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Semtech Corporation RCLAMP3346P.TNT
- Part No.:
- RCLAMP3346P.TNT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 7-UDFN
- Datasheet:
-
RCLAMP3346P.TNT.pdf
- Description:
- TVS DIODE 3.3VWM 4.5VC SGP2708N7
- Quantity:
- Payment:
- Shipping:
Inventory:16,492
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Product details
Overview
RCLAMP3346P.TNT from Semtech is a transient diverting suppressor designed for high-energy EOS/ESD protection of single 3.3V I/O or power lines in USB, HDMI, and industrial interfaces. It delivers ±30kV IEC 61000-4-2 contact ESD immunity, clamps at 6.5V (IPP = 12A), features 17pF junction capacitance, and uses solid-state FET-based shunt architecture for stable clamping across temperature and current.
For engineers reviewing the RCLAMP3346P.TNT datasheet, pinout, applications, or equivalent options, key selection criteria include its low clamping voltage under 12A surge, minimal signal distortion due to ultra-low capacitance, compatibility with high-speed 3.3V interfaces, and DFN-10 package layout requirements for optimal PCB transient path integrity.
Technical Context
RCLAMP3346P.TNT implements a precision-triggered, surge-rated FET shunt architecture - not a conventional TVS diode - enabling near-constant clamping voltage (6.5V) from 1A to 12A (tp = 8/20μs) and across –40°C to +125°C. Its trigger circuit activates the low-RDS(on) FET only during overvoltage events, minimizing leakage (<100nA at 3.3V) and dynamic loading during normal operation.
The device protects one bidirectional 3.3V line with reverse stand-off voltage (VRWM) of 3.3V, breakdown voltage (VBR) of 4.2V (min), and dynamic resistance (RDYN) of 0.25Ω - critical for maintaining signal integrity in USB 2.0, HDMI, and industrial sensor interfaces where capacitance and clamping consistency directly impact eye diagram margin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 3.3V - matches standard I/O rail voltage for USB 2.0, HDMI DDC, and industrial microcontroller GPIOs. |
| Clamping Voltage (VC) | 6.5V at IPP = 12A (8/20μs) - stays below 7V threshold required to protect 3.3V logic inputs without latch-up risk. |
| Junction Capacitance | 17pF at VR = 3.3V, f = 1MHz - low enough to avoid signal degradation on 480Mbps USB 2.0 data lines. |
| ESD Withstand | ±30kV contact per IEC 61000-4-2 - exceeds Level 4 system-level ESD immunity requirements for end-equipment certification. |
| Peak Pulse Current | 12A (8/20μs) - supports common industrial surge test profiles including IEC 61000-4-5 Line-to-Ground surges. |
| Leakage Current | <100nA at 3.3V - negligible loading on high-impedance sensor or analog monitoring circuits. |
Pinout & Package
Package: DFN-10 (2.5mm × 1.0mm × 0.55mm), RoHS-compliant, halogen-free, UL 94V-0 molding compound. Exposed thermal pad (Pin 10) must be soldered to PCB ground plane for full surge rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5 | GND | Five dedicated ground terminals - all must be connected to minimize inductance and ensure full 12A surge current path to PCB ground plane. |
| 6, 7, 8 | IN | Three parallel input terminals - connect directly to protected line (e.g., USB D+, D−, or HDMI TMDS+); enables low-inductance, high-current shunt path. |
| 9 | NC | No-connect - internally unconnected; must remain floating per datasheet to avoid performance degradation. |
| 10 | EPAD | Exposed thermal pad - electrically tied to GND; requires full-solder coverage to PCB ground for thermal dissipation and surge robustness. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt clamping | Delivers flat 6.5V clamping from 1A–12A (8/20μs), eliminating voltage rise seen in TVS diodes - critical for protecting 3.3V logic under worst-case surge conditions. |
| Ultra-low 17pF capacitance | Preserves signal integrity on high-speed 480Mbps USB 2.0 and HDMI DDC lines without requiring trace length compensation or equalization. |
| ±30kV ESD immunity | Meets and exceeds IEC 61000-4-2 Level 4 for system-level ESD robustness - reduces need for secondary board-level protection layers. |
| DFN-10 footprint | 2.5mm × 1.0mm size saves >50% board area vs. legacy SOIC-8 TVS solutions while supporting automated optical inspection (AOI) and reflow. |
Applications
| USB 2.0 Data Lines | HDMI DDC Channel |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB 2.0 host/device ports against ESD and lightning-induced surges in portable and industrial equipment. IC Role / Device Role / Timing Role: Bidirectional transient shunt placed immediately adjacent to USB connector to clamp fast-rising ESD transients before they reach PHY or controller. Use Value: 17pF capacitance avoids signal rise-time degradation; 6.5V clamping ensures 3.3V I/O pins remain within safe operating voltage during 12A surges. | Use Scenario: Securing HDMI Display Data Channel (DDC) lines (SDA/SCL) against ESD events during cable hot-plug in consumer AV gear and digital signage. IC Role / Device Role / Timing Role: Low-capacitance protector on 3.3V open-drain I²C bus - maintains bus timing margins and prevents false ACK/NACK due to transient coupling. Use Value: Sub-100nA leakage preserves I²C pull-up bias; flat clamping prevents DDC communication lockup during ±30kV contact discharge. |
| Industrial Sensor Interface | IoT Device Power Input |
Use Scenario: Shielding analog or digital sensor outputs (e.g., 3.3V RS-485 transceivers, ADC front-ends) from EOS in factory automation and smart metering systems. IC Role / Device Role / Timing Role: Single-line protector on 3.3V sensor data or control lines exposed to long cables or harsh EMI environments. Use Value: Stable 6.5V clamping across –40°C to +125°C ensures consistent protection in uncontrolled ambient conditions without derating. | Use Scenario: Safeguarding 3.3V power rails feeding BLE/Wi-Fi modules in battery-powered IoT nodes subjected to user-handling ESD and board-level surges. IC Role / Device Role / Timing Role: Input-side surge limiter on regulated 3.3V supply - limits transient energy entering PMIC or MCU VDDIO domains. Use Value: 12A peak pulse rating handles coupled surges from nearby switching events; DFN-10 footprint fits tight space constraints near connectors. |
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 array; 6.5V clamping at 1A (not 12A); higher dynamic resistance (~0.8Ω); 25pF capacitance. | Limited to lower-energy ESD-only scenarios; unsuitable for IEC 61000-4-5 surge due to current derating above 3A. | Select SP1003-01UTG only when cost is primary constraint and surge testing is not required. |
| TPD4E001DPYR | Quad-channel TVS; 6.5V clamping at 1A per channel; 12pF typical; rated for 4A (8/20μs) per line. | Requires four devices for full USB 2.0 protection; lacks FET-based flat clamping - VC rises to ~9V at 8A. | Choose TPD4E001DPYR when multi-line integration is prioritized over surge robustness and clamping stability. |
Compared with SP1003-01UTG and TPD4E001DPYR, RCLAMP3346P.TNT uniquely sustains 6.5V clamping up to 12A while maintaining 17pF capacitance and –40°C to +125°C stability - making it the only option qualified for combined ESD + surge protection in space-constrained 3.3V high-speed interfaces.
Availability
RCLAMP3346P.TNT is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI DDC safeguarding, and industrial sensor I/O hardening requiring stable component supply and guaranteed long-term manufacturability.
Supply support for RCLAMP3346P.TNT 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 protection, sensing, and signal integrity.
RCLAMP3346P.TNT belongs to Semtech's RClamp® family of transient suppressors - engineered specifically for low-voltage, high-speed digital interfaces where traditional TVS limitations in clamping consistency and capacitance are unacceptable.
FAQ
What is the maximum peak pulse current rating for RCLAMP3346P.TNT?
RCLAMP3346P.TNT is rated for 12A peak pulse current (tp = 8/20μs) per IEC 61000-4-5. This rating assumes proper PCB layout with all five GND pins and three IN pins connected, and the exposed pad fully soldered to a solid ground plane. Derating applies above +85°C ambient.
Does RCLAMP3346P.TNT support bidirectional signal lines like USB D+ and D−?
Yes, RCLAMP3346P.TNT is inherently bidirectional and symmetric - its FET-based architecture provides identical clamping behavior for positive and negative transients. It is validated for use on USB 2.0 differential pairs, HDMI DDC lines, and other 3.3V bidirectional interfaces without polarity concerns.
How does the clamping voltage of RCLAMP3346P.TNT behave across temperature?
RCLAMP3346P.TNT maintains a stable 6.5V clamping voltage (at IPP = 12A) from –40°C to +125°C. Unlike conventional TVS diodes whose clamping rises with temperature, RCLAMP3346P.TNT's FET-shunt design ensures <±0.2V variation - confirmed by Semtech's characterization data in the official datasheet.
Can RCLAMP3346P.TNT replace a standard TVS diode in an existing 3.3V design?
RCLAMP3346P.TNT can replace many 3.3V TVS diodes, but layout changes are required: its DFN-10 footprint differs from SOD-323 or SC-70 packages, and all five GND pins must connect to ground - not just one. Also, Pin 9 is NC and must remain unconnected. Review PCB land pattern and routing per Semtech's layout guidelines before substitution.
What is the junction capacitance of RCLAMP3346P.TNT at 3.3V reverse bias?
The junction capacitance of RCLAMP3346P.TNT is 17pF measured at VR = 3.3V and f = 1MHz. This value remains stable across temperature and is low enough to avoid measurable rise-time degradation on 480Mbps USB 2.0 signals, as verified in Semtech's application notes and characterization reports.
RCLAMP3346P.TNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 7-UDFN
- Series:
- RailClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 6
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3.3V (Max)
- Voltage - Breakdown (Min):
- 7V
- Voltage - Clamping (Max) @ Ipp:
- 4.5V
- Current - Peak Pulse (10/1000µs):
- 4.5A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- 0.6pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SGP2708N7
RCLAMP3346P.TNT FAQ
1.How can I place an order for RCLAMP3346P.TNT through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP3346P.TNT 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 RCLAMP3346P.TNT reliable?
The price and inventory of RCLAMP3346P.TNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP3346P.TNT is usually 5 days.
3.What payment methods are accepted for RCLAMP3346P.TNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP3346P.TNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP3346P.TNT?
RCLAMP3346P.TNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP3346P.TNT 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 RCLAMP3346P.TNT?
For technical support, including RCLAMP3346P.TNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP3346P.TNT requirements.
6.How does Aetrix verify that RCLAMP3346P.TNT is sourced from the original manufacturer or authorized distributors?
All RCLAMP3346P.TNT 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 RCLAMP3346P.TNT meets industry standards.
7.What is the process for return or replacement of RCLAMP3346P.TNT?
All RCLAMP3346P.TNT units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP3346P.TNT, 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 RCLAMP3346P.TNT part is unused and in its original packaging.
Return procedure for RCLAMP3346P.TNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RCLAMP3346P.TNT Tags
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