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Semtech Corporation UCLAMP0504A.TCT
- Part No.:
- UCLAMP0504A.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SOT-563, SOT-666
- Datasheet:
-
UCLAMP0504A.TCT.pdf
- Description:
- TVS DIODE 5VWM 12VC SC89-6
- Quantity:
- Payment:
- Shipping:
Inventory:21,186
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Product details
Overview
UCLAMP0504A.TCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS 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 UCLAMP0504A.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 trade-offs.
Technical Context
The UCLAMP0504A.TCT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that initiates conduction when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant across the full rated peak pulse current range due to decreasing RDS(on) under surge conditions.
It supports unsymmetrical line protection per IEC 61000-4-5 with ±1kV (1.2/50μs, RS = 42Ω) and handles 24A (8/20μs) with 7.5V clamping. Its 175pF junction capacitance at 5V reverse bias and 130nA leakage at VRWM make it suitable for high-speed data line protection without signal integrity degradation.
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 - stays below 8.5V damage threshold of most 5V USB PD controllers and transceivers. |
| ESD Withstand | ±30kV contact/air (IEC 61000-4-2) - exceeds Level 4 immunity requirements for consumer and industrial end equipment. |
| Peak Pulse Current | 24A (8/20μs) - meets IEC 61000-4-5 surge immunity for industrial port-level protection. |
| Junction Capacitance | 175pF @ 5V - low enough to avoid signal distortion on USB 2.0 differential pairs and GPIO lines. |
| Dynamic Resistance | 20mΩ - enables stable clamping independent of surge amplitude, critical for consistent protection margin. |
| Operating Temperature | –40°C to +125°C - supports deployment in automotive cabin modules and industrial edge gateways. |
Pinout & Package
UCLAMP0504A.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 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 paths; must be connected to solid ground plane via multiple vias to minimize parasitic inductance. |
| 4, 5, 6 | IN | Parallel-connected input terminals for protected line; all three pins must be routed together to ensure balanced current sharing and full 24A rating. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient diversion | Replaces traditional TVS diodes with active shunt switching, delivering flat clamping voltage across temperature and current range. |
| Low clamping voltage drift | Clamps at 7.5V ±0.5V from –40°C to +125°C - eliminates thermal derating calculations required for silicon TVS devices. |
| High EFT immunity | Withstands ±4kV burst noise (IEC 61000-4-4, 5/50ns) - protects against repetitive switching transients in motor drives and PLC I/O modules. |
| Space-optimized layout | 1.6 × 1.6 mm footprint saves >60% board area vs. discrete TVS + RC snubber solutions for same 24A rating. |
| Lead-free & halogen-free | Pb-free solderable terminations and UL 94V-0 flammability rating meet IPC-J-STD-020 and RoHS/WEEE compliance mandates. |
Applications
| USB Type-C Power Delivery | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting VBUS and CC lines in USB-C receptacles handling up to 20V/5A power delivery. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector entry point to clamp lightning-induced surges before reaching PD controller IC. Use Value: Maintains 7.5V clamping at 24A and 125°C - prevents latch-up or gate oxide rupture in USB PD controllers such as TUSB73x or STUSB4500. |
Use Scenario: Safeguarding input stage of industrial-grade load switches (e.g., ON Semi NIS5132, TI TPS229xx) exposed to field wiring transients. IC Role / Device Role / Timing Role: Primary overvoltage protector on VIN rail, absorbing energy from inductive kickback and induced surges before internal FET breakdown. Use Value: Limits voltage across load switch drain-source to <8V during 24A surge - avoids destructive avalanche failure and extends system MTBF in remote metering nodes. |
| IoT Sensor Hub Interface | Tablet/Notebook Battery Charging Circuit |
|
Use Scenario: Shielding UART, I²C, and GPIO lines connecting MCU to external environmental sensors in battery-powered edge nodes. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on bidirectional 3.3V/5V signal lines subject to human-body-model ESD events during field servicing. Use Value: 175pF capacitance ensures <1% signal rise-time degradation on 10Mbps UART links - preserves timing margins without added series resistance. |
Use Scenario: Securing input to buck-boost charging ICs (e.g., BQ25792, MP2722) in portable computing devices where VBUS may experience hot-plug transients. IC Role / Device Role / Timing Role: Front-end surge limiter on main power input rail, coordinating with internal OVP and thermal shutdown circuits. Use Value: Enables reliable operation under repeated ±1kV (IEC 61000-4-5) surges - reduces field returns due to charger IC damage in high-volume OEM production. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A | Standard unidirectional TVS diode; 5.0V VRWM, 14.4V VC @ 24A, 600pF capacitance. | Higher clamping voltage and capacitance limit use to non-high-speed DC rails only. | Select SMAJ5.0A only for cost-sensitive, low-frequency power rail protection where 14.4V clamping is acceptable. |
| TPD4E05B6DQAR | Quad-channel 5V ESD array; 5.5V VRWM, 12V VC @ 4A, 0.5pF per channel. | Rated for 4A only - insufficient for IEC 61000-4-5 surge; optimized for HBM/CDM ESD, not EOS. | Choose TPD4E05B6DQAR for USB 2.0 data line ESD hardening; pair with UCLAMP0504A.TCT for combined ESD + surge coverage on VBUS. |
Compared with SMAJ5.0A and TPD4E05B6DQAR, UCLAMP0504A.TCT uniquely delivers 24A surge capability with 7.5V clamping and 175pF capacitance - enabling single-device protection of both power and high-speed signal paths in space-constrained USB PD designs.
Availability
UCLAMP0504A.TCT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, IoT sensor hubs, tablet battery charging circuits, and USB PD controller protection requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for UCLAMP0504A.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 analog and mixed-signal ICs for precision sensing, power management, and transient protection.
The UCLAMP0504A.TCT belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace conventional TVS diodes in high-reliability applications demanding flat clamping, wide temperature stability, and compact form factor.
FAQ
What is the maximum peak pulse current rating for UCLAMP0504A.TCT?
The UCLAMP0504A.TCT is rated for 24A peak pulse current per IEC 61000-4-5 (8/20μs waveform). This value is validated across the full operating temperature range (–40°C to +125°C) and reflects the device's ability to safely divert surge energy without parametric shift or failure. UCLAMP0504A.TCT achieves this using a low-RDS(on) FET architecture rather than junction-limited avalanche conduction.
Does UCLAMP0504A.TCT support bidirectional or unidirectional transient protection?
UCLAMP0504A.TCT provides unidirectional protection with a 5V working voltage (VRWM) and 7.5V clamping voltage (VC). It is designed for positive-going transients on grounded systems - typical for VBUS, power rails, and I/O lines referenced to GND. UCLAMP0504A.TCT does not conduct under reverse bias beyond its specified leakage, making it unsuitable for AC-coupled or floating-bus applications without additional circuitry.
How does UCLAMP0504A.TCT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), UCLAMP0504A.TCT maintains near-constant 7.5V clamping from 1A to 24A due to its FET-based shunt architecture. This eliminates thermal derating at elevated ambient temperatures and ensures predictable protection margins in USB PD and industrial environments where UCLAMP0504A.TCT is deployed.
Can UCLAMP0504A.TCT be used on high-speed data lines like USB 2.0 differential pairs?
UCLAMP0504A.TCT has 175pF junction capacitance at 5V reverse bias - too high for direct placement on USB 2.0 D+/D– lines, which require <1.5pF to avoid signal integrity loss. However, UCLAMP0504A.TCT is appropriate for protecting associated 5V VBUS, CC, and SBU lines in the same USB-C connector. For data lines, Semtech recommends pairing UCLAMP0504A.TCT with ultra-low-capacitance devices like RClamp3371ZC.
What PCB layout practices maximize surge performance of UCLAMP0504A.TCT?
To maximize surge performance, route all three IN pins (4, 5, 6) together in a single short, wide trace to the protected line, and connect all three GND pins (1, 2, 3) directly to a solid ground plane using ≥4 thermal vias. Place UCLAMP0504A.TCT within 3 mm of the connector entry point to minimize inductance. Avoid stubs, right-angle bends, or split ground planes beneath the device - these practices are validated in Semtech's AN-1107 layout guide for UCLAMP0504A.TCT.
UCLAMP0504A.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- SOT-563, SOT-666
- 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:
- 12V
- Current - Peak Pulse (10/1000µs):
- 7A (8/20µs)
- Power - Peak Pulse:
- 100W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 60pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-89 (SOT-666)
UCLAMP0504A.TCT FAQ
1.How can I place an order for UCLAMP0504A.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP0504A.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 UCLAMP0504A.TCT reliable?
The price and inventory of UCLAMP0504A.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP0504A.TCT is usually 5 days.
3.What payment methods are accepted for UCLAMP0504A.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP0504A.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP0504A.TCT?
UCLAMP0504A.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP0504A.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 UCLAMP0504A.TCT?
For technical support, including UCLAMP0504A.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP0504A.TCT requirements.
6.How does Aetrix verify that UCLAMP0504A.TCT is sourced from the original manufacturer or authorized distributors?
All UCLAMP0504A.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 UCLAMP0504A.TCT meets industry standards.
7.What is the process for return or replacement of UCLAMP0504A.TCT?
All UCLAMP0504A.TCT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP0504A.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 UCLAMP0504A.TCT part is unused and in its original packaging.
Return procedure for UCLAMP0504A.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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