN 1.6×1.6mm package, tape-and-reel packaging (3,000 pcs/reel). | Direct replacement with same footprint, thermal profile, and surge performance; differs only in part marking and reel quantity. | Select TDS2211P.C for volume production requiring standard Semtech reel packaging. |
| uClamp2411ZA.TCT | 24V working voltage, ±30kV ESD, but lower 24A IPP rating and higher 32V clamping at 24A; SOD-323 package (smaller, 2-pin). | Better suited for CC/SBU lines in USB-C; not rated for 40A or 22V bus-level protection due to lower surge capacity and less stable clamping. | Choose uClamp2411ZA.TCT only for low-capacitance, low-current auxiliary lines-not as a substitute for SMS15C.TCT on main power rails. |
Compared with TDS2211P.C, SMS15C.TCT shares identical electrical behavior and package but may differ in date-code marking or internal lot traceability; compared with uClamp2411ZA.TCT, SMS15C.TCT provides 67% higher peak current rating and 4.5V lower clamping-making it suitable for primary 22V rail protection where energy handling is critical.
Availability
SMS15C.TCT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and notebook/tablet DC power protection requiring stable component supply, long-term lifecycle support, and consistent surge performance across temperature extremes.
Supply support for SMS15C.TCT 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 analog and mixed-signal ICs for precision sensing, protection, and signal integrity.
The Transient Diverting Suppressor (TDS) product line was developed to replace traditional TVS diodes in high-reliability 20–30V power rail protection, delivering flat clamping, temperature-stable performance, and superior surge endurance in compact DFN packages.
FAQ
What is the maximum continuous operating voltage for SMS15C.TCT?
The SMS15C.TCT has a reverse stand-off voltage (VRWM) of 22 V, meaning it can continuously withstand up to 22 V DC on its input pins (4–6) relative to ground (1–3) without entering clamping mode. This makes it suitable for 20V USB PD and 24V industrial bus applications where nominal voltage stays within this limit.
Does SMS15C.TCT require external bias or control signals to operate?
No, SMS15C.TCT 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 internal breakdown threshold (~25–27.9 V). No external power, enable pin, or configuration is needed-SMS15C.TCT functions immediately upon installation.
Can SMS15C.TCT be used on high-speed data lines like USB SuperSpeed or PCIe?
No, SMS15C.TCT is not intended for high-speed data lines. With 175 pF junction capacitance at 22V, it would severely degrade signal integrity on >100 Mbps interfaces. It is designed exclusively for power rails and moderate-speed I/O lines (e.g., VBUS, load switch inputs, industrial sensors). For USB SS or DP/DM lines, use low-capacitance devices like RClamp3371ZC instead of SMS15C.TCT.
How does SMS15C.TCT achieve stable clamping voltage across temperature?
SMS15C.TCT achieves stable clamping by using a MOSFET-based shunt architecture rather than a pn-junction TVS. When triggered, the FET's RDS(on) drops to ~20 mΩ, making clamping voltage dependent primarily on the fixed trigger circuit breakdown (~25–27.9 V), not on temperature-sensitive junction characteristics. As a result, SMS15C.TCT maintains 27.5–28 V clamping from –40°C to +125°C.
What PCB layout practices are required to achieve full 40A surge rating for SMS15C.TCT?
To achieve the full 40A rating, all three GND pins (1–3) and all three IN pins (4–6) must be connected-no floating pins. Use wide, short traces to minimize inductance; place SMS15C.TCT within 5 mm of the protected connector; connect GND pins to a solid ground plane using ≥3 vias each; and avoid routing sensitive traces near SMS15C.TCT's high-current path. These practices ensure SMS15C.TCT delivers its rated performance per IEC 61000-4-5.
SMS15C.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- SOT-23-6
- Series:
- SMS
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 5
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V (Max)
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 29V
- Current - Peak Pulse (10/1000µs):
- 12A (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:
- SOT-23-6
SMS15C.TCT FAQ
1.How can I place an order for SMS15C.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMS15C.TCT 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 SMS15C.TCT reliable?
The price and inventory of SMS15C.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMS15C.TCT is usually 5 days.
3.What payment methods are accepted for SMS15C.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMS15C.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMS15C.TCT?
SMS15C.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMS15C.TCT 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 SMS15C.TCT?
For technical support, including SMS15C.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMS15C.TCT requirements.
6.How does Aetrix verify that SMS15C.TCT is sourced from the original manufacturer or authorized distributors?
All SMS15C.TCT 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 SMS15C.TCT meets industry standards.
7.What is the process for return or replacement of SMS15C.TCT?
All SMS15C.TCT units undergo pre-shipment inspection (PSI). If there is an issue with SMS15C.TCT, 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 SMS15C.TCT part is unused and in its original packaging.
Return procedure for SMS15C.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMS15C.TCT Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
