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Semtech Corporation RCLAMP3351ZATFT
- Part No.:
- RCLAMP3351ZATFT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0201 (0603 Metric)
- Datasheet:
-
RCLAMP3351ZATFT.pdf
- Description:
- RCLAMP 1-LINE 3.3V 1PF 10A SLP06
- Quantity:
- Payment:
- Shipping:
Inventory:14,425
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Product details
Overview
RClamp3351ZATFT from Semtech is a single-line, bidirectional TVS diode for ESD and EOS protection of high-speed data lines operating at ±3.3 V, featuring 0.6 pF max junction capacitance, ±25 kV (air) / ±22 kV (contact) IEC 61000-4-2 ESD rating, and 10 A (8/20 µs) surge capability-used in USB 2.0, SD card, GbE, and LVDS interfaces.
For engineers reviewing the RClamp3351ZATFT datasheet, pinout, applications, or equivalent options, key selection criteria include ultra-low capacitance for signal integrity, low clamping voltage (3.2 V at 4 A TLP), dynamic resistance of 0.15 Ω, symmetrical rail-to-rail protection, and SLP0603P2X3F package compatibility with high-density PCB layouts.
Technical Context
The RClamp3351ZATFT employs silicon-avalanche solid-state technology to deliver fast response (<1 ns), low clamping voltage, and stable performance across −40 °C to +85 °C. Its symmetrical structure enables bidirectional protection without polarity constraints on data lines.
It operates as a rail-to-rail clamp between two terminals, with reverse stand-off voltage of 3.3 V, breakdown voltage of 5.5–9 V, and clamping voltage of 6.5 V at 10 A (1.2/50 µs + 8/20 µs combo waveform). Dynamic resistance is measured at 0.15 Ω using TLP (0.2/100 ns).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| ESD Rating (IEC 61000-4-2) | ±25 kV air / ±22 kV contact - ensures robust board-level immunity against human-body ESD events |
| Surge Current (8/20 µs) | 10 A - withstands high-energy electrical overstress transients in industrial and communication ports |
| Junction Capacitance | 0.47–0.6 pF @ 1 MHz, 0 V - preserves signal integrity on >480 Mbps USB 2.0 and GbE differential pairs |
| Clamping Voltage | 3.2 V @ 4 A TLP - limits transient voltage below IC I/O absolute maximum ratings during ESD |
| Dynamic Resistance | 0.15 Ω - minimizes voltage overshoot under fast-rising ESD pulses via low-impedance conduction path |
| Working Voltage | ±3.3 V - matches standard I/O supply rails for USB, SD, and LVDS without level-shifting |
Pinout & Package
The RClamp3351ZATFT is housed in a 2-pin SLP0603P2X3F package measuring 0.60 × 0.30 × 0.25 mm, with NiAu lead finish and tape-and-reel packaging (15,000 pcs/reel, 7-inch reel). The device is electrically symmetrical - Pin 1 and Pin 2 are interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode/Cathode (symmetrical) | Interchangeable terminal for bidirectional clamping; connects to protected data line (e.g., USB D+) |
| Pin 2 | Anode/Cathode (symmetrical) | Interchangeable terminal tied to system ground or complementary data line (e.g., USB D− or GND) |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low capacitance | 0.6 pF max ensures <0.1 dB insertion loss up to 3 GHz - critical for USB 2.0 eye diagram compliance |
| Low clamping voltage | 3.2 V at 4 A TLP prevents latch-up in 3.3 V I/O buffers during ESD discharge |
| High surge capability | 10 A (8/20 µs) supports repeated EOS events in industrial Ethernet and SD card hot-plug scenarios |
| Symmetrical rail-clamp architecture | Enables single-device protection of AC-coupled or differential signals without polarity assignment |
Applications
| USB 2.0 Interface Protection | SD Card Slot Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB 2.0 host/device ports against ESD during cable insertion and handling. IC Role / Device Role / Timing Role: Bidirectional TVS diode placed directly at connector, clamping transients before they reach PHY IC. Use Value: 0.6 pF capacitance avoids signal degradation; ±22 kV contact ESD rating exceeds IEC 61000-4-2 Level 4 requirements. |
Use Scenario: Shielding SD card interface pins (CMD, CLK, DAT0–DAT3) from ESD during card insertion/removal in portable devices. IC Role / Device Role / Timing Role: Line-specific rail clamp per signal, mounted adjacent to SD card connector footprint. Use Value: Low dynamic resistance (0.15 Ω) ensures rapid energy diversion; 3.3 V working voltage aligns with SD 3.0 bus voltage. |
| Gigabit Ethernet PHY Protection | LVDS Display Interface Protection |
Use Scenario: Safeguarding transformer-coupled GbE MDI lines (TX+/TX−, RX+/RX−) against lightning-induced surges and ESD. IC Role / Device Role / Timing Role: Discrete TVS per differential pair, placed after magnetics but before PHY termination resistors. Use Value: 10 A surge rating handles induced 8/20 µs transients; symmetrical design supports differential signaling integrity. |
Use Scenario: Protecting high-speed LVDS video links (e.g., eDP, FPD-Link) between display controller and panel in thin-bezel displays. IC Role / Device Role / Timing Role: One RClamp3351ZATFT per LVDS data lane, positioned at source-side PCB edge. Use Value: Sub-0.6 pF capacitance maintains >1 Gbps data rate fidelity; ±3.3 V operation matches typical LVDS common-mode range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD4E001DQAR | 4-channel array in X2SON-8; 0.5 pF per channel; lower 12 kV contact ESD rating | Requires multi-line protection; not suitable for discrete single-line placement | Select when protecting ≥2 lines simultaneously and board space permits array layout |
| ESD5Z3.3T5G | Single-line SOD-523; 0.8 pF max; ±12 kV contact ESD; higher 15 V clamping at 1 A | Larger footprint (1.2 × 0.8 mm); higher capacitance degrades >200 MHz signal integrity | Choose only if SLP0603P2X3F assembly capability is unavailable and 0.8 pF is acceptable |
Compared with TPD4E001DQAR and ESD5Z3.3T5G, the RClamp3351ZATFT delivers superior single-line ESD robustness (±22 kV), lowest capacitance (0.6 pF), and smallest footprint (0.6 × 0.3 mm), making it optimal for space-constrained, high-speed interfaces where discrete per-line protection is required.
Availability
RClamp3351ZATFT is available at Aetrix Electronics and suitable for USB 2.0 interface protection, SD card slot hardening, and Gigabit Ethernet PHY safeguarding requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for RClamp3351ZATFT 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 sensing, protection, and signal integrity.
The RClamp® family was developed specifically for board-level transient suppression in high-speed digital interfaces, balancing ultra-low capacitance, fast response, and high surge tolerance for consumer, industrial, and communications equipment.
FAQ
What is the maximum junction capacitance of RClamp3351ZATFT and why does it matter?
The RClamp3351ZATFT has a maximum junction capacitance of 0.6 pF at 1 MHz and 0 V bias. This ultra-low value is critical for preserving signal integrity on high-speed interfaces like USB 2.0 (480 Mbps) and LVDS, where excess capacitance causes rise-time degradation, jitter, and eye-diagram closure. At 0.6 pF, the RClamp3351ZATFT introduces negligible loading on differential pairs while maintaining effective ESD clamping.
Is RClamp3351ZATFT suitable for protecting bidirectional data lines such as USB D+ and D−?
Yes, the RClamp3351ZATFT is electrically symmetrical - Pins 1 and 2 are interchangeable - enabling true bidirectional clamping without polarity concerns. It is explicitly validated for USB 2.0 applications in Semtech's datasheet, with clamping performance specified for both positive and negative ESD transients, making it ideal for protecting AC-coupled or differential data lines like USB D+ and D−.
What is the clamping voltage of RClamp3351ZATFT under real-world ESD conditions?
The RClamp3351ZATFT achieves a clamping voltage of 3.2 V at 4 A using Transmission Line Pulse (TLP) testing (0.2/100 ns), which closely models actual ESD discharge behavior. Under IEC 61000-4-2 contact discharge (±8 kV), measured clamping remains below 5 V. This low clamping ensures protected ICs stay within their absolute maximum I/O voltage ratings during ESD events.
Can RClamp3351ZATFT be used in place of a larger-package TVS for space-constrained designs?
Yes - the RClamp3351ZATFT uses the ultra-compact SLP0603P2X3F package (0.60 × 0.30 × 0.25 mm), significantly smaller than standard SOD-523 or SC-70 packages. Its footprint saves >60% board area versus typical 0805 TVS diodes, enabling placement directly at high-speed connector pads where layout space is most constrained - a key advantage confirmed in Semtech's application guidelines.
Does RClamp3351ZATFT require special PCB layout or soldering considerations?
Yes - due to its 0.60 × 0.30 mm size, RClamp3351ZATFT requires precise stencil design: laser-cut, electropolished stencils with 0.075 mm thickness and rectangular apertures (area ratio ≥0.66). Semtech recommends OSP or NiAu PCB pad finishes and Type 4 solder paste. Reflow must follow JEDEC J-STD-020 to avoid tombstoning or insufficient wetting.
RCLAMP3351ZATFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0201 (0603 Metric)
- Series:
- RailClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 3.3V
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- 10A (8/20µs)
- Power - Peak Pulse:
- -
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP0603P2X3F
RCLAMP3351ZATFT FAQ
1.How can I place an order for RCLAMP3351ZATFT through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP3351ZATFT 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 RCLAMP3351ZATFT reliable?
The price and inventory of RCLAMP3351ZATFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP3351ZATFT is usually 5 days.
3.What payment methods are accepted for RCLAMP3351ZATFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP3351ZATFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP3351ZATFT?
RCLAMP3351ZATFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP3351ZATFT 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 RCLAMP3351ZATFT?
For technical support, including RCLAMP3351ZATFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP3351ZATFT requirements.
6.How does Aetrix verify that RCLAMP3351ZATFT is sourced from the original manufacturer or authorized distributors?
All RCLAMP3351ZATFT 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 RCLAMP3351ZATFT meets industry standards.
7.What is the process for return or replacement of RCLAMP3351ZATFT?
All RCLAMP3351ZATFT units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP3351ZATFT, 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 RCLAMP3351ZATFT part is unused and in its original packaging.
Return procedure for RCLAMP3351ZATFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RCLAMP3351ZATFT Tags
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