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Semtech Corporation UCLAMP1211P.TFT
- Part No.:
- UCLAMP1211P.TFT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
UCLAMP1211P.TFT.pdf
- Description:
- UCLAMP 12V 1-LINE ESD PROT
- Quantity:
- Payment:
- Shipping:
Inventory:12,150
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Product details
Overview
UCLAMP1211P.TFT from Semtech is a transient diverting suppressor designed for high-energy EOS/ESD protection of single 12V-rated I/O or power lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and 175pF junction capacitance - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the UCLAMP1211P.TFT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance (20mΩ), DFN-6 package footprint compatibility, and compliance with IEC 61000-4-2/4-4/4-5 standards for robust system-level surge resilience.
Technical Context
The UCLAMP1211P.TFT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C, maintains stable 20mΩ dynamic resistance (measured 1–40A, 8/20μs), and delivers 1120W peak pulse power handling. Its 175pF capacitance at 22V/1MHz and <600nA reverse leakage at VRWM support high-speed interface protection without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 12V - defines maximum continuous DC bus voltage the device safely blocks during normal operation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave, RS = 2Ω) - ensures protected ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surges. |
| Peak Pulse Current | 40A (tp = 8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 12V systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD immunity mandates without derating. |
| Junction Capacitance | 175pF at VR = 12V, f = 1MHz - low enough to avoid signal distortion on medium-speed buses like USB 2.0 or industrial control lines. |
| Dynamic Resistance | 20mΩ (1–40A, 8/20μs) - enables flat clamping response and minimizes voltage overshoot during fast-rising transients. |
Pinout & Package
UCLAMP1211P.TFT is housed in a RoHS-compliant, halogen-free DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with UL 94V-0 molding compound. The package features three dedicated ground terminals and three parallel input terminals to maximize surge current sharing and minimize parasitic inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Low-inductance ground return path; all three pins must be connected to solid ground plane via multiple vias for full 40A rating. |
| 4, 5, 6 | IN | Parallel-connected surge input node; ties directly to protected line (e.g., VBUS in USB-C); enables current sharing across terminals to sustain high IPP. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across 24–40A surge range - eliminates need for over-spec'ing IPP to meet voltage limits. |
| Temperature-stable protection | Clamping holds 27.5–28V from –40°C to +125°C - removes thermal derating uncertainty in industrial or automotive under-hood environments. |
| Ultra-low dynamic resistance | 20mΩ enables sub-1V overshoot margin during 40A transients - critical for safeguarding 12V logic and power management ICs. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) supports repeated exposure to IEC 61000-4-5 Level 4 surges without parametric shift or failure. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Front-End Protection |
|---|---|
Use Scenario: Protecting 12V VBUS lines in USB-C receptacles supporting up to 60W PD, exposed to ESD, lightning-induced surges, and hot-plug transients. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed immediately after the connector, clamping transients before they reach the PD controller and load switch. Use Value: Maintains 27.5–28V clamping across temperature and current - prevents false OVP trips and ensures PD negotiation integrity under real-world surge stress. |
Use Scenario: Safeguarding the input of 12V-rated industrial load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment. IC Role / Device Role / Timing Role: First-line transient diverter that limits voltage seen by the load switch's internal FET gate oxide and drain-source junction. Use Value: Prevents permanent damage to load switch silicon during 40A surges - extends field reliability and avoids costly board-level failures in unattended deployments. |
| IoT Edge Node Power Bus Protection | 12V Industrial Control Signal Line Protection |
Use Scenario: Securing 12V auxiliary power rails in battery-backed IoT gateways and edge sensors subjected to EFT bursts and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance, high-IPP protector for always-on power inputs where standby current and surge resilience are both critical. Use Value: Delivers <600nA leakage at 12V - preserves battery life while sustaining ±4kV EFT immunity per IEC 61000-4-4. |
Use Scenario: Shielding 12V analog or digital control lines (e.g., enable, fault feedback) in PLC I/O modules against induced surges from nearby motor switching. IC Role / Device Role / Timing Role: Point-of-entry transient clamp on isolated control signals routed across long cables in noisy factory environments. Use Value: 175pF capacitance avoids signal edge degradation on 1–10MHz control waveforms - maintains timing accuracy and noise margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS1211P | Same FET-based TDS architecture, identical 12V VRWM and 27.5–28V clamping, but rated for 24A IPP (vs. 40A). | Limited to lower-energy surge environments (e.g., consumer USB ports); insufficient for industrial IEC 61000-4-5 Level 4 compliance. | Select when cost sensitivity outweighs peak surge headroom and layout space allows tighter thermal margins. |
| SM712.TCT | Traditional bipolar TVS array; 12V VRWM, 30V clamping at 10A, higher RDYN (~1Ω), clamping rises with current/temperature. | Suitable only for basic ESD + low-energy EFT; cannot maintain safe clamping at 40A or elevated ambient temperatures. | Choose only for legacy designs requiring pin-compatible replacement where surge energy is strictly bounded and thermal design is conservative. |
Compared with TDS1211P and SM712.TCT, UCLAMP1211P.TFT delivers superior surge robustness through flat clamping and 40A rating - enabling smaller safety margins, simplified thermal design, and guaranteed protection across full industrial temperature and current ranges.
Availability
UCLAMP1211P.TFT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, IoT edge node power buses, and 12V control signal lines requiring stable component supply with full surge certification traceability.
Supply support for UCLAMP1211P.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 semiconductor company specializing in high-performance analog and mixed-signal semiconductors for precision sensing, protection, and signal integrity applications.
The UCLAMP series targets high-reliability transient suppression in next-generation power delivery and industrial connectivity systems - emphasizing clamping stability, low capacitance, and compact DFN packaging for space-constrained designs.
FAQ
What is the maximum continuous operating voltage for UCLAMP1211P.TFT?
The UCLAMP1211P.TFT has a reverse stand-off voltage (VRWM) of 12V, meaning it reliably blocks voltages up to 12V in normal operation without conduction. This value is confirmed in the Electrical Characteristics table of the official Semtech datasheet, with no derating required at 25°C or across its full –40°C to +125°C operating range.
Does UCLAMP1211P.TFT meet IEC 61000-4-5 surge immunity standards?
Yes, UCLAMP1211P.TFT is rated for 40A peak pulse current (tp = 8/20μs), which satisfies IEC 61000-4-5 Level 4 (±1kV, RS = 42Ω, CS = 0.5μF) for 12V systems. Its 27.5–28V clamping voltage at 40A ensures downstream components remain within safe operating limits during standardized surge testing.
How does UCLAMP1211P.TFT differ from standard TVS diodes in clamping behavior?
Unlike conventional TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), UCLAMP1211P.TFT uses a triggered FET architecture that maintains near-constant clamping (27.5–28V) from 24A to 40A and across –40°C to +125°C - eliminating thermal and current-dependent derating uncertainties present in PN-junction TVS devices.
What is the recommended PCB layout for optimal performance of UCLAMP1211P.TFT?
Place UCLAMP1211P.TFT as close as possible to the protected connector. Connect all three IN pins (4, 5, 6) with a single short, wide trace to the protected line, and tie all three GND pins (1, 2, 3) directly to a solid ground plane using ≥3 vias each. Avoid thermal pads - energy is dissipated in the silicon FET, not the package bottom.
Is UCLAMP1211P.TFT compatible with lead-free reflow soldering processes?
Yes, UCLAMP1211P.TFT is Pb-free, halogen-free, and RoHS/WEEE compliant, with a lead finish qualified for standard JEDEC J-STD-020D reflow profiles. Its DFN-6 package withstands peak temperatures up to 260°C for 30 seconds, matching industry-standard lead-free assembly requirements.
UCLAMP1211P.TFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0402 (1006 Metric)
- Series:
- µClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 14.2V
- Voltage - Clamping (Max) @ Ipp:
- 28.5V
- Current - Peak Pulse (10/1000µs):
- 7A (8/20µs)
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 25pF @ 1MHz (Max)
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP1006P2
UCLAMP1211P.TFT FAQ
1.How can I place an order for UCLAMP1211P.TFT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP1211P.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 UCLAMP1211P.TFT reliable?
The price and inventory of UCLAMP1211P.TFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP1211P.TFT is usually 5 days.
3.What payment methods are accepted for UCLAMP1211P.TFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP1211P.TFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP1211P.TFT?
UCLAMP1211P.TFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP1211P.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 UCLAMP1211P.TFT?
For technical support, including UCLAMP1211P.TFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP1211P.TFT requirements.
6.How does Aetrix verify that UCLAMP1211P.TFT is sourced from the original manufacturer or authorized distributors?
All UCLAMP1211P.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 UCLAMP1211P.TFT meets industry standards.
7.What is the process for return or replacement of UCLAMP1211P.TFT?
All UCLAMP1211P.TFT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP1211P.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 UCLAMP1211P.TFT part is unused and in its original packaging.
Return procedure for UCLAMP1211P.TFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP1211P.TFT Tags
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