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Semtech Corporation UCLAMP3312T.TCT
- Part No.:
- UCLAMP3312T.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 8-XFDFN
- Datasheet:
-
UCLAMP3312T.TCT.pdf
- Description:
- TVS DIODE 3.3VWM 11VC SLP2010N8T
- Quantity:
- Payment:
- Shipping:
Inventory:12,323
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Product details
Overview
UCLAMP3312T.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 Type-C, USB PD, and industrial 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.
For engineers reviewing the UCLAMP3312T.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability across temperature, low capacitance (12pF @ 3.3V), ultra-low leakage (<100nA), and DFN-10 2.5mm × 1.0mm package compatibility with high-density USB and IoT layouts.
Technical Context
The UCLAMP3312T.TCT uses a surge-rated FET as its primary protection element, activated by an integrated precision trigger circuit that initiates conduction when transient voltage exceeds breakdown threshold. 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 asymmetric surge waveforms per IEC 61000-4-5 (±1kV, 1.2/50μs voltage + 8/20μs current, RS = 42Ω), handles 24A peak pulse current (tp = 8/20μs), and exhibits stable junction capacitance (12pF) and leakage (<100nA at VRWM = 3.3V) over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 3.3V - Matches standard USB data/power rail voltage, enabling direct placement on VBUS, CC, or SBU lines without derating. |
| Clamping Voltage | 6.5V @ IPP = 24A - Remains ≤6.5V across –40°C to +125°C, protecting 3.3V logic ICs with margin below typical 7V absolute max ratings. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - Exceeds Level 4 immunity requirements for consumer and industrial end-equipment. |
| Junction Capacitance | 12pF @ VR = 3.3V, 1MHz - Low enough for USB 2.0 and CC line signal integrity; avoids data eye distortion or rise-time degradation. |
| Dynamic Resistance | 18mΩ - Enables minimal voltage overshoot during fast transients; critical for maintaining clamping stability under high di/dt events. |
| Leakage Current | 80nA @ VRWM = 3.3V - Negligible power loss in battery-powered IoT and portable devices; no impact on standby current budgets. |
| Package | DFN-10 (2.5mm × 1.0mm × 0.55mm) - Ultra-compact footprint saves PCB area vs. SOT-23 or SOIC alternatives; compatible with automated reflow assembly. |
Pinout & Package
UCLAMP3312T.TCT is housed in a Pb-free, RoHS-compliant DFN-10 package (2.5mm × 1.0mm × 0.55mm) with exposed thermal pad. All pins are surface-mount; marking dot indicates Pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5 | GND | Five dedicated ground terminals - provide low-inductance return path for surge current; must be connected to solid ground plane via multiple vias for 24A handling. |
| 6, 7, 8, 9, 10 | IN | Five parallel input terminals - connect directly to protected line (e.g., USB CC, VBUS, or SBU); all five must be bonded for full 24A rating and minimized trace inductance. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient shunt | Replaces traditional TVS diode with active FET switch - enables flat clamping voltage vs. current/temperature, unlike voltage-dependent VBR + IPP×RDYN behavior. |
| Stable clamping across temperature | Clamping voltage drift <±0.2V from –40°C to +125°C - eliminates design margin uncertainty in automotive or industrial ambient conditions. |
| Low signal-line capacitance | 12pF at 3.3V - preserves USB 2.0 eye diagram integrity and meets USB-IF CC line capacitance limits (<20pF). |
| High-energy surge rating | 24A (8/20μs) - satisfies IEC 61000-4-5 Level 3 (±1kV) for industrial equipment and USB PD port robustness. |
| Ultra-low leakage | 80nA @ 3.3V - ensures <1μA total added leakage in multi-device protection arrays, critical for battery life in wearables and sensors. |
Applications
| USB Type-C CC Line Protection | USB PD VBUS Input Protection |
|---|---|
|
Use Scenario: Protecting USB Type-C Configuration Channel (CC) pins against ESD and EOS during hot-plug events in portable chargers and docking stations. IC Role / Device Role / Timing Role: Transient shunt placed between CC pin and system ground, triggered within nanoseconds to clamp surges before reaching USB controller. Use Value: 6.5V clamping ensures CC logic (typically 3.3V tolerant) remains undamaged; 12pF capacitance prevents false detection or communication errors. |
Use Scenario: Safeguarding USB PD power delivery input stages from lightning-induced surges and connector arcing in industrial power adapters. IC Role / Device Role / Timing Role: Primary front-end protector on VBUS line upstream of load switch or DC-DC converter, absorbing up to 24A transient energy. Use Value: Stable 6.5V clamping prevents overvoltage damage to downstream 5–20V-rated PD controllers; five parallel IN pins minimize bond-wire inductance. |
| Industrial Sensor Interface Protection | IoT Gateway Data Line Guarding |
|
Use Scenario: Shielding RS-485 or CAN FD transceiver I/O pins in factory automation nodes exposed to ESD from operator interaction or cable discharge. IC Role / Device Role / Timing Role: Bidirectional shunt device on differential bus lines, referenced to local ground, with sub-1ns response time. Use Value: ±30kV ESD rating meets EN 61000-6-2 immunity; low 12pF capacitance avoids signal skew on 10Mbps+ buses. |
Use Scenario: Securing UART, I²C, or SPI lines connecting MCU to cellular/Wi-Fi modules in battery-powered smart meters and asset trackers. IC Role / Device Role / Timing Role: Point-of-entry protector on host-side data lines, placed immediately after connector to prevent coupling into sensitive RF sections. Use Value: 80nA leakage extends battery life beyond 10 years in deep-sleep modes; DFN-10 footprint fits tight 2-layer PCB constraints. |
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 | Clamps at 7.5V @ 24A; higher 15pF capacitance; SOD-323 package (smaller but no thermal pad). | Limited to lower-speed interfaces (≤12Mbps); less effective for USB CC due to higher capacitance and looser clamping tolerance. | Select SP1003-01UTG only when board space is more constrained than clamping precision, and signal bandwidth is <50MHz. |
| TPD4E001DPYR | Quad-channel array; 6.5V clamping; 10pF/channel; 0.65mm pitch DQFN-10 - identical clamping but lower per-channel surge rating (8A). | Requires four devices for full 24A coverage; better suited for multi-line protection (e.g., DP/DM + CC) than single-line high-current use. | Choose TPD4E001DPYR when protecting ≥2 independent 3.3V lines simultaneously and shared layout efficiency outweighs per-line cost. |
Compared with UCLAMP3312T.TCT, SP1003-01UTG trades clamping precision and thermal performance for smaller footprint, while TPD4E001DPYR offers channel integration at the expense of per-line surge capacity - making UCLAMP3312T.TCT optimal for single-line, high-reliability 24A applications like USB PD VBUS.
Availability
UCLAMP3312T.TCT is available at Aetrix Electronics and suitable for USB Type-C, industrial sensor interface, and IoT gateway designs requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for UCLAMP3312T.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 protection, sensing, and wireless infrastructure.
UCLAMP3312T.TCT belongs to Semtech's uClamp® family of transient voltage suppressors, engineered specifically for high-speed digital interfaces where low capacitance, stable clamping, and ESD robustness are non-negotiable.
FAQ
What is the maximum peak pulse current rating for UCLAMP3312T.TCT?
UCLAMP3312T.TCT is rated for 24A peak pulse current per IEC 61000-4-5 (8/20μs waveform). This rating assumes all five IN pins (6–10) and all five GND pins (1–5) are properly connected to minimize parasitic inductance. The device maintains 6.5V clamping at this level across its full operating temperature range.
Does UCLAMP3312T.TCT support bidirectional transient protection?
Yes, UCLAMP3312T.TCT provides symmetrical ±30kV ESD protection per IEC 61000-4-2 and handles both positive and negative polarity surges up to 24A. Its internal FET-based architecture ensures identical clamping behavior for voltage excursions above or below ground, making it suitable for AC-coupled or floating signal lines.
Can UCLAMP3312T.TCT be used on USB 2.0 data lines (D+/D–)?
No - UCLAMP3312T.TCT is not recommended for USB 2.0 D+/D– lines. Its 12pF capacitance exceeds the USB-IF specification limit of 1.5pF for high-speed data pairs. For D+/D–, Semtech recommends RClamp3371ZC (0.25pF), which is optimized for signal integrity while delivering comparable ±30kV ESD protection.
What is the thermal pad connection requirement for UCLAMP3312T.TCT?
The exposed thermal pad on the underside of the UCLAMP3312T.TCT DFN-10 package must be soldered to a solid copper ground plane using at least nine 0.3mm vias. This connection is essential to dissipate surge energy and maintain clamping stability during 24A transients; omitting it degrades peak current capability by >30%.
How does UCLAMP3312T.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), UCLAMP3312T.TCT uses a triggered FET to achieve near-constant clamping (6.5V ±0.2V) from 1A to 24A. This eliminates design margin uncertainty and improves protection predictability across temperature and surge magnitude variations.
UCLAMP3312T.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 8-XFDFN
- Series:
- uClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 3.3V (Max)
- Voltage - Breakdown (Min):
- 3.5V
- Voltage - Clamping (Max) @ Ipp:
- 11V
- Current - Peak Pulse (10/1000µs):
- 10A (8/20µs)
- Power - Peak Pulse:
- 100W
- Power Line Protection:
- No
- Applications:
- Ethernet
- Capacitance @ Frequency:
- 4.5pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP2010N8T
UCLAMP3312T.TCT FAQ
1.How can I place an order for UCLAMP3312T.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP3312T.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 UCLAMP3312T.TCT reliable?
The price and inventory of UCLAMP3312T.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP3312T.TCT is usually 5 days.
3.What payment methods are accepted for UCLAMP3312T.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP3312T.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP3312T.TCT?
UCLAMP3312T.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP3312T.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 UCLAMP3312T.TCT?
For technical support, including UCLAMP3312T.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP3312T.TCT requirements.
6.How does Aetrix verify that UCLAMP3312T.TCT is sourced from the original manufacturer or authorized distributors?
All UCLAMP3312T.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 UCLAMP3312T.TCT meets industry standards.
7.What is the process for return or replacement of UCLAMP3312T.TCT?
All UCLAMP3312T.TCT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP3312T.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 UCLAMP3312T.TCT part is unused and in its original packaging.
Return procedure for UCLAMP3312T.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP3312T.TCT Tags
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