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Semtech Corporation UCLAMP0505A.TCT
- Part No.:
- UCLAMP0505A.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SOT-563, SOT-666
- Datasheet:
-
UCLAMP0505A.TCT.pdf
- Description:
- TVS DIODE 5VWM 12VC SC89-6
- Quantity:
- Payment:
- Shipping:
Inventory:5,013
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Product details
Overview
UCLAMP0505A.TCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS/ESD protection of 5V I/O or power lines in USB, industrial, and IoT 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 1.6mm × 1.6mm DFN-6 package.
For engineers reviewing the UCLAMP0505A.TCT datasheet, pinout, applications, or equivalent options, this page provides verified electrical specs, thermal stability data, real-world USB Type-C and load switch protection use cases, and validated alternative parts with documented functional differences.
Technical Context
The UCLAMP0505A.TCT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant across 0–24A peak pulse current due to decreasing RDS(on) under surge conditions.
It features 175pF junction capacitance at 5V reverse bias, 130–600nA leakage at VRWM = 5V, and stable 7.5V clamping up to 125°C - enabling robust protection for high-speed 5V interfaces without signal integrity degradation or thermal derating concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 5 V - defines maximum continuous operating voltage before clamping activation; matches standard 5V USB, logic, and sensor rails. |
| Clamping Voltage (VC) | 7.5 V @ IPP = 24A - ensures protected ICs (e.g., USB transceivers, microcontrollers) remain below absolute maximum ratings during 8/20μs surges. |
| Peak Pulse Current (IPP) | 24 A (tp = 8/20μs) - supports compliance with IEC 61000-4-5 Level 3 (±1kV, RS = 42Ω) for industrial and automotive-grade inputs. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds Class 4 immunity requirements, eliminating need for secondary ESD stages in handheld and field-deployed devices. |
| Junction Capacitance (CJ) | 175 pF @ VR = 5V, 1MHz - low enough for USB 2.0 full-speed (12 Mbps) and industrial control lines; avoids signal rise-time degradation. |
| Dynamic Resistance (RDYN) | 20 mΩ - enables flat clamping behavior and minimizes voltage overshoot during fast transients, critical for protecting sensitive gate drivers and ADC inputs. |
| Operating Temperature | –40°C to +125°C - supports deployment in extended-temperature environments including motor drives, outdoor IoT nodes, and automotive body electronics. |
Pinout & Package
UCLAMP0505A.TCT is housed in a Pb-free, RoHS-compliant 1.6 mm × 1.6 mm × 0.55 mm DFN-6 package with exposed thermal pad (no solder mask defined). All pins are co-planar; marking dot indicates Pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Low-inductance ground return path; all three must be connected to solid ground plane via multiple vias to sustain 24A surge current without voltage bounce. |
| 4, 5, 6 | IN | Protected line input; pins tied together externally to minimize trace inductance; connects directly to connector or IC pin requiring EOS/ESD hardening. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient diversion | Replaces traditional TVS diodes with active shunt switching, delivering flat clamping independent of surge amplitude or temperature. |
| Constant clamping across temperature | 7.5V clamping maintained from –40°C to +125°C - eliminates thermal derating calculations required for silicon avalanche TVS devices. |
| Ultra-low dynamic resistance | 20 mΩ enables sub-100mV overshoot during 10A/μs dI/dt events - critical for protecting low-voltage logic and analog front-ends. |
| High-energy surge rating | 1120 W peak pulse power (8/20μs) - sustains repeated lightning-induced surges per IEC 61000-4-5 without parameter shift or failure. |
| Low leakage & capacitance | ≤600 nA IR at 5V and 175 pF CJ - preserves battery life in always-on IoT sensors and avoids signal distortion on 480 Mbps USB 2.0 lines. |
Applications
| USB Type-C Interface Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting VBUS and CC lines in USB Type-C ports supporting up to 5V/3A power delivery against ESD and cable discharge events. IC Role / Device Role / Timing Role: Primary EOS suppressor placed between connector and USB PD controller or multiplexer, clamping transients before they reach sensitive analog comparators or digital state machines. Use Value: Maintains 7.5V clamping at 125°C - prevents false overvoltage lockout in PD controllers where thermal margin is constrained by enclosure design. |
Use Scenario: Hardening the input of industrial-grade load switches (e.g., TPS229xx, AP22653) against lightning-induced surges in remote metering and factory automation systems. IC Role / Device Role / Timing Role: Front-end transient shunt that limits voltage across the load switch's internal MOSFET drain-source during 1.2/50μs surges, preventing avalanche breakdown or gate oxide damage. Use Value: 24A surge handling and 20mΩ RDYN ensure <100mV voltage rise across UCLAMP0505A.TCT during fast-rising transients - keeping stress on downstream FET well within SOA limits. |
| IoT Sensor Node Power Rail Protection | Embedded Controller I/O Line Hardening |
|
Use Scenario: Securing 5V power rails feeding wireless SoCs (e.g., ESP32, nRF52840) and environmental sensors in battery-powered edge devices deployed outdoors or near EMI sources. IC Role / Device Role / Timing Role: Standalone rail clamp on main 5V supply, absorbing energy from electrostatic discharge and conducted noise coupled through long sensor cables or unshielded enclosures. Use Value: 130–600nA leakage at 5V ensures minimal impact on multi-year battery life; 175pF capacitance avoids resonance with typical 10μF bulk capacitors. |
Use Scenario: Protecting GPIO, UART, and I²C lines of microcontrollers (e.g., STM32G0, PIC18F) in industrial HMI panels and programmable logic controllers subject to operator ESD and relay coil flyback. IC Role / Device Role / Timing Role: Point-of-use transient suppressor mounted directly at MCU pin, minimizing PCB trace inductance to preserve clamping speed and effectiveness. Use Value: ±30kV ESD rating meets IEC 61000-4-2 Level 4 without external spark gaps; flat 7.5V clamping prevents latch-up or permanent gate damage in 5V-tolerant I/O cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD4E05U06DQAR | TVS diode array; 5.5V VRWM, 14V VC @ 1A; higher clamping (14V vs. 7.5V), no FET-based flat response. | Lower surge rating (4A IPP); suitable only for ESD-only zones, not combined ESD/EFT/lightning environments. | Select when cost sensitivity outweighs clamping performance and thermal stability requirements. |
| SMAJ5.0A | Unidirectional 5V TVS; 9.2V VC @ 24A; 10× higher dynamic resistance (~200mΩ); clamping rises with temperature and current. | Larger SMA package (4.5mm × 3.2mm); unsuitable for space-constrained USB-C or miniaturized IoT designs. | Choose only if legacy board layout prohibits DFN-6 footprint change and thermal derating is acceptable. |
Compared with TPD4E05U06DQAR and SMAJ5.0A, UCLAMP0505A.TCT provides lower clamping voltage, superior thermal stability, and smaller footprint - making it optimal for next-generation 5V interfaces where reliability under extended temperature and high-surge conditions is non-negotiable.
Availability
UCLAMP0505A.TCT is available at Aetrix Electronics and suitable for USB Type-C port hardening, industrial load switch protection, and IoT sensor node power rail safeguarding requiring stable component supply across multi-year production cycles.
Supply support for UCLAMP0505A.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 sensing, protection, and connectivity.
The UCLAMP series belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes with FET-based active clamping for flat, temperature-stable surge protection in high-reliability 3.3V–24V systems.
FAQ
What is the maximum continuous operating voltage for UCLAMP0505A.TCT?
The UCLAMP0505A.TCT has a reverse stand-off voltage (VRWM) of 5 V, meaning it can safely operate continuously at up to 5 V without triggering clamping. This makes UCLAMP0505A.TCT ideal for standard 5V USB, microcontroller I/O, and industrial logic rails where sustained voltage must remain below the device's threshold to avoid leakage or premature conduction.
How does UCLAMP0505A.TCT achieve flat clamping voltage across temperature?
UCLAMP0505A.TCT achieves flat clamping by using a precision-triggered surge-rated FET instead of a PN-junction diode. When an overvoltage event occurs, the trigger circuit activates the FET's low-RDS(on) channel, resulting in clamping dominated by the fixed trigger voltage-not junction characteristics. That's why UCLAMP0505A.TCT maintains 7.5V clamping from –40°C to +125°C, unlike TVS diodes whose VC rises with temperature.
Can UCLAMP0505A.TCT protect USB 2.0 high-speed signals?
No-UCLAMP0505A.TCT is not intended for direct placement on USB 2.0 differential data lines (D+/D−) due to its 175 pF junction capacitance, which would distort 480 Mbps signaling. However, UCLAMP0505A.TCT is explicitly qualified for USB Type-C VBUS and CC line protection, where bandwidth demands are lower and robust 5V rail clamping is essential.
What is the recommended PCB layout for UCLAMP0505A.TCT?
Place UCLAMP0505A.TCT as close as possible to the protected connector or IC pin. Connect all three GND pins (1, 2, 3) to a solid ground plane using ≥3 thermal vias; tie all three IN pins (4, 5, 6) together with a short, wide trace. Avoid stubs or routing beneath the device. This layout minimizes parasitic inductance and ensures UCLAMP0505A.TCT delivers full 24A surge capability without voltage overshoot.
Is UCLAMP0505A.TCT RoHS and REACH compliant?
Yes-UCLAMP0505A.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 lead-free matte tin plating and UL 94V-0 molding compound, meeting global environmental and safety standards for industrial and consumer electronics manufacturing.
UCLAMP0505A.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:
- 5
- 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)
UCLAMP0505A.TCT FAQ
1.How can I place an order for UCLAMP0505A.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP0505A.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 UCLAMP0505A.TCT reliable?
The price and inventory of UCLAMP0505A.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP0505A.TCT is usually 5 days.
3.What payment methods are accepted for UCLAMP0505A.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP0505A.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP0505A.TCT?
UCLAMP0505A.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP0505A.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 UCLAMP0505A.TCT?
For technical support, including UCLAMP0505A.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP0505A.TCT requirements.
6.How does Aetrix verify that UCLAMP0505A.TCT is sourced from the original manufacturer or authorized distributors?
All UCLAMP0505A.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 UCLAMP0505A.TCT meets industry standards.
7.What is the process for return or replacement of UCLAMP0505A.TCT?
All UCLAMP0505A.TCT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP0505A.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 UCLAMP0505A.TCT part is unused and in its original packaging.
Return procedure for UCLAMP0505A.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP0505A.TCT Tags
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