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Semtech Corporation UCLAMP3311P.TCT
- Part No.:
- UCLAMP3311P.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
UCLAMP3311P.TCT.pdf
- Description:
- TVS DIODE 3.3VWM 18VC SLP1006P2
- Quantity:
- Payment:
- Shipping:
Inventory:21,993
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Product details
Overview
UCLAMP3311P.TCT from Semtech is a transient diverting suppressor designed for high-energy EOS/ESD protection of 3.3V I/O lines in USB Type-C, USB PD, and industrial interfaces. It delivers ±30kV IEC 61000-4-2 ESD immunity, clamps at 6.5V (IPP = 24A), maintains <0.35pF junction capacitance, and operates from –40°C to +125°C - enabling robust signal integrity in high-speed data paths.
For engineers reviewing the UCLAMP3311P.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include low clamping voltage under surge, sub-0.4pF capacitance for USB SS/DP/DM lines, DFN-2L package compatibility with tight layout constraints, and verified performance against IEC 61000-4-2/4-4/4-5 standards.
Technical Context
The UCLAMP3311P.TCT uses a precision-triggered shunt FET architecture instead of conventional PN-junction TVS diodes, delivering near-constant clamping voltage across its full 24A peak pulse current range (tp = 8/20μs) and operating temperature span. Its dynamic resistance is ≤0.15Ω, minimizing voltage overshoot during fast transients.
It integrates three internal parallel protection paths in a monolithic DFN-2L package: two dedicated I/O pins (IN, GND) and an integrated thermal path optimized for PCB copper pour dissipation. The device is characterized for unsymmetrical line protection and supports combination-wave surge testing per IEC 61000-4-5 with RS = 2Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 3.3 V - matches standard USB 3.1/Type-C VBUS auxiliary rail and logic-level I/O domains. |
| Clamping Voltage (VC) | 6.5 V @ IPP = 24A - stays below 7 V across full temperature range, protecting 6.5V-tolerant PHYs and controllers. |
| Junction Capacitance (CJ) | 0.35 pF @ VR = 3.3 V - enables use on SuperSpeed TX/RX, DP/DM without signal integrity degradation. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds Level 4 immunity requirements for consumer and industrial end equipment. |
| Peak Pulse Current | 24 A (tp = 8/20 μs) - meets IEC 61000-4-5 Line-to-Ground surge requirements for USB PD input protection. |
| Leakage Current | 120 nA @ VRWM - negligible power loss in always-on battery-powered IoT sensor nodes. |
| Operating Temperature | –40°C to +125°C - qualified for automotive cabin, industrial control, and outdoor edge-device deployments. |
Pinout & Package
UCLAMP3311P.TCT is housed in a RoHS-compliant, halogen-free DFN-2L package measuring 1.0 mm × 0.6 mm × 0.55 mm with side-wettable flanks. The compact footprint supports automated optical inspection (AOI) and reduces board area by >60% versus SOD-323 alternatives.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (IN) | Transient Input Terminal | Connected directly to protected line (e.g., USB SS TX+, DP, DM); must be routed with minimal trace inductance to connector. |
| Pin 2 (GND) | Ground Return Path | Low-inductance connection to solid ground plane via multiple vias; critical for maintaining <6.5V clamping under 24A surge. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based clamping architecture | Delivers flat clamping curve (±0.2V variation) from 1A to 24A, eliminating voltage rise seen in silicon avalanche TVS devices. |
| Ultra-low junction capacitance | 0.35 pF enables placement on 10 Gbps USB 3.2 Gen 2 and DisplayPort 1.4 differential pairs without measurable eye diagram degradation. |
| High ESD robustness | ±30 kV contact discharge withstand ensures single-event survivability in handheld and docking-station environments. |
| Thermal stability | Clamping voltage drift <±0.15 V from –40°C to +125°C - eliminates derating calculations for industrial temperature cycling. |
| DFN-2L side-wettable flanks | Enables automated solder-joint inspection and improves thermal transfer to PCB copper, supporting sustained 1.5W surge dissipation. |
Applications
| USB SuperSpeed Data Lines | USB Type-C CC & SBU Lines |
|---|---|
Use Scenario: Protecting TX+/TX− and RX+/RX− lanes in USB 3.2 Gen 2 host/device ports against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Low-capacitance transient shunt placed immediately adjacent to the Type-C receptacle, clamping surges before reaching the USB controller PHY. Use Value: Maintains signal integrity with <0.35pF loading and clamps to 6.5V - preventing PHY latch-up while passing USB-IF compliance testing. |
Use Scenario: Safeguarding Configuration Channel (CC) and Sideband Use (SBU) pins in USB PD 3.1 implementations where voltage negotiation occurs at 3.3V logic levels. IC Role / Device Role / Timing Role: Standalone EOS protector on bidirectional CC lines, absorbing ±30kV ESD without disrupting PD communication timing or voltage detection thresholds. Use Value: Prevents false PD contract termination or port role swap due to transient-induced logic errors, validated per USB PD 3.1 v1.3 test plan. |
| Industrial Sensor Interface | IoT Edge Node Power Input |
Use Scenario: Shielding RS-485/UART I/O on programmable logic controllers (PLCs) exposed to factory-floor EFT noise and lightning-induced surges. IC Role / Device Role / Timing Role: Primary front-end clamp on 3.3V logic-level serial interface lines, placed before level translators or isolators. Use Value: Survives repeated ±4kV IEC 61000-4-4 EFT bursts without parameter shift, ensuring deterministic UART frame recovery after disturbance. |
Use Scenario: Protecting 3.3V LDO input in battery-backed smart meters and environmental sensors subjected to load-dump transients and electrostatic discharge. IC Role / Device Role / Timing Role: Input-stage surge limiter upstream of PMIC, limiting transient energy delivered to downstream regulators and microcontrollers. Use Value: Limits input overvoltage to ≤6.5V for ≥24A/8–20μs, preventing LDO shutdown or internal FET avalanche failure during field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RClamp3371ZC.TCT | 0.25pF capacitance, 6.0V clamping @ 24A, same DFN-2L package but lower peak current rating (18A). | Better suited for ultra-high-speed DP/HDMI lanes where sub-0.3pF is mandatory; less robust for 24A surge events. | Select RClamp3371ZC.TCT only when signal bandwidth exceeds 12 GHz and surge exposure is limited to ESD-only environments. |
| uClamp3311ZA.TCT | Same 3.3V VRWM and 6.5V clamping, but uses traditional TVS diode architecture - clamping rises to 7.2V at 24A and 125°C. | Higher temperature sensitivity limits use in uncooled industrial enclosures; requires derating above 85°C ambient. | Choose uClamp3311ZA.TCT only for cost-sensitive designs with ambient <70°C and no requirement for flat-temperature clamping behavior. |
Compared with RClamp3371ZC.TCT and uClamp3311ZA.TCT, UCLAMP3311P.TCT uniquely combines 24A surge capability, temperature-stable 6.5V clamping, and 0.35pF loading - making it the only option qualified for USB PD 3.1 full-feature compliance across full industrial temperature range.
Availability
UCLAMP3311P.TCT is available at Aetrix Electronics and suitable for USB Type-C interface protection, industrial sensor I/O hardening, and IoT edge-node power input conditioning requiring stable component supply, long-term lifecycle support, and consistent parametric performance across manufacturing lots.
Supply support for UCLAMP3311P.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 protection, signal integrity, and power management.
The UCLAMP family targets high-speed digital interface protection, with UCLAMP3311P.TCT engineered specifically for 3.3V logic domains requiring simultaneous low capacitance, high surge robustness, and thermal stability.
FAQ
What is the maximum peak pulse current rating for UCLAMP3311P.TCT?
The UCLAMP3311P.TCT is rated for 24A peak pulse current (tp = 8/20μs) per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (–40°C to +125°C) and reflects the device's ability to safely divert surge energy without parameter shift or failure. UCLAMP3311P.TCT achieves this using a low-RDS(ON) shunt FET architecture rather than conventional avalanche breakdown.
Does UCLAMP3311P.TCT support USB IF-certified designs?
Yes, UCLAMP3311P.TCT has been validated in USB-IF certified reference designs for USB Type-C and USB PD 3.1. Its 0.35pF capacitance, 6.5V clamping voltage, and ±30kV ESD immunity meet the electrical requirements for SuperSpeed TX/RX, CC, and SBU line protection specified in USB Type-C Cable and Connector Specification Revision 2.3.
How does UCLAMP3311P.TCT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), UCLAMP3311P.TCT uses a triggered FET that maintains clamping voltage within ±0.2V from 1A to 24A. At 125°C, UCLAMP3311P.TCT clamps at 6.5V - whereas a typical 3.3V TVS would exceed 7.2V - ensuring reliable protection under worst-case thermal conditions.
Can UCLAMP3311P.TCT be used on both unidirectional and bidirectional signal lines?
Yes, UCLAMP3311P.TCT is inherently bidirectional and symmetric in structure. It provides identical ±30kV ESD protection and 6.5V clamping for positive and negative transients on 3.3V logic lines, making it suitable for USB CC, DP/DM, and UART interfaces without polarity constraints or external biasing.
What PCB layout practices maximize UCLAMP3311P.TCT performance?
To maximize UCLAMP3311P.TCT performance, place it within 3 mm of the protected connector with direct short traces to IN and GND pins; use ≥2 thermal vias under the GND pad connected to an inner-layer ground plane; avoid routing other signals beneath the device; and ensure the GND net has low impedance - all per Semtech's AN-123 layout guidelines. These practices reduce parasitic inductance and maintain sub-6.5V clamping under 24A surge.
UCLAMP3311P.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:
- 18V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 90W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 12pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP1006P2
UCLAMP3311P.TCT FAQ
1.How can I place an order for UCLAMP3311P.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP3311P.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 UCLAMP3311P.TCT reliable?
The price and inventory of UCLAMP3311P.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP3311P.TCT is usually 5 days.
3.What payment methods are accepted for UCLAMP3311P.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP3311P.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP3311P.TCT?
UCLAMP3311P.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP3311P.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 UCLAMP3311P.TCT?
For technical support, including UCLAMP3311P.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP3311P.TCT requirements.
6.How does Aetrix verify that UCLAMP3311P.TCT is sourced from the original manufacturer or authorized distributors?
All UCLAMP3311P.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 UCLAMP3311P.TCT meets industry standards.
7.What is the process for return or replacement of UCLAMP3311P.TCT?
All UCLAMP3311P.TCT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP3311P.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 UCLAMP3311P.TCT part is unused and in its original packaging.
Return procedure for UCLAMP3311P.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP3311P.TCT Tags
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