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Semtech Corporation RCLAMP0521PATCT
- Part No.:
- RCLAMP0521PATCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
RCLAMP0521PATCT.pdf
- Description:
- TVS DIODE 5VWM 25VC SLP1006P2
- Quantity:
- Payment:
- Shipping:
Inventory:9,281
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Product details
Overview
RCLAMP0521PATCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or data lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 24–40A, 20mΩ dynamic resistance, and 175pF junction capacitance - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the RCLAMP0521PATCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance for flat VC vs. IPP behavior, DFN-6 package layout compatibility, and compliance with IEC 61000-4-2/4-4/4-5 surge standards in high-voltage bus protection.
Technical Context
RCLAMP0521PATCT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt FET when transient voltage exceeds breakdown threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) across 24–40A and −40°C to +125°C due to decreasing RDS(on) under surge conditions.
The device implements a three-terminal architecture: pins 4–6 serve as parallel-connected input terminals for protected line connection, while pins 1–3 form a low-inductance ground return path. Its functional diagram confirms voltage-controlled switching behavior, where clamping voltage approximates the trigger circuit's VBR (~27.9V typ), not VBR + IPP × RDYN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage on protected line without leakage degradation. |
| Clamping Voltage | 27.5–28V at 24–40A (1.2/50μs + 8/20μs combo wave, RS = 2Ω) - ensures downstream ICs (e.g., USB PD controllers) remain below damage thresholds during surges. |
| Peak Pulse Current | 40A (8/20μs) - supports compliance with IEC 61000-4-5 ±1kV (RS = 42Ω) industrial surge testing. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - enables robust handling of human-body-model ESD events in portable and industrial interfaces. |
| Dynamic Resistance | 20mΩ (8/20μs, 1–40A range) - enables flat clamping response and minimizes voltage overshoot during fast-rising transients. |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with 22V bus protection where signal integrity constraints permit sub-200pF loading. |
Pinout & Package
Package: DFN-6 (1.6mm × 1.6mm × 0.55mm), Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound, tape-and-reel packaging (3,000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Low-inductance ground return path - all three must be connected to minimize parasitic inductance and maximize surge current handling. |
| Pins 4, 5, 6 | IN | Parallel-connected input terminals for protected line - all three required for full 40A rating and optimal thermal/surge performance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping voltage | 27.5–28V across full 24–40A surge range and −40°C to +125°C - eliminates need for derating at high temperature or current. |
| Surge-rated FET protection core | Replaces traditional pn-junction TVS with active shunt switch - achieves <0.1Ω effective RDS(on) under surge, reducing energy dissipation in junction. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz bursts) - protects against repetitive fast transients in industrial control and motor drive environments. |
| Low dynamic resistance | 20mΩ measured between 1A and 40A (8/20μs) - ensures minimal voltage rise during surge onset, critical for protecting sensitive 22V-rated ICs. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Front-End Protection |
|---|---|
|
Use Scenario: Protecting VBus lines in USB Type-C connectors supporting up to 20V PD operation, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector entry point to clamp overvoltage before reaching PD controller or load switch. Use Value: Maintains 27.5–28V clamping across temperature and current - prevents false triggering or damage to 22V-rated PD controllers where conventional TVS would exceed safe limits at elevated temperatures. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and IoT edge nodes subjected to 40A surges. IC Role / Device Role / Timing Role: Primary EOS protection element absorbing surge energy and limiting voltage seen by internal FET gate oxide and drain-source junction. Use Value: 20mΩ dynamic resistance and flat clamping prevent voltage overshoot during fast-rising transients, preserving load switch reliability and extending MTBF in harsh environments. |
| Storage Device Power Bus Protection | Notebook/Tablet 22V System Rail Protection |
|
Use Scenario: Securing 22V power rails feeding SSD controllers or NVMe interface power management ICs in enterprise storage enclosures. IC Role / Device Role / Timing Role: High-energy transient suppressor installed at board-level power entry to meet IEC 61000-4-5 surge immunity requirements. Use Value: 1120W peak pulse power rating and 40A capability ensure survivability against induced surges from shared AC mains or hot-swap events in rack-mounted systems. |
Use Scenario: Protecting 22V system rails (e.g., battery charging paths or display backlight supplies) in thin-client notebooks and ruggedized tablets. IC Role / Device Role / Timing Role: Compact DFN-6 EOS protector placed near high-density connectors to minimize trace inductance and coupling to adjacent high-speed signals. Use Value: 1.6mm × 1.6mm footprint saves >50% board area versus legacy SO-8 TVS solutions while maintaining full 40A surge rating and ±30kV ESD robustness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P.C | Identical electrical specs, same DFN-6 package, identical marking (T22), same reel quantity (3,000) - functionally identical part number variant. | No functional difference; used interchangeably in BOMs and procurement systems. | Select TDS2211P.C if sourcing directly from Semtech or authorized distributors requiring exact orderable suffix. |
| uClamp2411ZA | 24V working voltage, lower 24A peak pulse rating, higher 30V clamping voltage, smaller 0.65mm × 0.65mm DFN-2 package - optimized for CC/SBU lines, not main VBus. | Intended for low-capacitance, low-current auxiliary lines (e.g., USB-C CC, SBU), not 22V power rail protection. | Use uClamp2411ZA only for auxiliary signal lines; RCLAMP0521PATCT remains required for primary 22V bus protection due to superior 40A rating and flatter clamping. |
Compared with TDS2211P.C, RCLAMP0521PATCT offers identical performance and form factor but may differ in traceability or lot-level documentation; compared with uClamp2411ZA, RCLAMP0521PATCT provides 67% higher surge current capacity and 2.5V lower clamping - making it the sole suitable choice for 22V power rail EOS protection.
Availability
RCLAMP0521PATCT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and 22V storage device power buses requiring stable component supply, long-term lifecycle support, and guaranteed surge performance compliance.
Supply support for RCLAMP0521PATCT 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.
RCLAMP0521PATCT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-voltage, high-energy EOS protection applications where clamping stability and temperature independence are critical.
FAQ
What is the maximum continuous operating voltage for RCLAMP0521PATCT?
RCLAMP0521PATCT has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously withstand up to 22V DC on its input terminals without significant leakage current. This makes RCLAMP0521PATCT suitable for protecting 22V-rated power rails such as USB PD VBus, industrial load switch inputs, and notebook system rails where sustained voltage levels reach this threshold.
How does RCLAMP0521PATCT achieve stable clamping voltage across temperature and current?
RCLAMP0521PATCT uses a surge-rated FET activated by a precision trigger circuit instead of a passive pn-junction. As surge current increases, the FET's RDS(on) decreases, maintaining clamping voltage near the trigger circuit's breakdown voltage (~27.9V). This results in RCLAMP0521PATCT delivering 27.5–28V clamping from 24A to 40A and across −40°C to +125°C - unlike conventional TVS diodes whose clamping rises linearly with current and temperature.
What is the recommended PCB layout for RCLAMP0521PATCT to achieve full 40A surge rating?
To achieve RCLAMP0521PATCT's full 40A peak pulse current rating, all three GND pins (1–3) must connect to a low-inductance ground plane using multiple vias, and all three IN pins (4–6) must be tied together via a short, wide trace directly at the protected connector. RCLAMP0521PATCT must be placed within 5mm of the entry point, and no thermal pad is required - energy is dissipated in the FET channel, not the junction.
Is RCLAMP0521PATCT compliant with IEC 61000-4-5 surge immunity standards?
Yes, RCLAMP0521PATCT is rated for 40A peak pulse current (8/20μs), enabling it to meet the IEC 61000-4-5 ±1kV surge test (RS = 42Ω, CS = 0.5μF) commonly required in industrial equipment and USB PD applications. Its 27.5–28V clamping voltage ensures protected ICs remain within safe operating limits during such events - a key requirement validated in RCLAMP0521PATCT's official Semtech datasheet.
Can RCLAMP0521PATCT replace standard TVS diodes in 22V applications?
Yes, RCLAMP0521PATCT is specifically designed as a drop-in upgrade for 22V TVS diodes in high-reliability applications. Its FET-based architecture delivers lower and more stable clamping (27.5–28V vs. typical 35–40V for TVS), superior temperature stability, and higher surge current handling. However, RCLAMP0521PATCT requires proper PCB layout (all six pins connected) to realize these benefits - unlike two-terminal TVS devices.
RCLAMP0521PATCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0402 (1006 Metric)
- Series:
- RailClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 25V
- Current - Peak Pulse (10/1000µs):
- 4A (8/20µs)
- Power - Peak Pulse:
- 100W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 0.3pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP1006P2
RCLAMP0521PATCT FAQ
1.How can I place an order for RCLAMP0521PATCT through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP0521PATCT 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 RCLAMP0521PATCT reliable?
The price and inventory of RCLAMP0521PATCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP0521PATCT is usually 5 days.
3.What payment methods are accepted for RCLAMP0521PATCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP0521PATCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP0521PATCT?
RCLAMP0521PATCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP0521PATCT 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 RCLAMP0521PATCT?
For technical support, including RCLAMP0521PATCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP0521PATCT requirements.
6.How does Aetrix verify that RCLAMP0521PATCT is sourced from the original manufacturer or authorized distributors?
All RCLAMP0521PATCT 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 RCLAMP0521PATCT meets industry standards.
7.What is the process for return or replacement of RCLAMP0521PATCT?
All RCLAMP0521PATCT units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP0521PATCT, 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 RCLAMP0521PATCT part is unused and in its original packaging.
Return procedure for RCLAMP0521PATCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RCLAMP0521PATCT Tags
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