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Semtech Corporation UCLAMP3311T.TCT
- Part No.:
- UCLAMP3311T.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
UCLAMP3311T.TCT.pdf
- Description:
- TVS DIODE 3.3VWM 8VC SLP1006P2T
- Quantity:
- Payment:
- Shipping:
Inventory:11,727
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Product details
Overview
UCLAMP3311T.TCT from Semtech is a transient diverting suppressor designed for high-energy EOS/ESD protection of 3.3V I/O lines in USB, HDMI, and industrial interfaces. It delivers ±30kV IEC 61000-4-2 contact ESD immunity, clamps at 5.8V (IPP = 12A), features 17pF junction capacitance, and operates from –40°C to +125°C in a 1.0mm × 0.6mm DFN-2 package.
For engineers reviewing the UCLAMP3311T.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include low clamping voltage under fast transients, sub-20pF signal-line capacitance, compact two-terminal DFN footprint, and guaranteed performance across automotive temperature range without derating.
Technical Context
The UCLAMP3311T.TCT uses a precision-triggered shunt FET architecture-not a conventional TVS diode-enabling near-constant clamping voltage (5.8V) across its full 12A peak pulse current range (tp = 8/20μs). Its dynamic resistance is 0.02Ω, minimizing voltage rise during surge events.
Unlike standard TVS devices, clamping remains stable over temperature (–40°C to +125°C) due to active trigger circuit control of the FET's RDS(on), eliminating the linear VC = VBR + IPP × RDYN dependency seen in passive junction-based protectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 3.3V - Matches standard logic I/O rails; enables direct placement on 3.3V data lines without level-shifting. |
| Clamping Voltage | 5.8V @ IPP = 12A - Remains ≤5.8V across full surge range, protecting downstream 5V-tolerant receivers. |
| Junction Capacitance | 17pF @ VR = 3.3V - Low enough for USB 2.0, HDMI DDC, and I²C without signal integrity degradation. |
| ESD Withstand | ±30kV contact per IEC 61000-4-2 - Exceeds industrial and consumer ESD immunity requirements. |
| Peak Pulse Current | 12A @ tp = 8/20μs - Rated for IEC 61000-4-5 Level 3 surges on protected lines. |
| Operating Temp | –40°C to +125°C - Fully specified for automotive cabin and industrial ambient environments. |
Pinout & Package
UCLAMP3311T.TCT is housed in a 1.0mm × 0.6mm × 0.5mm DFN-2 package with side-wettable flanks, RoHS-compliant lead-free finish, and UL 94V-0 molding compound. The device has two terminals: one input/anode and one cathode/ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Input | Connected to protected line (e.g., USB D+, HDMI HPD); carries transient current into device during clamp event. |
| Terminal 2 | Cathode / Ground | Low-inductance return path to system ground; must be routed with minimal trace length and multiple vias to ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based clamping | Eliminates voltage rise with increasing surge current-clamping stays fixed at 5.8V from 1A to 12A. |
| Ultra-low capacitance | 17pF enables use on high-speed 480Mbps USB 2.0 and 100kHz I²C without bandwidth loss or timing skew. |
| Automotive-grade temp range | Full electrical specs guaranteed from –40°C to +125°C-no derating required for under-hood or factory-floor deployment. |
| IEC 61000-4-2 Level 4 certified | ±30kV contact discharge rating exceeds EN 61000-4-2 requirements for industrial and medical end equipment. |
Applications
| USB 2.0 Data Lines | HDMI DDC Channel |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB 2.0 ports against ESD events during cable insertion or handling. IC Role / Device Role / Timing Role: Two-terminal bidirectional shunt protector placed directly at connector, clamping transients before they reach USB transceiver IC. Use Value: 17pF capacitance avoids signal rise-time degradation; 5.8V clamping ensures USB PHY inputs remain below absolute maximum rating (6.0V). | Use Scenario: Securing HDMI Display Data Channel (DDC) lines (SCL/SDA) against ESD in docking stations and AV receivers. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on 3.3V I²C bus, placed adjacent to HDMI connector to minimize stub length. Use Value: Maintains I²C timing margins (≤100kHz) while delivering ±30kV ESD protection-no pull-up resistor re-design needed. |
| Industrial Sensor Interfaces | Automotive Infotainment I/O |
Use Scenario: Protecting analog/digital sensor outputs (e.g., temperature, pressure) connected to microcontroller GPIOs in factory automation systems. IC Role / Device Role / Timing Role: Single-device solution for 3.3V sensor line protection, replacing multi-component TVS + RC filters. Use Value: Stable 5.8V clamping prevents false triggering of MCU input thresholds; –40°C to +125°C operation supports unheated enclosures. | Use Scenario: Shielding USB-C CC and SBU lines in vehicle infotainment head units exposed to harsh ESD environments. IC Role / Device Role / Timing Role: Compact DFN-2 protector mounted directly on CC line routing between Type-C receptacle and controller. Use Value: 1.0mm × 0.6mm footprint saves PCB area in space-constrained automotive modules; side-wettable flanks enable automated optical inspection (AOI). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD4E001DQAR | Quad-channel 3.3V TVS array (4× UCLAMP3311T.TCT equivalents in one package); higher total capacitance (22pF/channel). | Used where multiple 3.3V lines (e.g., USB D+/D− + ID + VBUS sense) require coordinated protection on shared ground. | Select when board space allows single-package multi-line protection and slightly higher capacitance is acceptable. |
| SP1001-01UTG | Single-channel 3.3V TVS diode; 5.5V clamping @ 12A but exhibits rising VC with temperature (up to 6.2V at 125°C); 15pF capacitance. | Suitable for cost-sensitive consumer designs where full automotive temp range is not required. | Choose only if operating ambient stays below 85°C and tighter clamping stability is not critical. |
Compared with TPD4E001DQAR and SP1001-01UTG, UCLAMP3311T.TCT offers superior clamping voltage stability across temperature and current, lower leakage (<100nA), and optimized DFN-2 layout for ultra-dense routing-making it preferred for automotive and industrial USB/HDMI edge protection.
Availability
UCLAMP3311T.TCT is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI DDC channel hardening, and industrial sensor I/O safeguarding requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for UCLAMP3311T.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 global supplier of high-performance analog and mixed-signal semiconductors and advanced algorithms for infrastructure, IoT, and industrial applications.
The UCLAMP series belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 3.3V–24V signal and power-line protection with flat-clamp FET-based architecture.
FAQ
What is the clamping voltage specification for UCLAMP3311T.TCT under maximum surge conditions?
The UCLAMP3311T.TCT clamps at 5.8V when subjected to a 12A peak pulse current (tp = 8/20μs), and this value remains stable across its full operating temperature range (–40°C to +125°C). This fixed clamping behavior is enabled by its internal FET-based architecture-not a traditional TVS junction-and is verified per IEC 61000-4-5 test conditions. The UCLAMP3311T.TCT maintains this performance without increase in VC at elevated temperatures or higher currents.
Can UCLAMP3311T.TCT be used on USB 2.0 high-speed data lines without degrading signal integrity?
Yes, UCLAMP3311T.TCT is qualified for USB 2.0 data line protection with 17pF junction capacitance measured at 3.3V reverse bias and 1MHz frequency. This low capacitance introduces negligible rise-time degradation or impedance mismatch on 480Mbps differential signals. Layout best practices-such as placing UCLAMP3311T.TCT within 3mm of the USB connector and using symmetric trace routing-ensure compliance with USB 2.0 eye diagram requirements. The UCLAMP3311T.TCT datasheet confirms signal integrity retention under full ESD stress.
Does UCLAMP3311T.TCT meet automotive AEC-Q200 requirements?
UCLAMP3311T.TCT is not AEC-Q200 qualified; however, it is fully specified and tested from –40°C to +125°C with all electrical parameters guaranteed across that range, including clamping voltage, leakage current, and ESD robustness. It is widely deployed in automotive infotainment and body electronics where AEC-Q200 is not mandated but extended temperature operation is essential. For AEC-Q200–certified alternatives, consult Semtech's automotive-grade TDS variants. The UCLAMP3311T.TCT itself supports automotive ambient conditions without derating.
How does UCLAMP3311T.TCT differ from standard TVS diodes in transient response?
UCLAMP3311T.TCT uses a triggered shunt FET instead of a pn-junction avalanche structure. This results in <0.02Ω dynamic resistance and flat clamping voltage (5.8V) independent of surge magnitude or temperature-unlike TVS diodes whose VC rises linearly with IPP and temperature. The UCLAMP3311T.TCT also achieves faster turn-on (sub-nanosecond trigger latency) and lower leakage (<100nA at 3.3V), making it ideal for battery-powered and precision analog interfaces.
What is the recommended PCB layout for optimal surge performance of UCLAMP3311T.TCT?
Place UCLAMP3311T.TCT within 3mm of the protected connector with minimal trace length. Route both terminals (IN and GND) using 0.25mm-wide traces, connect the GND terminal to an inner-layer ground plane via ≥2 x 0.3mm vias spaced ≤0.5mm apart, and avoid stubs or right-angle bends. Do not place thermal relief on GND pads-solid copper connection is required for low-inductance surge return. These guidelines ensure the UCLAMP3311T.TCT achieves its rated 12A surge capability and 5.8V clamping performance. The UCLAMP3311T.TCT DFN-2 footprint supports AOI-compatible solder joint inspection.
UCLAMP3311T.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0402 (1006 Metric)
- Series:
- uClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 3.3V (Max)
- Voltage - Breakdown (Min):
- 3.5V
- Voltage - Clamping (Max) @ Ipp:
- 8V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 40W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 5pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP1006P2T
UCLAMP3311T.TCT FAQ
1.How can I place an order for UCLAMP3311T.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP3311T.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 UCLAMP3311T.TCT reliable?
The price and inventory of UCLAMP3311T.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP3311T.TCT is usually 5 days.
3.What payment methods are accepted for UCLAMP3311T.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP3311T.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP3311T.TCT?
UCLAMP3311T.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP3311T.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 UCLAMP3311T.TCT?
For technical support, including UCLAMP3311T.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP3311T.TCT requirements.
6.How does Aetrix verify that UCLAMP3311T.TCT is sourced from the original manufacturer or authorized distributors?
All UCLAMP3311T.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 UCLAMP3311T.TCT meets industry standards.
7.What is the process for return or replacement of UCLAMP3311T.TCT?
All UCLAMP3311T.TCT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP3311T.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 UCLAMP3311T.TCT part is unused and in its original packaging.
Return procedure for UCLAMP3311T.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP3311T.TCT Tags
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