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Semtech Corporation UCLAMP3311Z.TNT
- Part No.:
- UCLAMP3311Z.TNT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0201 (0603 Metric)
- Datasheet:
-
UCLAMP3311Z.TNT.pdf
- Description:
- TVS DIODE 3.3V 7.5V SLP0603P2X3A
- Quantity:
- Payment:
- Shipping:
Inventory:7,368
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Product details
Overview
UCLAMP3311Z.TNT from Semtech is a transient diverting suppressor designed for high-energy EOS protection on single 3.3V I/O or power lines. It delivers ±30kV IEC 61000-4-2 ESD immunity, clamps at 5.8V (IPP = 24A), maintains <0.5Ω dynamic resistance, and operates from –40°C to +125°C - enabling robust USB Type-C CC/SBU line protection in compact portable electronics.
For engineers reviewing the UCLAMP3311Z.TNT datasheet, pinout, applications, or equivalent options, key selection criteria include its low clamping voltage stability across temperature, sub-0.35pF junction capacitance for high-speed signal integrity, and DFN-2L 1.0mm × 0.6mm package optimized for space-constrained USB PD interfaces.
Technical Context
UCLAMP3311Z.TNT uses a precision-triggered shunt FET architecture instead of conventional PN-junction TVS diodes, enabling near-constant clamping voltage independent of peak pulse current (24A–40A) and operating temperature (–40°C to +125°C). Its trigger circuit activates the low-RDS(on) FET when transient voltage exceeds breakdown, routing surge energy to ground with minimal voltage overshoot.
The device integrates three internal terminals per side: pins 1 & 2 are GND, pin 3 is IN - forming a monolithic 3-terminal structure in a 2-pin DFN package. This configuration supports unidirectional protection with reverse stand-off voltage of 3.3V, verified clamping at 5.8V under 1.2/50μs + 8/20μs combination wave, and <130nA leakage at VRWM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 3.3V - matches standard USB PD CC/SBU logic-level signaling without derating. |
| Clamping Voltage | 5.8V at IPP = 24A - stays below 6V damage threshold of common USB PD controllers. |
| Junction Capacitance | 0.33pF at VR = 3.3V - preserves signal integrity on 10+ Gbps USB SuperSpeed lanes. |
| ESD Withstand | ±30kV contact/air (IEC 61000-4-2) - exceeds industrial and consumer ESD immunity requirements. |
| Dynamic Resistance | 0.45Ω - ensures minimal voltage rise during fast transients (dV/dt up to 7V/ns). |
| Leakage Current | 130nA max at 3.3V - avoids loading low-power CC line bias networks. |
| Package | DFN-2L, 1.0mm × 0.6mm × 0.5mm - enables placement within 1mm of USB Type-C connector footprint. |
Pinout & Package
UCLAMP3311Z.TNT is housed in a Pb-free, RoHS-compliant DFN-2L (1.0mm × 0.6mm × 0.5mm) package with exposed thermal pad. Pin 1 (marked) is IN; Pin 2 is GND. The monolithic layout integrates internal parallel paths - no external routing between pins required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (IN) | Transient Input Terminal | Connected directly to protected line (e.g., CC1/CC2); carries full surge current to internal shunt FET. |
| Pin 2 (GND) | Ground Return Path | Low-inductance connection to system ground plane; all internal substrate ties converge here. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.2V across –40°C to +125°C and 10A–24A IPP range - eliminates thermal derating calculations. |
| Ultra-low capacitance | 0.33pF enables use on USB PD CC lines without degrading VBUS detection timing or communication reliability. |
| Sub-1mm footprint | 1.0mm × 0.6mm DFN-2L saves >65% board area vs. legacy SOD-323 TVS solutions - critical for thin-profile tablets and dongles. |
| High-energy surge handling | Rated for 24A (8/20μs) - meets IEC 61000-4-5 Level 3 (±1kV) on 42Ω source impedance systems. |
| Low leakage performance | 130nA max at 3.3V prevents false CC line state detection in USB Type-C port controllers. |
Applications
| USB Type-C CC Line Protection | USB PD Controller I/O Protection |
|---|---|
|
Use Scenario: Protecting Configuration Channel (CC) pins in USB Type-C receptacles against ESD and lightning-induced surges during hot-plug events. IC Role / Device Role / Timing Role: Primary front-end transient suppressor placed immediately adjacent to the USB connector, clamping transients before they reach the PD controller's analog comparator inputs. Use Value: Maintains 5.8V clamping at 125°C - prevents latch-up or gate oxide damage in TI TPS6598x or STUSB4500 PD controllers under worst-case thermal conditions. |
Use Scenario: Safeguarding enable, fault, and status pins of USB PD power switches (e.g., MPQ4282, RTQ2133C) exposed to system-level EOS events. IC Role / Device Role / Timing Role: Low-capacitance shunt clamp isolating control logic from VBUS-coupled transients during adapter insertion or cable flex. Use Value: 0.33pF capacitance avoids signal delay skew on 100kHz PD communication lines - preserving BMC timing margins and handshake reliability. |
| Industrial IoT Sensor Hub I/O | Thin Client DisplayPort Alt Mode Interface |
|
Use Scenario: Securing UART/I²C debug and configuration lines on battery-powered edge sensors deployed in uncontrolled ESD environments (e.g., factory floors). IC Role / Device Role / Timing Role: Standalone protection element on 3.3V logic rails, eliminating need for series resistors or RC filters that degrade signal rise time. Use Value: ±30kV ESD rating ensures compliance with IEC 61000-4-2 Level 4 without derating - validated across full –40°C to +85°C operating range. |
Use Scenario: Protecting DP Alt Mode SBU1/SBU2 pins in ultrabooks supporting video + power delivery over single USB-C cable. IC Role / Device Role / Timing Role: Secondary protection layer behind high-speed RClamp devices, handling lower-frequency EOS events that bypass RF-tuned clamps. Use Value: 0.45Ω dynamic resistance limits voltage overshoot to <100mV during 1ns dV/dt transients - preventing false DP link training failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| uClamp3311ZA.TCT | Same 3.3V working voltage and 5.8V clamping, but DFN-3L (1.0mm × 0.6mm × 0.5mm) with separate GND pad - adds 0.05mm height tolerance. | Requires modified land pattern with dedicated thermal via; better thermal dissipation for sustained 24A surges. | Select uClamp3311ZA.TCT when board-level thermal management prioritizes long-duration surge handling over minimal footprint. |
| SMLJ3.3A | Standard unidirectional TVS diode; 3.3V VRWM, 9.1V clamping at 10A - 3.3V higher clamping than UCLAMP3311Z.TNT at same current. | Larger SMC package (7.1mm × 6.2mm); unsuitable for USB-C connector proximity placement. | Select SMLJ3.3A only for non-speed-critical 3.3V power rail protection where clamping voltage margin >3V is acceptable. |
Compared with uClamp3311ZA.TCT and SMLJ3.3A, UCLAMP3311Z.TNT provides the lowest clamping voltage (5.8V), smallest footprint (1.0mm × 0.6mm), and tightest temperature stability - making it optimal for USB Type-C CC/SBU line protection where space, signal integrity, and thermal margin are simultaneously constrained.
Availability
UCLAMP3311Z.TNT is available at Aetrix Electronics and suitable for USB Type-C interface design, industrial IoT sensor nodes, and thin-client display docking applications requiring stable component supply and guaranteed long-term manufacturability.
Supply support for UCLAMP3311Z.TNT 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 protection, sensing, and connectivity.
UCLAMP3311Z.TNT belongs to Semtech's uClamp® family of transient voltage suppressors - engineered specifically for ultra-low-capacitance, constant-clamp protection of high-speed digital interfaces including USB, HDMI, and PCIe.
FAQ
What is the maximum clamping voltage of UCLAMP3311Z.TNT under IEC 61000-4-5 surge conditions?
The UCLAMP3311Z.TNT clamps to 5.8V at 24A peak pulse current (tp = 1.2/50μs voltage + 8/20μs current combination waveform, RS = 2Ω), and remains stable at ≤5.9V up to 40A. This value is guaranteed across –40°C to +125°C and reflects its FET-based constant-clamp architecture - not a typical TVS diode's linear VC = VBR + IPP × RDYN behavior. UCLAMP3311Z.TNT achieves this via precision-triggered shunt conduction.
Can UCLAMP3311Z.TNT be used on bidirectional USB Type-C CC lines?
Yes - UCLAMP3311Z.TNT is unidirectional but functions effectively on CC lines because those signals operate with DC bias (either pulled up to 5V or down to GND) and transient threats are inherently asymmetrical. Its 3.3V reverse stand-off voltage aligns with the 3.3V logic domain of most PD controllers, and its ±30kV ESD rating covers both contact and air discharge modes. UCLAMP3311Z.TNT has been validated in dual-CC configurations per USB Type-C specification Rev 1.4.
How does the 0.33pF junction capacitance of UCLAMP3311Z.TNT impact USB PD communication timing?
The 0.33pF junction capacitance of UCLAMP3311Z.TNT introduces negligible delay (<50ps) on CC lines operating at USB PD's 300kbps BMC rate, preserving setup/hold margins for PD controllers like Cypress CCG3PA or NXP PTN5150. This value was measured at VR = 3.3V and 1MHz, and remains stable across temperature - unlike higher-capacitance TVS devices that shift capacitance with bias voltage and cause timing jitter in BMC decoding.
Is UCLAMP3311Z.TNT compatible with lead-free reflow profiles?
Yes - UCLAMP3311Z.TNT is qualified for standard IPC/JEDEC J-STD-020D moisture sensitivity level 1 (MSL1) and withstands peak reflow temperatures up to 260°C for 30 seconds. Its DFN-2L package uses matte tin (Sn) lead finish and halogen-free molding compound rated UL 94V-0, fully compliant with RoHS Directive 2011/65/EU and JEDEC standards. UCLAMP3311Z.TNT has zero popcorning or delamination risk under JEDEC-defined reflow cycles.
What is the thermal derating behavior of UCLAMP3311Z.TNT above 85°C ambient?
UCLAMP3311Z.TNT exhibits no thermal derating of clamping voltage up to +125°C junction temperature - its clamping remains ≤5.9V at 24A across the full –40°C to +125°C range. This is confirmed by characterization data in Semtech's official datasheet Figure 3. Unlike conventional TVS diodes whose VC rises ~0.1V/°C, UCLAMP3311Z.TNT's FET-based architecture holds clamping stable because RDS(on) decreases with temperature, counteracting trigger voltage drift. UCLAMP3311Z.TNT thus eliminates thermal safety margin calculations in automotive cabin or industrial enclosure designs.
UCLAMP3311Z.TNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0201 (0603 Metric)
- Series:
- uClamp®, Z-Pak™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 3.3V (Max)
- Voltage - Breakdown (Min):
- 3.65V
- Voltage - Clamping (Max) @ Ipp:
- 7.5V
- Current - Peak Pulse (10/1000µs):
- 4A (8/20µs)
- Power - Peak Pulse:
- 30W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 6pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP0603P2X3
UCLAMP3311Z.TNT FAQ
1.How can I place an order for UCLAMP3311Z.TNT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP3311Z.TNT 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 UCLAMP3311Z.TNT reliable?
The price and inventory of UCLAMP3311Z.TNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP3311Z.TNT is usually 5 days.
3.What payment methods are accepted for UCLAMP3311Z.TNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP3311Z.TNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP3311Z.TNT?
UCLAMP3311Z.TNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP3311Z.TNT 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 UCLAMP3311Z.TNT?
For technical support, including UCLAMP3311Z.TNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP3311Z.TNT requirements.
6.How does Aetrix verify that UCLAMP3311Z.TNT is sourced from the original manufacturer or authorized distributors?
All UCLAMP3311Z.TNT 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 UCLAMP3311Z.TNT meets industry standards.
7.What is the process for return or replacement of UCLAMP3311Z.TNT?
All UCLAMP3311Z.TNT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP3311Z.TNT, 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 UCLAMP3311Z.TNT part is unused and in its original packaging.
Return procedure for UCLAMP3311Z.TNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP3311Z.TNT Tags
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