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Semtech Corporation UCLAMP1271P.TNT
- Part No.:
- UCLAMP1271P.TNT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0603 (1610 Metric)
- Datasheet:
-
UCLAMP1271P.TNT.pdf
- Description:
- TVS DIODE 12VWM 30VC SGP1610N2
- Quantity:
- Payment:
- Shipping:
Inventory:30,035
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Product details
Overview
UCLAMP1271P.TNT from Semtech is a transient diverting suppressor designed for 12V EOS protection on single I/O or power lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 24A peak pulse current (8/20μs), 12V working voltage, and 20mΩ dynamic resistance. It protects USB Type-C VBUS, industrial load switch inputs, and IoT device power rails where stable clamping under temperature and current stress is critical.
For engineers reviewing the UCLAMP1271P.TNT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability across 24A–40A surge range, DFN-6 thermal performance at +125°C, low 175pF junction capacitance, and compatibility with 12V bus architectures requiring sub-30V clamping.
Technical Context
The UCLAMP1271P.TNT uses a surge-rated FET as its primary protection element, activated by an integrated precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant-27.5V at 24A and 27.6V at 40A-due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C with <600nA reverse leakage at 12V, 175pF capacitance at 1MHz/12V, and is rated for 1120W peak pulse power. The device targets unsymmetrical line protection and meets IEC 61000-4-4 (±4kV EFT) and IEC 61000-4-5 (±1kV, 1.2/50μs) standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 12 V - Maximum continuous DC operating voltage before clamping initiates |
| Clamping Voltage (VC) | 27.6 V at 40A (8/20μs) - Stable suppression level protecting downstream 30V-tolerant ICs |
| Peak Pulse Current (IPP) | 24 A - Rated surge handling per IEC 61000-4-5; supports industrial lightning surge compliance |
| ESD Withstand | ±30 kV contact & air - Full IEC 61000-4-2 Level 4 immunity without degradation |
| Dynamic Resistance (RDYN) | 20 mΩ - Enables flat clamping curve; reduces voltage overshoot during fast transients |
| Junction Capacitance (CJ) | 175 pF at 12V - Low enough for 12V power rail protection without signal integrity impact |
| Operating Temperature | –40°C to +125°C - Validated performance across automotive and industrial ambient ranges |
Pinout & Package
UCLAMP1271P.TNT is housed in a RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no solder mask defined). All six terminals are surface-mount; pins 1–3 are GND, pins 4–6 are IN. Board layout requires direct trace connection of all three IN pins and all three GND pins to minimize parasitic inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; must be connected to solid ground plane via multiple vias |
| 4, 5, 6 | IN | Protected line input; all three pins tied together to handle full 24A surge current and reduce impedance |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient diversion | Replaces traditional TVS with active shunt architecture for flat clamping vs. current/temperature |
| Constant clamping voltage | 27.5–27.6V across 24A–40A range eliminates derating needed for thermal drift |
| Low dynamic resistance | 20mΩ ensures minimal IR drop during high-current surges, preserving voltage margin |
| High-energy surge rating | 1120W peak pulse power enables compliance with IEC 61000-4-5 Level 3/4 industrial surge tests |
| Ultra-low leakage | <600nA at 12V prevents standby power loss in battery-powered IoT endpoints |
Applications
| USB Type-C VBUS Protection | Industrial Load Switch Input |
|---|---|
Use Scenario: Protecting 12V USB PD power delivery lines against ESD and lightning-induced surges in portable docking stations. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed directly at Type-C connector, clamping transients before reaching PD controller and buck converter. Use Value: Maintains 27.6V clamping at 40A and +125°C-well below 30V damage threshold of common PD controllers like STUSB4500. | Use Scenario: Safeguarding input stage of industrial e-fuse ICs (e.g., TPS25982) subjected to 1kV line surges in remote metering systems. IC Role / Device Role / Timing Role: Front-end transient clamp limiting voltage seen by load switch's internal MOSFET gate oxide and drain-source junction. Use Value: Prevents catastrophic failure of 30V-rated load switches by holding clamped voltage 2.4V below their absolute maximum rating. |
| Smart Building Sensor Node Power Rail | 12V Automotive Accessory Module |
Use Scenario: Securing 12V supply input of LoRaWAN sensor nodes deployed outdoors with exposed cabling. IC Role / Device Role / Timing Role: Single-device solution for combined ESD, EFT, and surge protection on unregulated 12V input feeding PMIC and MCU. Use Value: Eliminates need for multi-stage protection (TVS + MOV + filter), reducing BOM count and PCB area by >40%. | Use Scenario: Protecting infotainment USB hub power input in 12V vehicle accessory modules subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Secondary surge limiter after primary TVS, providing precise clamping where standard TVS exhibits excessive voltage rise at high temperature. Use Value: Ensures clamping stays at 27.6V even at +105°C ambient-critical for maintaining reliability in engine bay-adjacent mounting. |
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 architecture, 12V VRWM, but rated for 24A (not 40A) peak pulse current | Suitable for lower-energy environments (e.g., consumer USB hubs), not industrial 1kV surge zones | Select when 24A IPP suffices and cost optimization is prioritized over headroom |
| SM712-02HTG | Traditional bipolar TVS array; 12V VRWM, 300W peak power, 12A IPP, higher clamping (~35V at 12A) | Limited to ESD/EFT-only use; cannot meet IEC 61000-4-5 1kV test without derating | Choose only for space-constrained designs where ultra-low capacitance (<10pF) is mandatory and surge energy is low |
Compared with TDS1211P and SM712-02HTG, UCLAMP1271P.TNT delivers superior surge robustness (40A/1120W), flatter clamping (27.6V vs. rising curves), and wider temperature stability-making it the preferred choice for mission-critical 12V power rail protection where failure risk must be minimized.
Availability
UCLAMP1271P.TNT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch protection, smart building sensor nodes, and 12V automotive accessory modules requiring stable component supply across extended temperature and surge stress conditions.
Supply support for UCLAMP1271P.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 signal integrity.
The UCLAMP family targets high-reliability transient suppression using active FET-based architecture-designed specifically for 12V–24V power rails in USB PD, industrial automation, and automotive electronics where conventional TVS limitations are unacceptable.
FAQ
What is the maximum continuous operating voltage for UCLAMP1271P.TNT?
The UCLAMP1271P.TNT has a reverse stand-off voltage (VRWM) of 12 V, meaning it can continuously withstand up to 12 V DC without entering clamping mode. This makes it suitable for nominal 12V power rails such as USB PD 12V profiles and industrial 12V control inputs. Operation above 12V triggers the protection circuit, initiating clamping at ~13.5V breakdown.
How does UCLAMP1271P.TNT achieve stable clamping voltage across varying surge currents?
UCLAMP1271P.TNT uses a surge-rated FET as its main protection element, controlled by a precision trigger circuit. As surge current increases, the FET's RDS(on) decreases, counteracting voltage rise. This results in near-constant clamping: 27.5V at 24A and 27.6V at 40A (8/20μs), unlike TVS diodes whose clamping rises linearly with current.
Can UCLAMP1271P.TNT replace standard TVS diodes in existing 12V designs?
Yes-UCLAMP1271P.TNT is a direct functional upgrade for 12V TVS diodes like SMAJ12A or SMCJ12A, offering superior clamping stability and higher surge rating. Its DFN-6 footprint matches many 6-pin TVS arrays, but PCB layout must ensure all three IN and all three GND pins are fully connected per Semtech's layout guidelines to achieve rated 24A performance.
What is the junction capacitance of UCLAMP1271P.TNT and how does it affect circuit performance?
UCLAMP1271P.TNT exhibits 175 pF junction capacitance at 12V and 1 MHz. This value is optimized for 12V power rail protection-not signal-line use-so it introduces negligible impedance on DC/low-frequency paths while still enabling effective high-energy transient shunting without resonance or filtering side effects.
Does UCLAMP1271P.TNT meet international surge immunity standards?
Yes-UCLAMP1271P.TNT is validated to IEC 61000-4-2 (±30kV ESD), IEC 61000-4-4 (±4kV EFT), and IEC 61000-4-5 (±1kV, 1.2/50μs voltage waveform with 42Ω source). Its 24A/40A peak pulse rating satisfies Level 3 and Level 4 requirements for industrial equipment and USB PD infrastructure per these standards.
UCLAMP1271P.TNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0603 (1610 Metric)
- Series:
- uClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 14V
- Voltage - Clamping (Max) @ Ipp:
- 30V
- Current - Peak Pulse (10/1000µs):
- 45A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 275pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SGP1610N2
UCLAMP1271P.TNT FAQ
1.How can I place an order for UCLAMP1271P.TNT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP1271P.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 UCLAMP1271P.TNT reliable?
The price and inventory of UCLAMP1271P.TNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP1271P.TNT is usually 5 days.
3.What payment methods are accepted for UCLAMP1271P.TNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP1271P.TNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP1271P.TNT?
UCLAMP1271P.TNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP1271P.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 UCLAMP1271P.TNT?
For technical support, including UCLAMP1271P.TNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP1271P.TNT requirements.
6.How does Aetrix verify that UCLAMP1271P.TNT is sourced from the original manufacturer or authorized distributors?
All UCLAMP1271P.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 UCLAMP1271P.TNT meets industry standards.
7.What is the process for return or replacement of UCLAMP1271P.TNT?
All UCLAMP1271P.TNT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP1271P.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 UCLAMP1271P.TNT part is unused and in its original packaging.
Return procedure for UCLAMP1271P.TNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP1271P.TNT Tags
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