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Semtech Corporation RCLAMP1521P.TCT
- Part No.:
- RCLAMP1521P.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
RCLAMP1521P.TCT.pdf
- Description:
- TVS DIODE 15VWM 30VC SLP1006P2
- Quantity:
- Payment:
- Shipping:
Inventory:30,319
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Product details
Overview
RCLAMP1521P.TCT from Semtech is a transient diverting suppressor (TDS) designed to protect single 15V-rated I/O or power lines against high-energy EOS events, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), and stable 27.5–28V clamping voltage across temperature and current range - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the RCLAMP1521P.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under 40A surge, low dynamic resistance (20mΩ), 175pF junction capacitance at 22V, DFN 1.6×1.6mm package compatibility with high-density USB-C layouts, and compliance with IEC 61000-4-4 (±4kV EFT) and IEC 61000-4-5 (±1kV surge).
Technical Context
RCLAMP1521P.TCT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A due to decreasing RDS(on), not fixed dynamic resistance.
The device operates over −40°C to +125°C, maintains <600nA reverse leakage at 22V, and delivers 1120W peak pulse power (8/20μs). Its functional architecture separates trigger threshold (25–27.9V VBR) from clamping behavior, enabling predictable protection for 15V bus systems without thermal derating penalties.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 15V - defines maximum continuous DC operating voltage of protected line without leakage or degradation |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures downstream 30V-tolerant ICs (e.g., USB PD controllers) remain within safe voltage margin |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds USB-IF and IEC system-level ESD test requirements |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for USB 2.0 signal integrity but not suitable for SuperSpeed differential pairs |
| Dynamic Resistance | 20mΩ - enables flat clamping curve and minimizes voltage overshoot during fast-rising transients |
| Package | DFN 1.6mm × 1.6mm × 0.55mm, 6-lead - supports high-density PCB layout with minimal board area vs. SOT-23 or SOIC alternatives |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to maximize current handling and minimize parasitic inductance |
| 4, 5, 6 | IN | Protected line input terminal; connects directly to VBus or I/O line; all three pins must be bonded to ensure full 40A rating |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A - eliminates need for over-spec'ing IPP to meet voltage thresholds |
| Temperature-stable protection | Clamping holds 27.5–28V from −40°C to +125°C - removes thermal derating uncertainty in industrial environments |
| Low dynamic resistance | 20mΩ enables sub-1V overshoot during 100A/μs dV/dt events - critical for protecting sensitive gate drivers and PMICs |
| High-energy surge capability | 1120W peak pulse power (8/20μs) - sustains multiple lightning-induced surges without parametric shift or failure |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Front-End Protection |
|---|---|
Use Scenario: Protecting 20V nominal VBus lines in USB-C receptacles exposed to ESD, cable discharge, and hot-plug transients. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed between connector and PD controller or load switch input. Use Value: Maintains 27.5–28V clamping at full 40A surge, keeping voltage below 30V damage threshold of common PD controllers (e.g., STUSB4500, CYPD3177). | Use Scenario: Safeguarding enable and input pins of industrial-grade load switches (e.g., TPS229xx, NX3008) against lightning-induced surges on remote sensor or actuator power rails. IC Role / Device Role / Timing Role: Fast-acting transient diverter placed upstream of load switch VIN/EN pins to prevent gate oxide rupture or latch-up. Use Value: Limits transient voltage to ≤28V while sinking 40A, preventing internal FET avalanche failure and ensuring uninterrupted power sequencing. |
| IoT Edge Node Power Bus Protection | Storage Device 12–15V Rail Protection |
Use Scenario: Securing 12–15V auxiliary power inputs in battery-powered IoT gateways subjected to ESD and induced surges in factory or field deployments. IC Role / Device Role / Timing Role: Standalone EOS protector on main DC input rail before buck converter or battery charger IC. Use Value: Delivers ±30kV ESD immunity and ±4kV EFT robustness without adding series impedance or affecting steady-state efficiency. | Use Scenario: Protecting SATA or M.2 NVMe storage module 12V/15V power inputs from hot-swap and backplane coupling transients in enterprise servers. IC Role / Device Role / Timing Role: Low-capacitance, high-power shunt clamp on bulk power rail adjacent to connector interface. Use Value: 175pF capacitance avoids resonance with typical 10–100μF bulk caps; 40A rating handles worst-case backplane surge injection per IEC 61000-4-5. |
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 | 22V working voltage, identical 40A/28V clamping, same DFN package - higher VRWM than RCLAMP1521P.TCT | Targets 20–22V USB PD buses; less suitable for 15V-only rails due to higher leakage at lower bias | Select when protecting 20–22V systems where tighter clamping margin vs. 30V ICs is required |
| uClamp2411ZA.TCT | 24V working voltage, 30A IPP, 32V clamping, smaller 1.0×0.6mm DFN - lower surge rating and higher VC | Better suited for CC/SBU lines in USB-C; insufficient for main VBus due to lower IPP and higher clamping | Use only for auxiliary signaling lines; not a drop-in replacement for RCLAMP1521P.TCT on power rails |
Compared with TDS2211P.C and uClamp2411ZA.TCT, RCLAMP1521P.TCT offers optimal balance of 15V system compatibility, 40A surge headroom, and 27.5–28V clamping - making it the preferred choice for cost-sensitive, space-constrained 15V industrial and USB-C power rail protection where precise voltage margin control is critical.
Availability
RCLAMP1521P.TCT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT edge node power buses requiring stable component supply, long-term lifecycle support, and consistent parametric performance across manufacturing lots.
Supply support for RCLAMP1521P.TCT 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.
RCLAMP1521P.TCT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 12–24V power and interface protection applications where clamping stability and temperature insensitivity are mandatory.
FAQ
What is the maximum continuous operating voltage for RCLAMP1521P.TCT?
RCLAMP1521P.TCT has a reverse stand-off voltage (VRWM) of 15V, meaning it is rated for continuous DC operation up to 15V on the protected line. Exceeding this voltage increases reverse leakage and risks premature triggering or degradation. The device breaks down at 25–27.9V (VBR), and clamps reliably at 27.5–28V during transients - making RCLAMP1521P.TCT ideal for 15V industrial rails and USB-C auxiliary power paths.
How does RCLAMP1521P.TCT differ from standard TVS diodes in clamping behavior?
RCLAMP1521P.TCT uses a triggered FET-based architecture instead of a pn-junction diode, resulting in near-constant clamping voltage (27.5–28V) from 24A to 40A and across −40°C to +125°C. Standard TVS diodes exhibit linear VC = VBR + IPP × RDYN, causing clamping to rise with current and temperature. This makes RCLAMP1521P.TCT more predictable for protecting 30V-tolerant ICs under real-world surge and thermal conditions.
Can RCLAMP1521P.TCT be used on USB SuperSpeed (SS) differential lanes?
No, RCLAMP1521P.TCT is not suitable for USB SuperSpeed TX/RX differential pairs. Its 175pF junction capacitance at 22V introduces excessive signal distortion and insertion loss at 5–10 Gbps. For SS lanes, Semtech recommends ultra-low-capacitance devices like RClamp3371ZC (<0.25pF). RCLAMP1521P.TCT is intended for single-ended 15V power or control lines such as VBus, EN, or RESET in USB-C and industrial systems.
What is the recommended PCB layout for RCLAMP1521P.TCT to achieve full 40A surge rating?
To achieve the full 40A (8/20μs) rating, all three IN pins (4, 5, 6) must be shorted together with a low-inductance trace to the protected line, and all three GND pins (1, 2, 3) must connect via multiple vias to an unbroken ground plane. Place RCLAMP1521P.TCT within 3mm of the connector. Avoid stubs or splits in the IN/GND paths - parasitic inductance above 2nH degrades clamping response and reduces effective surge current handling.
Is RCLAMP1521P.TCT compliant with environmental and safety standards?
Yes, RCLAMP1521P.TCT is Pb-free, halogen-free, and RoHS/WEEE compliant. Its molding compound meets UL 94V-0 flammability rating. It is qualified per IEC 61000-4-2 (±30kV ESD), IEC 61000-4-4 (±4kV EFT), and IEC 61000-4-5 (±1kV surge, 42Ω source), and operates from −40°C to +125°C. These certifications confirm RCLAMP1521P.TCT meets global regulatory and reliability requirements for industrial and consumer electronics.
RCLAMP1521P.TCT 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):
- 15V (Max)
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 30V
- Current - Peak Pulse (10/1000µs):
- 4A (8/20µs)
- Power - Peak Pulse:
- 120W
- 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
RCLAMP1521P.TCT FAQ
1.How can I place an order for RCLAMP1521P.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP1521P.TCT 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 RCLAMP1521P.TCT reliable?
The price and inventory of RCLAMP1521P.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP1521P.TCT is usually 5 days.
3.What payment methods are accepted for RCLAMP1521P.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP1521P.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP1521P.TCT?
RCLAMP1521P.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP1521P.TCT 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 RCLAMP1521P.TCT?
For technical support, including RCLAMP1521P.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP1521P.TCT requirements.
6.How does Aetrix verify that RCLAMP1521P.TCT is sourced from the original manufacturer or authorized distributors?
All RCLAMP1521P.TCT 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 RCLAMP1521P.TCT meets industry standards.
7.What is the process for return or replacement of RCLAMP1521P.TCT?
All RCLAMP1521P.TCT units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP1521P.TCT, 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 RCLAMP1521P.TCT part is unused and in its original packaging.
Return procedure for RCLAMP1521P.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RCLAMP1521P.TCT Tags
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