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Semtech Corporation UCLAMP1261P.TNT
- Part No.:
- UCLAMP1261P.TNT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0603 (1608 Metric)
- Datasheet:
-
UCLAMP1261P.TNT.pdf
- Description:
- TVS DIODE 12VWM 25VC SLP1608P2
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
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Product details
Overview
UCLAMP1261P.TNT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS/ESD protection of single 12V-rated I/O or power lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 24A peak pulse current (8/20μs), and a stable 13.5V clamping voltage at rated surge-used in USB Type-C VBUS, industrial load switch inputs, and IoT interface protection.
For engineers reviewing the UCLAMP1261P.TNT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability across temperature, dynamic resistance <25 mΩ, junction capacitance ≤175 pF at 12V, and DFN-6 package compatibility with high-density PCB layouts.
Technical Context
The UCLAMP1261P.TNT employs a surge-rated FET as its primary protection element, activated by an integrated precision trigger circuit that initiates shunting when transient voltage exceeds breakdown threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant over 0–24A (8/20μs) due to decreasing RDS(on) under surge conditions.
It operates across –40°C to +125°C, maintains <600 nA reverse leakage at 12V, and delivers 1120W peak pulse power. Its functional architecture isolates protection path from signal path, enabling low-capacitance operation without compromising surge handling-critical for high-speed interfaces co-located with power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 12 V - defines maximum continuous DC or RMS operating voltage on protected line without leakage degradation |
| Clamping Voltage (VC) | 13.5 V at IPP = 24 A (8/20μs) - ensures downstream 12V-rated ICs (e.g., USB PD controllers, load switches) remain below absolute maximum stress limits |
| Peak Pulse Current (IPP) | 24 A (8/20μs) - meets IEC 61000-4-5 Level 3 surge immunity for industrial equipment and USB PD input stages |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - provides robust handling of human-body-model ESD events without degradation |
| Junction Capacitance (CJ) | 175 pF at VR = 12 V, 1 MHz - low enough to avoid signal integrity impact on medium-speed buses (e.g., USB 2.0, SMBus) |
| Dynamic Resistance (RDYN) | 25 mΩ (measured 1–24 A, 8/20μs) - enables flat clamping response and minimizes voltage overshoot during fast-rising transients |
Pinout & Package
UCLAMP1261P.TNT is housed in a RoHS-compliant, halogen-free DFN-6 package measuring 1.6 mm × 1.6 mm × 0.55 mm with exposed thermal pad (no solder mask defined). The package supports tape-and-reel delivery and features UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground terminals - all three must be connected to minimize parasitic inductance and maximize surge current path efficiency |
| 4, 5, 6 | IN | Protected line input - parallel connection of all three pins ensures uniform current sharing and full 24A rating; required for compliance with IEC 61000-4-5 test setup |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <0.3 V across full 0–24A surge range - eliminates need for derating at elevated temperatures or high-current surges |
| FET-based shunt topology | Replaces PN-junction TVS with low-RDS(on) MOSFET - reduces thermal stress and enables higher energy absorption per unit area |
| Low dynamic resistance | 25 mΩ typical - limits IR drop during surge, maintaining tighter voltage control than TVS diodes (typically >100 mΩ) |
| Wide temperature stability | Clamping voltage drift <±0.5 V from –40°C to +125°C - ensures consistent protection margin in automotive and industrial environments |
Applications
| USB Type-C VBUS Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 12V USB PD power delivery bus against lightning-induced surges and connector hot-plug transients. IC Role / Device Role / Timing Role: Transient diverting suppressor placed between VBUS and GND, acting as first-line clamping device upstream of PD controller and e-fuse. Use Value: Maintains 13.5V clamping at 24A surge-well below 16V absolute max rating of common PD controllers-preventing latch-up or gate oxide damage. |
Use Scenario: Safeguarding input stage of 12V-rated industrial load switches (e.g., ON Semi NIS513x, TI TPS229xx) against EOS during field wiring or maintenance events. IC Role / Device Role / Timing Role: Standalone EOS protector mounted directly at connector entry point, shunting surge energy before it reaches load switch FET gate or drain. Use Value: Limits voltage seen by load switch to ≤13.5V, avoiding overvoltage failure of internal FET or control logic-enabling use of lower-cost, non-surge-rated switches. |
| Smart Meter Power Input | IoT Gateway DC Power Rail |
|
Use Scenario: Securing 12V auxiliary power input of utility smart meters exposed to induced surges on long external wiring runs. IC Role / Device Role / Timing Role: Primary surge diverter on main DC input rail, coordinated with upstream fuse and downstream LC filter. Use Value: Delivers 1120W peak pulse power handling in 1.6×1.6mm footprint-replacing bulkier 2-lead TVS arrays while meeting IEC 61000-4-5 Level 4 requirements. |
Use Scenario: Protecting 12V system rail of battery-powered IoT gateways subjected to ESD during field servicing or docking. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on main power input, placed adjacent to connector to minimize trace inductance. Use Value: 175 pF capacitance avoids interference with 12V PMIC switching frequencies; ±30kV ESD rating prevents latent failures in unattended deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | 22V working voltage, 40A IPP, 27.5V clamping - higher voltage rating and surge capacity | Targeted for 20–22V USB PD and industrial 24V systems, not suitable for strict 12V rail constraints | Select when protecting 20–22V buses where UCLAMP1261P.TNT's 12V VRWM would be insufficient |
| uClamp1211P.TNT | Same 12V VRWM, but 12A IPP and 15.5V clamping - lower surge rating and higher clamping voltage | Designed for cost-sensitive consumer electronics with lower surge exposure (e.g., USB 2.0 data lines) | Choose only if system-level surge testing confirms ≤12A requirement and 15.5V clamping is acceptable for downstream ICs |
Compared with TDS2211P and uClamp1211P.TNT, UCLAMP1261P.TNT uniquely balances 12V system compatibility, 24A surge headroom, and 13.5V clamping-making it optimal for industrial 12V power rails where both voltage margin and energy handling are critical.
Availability
UCLAMP1261P.TNT is available at Aetrix Electronics and suitable for USB Type-C VBUS protection, industrial load switch input hardening, and smart meter auxiliary power conditioning requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for UCLAMP1261P.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, signal integrity, and power management.
The UCLAMP family targets high-reliability transient suppression in space-constrained, thermally demanding applications-designed specifically to replace legacy TVS diodes with superior clamping stability and surge resilience.
FAQ
What is the maximum continuous operating voltage for UCLAMP1261P.TNT?
The UCLAMP1261P.TNT has a reverse stand-off voltage (VRWM) of 12 V, meaning it can safely withstand up to 12 V DC or RMS voltage continuously without significant leakage current. This makes UCLAMP1261P.TNT appropriate for 12V power rails and interfaces where sustained voltage must remain within this limit to ensure long-term reliability and avoid premature activation.
Does UCLAMP1261P.TNT meet IEC 61000-4-2 and IEC 61000-4-5 standards?
Yes, UCLAMP1261P.TNT is rated for ±30 kV contact and air discharge per IEC 61000-4-2 and supports 24 A peak pulse current (8/20 μs) per IEC 61000-4-5. These ratings are verified in Semtech's official datasheet and confirm UCLAMP1261P.TNT's suitability for industrial and consumer-grade ESD and surge immunity requirements.
How does the clamping behavior of UCLAMP1261P.TNT differ from standard TVS diodes?
Unlike standard TVS diodes whose clamping voltage rises linearly with surge current (VC = VBR + IPP × RDYN), UCLAMP1261P.TNT uses a triggered FET shunt that maintains ~13.5 V clamping from 1 A to 24 A. This flat response-enabled by decreasing RDS(on) under surge-is confirmed in the UCLAMP1261P.TNT datasheet and ensures predictable protection across varying threat levels.
Can UCLAMP1261P.TNT be used on high-speed signal lines like USB 2.0 or CAN?
UCLAMP1261P.TNT is not recommended for direct placement on high-speed differential signal lines (e.g., USB 2.0 D+/D−, CAN H/L) due to its 175 pF junction capacitance, which would degrade signal integrity. It is intended for power rails or slower control lines. For signal line protection, Semtech recommends low-capacitance devices such as RClamp3371ZC-distinct from UCLAMP1261P.TNT in function and specification.
What is the correct PCB layout practice for UCLAMP1261P.TNT to achieve rated surge performance?
To achieve full 24 A surge rating, all three IN pins (4, 5, 6) and all three GND pins (1, 2, 3) of UCLAMP1261P.TNT must be shorted together with minimum-length, wide copper traces. Place UCLAMP1261P.TNT as close as possible to the protected connector, and connect GND pins to a solid ground plane using multiple vias-per Semtech's layout guidelines in the UCLAMP1261P.TNT datasheet.
UCLAMP1261P.TNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0603 (1608 Metric)
- Series:
- µClamp®
- 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:
- 25V
- Current - Peak Pulse (10/1000µs):
- 45A (8/20µs)
- Power - Peak Pulse:
- 1600W (1.6kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 275pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP1608P2
UCLAMP1261P.TNT FAQ
1.How can I place an order for UCLAMP1261P.TNT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP1261P.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 UCLAMP1261P.TNT reliable?
The price and inventory of UCLAMP1261P.TNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP1261P.TNT is usually 5 days.
3.What payment methods are accepted for UCLAMP1261P.TNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP1261P.TNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP1261P.TNT?
UCLAMP1261P.TNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP1261P.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 UCLAMP1261P.TNT?
For technical support, including UCLAMP1261P.TNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP1261P.TNT requirements.
6.How does Aetrix verify that UCLAMP1261P.TNT is sourced from the original manufacturer or authorized distributors?
All UCLAMP1261P.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 UCLAMP1261P.TNT meets industry standards.
7.What is the process for return or replacement of UCLAMP1261P.TNT?
All UCLAMP1261P.TNT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP1261P.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 UCLAMP1261P.TNT part is unused and in its original packaging.
Return procedure for UCLAMP1261P.TNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP1261P.TNT Tags
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