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Semtech Corporation RCLAMP3521P.TNT
- Part No.:
- RCLAMP3521P.TNT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
RCLAMP3521P.TNT.pdf
- Description:
- TVS DIODE 3.5VWM 13VC SLP1006P2
- Quantity:
- Payment:
- Shipping:
Inventory:32,744
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Product details
Overview
RCLAMP3521P.TNT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), and stable 27.5–28V clamping across temperature and current range - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the RCLAMP3521P.TNT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, real-world clamping behavior vs. conventional TVS, and validated alternatives for 22V bus protection in USB PD, IoT, and industrial equipment designs.
Technical Context
RCLAMP3521P.TNT 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 - enabling near-constant clamping voltage independent of peak pulse current magnitude. Its dynamic resistance is just 20mΩ (8/20μs), far lower than standard TVS diodes.
The device operates from −40°C to +125°C with reverse stand-off voltage of 22V, breakdown at 25–27.9V, and junction capacitance of 175pF at 22V/1MHz - optimized for low-leakage (130–600nA) and high-energy surge handling without thermal derating penalties.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches USB PD bus nominal voltage and protects downstream controllers rated up to 22V. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays flat across temperature and current, avoiding voltage overshoot that damages PD controllers. |
| ESD Rating | ±30kV contact & air (IEC 61000-4-2) - exceeds industrial and consumer ESD immunity requirements without external staging. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD interfaces. |
| Junction Capacitance | 175pF at 22V/1MHz - low enough for DC power rail protection without affecting load switch response or bus stability. |
| Dynamic Resistance | 20mΩ (8/20μs) - enables minimal voltage rise under surge, delivering superior clamping vs. TVS diodes with fixed RDYN. |
| Leakage Current | 130–600nA at 22V - ensures negligible standby power loss in battery-powered IoT and portable devices. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, RoHS-compliant, UL 94V-0 molding compound, lead-free finish, tape-and-reel packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground terminals - all three must be connected to minimize parasitic inductance and maximize 40A surge current path. |
| 4, 5, 6 | IN | Protected line input - pins tied together to handle full surge energy; placement adjacent to connector minimizes coupling into adjacent traces. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Enables constant clamping voltage (27.5–28V) across 1–40A surge range - eliminates linear VC = VBR + IPP×RDYN drift seen in TVS diodes. |
| Low dynamic resistance | 20mΩ ensures minimal IR drop during 40A transients - critical for protecting sensitive 22V-rated PD controllers and load switches. |
| Stable performance over temperature | Clamping remains flat from −40°C to +125°C - removes thermal derating uncertainty in industrial and automotive-adjacent applications. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz) - protects against repetitive fast transients in motor drives and PLC I/O modules. |
| Small-footprint DFN package | 1.6mm × 1.6mm saves >50% board area vs. SOT-23 or SOIC TVS solutions - ideal for space-constrained USB Type-C connectors and IoT edge nodes. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Front-End Protection |
|---|---|
Use Scenario: Protecting VBUS lines in USB-C receptacles supporting up to 20V/5A PD negotiation, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed directly at connector, clamping transients before they reach PD controller ICs and buck converters. Use Value: Maintains 27.5–28V clamping at 40A and 125°C - prevents overvoltage damage to 22V-rated controllers where conventional TVS would exceed 38V at same conditions. |
Use Scenario: Safeguarding input terminals of high-side load switches (e.g., HS2950P) in remote meters, robotics, and factory automation systems. IC Role / Device Role / Timing Role: First-line transient diverter upstream of the load switch FET, limiting gate-source and drain-source voltage stress during surge events. Use Value: Keeps clamping voltage below the 30V+ absolute maximum rating of internal switch FETs - avoids latch-up or permanent gate oxide damage during 1kV/42Ω surges. |
| IoT Edge Node Power Rail Protection | Storage Device DC Bus Protection |
Use Scenario: Securing 12–24V DC input rails in battery-backed smart sensors and wireless gateways operating in electrically noisy environments. IC Role / Device Role / Timing Role: Standalone transient suppressor on main power entry point, replacing multi-stage TVS + MOV solutions. Use Value: Delivers 40A surge handling and ±30kV ESD in a single 1.6mm² footprint - reduces BOM count and PCB area while improving reliability over discrete approaches. |
Use Scenario: Protecting SATA or NVMe SSD power inputs against hot-plug transients, ESD from handling, and backplane coupling in enterprise storage enclosures. IC Role / Device Role / Timing Role: Low-capacitance (175pF), low-leakage (≤600nA) suppressor on +3.3V/+12V rails - preserves signal integrity and minimizes standby current drain. Use Value: Enables robust 22V-rated protection without adding significant capacitance to high-speed power domains - avoids voltage droop or regulator instability during transient conduction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Same manufacturer, identical 22V working voltage, 40A rating, and DFN-6 package - direct functional match with identical pinout and thermal profile. | Designed explicitly for USB PD and load switch protection per Semtech application notes; validated in TDS2211P reference schematics. | Select when requiring Semtech's documented TDS architecture validation and full design support for high-reliability industrial deployments. |
| SMAJ22A | Standard unidirectional TVS diode; 22V standoff, 35.1V clamping at 12.5A (8/20μs); higher RDYN causes clamping to rise to ~42V at 40A and increase with temperature. | Suitable for cost-sensitive, non-critical 22V rail protection where clamping voltage margin >15V is acceptable and thermal derating is managed externally. | Choose only if board space allows larger SMA package and system-level analysis confirms 42V clamping does not exceed downstream IC limits at max ambient. |
Compared with TDS2211P and SMAJ22A, RCLAMP3521P.TNT delivers identical FET-based clamping performance and pin compatibility as TDS2211P but with Semtech's RClamp series marking and tape-and-reel logistics - whereas SMAJ22A requires layout redesign, thermal derating, and accepts significantly higher clamping voltage under surge.
Availability
RCLAMP3521P.TNT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT edge node power rails requiring stable component supply, long-term lifecycle assurance, and compliance with IEC 61000-4-2/4-4/4-5 standards.
Supply support for RCLAMP3521P.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 analog and mixed-signal ICs for precision sensing, protection, and connectivity - with leadership in transient suppression, LoRa® RF, and signal integrity solutions.
RCLAMP3521P.TNT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power and interface protection where stable clamping, temperature independence, and compact size are critical.
FAQ
What is the exact clamping voltage of RCLAMP3521P.TNT at 40A surge current?
RCLAMP3521P.TNT clamps at 27.6–28V under 40A peak pulse current (tp = 1.2/50μs voltage + 8/20μs current combination waveform, RS = 2Ω), as guaranteed by design and confirmed in the Semtech datasheet. This value remains stable across −40°C to +125°C - unlike TVS diodes whose clamping rises with temperature and current. The consistent 27.6V ceiling ensures reliable protection of 22V-rated PD controllers and load switches.
Is RCLAMP3521P.TNT pin-compatible with TDS2211P?
Yes, RCLAMP3521P.TNT is pin-compatible with TDS2211P: both use the identical DFN 1.6mm × 1.6mm × 0.55mm 6-lead package with GND on pins 1–3 and IN on pins 4–6. Layout, thermal pad, and PCB land pattern are interchangeable. RCLAMP3521P.TNT shares the same electrical specifications, including 22V working voltage, 40A surge rating, and 27.5–28V clamping - making it a direct replacement in existing TDS2211P designs.
Can RCLAMP3521P.TNT be used on high-speed data lines like USB SuperSpeed or PCIe?
No, RCLAMP3521P.TNT is not suitable for high-speed data lines. With 175pF junction capacitance at 22V, it would severely degrade signal integrity on differential pairs operating above 100MHz. It is intended exclusively for DC power rails and low-frequency I/O lines such as USB PD VBUS, load switch inputs, or industrial sensor power feeds. For SuperSpeed lanes, Semtech recommends RClamp3371ZC (<0.25pF) instead of RCLAMP3521P.TNT.
What is the maximum operating temperature for RCLAMP3521P.TNT?
RCLAMP3521P.TNT is rated for continuous operation from −40°C to +125°C ambient temperature, with junction temperature reaching up to +150°C under surge conditions. Its clamping voltage remains stable across this full range - a key advantage over TVS diodes, which exhibit rising clamping and reduced IPP capability above 85°C. This makes RCLAMP3521P.TNT suitable for under-hood automotive-adjacent, industrial control, and outdoor IoT applications.
Does RCLAMP3521P.TNT require a thermal pad or heatsink on the PCB?
No, RCLAMP3521P.TNT does not require a thermal pad or external heatsink. Unlike TVS diodes that dissipate surge energy in the PN junction, RCLAMP3521P.TNT channels transient current through a low-RDS(on) FET, minimizing localized heating. Semtech's datasheet explicitly states "no thermal pad is needed" - instead, designers should ensure low-inductance grounding via multiple vias from pins 1–3 to an internal ground plane, as specified in the layout guidelines for RCLAMP3521P.TNT.
RCLAMP3521P.TNT 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):
- 3.5V (Max)
- Voltage - Breakdown (Min):
- 4.5V
- Voltage - Clamping (Max) @ Ipp:
- 13V
- Current - Peak Pulse (10/1000µs):
- 4A (8/20µs)
- Power - Peak Pulse:
- 50W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 0.33pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP1006P2
RCLAMP3521P.TNT FAQ
1.How can I place an order for RCLAMP3521P.TNT through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP3521P.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 RCLAMP3521P.TNT reliable?
The price and inventory of RCLAMP3521P.TNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP3521P.TNT is usually 5 days.
3.What payment methods are accepted for RCLAMP3521P.TNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP3521P.TNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP3521P.TNT?
RCLAMP3521P.TNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP3521P.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 RCLAMP3521P.TNT?
For technical support, including RCLAMP3521P.TNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP3521P.TNT requirements.
6.How does Aetrix verify that RCLAMP3521P.TNT is sourced from the original manufacturer or authorized distributors?
All RCLAMP3521P.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 RCLAMP3521P.TNT meets industry standards.
7.What is the process for return or replacement of RCLAMP3521P.TNT?
All RCLAMP3521P.TNT units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP3521P.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 RCLAMP3521P.TNT part is unused and in its original packaging.
Return procedure for RCLAMP3521P.TNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RCLAMP3521P.TNT Tags
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