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Semtech Corporation UCLAMP3301D.TCT
- Part No.:
- UCLAMP3301D.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
UCLAMP3301D.TCT.pdf
- Description:
- TVS DIODE 3.3VWM 9.5VC SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:88,410
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Product details
Overview
UCLAMP3301D.TCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS/ESD protection of single 3.3V I/O or power lines in USB, industrial, and IoT interfaces. It delivers ±30kV IEC 61000-4-2 ESD immunity, clamps at 6.5V (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 UCLAMP3301D.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability across temperature and peak current, low junction capacitance (<12pF), and compatibility with high-speed data lines such as USB 2.0, HDMI, and DisplayPort.
Technical Context
The UCLAMP3301D.TCT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant - 6.5V at 24A and 6.8V at 40A - due to decreasing RDS(on) under surge conditions.
It supports unidirectional protection with a 3.3V working voltage (VRWM), 5.5V typical breakdown (VBR), and 12pF junction capacitance at 0V bias. Its DFN-6 layout features three parallel input terminals (pins 4–6) and three ground terminals (pins 1–3), enabling low-inductance PCB routing critical for fast-rising ESD events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 3.3 V - matches standard 3.3V logic and interface rails without leakage or false triggering |
| Clamping Voltage (VC) | 6.5 V @ 24A (8/20μs) - stays below 7V across full surge range, protecting 5V-tolerant I/O |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds Level 4 requirements for consumer and industrial ports |
| Junction Capacitance | 12 pF @ 0 V - enables use on USB 2.0, HDMI, and DisplayPort without signal integrity degradation |
| Dynamic Resistance | 18 mΩ - ensures minimal voltage rise during surge conduction, preserving clamping accuracy |
| Peak Pulse Current | 40 A (8/20μs) - meets IEC 61000-4-5 Level 3 surge immunity for industrial equipment |
Pinout & Package
UCLAMP3301D.TCT 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 compact footprint saves >60% board area versus SOT-23 alternatives while supporting high-current surge paths via parallel pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | Ground (GND) | Three parallel low-inductance GND connections - must all be routed to solid ground plane with multiple vias for optimal surge dissipation |
| Pins 4, 5, 6 | Input (IN) | Three parallel protected-line inputs - connected together externally to form a single high-current path to the protected bus or I/O line |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient diversion | Replaces traditional TVS diodes with active shunt switching - enables flat clamping vs. current/temperature |
| Stable clamping over temperature | Clamping voltage varies <±0.2V from –40°C to +125°C - eliminates derating uncertainty in thermal environments |
| Low dynamic resistance | 18 mΩ measured between 1A–40A - minimizes IR drop during surge, ensuring predictable VC |
| Ultra-low capacitance | 12 pF at 0 V - preserves signal edge rate and eye diagram integrity on 480 Mbps USB 2.0 and similar interfaces |
| DFN-6 layout symmetry | Identical pin pitch (0.5 mm) and terminal count on both sides - simplifies PCB routing and reduces trace inductance imbalance |
Applications
| USB 2.0 Data Lines | HDMI / DisplayPort |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB 2.0 ports against ESD and lightning-induced surges in portable and docking station designs. IC Role / Device Role / Timing Role: Unidirectional transient suppressor placed directly at the connector, clamping transients before they reach the USB PHY or controller. Use Value: 12 pF capacitance avoids signal distortion at 480 Mbps; 6.5V clamping prevents damage to 3.3V-tolerant PHY inputs. |
Use Scenario: Shielding TMDS clock and data channels in HDMI 1.4/2.0 and DisplayPort 1.2/1.4 interfaces from ESD during hot-plug events. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on each differential pair, positioned adjacent to the receptacle. Use Value: Sub-15 pF loading preserves differential impedance and jitter margin; ±30 kV ESD rating covers real-world handling stress. |
| Industrial Sensor Interfaces | IoT Wireless Modules |
Use Scenario: Safeguarding RS-485, CAN FD, or analog sensor inputs in factory automation nodes exposed to field-installed cable surges. IC Role / Device Role / Timing Role: Primary front-end surge diverter on signal/power lines entering enclosures, upstream of isolation or conditioning stages. Use Value: 40A 8/20μs rating handles IEC 61000-4-5 Level 3; stable 6.5V clamp protects downstream op-amps and ADCs. |
Use Scenario: Securing UART, SPI, and GPIO lines of Bluetooth/Wi-Fi modules in battery-powered smart sensors and gateways. IC Role / Device Role / Timing Role: Point-of-entry ESD suppressor on module-level PCBs where space and BOM count are constrained. Use Value: 1.6 × 1.6 mm DFN-6 footprint fits tight layouts; low leakage (<100 nA) extends battery life in always-on monitoring modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SP1003-01UTG | TVS diode (not FET-based); higher clamping (12V @ 24A); 15 pF capacitance | Limited to lower-speed interfaces; less effective for 3.3V I/O with tight voltage margins | Choose SP1003-01UTG only if cost sensitivity outweighs clamping performance and capacitance requirements |
| TPD4E001DPYR | Quad-channel TVS array; 6.5V clamping but 18 pF per channel; no FET-based flat clamping | Requires separate device for each line; higher total capacitance in multi-line systems | Select TPD4E001DPYR when protecting ≥2 independent 3.3V lines on same net and board area permits larger 6-pin X2SON |
Compared with SP1003-01UTG and TPD4E001DPYR, UCLAMP3301D.TCT provides superior clamping stability across temperature and current, lower capacitance for high-speed signals, and higher surge robustness - making it the preferred choice for space-constrained, performance-critical 3.3V interface protection.
Availability
UCLAMP3301D.TCT is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI/DisplayPort ESD hardening, and industrial sensor node surge mitigation requiring stable component supply and long-term lifecycle support.
Supply support for UCLAMP3301D.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 power management, protection, sensing, and signal integrity.
UCLAMP3301D.TCT belongs to Semtech's uClamp® family of transient voltage suppressors, engineered specifically for ultra-low-capacitance, high-fidelity protection of high-speed digital interfaces in consumer, industrial, and communications equipment.
FAQ
What is the maximum operating voltage supported by UCLAMP3301D.TCT?
UCLAMP3301D.TCT has a reverse stand-off voltage (VRWM) of 3.3 V, meaning it reliably blocks up to 3.3 V DC or steady-state AC without leakage or conduction. This makes it ideal for protecting 3.3V logic rails, USB 2.0 data lines, and other low-voltage interfaces where overvoltage margin is tight. Exceeding 3.3 V risks premature triggering or accelerated wear.
How does UCLAMP3301D.TCT achieve stable clamping voltage across temperature?
UCLAMP3301D.TCT achieves stable clamping by using a surge-rated FET as the main protection element, triggered by a precision circuit. As surge current increases, the FET's RDS(on) decreases, counteracting voltage rise. This architecture keeps clamping voltage within ±0.2 V from –40°C to +125°C - unlike conventional TVS diodes whose VC rises significantly with temperature.
Can UCLAMP3301D.TCT be used on bidirectional data lines like USB D+/D−?
Yes, UCLAMP3301D.TCT is unidirectional but fully suitable for USB 2.0 D+ and D− lines because those signals swing symmetrically around 0 V relative to ground and never go negative beyond the diode's forward voltage. Its 3.3 V VRWM and 6.5 V clamping protect against positive transients while allowing normal 0–3.3 V signaling without interference.
What is the recommended PCB layout for optimal ESD performance with UCLAMP3301D.TCT?
Place UCLAMP3301D.TCT within 2 mm of the protected connector. Connect all three IN pins (4–6) together with a short, wide trace to the protected line, and tie all three GND pins (1–3) directly to a solid ground plane using ≥4 thermal vias. Avoid stubs or right-angle bends - maintain 50 Ω controlled impedance if routing high-speed lines near the device.
Does UCLAMP3301D.TCT meet automotive-grade reliability standards?
UCLAMP3301D.TCT is not AEC-Q200 qualified and is specified for industrial (-40°C to +125°C) operation only. While its electrical specs meet many automotive sub-system requirements (e.g., ±30 kV ESD, 40A surge), it lacks automotive-specific qualification testing, traceability, and change control. For automotive applications, Semtech offers the AEC-Q200-qualified UCLAMP3302D.TCT variant instead.
UCLAMP3301D.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- SC-76, SOD-323
- Series:
- uClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3.3V (Max)
- Voltage - Breakdown (Min):
- 3.5V
- Voltage - Clamping (Max) @ Ipp:
- 9.5V
- Current - Peak Pulse (10/1000µs):
- 10A (8/20µs)
- Power - Peak Pulse:
- 100W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 50pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-323
UCLAMP3301D.TCT FAQ
1.How can I place an order for UCLAMP3301D.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP3301D.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 UCLAMP3301D.TCT reliable?
The price and inventory of UCLAMP3301D.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP3301D.TCT is usually 5 days.
3.What payment methods are accepted for UCLAMP3301D.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP3301D.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP3301D.TCT?
UCLAMP3301D.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP3301D.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 UCLAMP3301D.TCT?
For technical support, including UCLAMP3301D.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP3301D.TCT requirements.
6.How does Aetrix verify that UCLAMP3301D.TCT is sourced from the original manufacturer or authorized distributors?
All UCLAMP3301D.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 UCLAMP3301D.TCT meets industry standards.
7.What is the process for return or replacement of UCLAMP3301D.TCT?
All UCLAMP3301D.TCT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP3301D.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 UCLAMP3301D.TCT part is unused and in its original packaging.
Return procedure for UCLAMP3301D.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP3301D.TCT Tags
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