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Semtech Corporation UCLAMP2801T.TCT
- Part No.:
- UCLAMP2801T.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
UCLAMP2801T.TCT.pdf
- Description:
- TVS DIODE 28VWM 60VC SLP1006P2T
- Quantity:
- Payment:
- Shipping:
Inventory:8,484
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Product details
Overview
UCLAMP2801T.TCT from Semtech is a transient diverting suppressor designed for high-energy EOS protection of 28V-rated I/O or power lines in USB Type-C, USB PD, and industrial interfaces. It delivers ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), and stable 28V clamping across temperature and current range using a surge-rated FET shunt architecture.
For engineers reviewing the UCLAMP2801T.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under 40A transients, low dynamic resistance (<25 mΩ), junction capacitance (≤200 pF at 28V), and DFN-6 package compatibility with high-density USB PD front-end layouts.
Technical Context
The UCLAMP2801T.TCT employs a precision-triggered, surge-rated MOSFET as its primary protection element - not a conventional TVS diode - enabling near-constant clamping voltage independent of peak pulse current magnitude or operating temperature. Its trigger circuit activates the FET when input voltage exceeds breakdown, routing transients to ground via ultra-low RDS(on).
Unlike standard TVS devices whose clamping voltage rises linearly with IPP (VC = VBR + IPP × RDYN), the UCLAMP2801T.TCT maintains clamping within 27.5–28.0 V from 24A to 40A (1.2/50μs + 8/20μs combo wave) and across –40°C to +125°C ambient, ensuring predictable protection margin for 28V bus systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 28 V - defines maximum continuous DC or RMS operating voltage on protected line without leakage or degradation |
| Clamping Voltage | 28 V @ 40A (8/20μs) - ensures downstream 28V-rated ICs (e.g., USB PD controllers, load switches) remain below absolute maximum ratings during worst-case surge |
| Peak Pulse Current | 40 A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial and USB PD applications |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD requirements without derating |
| Dynamic Resistance | 25 mΩ - enables low-voltage drop during conduction, minimizing power dissipation and thermal stress during multi-pulse events |
| Junction Capacitance | 190 pF @ 28 V, 1 MHz - compatible with USB PD CC/SBU and lower-speed power rail protection; not suitable for SuperSpeed data lines |
Pinout & Package
UCLAMP2801T.TCT is housed in a RoHS-compliant, halogen-free DFN-6 package measuring 1.6 mm × 1.6 mm × 0.55 mm with UL 94V-0 molding compound. The package features three dedicated ground terminals and three parallel input terminals optimized for low-inductance transient path routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for all surge current paths; must be connected to solid ground plane via multiple vias to minimize inductance and maximize IPP handling |
| 4, 5, 6 | IN | Parallel-connected input terminals for protected line (e.g., VBUS, CC, SBU); all three pins must be routed together to ensure balanced current sharing and full 40A rating |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Enables flat clamping response (27.5–28.0 V) across full 24–40A IPP range and –40°C to +125°C, eliminating thermal runaway risk of conventional TVS |
| Low dynamic resistance | 25 mΩ ensures minimal voltage overshoot during fast-rising transients and reduces joule heating during repeated surges |
| High EFT immunity | ±4 kV per IEC 61000-4-4 (5/50 ns, 100 kHz/5 kHz) protects against repetitive burst noise in industrial control and metering environments |
| Space-efficient DFN-6 | 1.6 mm × 1.6 mm footprint saves >60% board area vs. SO-8 or SOT-23 TVS solutions while maintaining full 40A surge rating |
Applications
| USB PD Power Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20–28V USB Power Delivery bus lines against lightning-induced surges and connector hot-plug ESD. IC Role / Device Role / Timing Role: Primary front-end transient suppressor placed immediately after Type-C receptacle, clamping VBUS before it reaches PD controller and buck-boost ICs. Use Value: Maintains 28V clamping at 40A and 125°C - preventing latch-up or gate oxide damage in 28V-rated PD controllers where conventional TVS would exceed 38V at same conditions. |
Use Scenario: Safeguarding enable and input pins of industrial-grade e-fuses and load switches (e.g., TPS25940, MPQ5072) exposed to field wiring surges. IC Role / Device Role / Timing Role: Shunt protector that limits voltage across switch FET's drain-source during EOS, avoiding avalanche failure or gate oxide rupture. Use Value: Clamps to ≤28V at 40A, staying well below typical 30–36V VDS(max) ratings of protected load switches - enabling reliable operation without overdesigning switch SOA. |
| IoT Sensor Hub Power Rail | Automated Test Equipment (ATE) Signal Conditioning Inputs |
|
Use Scenario: Securing 24–28V auxiliary power rails feeding sensor fusion modules, wireless SoCs, and PMICs in battery-powered IoT gateways. IC Role / Device Role / Timing Role: Standalone EOS guard for unregulated DC inputs subject to accidental 48V PoE miswiring or inductive kickback from solenoid drivers. Use Value: Delivers ±30kV ESD robustness and 40A surge tolerance in 1.6 mm² footprint - enabling compact, sealed enclosures without external spark gaps or bulky MOVs. |
Use Scenario: Protecting analog front-end inputs of ATE channel cards handling 28V test signals, relay driver outputs, or calibration reference sources. IC Role / Device Role / Timing Role: Low-capacitance (190 pF), low-leakage (≤600 nA @ 28V) transient clamp preserving signal integrity while blocking EOS energy. Use Value: Stable clamping prevents false triggering of comparators or ADC overvoltage faults during ESD events - reducing test aborts and improving yield in high-throughput production testing. |
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, 27.5–28V clamping @ 40A, identical DFN-6 package and pinout | Optimized for 20–22V USB PD buses; lower VRWM limits use on 28V rails | Select when protecting 22V systems requiring identical performance with tighter voltage margin |
| UCLAMP3301T.TCT | 33V working voltage, 33V clamping @ 40A, same DFN-6 footprint but higher VBR (36.5V typ) | Suitable for 30–33V industrial power rails; higher clamping may exceed downstream IC limits in 28V designs | Choose only if system nominal voltage exceeds 28V or requires higher VRWM margin against ripple |
Compared with TDS2211P and UCLAMP3301T.TCT, the UCLAMP2801T.TCT uniquely balances 28V system compatibility, 28V clamping headroom, and DFN-6 layout reuse - making it the optimal choice for USB PD 3.1 EPR, 28V PoE++ injectors, and industrial 24VDC+ systems where both voltage margin and surge robustness are critical.
Availability
UCLAMP2801T.TCT is available at Aetrix Electronics and suitable for USB PD implementations, industrial load switch protection, and IoT power rail hardening requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across manufacturing lots.
Supply support for UCLAMP2801T.TCT 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 series is Semtech's family of transient diverting suppressors engineered specifically for high-reliability EOS protection in USB, industrial, and automotive power interfaces - replacing traditional TVS diodes with FET-based architectures for superior clamping stability.
FAQ
What is the maximum continuous operating voltage for UCLAMP2801T.TCT?
The UCLAMP2801T.TCT has a reverse stand-off voltage (VRWM) of 28 V, meaning it can reliably withstand up to 28 V DC or RMS on its input terminals without significant leakage or degradation. This makes UCLAMP2801T.TCT ideal for 24–28V systems such as USB PD 3.1 EPR, industrial 24VDC+, and PoE++ injectors where precise voltage margin is required.
How does UCLAMP2801T.TCT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage increases linearly with peak pulse current (VC = VBR + IPP × RDYN), the UCLAMP2801T.TCT uses a triggered FET shunt that maintains clamping at 27.5–28.0 V from 24A to 40A and across –40°C to +125°C. This flat response ensures predictable protection margins for sensitive 28V-rated ICs in UCLAMP2801T.TCT-based designs.
Can UCLAMP2801T.TCT be used on USB SuperSpeed differential pairs?
No - UCLAMP2801T.TCT is not suitable for USB SuperSpeed (TX/RX, SSTX/SSRX) lines due to its 190 pF junction capacitance at 28 V, which would severely degrade signal integrity and violate USB 3.x impedance and loss specifications. For those lines, low-capacitance TVS devices like RClamp3371ZC (<0.25 pF) must be used instead of UCLAMP2801T.TCT.
What is the recommended PCB layout for UCLAMP2801T.TCT to achieve full 40A surge rating?
To achieve the full 40A (8/20μs) rating, all three IN pins (4, 5, 6) must be routed together in a single low-inductance trace directly from the protected connector, and all three GND pins (1, 2, 3) must connect to a solid ground plane using ≥4 thermal vias. UCLAMP2801T.TCT must be placed within 3 mm of the connector to minimize parasitic inductance - otherwise, clamping performance degrades significantly.
Is UCLAMP2801T.TCT RoHS and REACH compliant?
Yes - UCLAMP2801T.TCT is Pb-free, halogen-free, and fully compliant with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Its DFN-6 package uses UL 94V-0 rated molding compound and lead-free terminal finish, meeting global environmental and safety requirements for industrial and consumer electronics.
UCLAMP2801T.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0402 (1006 Metric)
- Series:
- uClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28V (Max)
- Voltage - Breakdown (Min):
- 32V
- Voltage - Clamping (Max) @ Ipp:
- 60V
- Current - Peak Pulse (10/1000µs):
- 4A (8/20µs)
- Power - Peak Pulse:
- 240W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 25pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP1006P2T
UCLAMP2801T.TCT FAQ
1.How can I place an order for UCLAMP2801T.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP2801T.TCT 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 UCLAMP2801T.TCT reliable?
The price and inventory of UCLAMP2801T.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP2801T.TCT is usually 5 days.
3.What payment methods are accepted for UCLAMP2801T.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP2801T.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP2801T.TCT?
UCLAMP2801T.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP2801T.TCT 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 UCLAMP2801T.TCT?
For technical support, including UCLAMP2801T.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP2801T.TCT requirements.
6.How does Aetrix verify that UCLAMP2801T.TCT is sourced from the original manufacturer or authorized distributors?
All UCLAMP2801T.TCT 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 UCLAMP2801T.TCT meets industry standards.
7.What is the process for return or replacement of UCLAMP2801T.TCT?
All UCLAMP2801T.TCT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP2801T.TCT, 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 UCLAMP2801T.TCT part is unused and in its original packaging.
Return procedure for UCLAMP2801T.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP2801T.TCT Tags
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