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Semtech Corporation UCLAMP1211Z.TFT
- Part No.:
- UCLAMP1211Z.TFT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0201 (0603 Metric)
- Datasheet:
-
UCLAMP1211Z.TFT.pdf
- Description:
- TVS DIODE 12VWM 25VC SLP0603P2X3
- Quantity:
- Payment:
- Shipping:
Inventory:29,610
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Product details
Overview
UCLAMP1211Z.TFT from Semtech is a single-line transient voltage suppression (TVS) diode designed for board-level ESD protection of 12V signal or power lines. It delivers ±30kV IEC 61000-4-2 contact/air ESD immunity, 7A 8/20µs peak pulse current handling, 0.30Ω typical dynamic resistance, and ultra-low 19–25pF junction capacitance in a 0.6 × 0.3 × 0.25 mm SLP0603P2X3 package-ideal for space-constrained portable electronics.
For engineers reviewing the UCLAMP1211Z.TFT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage at 7A (25V), reverse stand-off voltage (12V), leakage current (<50nA at 12V), ESD strike endurance (>1000 cycles), and compatibility with high-speed interfaces requiring sub-25pF loading.
Technical Context
The UCLAMP1211Z.TFT employs silicon-avalanche solid-state technology to provide fast-response, low-clamping protection against electrostatic discharge transients. Its bidirectional structure supports symmetrical ±12V operation with a 14.2–18V breakdown voltage range and 20V clamping at 1A.
Designed for PCB-level integration, it features a two-terminal configuration optimized for single-line protection without shared ground paths. The device operates across –55°C to +125°C and maintains stable performance under repeated ESD stress per IEC 61000-4-2 Level 4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | ±12 V - Supports bidirectional 12V signal/power line protection without polarity constraints |
| ESD Withstand | ±30 kV (IEC 61000-4-2) - Survives worst-case human-body model contact and air-gap discharges |
| Clamping Voltage | 25 V at 7 A (8/20 µs) - Limits transient overvoltage to safe levels for downstream 12V-rated ICs |
| Junction Capacitance | 19–25 pF at 0 V - Enables use on USB 2.0, HDMI, or other high-speed data lines without signal integrity loss |
| Dynamic Resistance | 0.30 Ω (typ) - Ensures minimal voltage overshoot during fast ESD events (TLP 0.2/100 ns) |
| Leakage Current | <50 nA at 12 V - Prevents measurable DC loading on battery-powered or low-power sensor circuits |
| Package Size | 0.6 × 0.3 × 0.25 mm - Fits within tight layout constraints of smartphones, tablets, and wearables |
Pinout & Package
UCLAMP1211Z.TFT is housed in the SLP0603P2X3 surface-mount package-a 2-pin, bottom-terminated, lead-free NiAu-finished ultra-small outline measuring 0.6 mm × 0.3 mm × 0.25 mm nominal height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode/Cathode (bidirectional) | Either terminal may serve as input or return path; symmetric conduction enables flexible PCB routing |
| Pin 2 | Anode/Cathode (bidirectional) | Paired with Pin 1 to form a single protected line; no dedicated ground or VCC pin required |
Key Features
| Feature | Design Value |
|---|---|
| ESD endurance | Withstands >1000 IEC 61000-4-2 Level 4 strikes without parameter degradation |
| Low clamping ratio | VC/VRWM = 25V/12V ≈ 2.1 - Delivers superior voltage limiting versus standard TVS diodes |
| Ultra-low capacitance | 19–25 pF at 0 V - Preserves signal rise/fall times on 480 Mbps USB 2.0 and similar interfaces |
| Pb-free & RoHS compliance | NiAu lead finish and halogen-free construction meet global environmental and assembly requirements |
| Thermal stability | Rated for continuous operation from –55°C to +125°C junction temperature |
Applications
| Smartphone Front-Panel Interfaces | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Protecting touchscreen controller I²C lines and proximity sensor inputs exposed on front glass assemblies. IC Role / Device Role / Timing Role: Bidirectional ESD clamp placed directly at connector entry point to shunt transients before reaching ASIC GPIOs. Use Value: Prevents latch-up or permanent damage from repeated pocket or handbag ESD events while maintaining <25pF loading for reliable touch response. | Use Scenario: Safeguarding D+ and D– differential pairs in compact mobile accessories and OTG adapters. IC Role / Device Role / Timing Role: Single-line TVS per data line, minimizing inter-pair skew and preserving USB 2.0 eye diagram integrity. Use Value: Achieves full IEC 61000-4-2 Level 4 compliance without degrading 480 Mbps data transmission or requiring layout detuning. |
| Tablet PC Power Button Circuits | 12V Automotive Accessory Port Protection |
Use Scenario: Shielding momentary mechanical switch inputs connected to PMIC reset or wake-up logic. IC Role / Device Role / Timing Role: Low-leakage (≤50nA) clamp ensuring no false triggering during standby, with fast turn-on for ESD pulses. Use Value: Eliminates field failures caused by user-induced static discharge while drawing negligible current from coin-cell or backup rails. | Use Scenario: Hardening 12V accessory ports (e.g., OBD-II, USB-C PD input) against ignition noise and jump-start transients. IC Role / Device Role / Timing Role: Primary line protector rated for 7A 8/20µs surges and ±30kV ESD, mounted adjacent to port connector. Use Value: Provides robust first-stage protection without derating due to thermal accumulation, supporting automotive-grade reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD1E01B04DPYR | Lower working voltage (5.5V), higher capacitance (10pF typ), same 0201 footprint | Optimized for 3.3V/5V logic lines-not suitable for 12V power rail protection | Select only when protecting sub-6V data lines where lower clamping voltage is prioritized over 12V compatibility |
| SMAJ12A | Larger SMA package (4.5 × 2.7 mm), higher clamping (30V at 7A), unidirectional | Requires external biasing for bidirectional use; unsuitable for ultra-dense layouts | Choose only when board area is unconstrained and unidirectional 12V protection suffices |
Compared with TPD1E01B04DPYR and SMAJ12A, the UCLAMP1211Z.TFT uniquely combines 12V bidirectional operation, 0.6 × 0.3 mm size, and sub-25pF capacitance-enabling direct integration into high-density 12V interface paths without redesigning layout or compromising speed.
Availability
UCLAMP1211Z.TFT is available at Aetrix Electronics and suitable for smartphone front-panel interfaces, USB 2.0 data line protection, and 12V automotive accessory port protection requiring stable component supply and long-term lifecycle support.
Supply support for UCLAMP1211Z.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 analog and mixed-signal ICs for precision sensing, power management, and protection.
The μClamp® product line was developed specifically for ultra-compact, high-reliability board-level ESD protection in portable consumer electronics-prioritizing low capacitance, small footprint, and repeatable surge performance.
FAQ
What is the maximum clamping voltage of UCLAMP1211Z.TFT under a 7A 8/20µs surge?
The UCLAMP1211Z.TFT clamps to 25 V under a 7A 8/20µs transient pulse, as specified in its absolute maximum ratings table. This value ensures downstream 12V-rated components remain within safe operating limits during surge events. The clamping performance is verified per IEC 61000-4-5 waveform standards and confirmed across production lots. UCLAMP1211Z.TFT maintains this clamping level consistently across its full operating temperature range.
Does UCLAMP1211Z.TFT support bidirectional ESD protection?
Yes, UCLAMP1211Z.TFT is a bidirectional TVS diode with symmetrical ±12V working voltage and identical electrical characteristics between Pin 1 and Pin 2 in either direction. Its silicon-avalanche structure enables equal clamping for positive and negative transients, making it suitable for AC-coupled or floating signal lines. This behavior is explicitly confirmed in the "Electrical Characteristics" table under reverse stand-off and breakdown voltage test conditions for both polarities.
What is the junction capacitance of UCLAMP1211Z.TFT at 0V bias?
The junction capacitance of UCLAMP1211Z.TFT is 19–25 pF at 0V reverse bias and 1 MHz frequency, as measured per the datasheet's Electrical Characteristics table. This low, tightly bounded capacitance allows integration into high-speed interfaces such as USB 2.0 without distorting signal edges or violating eye diagram masks. The value remains stable across process variation and is validated using calibrated RF impedance analyzers.
Can UCLAMP1211Z.TFT be used for 12V power rail protection?
Yes, UCLAMP1211Z.TFT is explicitly rated for 12V power line protection, with a 12V reverse stand-off voltage and ability to safely conduct 7A 8/20µs surges. Its low dynamic resistance (0.30 Ω) minimizes IR drop during clamping, and its ±30kV ESD rating exceeds IEC 61000-4-2 Level 4 requirements. The device is listed in the Applications section for "12V Power Protection," confirming its suitability for this role.
Is UCLAMP1211Z.TFT compatible with lead-free reflow processes?
Yes, UCLAMP1211Z.TFT is fully compatible with lead-free reflow per JEDEC J-STD-020, as stated in the Application Information section. Its NiAu lead finish and SLP0603P2X3 package are qualified for peak temperatures up to 260°C. Recommended stencil thickness is 0.075 mm, and Type 4 solder paste is advised. The device has passed thermal cycling and solder joint reliability testing under IPC-A-610 Class 2 and Class 3 conditions.
UCLAMP1211Z.TFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0201 (0603 Metric)
- Series:
- uClamp®
- 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:
- 25V
- Current - Peak Pulse (10/1000µs):
- 7A (8/20µs)
- Power - Peak Pulse:
- 175W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 19pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP0603P2X3
UCLAMP1211Z.TFT FAQ
1.How can I place an order for UCLAMP1211Z.TFT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP1211Z.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 UCLAMP1211Z.TFT reliable?
The price and inventory of UCLAMP1211Z.TFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP1211Z.TFT is usually 5 days.
3.What payment methods are accepted for UCLAMP1211Z.TFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP1211Z.TFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP1211Z.TFT?
UCLAMP1211Z.TFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP1211Z.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 UCLAMP1211Z.TFT?
For technical support, including UCLAMP1211Z.TFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP1211Z.TFT requirements.
6.How does Aetrix verify that UCLAMP1211Z.TFT is sourced from the original manufacturer or authorized distributors?
All UCLAMP1211Z.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 UCLAMP1211Z.TFT meets industry standards.
7.What is the process for return or replacement of UCLAMP1211Z.TFT?
All UCLAMP1211Z.TFT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP1211Z.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 UCLAMP1211Z.TFT part is unused and in its original packaging.
Return procedure for UCLAMP1211Z.TFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP1211Z.TFT Tags
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