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Semtech Corporation RCLAMP3521ZATFT
- Part No.:
- RCLAMP3521ZATFT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0201 (0603 Metric)
- Datasheet:
-
RCLAMP3521ZATFT.pdf
- Description:
- TVS DIODE 3.5VWM 5V SLP0603P2X3F
- Quantity:
- Payment:
- Shipping:
Inventory:35,147
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Product details
Overview
RClamp3521ZATFT from Semtech is a single-line, bidirectional TVS diode for high-speed data line ESD and EOS protection, featuring 3.5V working voltage, 0.45pF typical junction capacitance, 5V clamping voltage at 6A (1.2/50µs), ±20kV IEC 61000-4-2 contact ESD rating, and ultra-low 0.12Ω dynamic resistance - deployed in USB 3.1, USB Type-C, and V-By-One interfaces.
For engineers reviewing the RClamp3521ZATFT datasheet, pinout, applications, or equivalent options, key selection criteria include sub-0.5pF capacitance for signal integrity, snap-back silicon-avalanche architecture for low clamping, SLP0603P2X3F package compatibility with high-density PCB layouts, and compliance with IEC 61000-4-2/4/5 transient immunity standards.
Technical Context
RClamp3521ZATFT employs Semtech's proprietary snap-back technology to achieve rapid turn-on and minimal voltage overshoot during ESD events. Its bidirectional structure supports symmetric transient suppression on AC-coupled high-speed lines without polarity constraints.
The device operates with a 3.5V reverse stand-off voltage and clamps to ≤5V under 6A 1.2/50µs combination waveform stress. Its 0.12Ω dynamic resistance and 0.45pF capacitance at 1MHz ensure minimal insertion loss and signal distortion up to multi-GHz frequencies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 3.5V - Matches 3.3V rail systems with margin for ripple and tolerance. |
| Capacitance (1MHz) | 0.45 pF typical - Enables clean signal integrity on >5 Gbps interfaces like USB 3.1 Gen 1. |
| Clamping Voltage | 5 V at 6A (1.2/50µs) - Limits downstream IC stress below typical 5.5V I/O absolute max ratings. |
| ESD Rating | ±20 kV contact per IEC 61000-4-2 - Meets industrial and consumer end-equipment surge immunity requirements. |
| Dynamic Resistance | 0.12 Ω typical - Reduces voltage overshoot during fast transients via low-impedance conduction path. |
| Package | SLP0603P2X3F (0.6 × 0.3 × 0.25 mm) - Supports fine-pitch routing and ultra-compact port-level protection layout. |
Pinout & Package
SLP0603P2X3F is a 2-pin, bottom-terminal, lead-free NiAu-finished package measuring 0.6 mm × 0.3 mm × 0.25 mm. It uses solder-mask-defined or non-solder-mask-defined land pads per Semtech's recommended mounting pattern (0.270 mm × 0.175 mm pad size).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode / Line Terminal A | Bidirectional conduction path - connects to protected high-speed signal line (e.g., USB3_SSTX+). |
| 2 | Cathode / Line Terminal B | Completes symmetrical ESD current path to ground reference - no DC bias polarity requirement. |
Key Features
| Feature | Design Value |
|---|---|
| Snap-back silicon-avalanche technology | Enables sub-nanosecond response and clamping voltage <5V at 6A, reducing risk of latch-up in sensitive SerDes receivers. |
| 0.45 pF junction capacitance | Minimizes signal attenuation and phase distortion on differential pairs operating up to 5 Gbps (USB 3.1 Gen 1). |
| ±20 kV IEC 61000-4-2 contact ESD | Provides robust front-end protection for user-accessible ports without requiring additional shielding or layout derating. |
| 0.12 Ω dynamic resistance | Ensures low-voltage overshoot during fast TLP pulses (0.2/100 ns), critical for protecting 28 nm/16 nm PHY I/O cells. |
Applications
| USB 3.1 Gen 1 Interface | USB Type-C Connector |
|---|---|
Use Scenario: Protecting SuperSpeed TX/RX differential pairs on host and peripheral side of USB 3.1 Gen 1 links. IC Role / Device Role: Bidirectional ESD clamp placed immediately adjacent to connector pins before series AC coupling capacitors. Use Value: 0.45 pF capacitance avoids measurable eye diagram degradation at 5 Gbps; ±20 kV contact rating covers plug/unplug events. |
Use Scenario: Shielding all 24-pin USB Type-C receptacle lanes (including CC, SBU, and SuperSpeed pairs) against hot-plug ESD. IC Role / Device Role: Discrete line-level protection per signal lane due to compact SLP0603P2X3F footprint enabling one-device-per-lane placement. Use Value: 0.6 × 0.3 mm size fits within tight connector keep-out zones; snap-back behavior prevents false triggering during normal signaling. |
| V-By-One HS Link | MHL / MDDI Video Interface |
Use Scenario: Securing V-By-One HS serial video links (up to 3.75 Gbps per lane) in automotive displays and industrial panels. IC Role / Device Role: Low-capacitance TVS on each differential video lane, mounted directly at board edge near FPC connector. Use Value: 5V clamping ensures receiver input stays within safe operating range during 6A lightning surge (IEC 61000-4-5, 8/20 µs). |
Use Scenario: Protecting Mobile High-Definition Link (MHL) and MDDI video/data channels in smartphones and docking stations. IC Role / Device Role: Single-line ESD suppressor on D+ and D− lines shared between USB and MHL modes. Use Value: Bidirectional operation supports full-duplex MHL signaling without polarity concerns; 0.12 Ω RDYN limits voltage rise during 16A TLP stress. |
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 (0.6pF/channel), 3.6V working voltage, ±12kV IEC 61000-4-2 contact | Requires fewer devices for multi-line protection but higher per-line capacitance than RClamp3521ZATFT | Prefer when consolidating protection across multiple USB 2.0 or low-speed lines; avoid for >3 Gbps differential signals. |
| SP3203-01UTG | Single-line, 0.35pF typical capacitance, 3.3V working voltage, ±15kV IEC 61000-4-2 contact | Lower capacitance but reduced ESD rating and no IEC 61000-4-5 lightning surge rating | Select when ultra-low capacitance is prioritized over system-level surge immunity (e.g., internal board-to-board links). |
Compared with TPD4E001DQAR and SP3203-01UTG, RClamp3521ZATFT uniquely balances 0.45pF capacitance, ±20kV ESD rating, and 6A IEC 61000-4-5 surge capability in a discrete 2-pin package - making it optimal for external-facing, high-speed, single-line protection where both signal fidelity and robustness are required.
Availability
RClamp3521ZATFT is available at Aetrix Electronics and suitable for USB 3.1, USB Type-C, and V-By-One HS interface designs requiring stable component supply, consistent tape-and-reel packaging (15,000 units per 7-inch reel), and RoHS-compliant manufacturing.
Supply support for RClamp3521ZATFT 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, power management, and protection solutions.
RClamp3521ZATFT belongs to Semtech's RailClamp® family of low-capacitance TVS diodes, engineered specifically for ESD/EOS protection of high-speed digital interfaces without compromising signal integrity.
FAQ
What is the maximum peak pulse current rating for RClamp3521ZATFT?
RClamp3521ZATFT has a maximum peak pulse current rating of 6 A under IEC 61000-4-5 8/20 µs lightning surge conditions. This value is validated per the device's absolute maximum ratings table and corresponds to a clamping voltage of 5 V, ensuring downstream circuitry remains within safe operating limits during transient events.
Does RClamp3521ZATFT support bidirectional ESD protection?
Yes, RClamp3521ZATFT is a fully bidirectional TVS diode, meaning it provides symmetrical ESD clamping for both positive and negative transients without polarity dependency. This makes it ideal for AC-coupled differential interfaces like USB 3.1 and V-By-One HS where signal swing crosses ground reference.
What is the junction capacitance of RClamp3521ZATFT at zero bias?
The junction capacitance of RClamp3521ZATFT is 0.45 pF typical at VR = 0 V and f = 1 MHz, as specified in the Electrical Characteristics table. This ultra-low value is measured under zero-bias conditions and is critical for preserving signal integrity on high-speed serial links.
Is RClamp3521ZATFT compatible with lead-free reflow processes?
Yes, RClamp3521ZATFT is qualified for lead-free reflow per JEDEC J-STD-020, with a maximum peak temperature of 260°C. Its NiAu lead finish and SLP0603P2X3F package are designed for compatibility with standard Pb-free assembly processes used in modern electronics manufacturing.
How does the snap-back technology in RClamp3521ZATFT improve ESD performance?
RClamp3521ZATFT's snap-back silicon-avalanche technology enables faster turn-on and lower clamping voltage compared to standard avalanche diodes. It reduces ESD peak clamping voltage to 4.5 V at 4 A TLP and maintains 5 V at 6 A, minimizing stress on sensitive high-speed transceivers during real-world ESD events.
RCLAMP3521ZATFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0201 (0603 Metric)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 3.5V (Max)
- Voltage - Breakdown (Min):
- 5.5V
- Voltage - Clamping (Max) @ Ipp:
- 5V (Typ)
- Current - Peak Pulse (10/1000µs):
- 6A
- Power - Peak Pulse:
- 30W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 0.45pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP0603P2X3F
RCLAMP3521ZATFT FAQ
1.How can I place an order for RCLAMP3521ZATFT through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP3521ZATFT 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 RCLAMP3521ZATFT reliable?
The price and inventory of RCLAMP3521ZATFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP3521ZATFT is usually 5 days.
3.What payment methods are accepted for RCLAMP3521ZATFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP3521ZATFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP3521ZATFT?
RCLAMP3521ZATFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP3521ZATFT 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 RCLAMP3521ZATFT?
For technical support, including RCLAMP3521ZATFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP3521ZATFT requirements.
6.How does Aetrix verify that RCLAMP3521ZATFT is sourced from the original manufacturer or authorized distributors?
All RCLAMP3521ZATFT 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 RCLAMP3521ZATFT meets industry standards.
7.What is the process for return or replacement of RCLAMP3521ZATFT?
All RCLAMP3521ZATFT units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP3521ZATFT, 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 RCLAMP3521ZATFT part is unused and in its original packaging.
Return procedure for RCLAMP3521ZATFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RCLAMP3521ZATFT Tags
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