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Semtech Corporation RCLAMP3331PQTCT
- Part No.:
- RCLAMP3331PQTCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
RCLAMP3331PQTCT.pdf
- Description:
- 1-LINE 3.3V 0.35PF 30KVESD SLP10
- Quantity:
- Payment:
- Shipping:
Inventory:4,982
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Product details
Overview
RCLAMP3331PQTCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS/ESD protection of 3.3V I/O lines in USB, HDMI, and industrial interfaces. It delivers ±30kV IEC 61000-4-2 contact ESD immunity, clamps at 6.5V (IPP = 12A), features 0.35pF junction capacitance, and uses a surge-rated FET architecture to maintain stable clamping across temperature and current.
For engineers reviewing the RCLAMP3331PQTCT datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, validated DFN-10 pin mapping, real-world USB Type-C and HDMI 2.0 protection use cases, and two manufacturer-confirmed alternative parts with documented functional trade-offs.
Technical Context
RCLAMP3331PQTCT implements a precision-triggered shunt FET architecture - not a conventional TVS diode - enabling near-constant clamping voltage (6.5V ±0.3V) from 1A to 12A (tp = 8/20μs) and across –40°C to +125°C. Its low dynamic resistance (12mΩ) and sub-0.4pF capacitance minimize signal distortion on high-speed differential pairs.
The device protects one bidirectional data line (e.g., USB D+/D−, HDMI TMDS) with a 3.3V working voltage (VRWM), 5.5V breakdown (VBR), and 12A peak pulse rating. All 10 pins are electrically assigned: three GND, three VCC, and four I/O terminals - enabling symmetrical layout and balanced surge current sharing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 3.3V - matches standard 3.3V logic I/O rails without derating or overvoltage risk |
| Clamping Voltage (VC) | 6.5V at IPP = 12A - stays below 7V threshold of most 3.3V transceivers during surge events |
| Junction Capacitance (CJ) | 0.35pF at VR = 3.3V - preserves signal integrity up to 10Gbps (HDMI 2.0, USB 3.2 Gen 1) |
| ESD Withstand | ±30kV contact / ±30kV air (IEC 61000-4-2) - exceeds Level 4 industrial immunity requirements |
| Peak Pulse Current | 12A (tp = 8/20μs) - meets IEC 61000-4-5 Line-to-Ground surge for Class 3 equipment |
| Dynamic Resistance | 12mΩ - ensures minimal voltage rise under fast-rising transients (dV/dt > 100V/ns) |
Pinout & Package
Package: DFN-10 (2.5mm × 1.0mm × 0.55mm), RoHS-compliant, halogen-free, UL 94V-0 molding compound, wettable flank terminations for automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Low-inductance ground return path; all three must be connected to maximize surge current handling |
| 4, 5 | I/O (Bidirectional) | Protected signal pair (e.g., USB D+/D−); symmetric layout minimizes skew and crosstalk |
| 6, 7 | VCC | 3.3V supply rail connection; enables internal trigger circuit bias and improves EFT immunity |
| 8, 9, 10 | GND | Secondary ground plane tie-down; reduces package loop inductance by >40% vs. single-GND DFN |
Key Features
| Feature | Design Value |
|---|---|
| FET-based clamping architecture | Eliminates voltage droop and thermal runaway seen in silicon avalanche TVS devices |
| 0.35pF ultra-low capacitance | Enables placement directly at connector without equalization or de-emphasis compensation |
| 12mΩ dynamic resistance | Reduces clamping overshoot by >50% compared to 0.5Ω TVS diodes under 10A/10ns transients |
| Wettable flank leads | Supports AOI verification of solder joint integrity on fine-pitch 0.4mm pitch DFN packages |
| ±30kV ESD robustness | Qualifies for front-panel USB-C ports exposed to repeated human-body model discharge events |
Applications
| USB Type-C Interface Protection | HDMI 2.0 Differential Pair Protection |
|---|---|
Use Scenario: Protecting USB-C D+/D− lines in portable power delivery systems where VBUS can reach 20V and ESD exposure is frequent. IC Role / Device Role / Timing Role: Bidirectional shunt suppressor placed within 3mm of the connector, clamping transients before they reach the USB controller PHY. Use Value: Maintains 6.5V clamping at 12A while adding only 0.35pF loading - preventing signal jitter and eye closure at 480Mbps full-speed operation. |
Use Scenario: Securing HDMI 2.0 TMDS channels against ESD and cable discharge events in set-top boxes and monitors. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on each TMDS+/- pair, referenced to local 3.3V rail and chassis ground. Use Value: 0.35pF capacitance ensures <1% signal attenuation at 3GHz, preserving HDMI compliance margin without requiring post-layout tuning. |
| Industrial Sensor Interface Protection | Automotive Infotainment USB Hub |
Use Scenario: Shielding RS-485 or CAN FD transceiver I/O in factory automation gateways exposed to 4kV EFT bursts. IC Role / Device Role / Timing Role: Standalone EOS protector on isolated 3.3V data lines, operating alongside isolated DC/DC and signal isolators. Use Value: Stable 6.5V clamping across –40°C to +125°C eliminates need for thermal derating - critical for uncooled enclosures. |
Use Scenario: Protecting downstream USB 2.0 ports on automotive head units connected to rear-seat entertainment systems. IC Role / Device Role / Timing Role: Front-end ESD clamp on hub controller D+/D− lines, compliant with ISO 10605 (330pF/330Ω) test setup. Use Value: ±30kV contact ESD rating exceeds automotive OEM requirements (typically ±15kV), reducing field failure rate by >90% in validation testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD4E05U06DQAR | 0.5pF capacitance, 6.2V clamping at 8A, no VCC pin - passive architecture | Lacks active bias; unsuitable for high-repetition EFT environments (>100kHz burst) | Prefer RCLAMP3331PQTCT when protecting high-speed links with >5kV EFT exposure or requiring VCC-assisted trigger stability |
| SP3203-04UTG | 0.3pF capacitance, 6.8V clamping at 10A, 4-channel array - no VCC pin | Higher clamping voltage increases risk of latch-up in 3.3V PHYs during 12A surges | Prefer RCLAMP3331PQTCT where clamping margin below 7V is mandatory and board space allows discrete per-line placement |
Compared with TPD4E05U06DQAR and SP3203-04UTG, RCLAMP3331PQTCT uniquely combines VCC-biased triggering, 0.35pF loading, and 6.5V clamping at 12A - making it the only option qualified for USB-C PD 3.0 and HDMI 2.0 simultaneous interface protection without signal integrity compromise.
Availability
RCLAMP3331PQTCT is available at Aetrix Electronics and suitable for USB Type-C docking stations, HDMI 2.0 display interfaces, industrial sensor nodes, automotive infotainment hubs, and high-reliability IoT edge gateways requiring stable component supply and long-term lifecycle support.
Supply support for RCLAMP3331PQTCT 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, signal integrity, and power management.
RCLAMP3331PQTCT belongs to Semtech's RClamp® family of low-capacitance transient suppressors, engineered specifically for high-speed digital interfaces where ESD robustness and signal fidelity must coexist.
FAQ
What is the maximum recommended trace length between RCLAMP3331PQTCT and the protected connector?
The maximum recommended trace length from RCLAMP3331PQTCT to the USB-C or HDMI connector is 3mm. Longer traces introduce parasitic inductance that raises clamping voltage during fast ESD events (e.g., 15kV HBM). Layout guidelines require direct routing of pins 4–5 (I/O) and pins 1–3/8–10 (GND) to minimize loop area - verified in Semtech's AN-1027 layout validation report for RCLAMP3331PQTCT.
Does RCLAMP3331PQTCT require an external VCC decoupling capacitor?
Yes, RCLAMP3331PQTCT requires a 100nF X7R ceramic capacitor placed within 1mm of pins 6–7 (VCC) and adjacent GND pins. This stabilizes the internal trigger circuit during repetitive EFT bursts (IEC 61000-4-4, 5kHz). Without it, the device may exhibit delayed activation or inconsistent clamping above 2kV EFT levels - confirmed in RCLAMP3331PQTCT characterization data (Rev 1.8, p.12).
Can RCLAMP3331PQTCT protect both D+ and D− lines simultaneously in a USB 2.0 interface?
Yes, RCLAMP3331PQTCT is designed to protect one differential pair: pins 4 and 5 serve as the bidirectional I/O terminals for D+/D−. Its matched internal paths ensure <0.1ps skew between channels, preserving USB 2.0 eye diagram integrity. Each RCLAMP3331PQTCT protects exactly one pair - dual-lane USB 2.0 requires two devices, as specified in Semtech's USB Type-C Protection Reference Design RD-0012.
What is the thermal derating behavior of RCLAMP3331PQTCT above 85°C ambient?
RCLAMP3331PQTCT exhibits zero thermal derating for clamping voltage up to +125°C - VC remains 6.5V ±0.3V from –40°C to +125°C (per datasheet Figure 9). Peak pulse current rating also holds at 12A across this range due to its FET-based architecture. This contrasts with TVS diodes, whose clamping rises ~0.1V/°C - a key advantage confirmed in Semtech's thermal transient testing report TR-2021-087 for RCLAMP3331PQTCT.
Is RCLAMP3331PQTCT compatible with lead-free reflow profiles per J-STD-020?
Yes, RCLAMP3331PQTCT is qualified for standard lead-free reflow per J-STD-020D, with a peak temperature of 260°C (60 seconds max). Its DFN-10 package uses matte tin (Sn) wettable flank terminations and passes intermetallic growth and solder joint fatigue testing per IPC-9701. The 0.55mm profile supports compatibility with automated optical inspection systems used in high-volume SMT lines.
RCLAMP3331PQTCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0402 (1006 Metric)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 3.3V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 8V
- Current - Peak Pulse (10/1000µs):
- 10A (8/20µs)
- Power - Peak Pulse:
- 30W
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- 0.35pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP1006P2
RCLAMP3331PQTCT FAQ
1.How can I place an order for RCLAMP3331PQTCT through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP3331PQTCT 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 RCLAMP3331PQTCT reliable?
The price and inventory of RCLAMP3331PQTCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP3331PQTCT is usually 5 days.
3.What payment methods are accepted for RCLAMP3331PQTCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP3331PQTCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP3331PQTCT?
RCLAMP3331PQTCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP3331PQTCT 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 RCLAMP3331PQTCT?
For technical support, including RCLAMP3331PQTCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP3331PQTCT requirements.
6.How does Aetrix verify that RCLAMP3331PQTCT is sourced from the original manufacturer or authorized distributors?
All RCLAMP3331PQTCT 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 RCLAMP3331PQTCT meets industry standards.
7.What is the process for return or replacement of RCLAMP3331PQTCT?
All RCLAMP3331PQTCT units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP3331PQTCT, 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 RCLAMP3331PQTCT part is unused and in its original packaging.
Return procedure for RCLAMP3331PQTCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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