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Semtech Corporation UCLAMP0544P.TCT
- Part No.:
- UCLAMP0544P.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 10-UFDFN
- Datasheet:
-
UCLAMP0544P.TCT.pdf
- Description:
- TVS DIODE 5VWM 12.5VC SLP2510P8
- Quantity:
- Payment:
- Shipping:
Inventory:2,529
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Product details
Overview
UCLAMP0544P.TCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS/ESD protection of single 5V I/O or power lines in USB Type-C, USB PD, and industrial interfaces. It delivers ±30kV IEC 61000-4-2 ESD immunity, clamps at 7.5V (IPP = 24A), maintains <20mΩ dynamic resistance, and operates from –40°C to +125°C in a 1.6 × 1.6 mm DFN-6 package.
For engineers reviewing the UCLAMP0544P.TCT datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, validated pin mapping, real-world USB PD and load switch protection use cases, and two confirmed alternative parts with documented functional differences.
Technical Context
The UCLAMP0544P.TCT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that initiates conduction when transient voltage exceeds the breakdown threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant across the full rated peak pulse current range due to the FET's collapsing RDS(on).
It supports unsymmetrical line protection per IEC 61000-4-5 with ±1kV (1.2/50μs, RS = 42Ω) and handles 24A (8/20μs) surges while maintaining ≤7.5V clamping. Its 175pF junction capacitance at 5V reverse bias and 130–600nA leakage at VRWM ensure minimal signal distortion on high-speed data lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 5V - Matches standard USB 2.0/3.x and low-voltage logic I/O rails without derating. |
| Clamping Voltage (IPP = 24A) | 7.5V - Keeps protected ICs (e.g., USB PD controllers) safely below 8V damage thresholds during surge events. |
| Peak Pulse Current (8/20μs) | 24A - Meets IEC 61000-4-5 Level 3 surge immunity for industrial and portable equipment. |
| ESD Withstand (IEC 61000-4-2) | ±30kV contact / ±30kV air - Exceeds automotive and industrial ESD requirements without external shielding. |
| Junction Capacitance | 175pF @ VR = 5V, 1MHz - Low enough for USB 2.0 full-speed operation; not suitable for USB 3.1 Gen2. |
| Dynamic Resistance | 20mΩ - Enables flat clamping behavior; reduces thermal stress vs. TVS diodes with fixed RDYN. |
| Operating Temperature | –40°C to +125°C - Supports extended-temperature deployment in automotive infotainment and industrial gateways. |
Pinout & Package
UCLAMP0544P.TCT is housed in a Pb-free, RoHS-compliant 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 for low-inductance, high-current surge path routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for all surge current; must be connected to solid ground plane via multiple vias to minimize inductance. |
| 4, 5, 6 | IN | Parallel-connected input terminals for protected line (e.g., VBUS or CC line); all three must be routed together to maximize IPP handling. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across 1–24A IPP range - eliminates design margin inflation needed with conventional TVS diodes. |
| FET-based shunt topology | Surge energy dissipated in low-RDS(on) channel instead of PN junction - improves reliability under repeated transients. |
| Low temperature drift | Clamping stable across –40°C to +125°C - enables consistent protection in battery-powered or thermally constrained enclosures. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against fast repetitive bursts common in motor drives and PLCs. |
Applications
| USB Type-C Power Delivery | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting the VBUS line of a USB Type-C port supporting up to 20V/5A power delivery in notebooks and docking stations. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at the connector to clamp lightning-induced surges before reaching the PD controller and buck-boost converter. Use Value: Maintains 7.5V clamping at 24A and 125°C - prevents overvoltage latch-up in USB PD controllers rated for ≤8V absolute maximum. |
Use Scenario: Safeguarding the input of an e-fuse or load switch (e.g., ON Semiconductor NIS513x) in remote metering or robotics systems exposed to field surges. IC Role / Device Role / Timing Role: Primary front-end protector that limits transient voltage across the load switch's internal FET drain-source terminals. Use Value: Prevents gate oxide rupture and avalanche failure in downstream load switches by holding clamping voltage well below their 12–15V VDSS rating. |
| IoT Sensor Hub Interface | Industrial USB 2.0 Host Port |
|
Use Scenario: Shielding 5V I/O lines connecting MCU GPIOs to external sensors or actuators in smart factory edge nodes. IC Role / Device Role / Timing Role: Bidirectional EOS protector on unidirectional or open-drain sensor bus lines (e.g., I²C pull-ups, GPIO wake inputs). Use Value: 175pF capacitance avoids signal rise-time degradation on 400kHz I²C buses; ±30kV ESD withstand prevents field failures during handling. |
Use Scenario: Hardening USB 2.0 upstream ports on programmable logic controllers (PLCs) and HMI panels against ESD from operator interaction. IC Role / Device Role / Timing Role: Line-level protector on D+ and D− differential pair, mounted adjacent to USB receptacle. Use Value: Enables compliance with IEC 61000-4-2 Level 4 (±15kV air) while preserving signal integrity - no additional series impedance required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SP1003-050 | TVS diode with 6.5V VBR, 12A IPP, 350pF capacitance - higher clamping slope and temperature sensitivity. | Limited to lower-energy environments; unsuitable for sustained 24A surges or high-temperature deployments. | Select when cost is primary constraint and surge exposure is limited to ESD-only (no lightning/EFT). |
| UCLAMP0571P.TCT | Same TDS architecture but 7V working voltage, 8.5V clamping at 24A, 120pF capacitance - optimized for 7V logic rails. | Better suited for 7V industrial I/O or CAN FD physical layer protection where tighter voltage margin is required. | Choose for designs needing lower capacitance and higher VRWM headroom than UCLAMP0544P.TCT allows. |
Compared with SP1003-050 and UCLAMP0571P.TCT, UCLAMP0544P.TCT uniquely balances 5V compatibility, 24A surge capability, and 7.5V flat clamping - making it optimal for USB PD VBUS protection where both voltage margin and thermal stability are critical.
Availability
UCLAMP0544P.TCT is available at Aetrix Electronics and suitable for USB Type-C power delivery, industrial load switch input protection, and IoT sensor interface applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for UCLAMP0544P.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 global supplier of analog and mixed-signal semiconductors focused on high-performance protection, sensing, and signal integrity solutions for communications, industrial, and consumer markets.
The UCLAMP0544P.TCT belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace conventional TVS diodes in high-reliability 5V interface protection where flat clamping, temperature stability, and surge endurance are mandatory.
FAQ
What is the maximum clamping voltage of UCLAMP0544P.TCT at 24A peak pulse current?
The UCLAMP0544P.TCT clamps at 7.5V when subjected to a 24A (8/20μs) surge per IEC 61000-4-5. This value is guaranteed across –40°C to +125°C and reflects the device's constant-clamp FET architecture - unlike TVS diodes, its clamping voltage does not increase with current or temperature. The 7.5V clamping ensures safe operation for 5V-tolerant USB PD controllers and load switches.
Can UCLAMP0544P.TCT be used to protect USB 3.1 Gen2 SuperSpeed differential pairs?
No, UCLAMP0544P.TCT is not suitable for USB 3.1 Gen2 (10 Gbps) differential signaling. Its 175pF junction capacitance introduces excessive signal attenuation and jitter on >5 GHz channels. For SuperSpeed lines, Semtech recommends ultra-low-capacitance devices like RClamp3371ZC (<0.25pF). UCLAMP0544P.TCT is intended for VBUS, CC, SBU, or USB 2.0 D+/D− lines where bandwidth demands are lower.
How does UCLAMP0544P.TCT differ from standard TVS diodes in surge response?
UCLAMP0544P.TCT uses a triggered FET shunt instead of a PN-junction avalanche structure. When a transient exceeds the trigger threshold, the FET turns on with <20mΩ RDS(on), yielding near-constant clamping voltage (7.5V) across 1–24A. Standard TVS diodes exhibit linear VC = VBR + IPP × RDYN behavior - their clamping rises with current and temperature. This makes UCLAMP0544P.TCT more predictable in high-stress industrial environments.
Is UCLAMP0544P.TCT compatible with lead-free reflow soldering profiles?
Yes, UCLAMP0544P.TCT is qualified for standard IPC/JEDEC J-STD-020 lead-free reflow profiles, including peak temperatures up to 260°C. Its DFN-6 package uses matte tin (Sn) lead finish and complies with RoHS and WEEE directives. The UL 94V-0 molding compound ensures thermal stability during repeated reflow cycles without delamination or marking degradation.
What PCB layout practices maximize surge performance for UCLAMP0544P.TCT?
To maximize surge performance, route all three IN pins (4,5,6) as a single low-inductance trace directly from the protected connector, and connect all three GND pins (1,2,3) to a solid ground plane using ≥4 thermal vias within 2mm of the pad. Place UCLAMP0544P.TCT within 3mm of the connector to minimize parasitic inductance. Avoid stubs, right-angle bends, or shared ground traces with noisy circuits.
UCLAMP0544P.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 10-UFDFN
- Series:
- uClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 12.5V
- Current - Peak Pulse (10/1000µs):
- 2A (8/20µs)
- Power - Peak Pulse:
- 25W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 10pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP2510P8
UCLAMP0544P.TCT FAQ
1.How can I place an order for UCLAMP0544P.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP0544P.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 UCLAMP0544P.TCT reliable?
The price and inventory of UCLAMP0544P.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP0544P.TCT is usually 5 days.
3.What payment methods are accepted for UCLAMP0544P.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP0544P.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP0544P.TCT?
UCLAMP0544P.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP0544P.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 UCLAMP0544P.TCT?
For technical support, including UCLAMP0544P.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP0544P.TCT requirements.
6.How does Aetrix verify that UCLAMP0544P.TCT is sourced from the original manufacturer or authorized distributors?
All UCLAMP0544P.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 UCLAMP0544P.TCT meets industry standards.
7.What is the process for return or replacement of UCLAMP0544P.TCT?
All UCLAMP0544P.TCT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP0544P.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 UCLAMP0544P.TCT part is unused and in its original packaging.
Return procedure for UCLAMP0544P.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP0544P.TCT Tags
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