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Semtech Corporation UCLAMP3311Z.TFT
- Part No.:
- UCLAMP3311Z.TFT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0201 (0603 Metric)
- Datasheet:
-
UCLAMP3311Z.TFT.pdf
- Description:
- TVS DIODE 3.3V 7.5V SLP0603P2X3A
- Quantity:
- Payment:
- Shipping:
Inventory:9,459
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Product details
Overview
UCLAMP3311Z.TFT from Semtech is a single-line transient voltage suppression (TVS) diode designed for board-level ESD protection of 3.3V digital interfaces. It delivers ±14kV contact / ±16kV air ESD immunity per IEC 61000-4-2, features 6pF typical junction capacitance, 0.21Ω dynamic resistance, and operates in an ultra-small SLP0603P2X3A (0.62 × 0.32 × 0.25 mm) package-ideal for space-constrained mobile audio ports and side keys.
For engineers reviewing the UCLAMP3311Z.TFT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage at 4A (7.5V), reverse leakage <1nA at 3.3V, punch-through voltage range (3.65–4.4V), and compatibility with high-speed data lines requiring sub-10pF loading.
Technical Context
The UCLAMP3311Z.TFT employs Semtech's proprietary EPD (Enhanced Protection Diode) silicon-avalanche process to achieve low leakage (<1nA) and low capacitance (6pF) while maintaining robust ESD withstand capability. Its snap-back behavior-evidenced by VSB = 2.8V at 50mA-enables low clamping during transients without latch-up risk.
This device functions as a bidirectional, two-terminal TVS diode with true 3.3V working voltage (VRWM = 3.3V), enabling precise protection alignment with 3.3V I/O rails. It supports repetitive ESD strikes (>1000 at Level 4) and handles 4A peak pulse current (8/20µs) with 30W non-repetitive peak power rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 3.3V VRWM - matches standard 3.3V logic rail; prevents false triggering during normal operation |
| ESD Withstand | ±14kV contact / ±16kV air - exceeds IEC 61000-4-2 Level 4 for handheld product certification |
| Clamping Voltage | 7.5V at 4A (8/20µs) - limits transient overvoltage to safe levels for downstream 3.3V ICs |
| Junction Capacitance | 6pF typical at 0V - enables use on USB 2.0, audio, and keypad lines without signal integrity degradation |
| Dynamic Resistance | 0.21Ω typical - ensures rapid voltage collapse during ESD events, minimizing energy delivered to protected circuit |
| Leakage Current | <1nA at 3.3V - eliminates measurable DC loading on battery-powered sensor or audio bias networks |
| Punch-Through Voltage | 3.65–4.4V - defines reliable turn-on threshold above operating voltage but below IC absolute maximum ratings |
Pinout & Package
UCLAMP3311Z.TFT is housed in a 2-pin SLP0603P2X3A package (0.62 × 0.32 × 0.25 mm), RoHS-compliant with NiAu lead finish and tape-and-reel packaging (15,000 units/reel). The device has no polarity marking; both terminals are functionally symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Interconnects to protected line; no polarity assignment required due to symmetrical avalanche structure |
| Terminal 2 | Anode/Cathode (bidirectional) | Connects to system ground or common reference; completes ESD current path during transient events |
Key Features
| Feature | Design Value |
|---|---|
| EPD Process Technology | Delivers 3.3V VRWM with <1nA leakage-superior to conventional PN-junction TVS diodes in low-power portable designs |
| Snap-Back Triggering | VSB = 2.8V enables stable low-voltage clamping after breakdown, preventing thermal runaway under repeated stress |
| Ultra-Low Capacitance | 6pF typical allows integration on high-speed digital lines (e.g., headset mic/audio sense) without bandwidth loss |
| 0201 Footprint Compatibility | SLP0603P2X3A outline fits standard 0201 land patterns-enabling drop-in replacement in existing layouts |
| High ESD Strike Endurance | Withstands >1000 IEC 61000-4-2 Level 4 discharges-ensures long-term reliability in field-deployed consumer devices |
Applications
| Smartphone Side Keys | USB 2.0 Data Lines |
|---|---|
Use Scenario: Mechanical side keys on smartphones exposed to frequent human-hand ESD events during pocket carry and handling. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between key switch and baseband processor GPIO input. Use Value: Prevents ESD-induced latch-up or permanent damage to 3.3V-tolerant GPIOs while adding only 6pF loading-no signal delay or bounce distortion. | Use Scenario: D+ and D− lines in compact USB 2.0 peripheral ports (e.g., OTG adapters, docking cradles). IC Role / Device Role / Timing Role: Line-to-ground TVS protection on each differential pair, mounted adjacent to connector. Use Value: Maintains USB 2.0 eye diagram integrity (≤10pF limit) and clamps transients to <7.5V-within USB PHY tolerance margins. |
| Tablet Audio Jacks | Digital Keypads |
Use Scenario: 3.5mm TRRS audio jacks in tablets subject to plug insertion/removal ESD and cable-borne surges. IC Role / Device Role / Timing Role: Per-line protection on microphone bias, left/right audio, and ground-sense paths. Use Value: Enables full 4-pole jack protection using discrete UCLAMP3311Z.TFT units-no compromise on size or clamping performance vs. arrays. | Use Scenario: Membrane or capacitive keypads in industrial handhelds where ESD exposure occurs across multiple tactile points. IC Role / Device Role / Timing Role: Point-of-entry protection on each row/column trace before MCU port expander or GPIO controller. Use Value: Eliminates need for larger arrays; 0.62mm length allows placement directly at keypad connector-minimizing unprotected trace length. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD1E01B04DPYR | 4.5V VRWM, 5.5pF typical, ±12kV contact ESD rating | Lower clamping (5.5V @ 1A) but reduced ESD margin; optimized for lower-voltage I/O like 1.8V/2.5V | Select when protecting mixed-voltage interfaces where tighter clamping at lower currents is prioritized over max ESD level |
| SMA6J33A | 33V VBR, 100pF typical, 600W peak power, DO-214AC package | Designed for board-level surge (IEC 61000-4-5), not high-frequency ESD; unsuitable for data lines | Use only for primary-level AC/DC input protection-not as a replacement for UCLAMP3311Z.TFT in signal-line applications |
Compared with TPD1E01B04DPYR and SMA6J33A, UCLAMP3311Z.TFT uniquely balances 3.3V rail alignment, ultra-low capacitance, and certified ±16kV air ESD performance in a 0201-compatible footprint-making it the preferred choice for high-density portable data-line protection where signal fidelity and miniaturization are critical.
Availability
UCLAMP3311Z.TFT is available at Aetrix Electronics and suitable for cellular handsets, tablet PC audio ports, and portable instrumentation requiring stable component supply and consistent RoHS-compliant sourcing.
Supply support for UCLAMP3311Z.TFT 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 connectivity.
The µClamp® product line was developed specifically for board-level ESD protection of high-speed, low-voltage digital interfaces-prioritizing minimal capacitance, fast response, and repeatable clamping in ultra-compact packages.
FAQ
What is the maximum clamping voltage of UCLAMP3311Z.TFT under IEC 61000-4-2 ESD conditions?
The UCLAMP3311Z.TFT achieves 6V clamping voltage at 4A under TLP test conditions (tp = 0.2/100ns), and 8.5V at 16A. For standardized IEC 61000-4-2 8kV contact discharge, measured clamping is ≤6V. This ensures protected 3.3V ICs remain within safe operating limits during real-world ESD events. All values are confirmed in the Rev 8.0 datasheet, page 3.
Can UCLAMP3311Z.TFT be used on 1.8V or 2.5V I/O lines?
UCLAMP3311Z.TFT is specified for 3.3V working voltage (VRWM = 3.3V); using it on 1.8V or 2.5V lines risks premature conduction and excessive leakage. For those rails, Semtech recommends UCLAMP1811Z.TFT (1.8V) or UCLAMP2511Z.TFT (2.5V). UCLAMP3311Z.TFT must only be applied where the protected line operates continuously at or near 3.3V.
Does UCLAMP3311Z.TFT require orientation during PCB placement?
No-UCLAMP3311Z.TFT is a bidirectional TVS diode with symmetrical terminal construction. Both pins serve identical roles; there is no anode/cathode distinction or polarity marking. Orientation does not affect ESD protection performance, simplifying automated placement and reducing assembly error risk.
What is the thermal derating behavior of UCLAMP3311Z.TFT above 25°C ambient?
The UCLAMP3311Z.TFT's peak pulse power rating decreases linearly above 25°C, with a thermal derating factor of 0.33W/°C beyond TJ = 25°C. At 85°C junction temperature, its 30W (8/20µs) rating reduces to approximately 10W. Designers must ensure PCB copper area and layout allow adequate heat dissipation during repetitive surge events.
Is UCLAMP3311Z.TFT compatible with lead-free reflow profiles per JEDEC J-STD-020?
Yes-UCLAMP3311Z.TFT is qualified for lead-free reflow per JEDEC J-STD-020, including peak temperatures up to 260°C (MSL1). Its NiAu lead finish and SLP0603P2X3A package support standard Type 4 solder paste and recommended reflow profiles. Assembly guidelines, including stencil design and pad layout, are detailed in the Rev 8.0 datasheet, page 4.
UCLAMP3311Z.TFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0201 (0603 Metric)
- Series:
- uClamp®, Z-Pak™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 3.3V (Max)
- Voltage - Breakdown (Min):
- 3.65V
- 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.TFT FAQ
1.How can I place an order for UCLAMP3311Z.TFT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP3311Z.TFT 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.TFT reliable?
The price and inventory of UCLAMP3311Z.TFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP3311Z.TFT is usually 5 days.
3.What payment methods are accepted for UCLAMP3311Z.TFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP3311Z.TFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP3311Z.TFT?
UCLAMP3311Z.TFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP3311Z.TFT 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.TFT?
For technical support, including UCLAMP3311Z.TFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP3311Z.TFT requirements.
6.How does Aetrix verify that UCLAMP3311Z.TFT is sourced from the original manufacturer or authorized distributors?
All UCLAMP3311Z.TFT 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.TFT meets industry standards.
7.What is the process for return or replacement of UCLAMP3311Z.TFT?
All UCLAMP3311Z.TFT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP3311Z.TFT, 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.TFT part is unused and in its original packaging.
Return procedure for UCLAMP3311Z.TFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP3311Z.TFT Tags
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