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Semtech Corporation RCLAMP01811ZA.F
- Part No.:
- RCLAMP01811ZA.F
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0201 (0603 Metric)
- Datasheet:
-
RCLAMP01811ZA.F.pdf
- Description:
- 1.8V 1.2PF MAX. 2.5A SLP0603P2X3
- Quantity:
- Payment:
- Shipping:
Inventory:5,611
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Product details
Overview
RCLAMP01811ZA.F from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 18V-rated I/O or power lines in USB Type-C, USB PD, and industrial interfaces. It delivers ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), and maintains a stable 25.5V clamping voltage across temperature and current range.
For engineers reviewing the RCLAMP01811ZA.F datasheet, pinout, applications, or equivalent options, key selection criteria include its constant-clamp architecture, ultra-low dynamic resistance (20mΩ), DFN 1.6×1.6mm package, and suitability for load switch input protection where low VC stability under surge and thermal stress is critical.
Technical Context
RCLAMP01811ZA.F uses a surge-rated FET as the primary protection element, activated by a precision trigger circuit upon EOS detection. Its clamping voltage remains nearly constant-25.5V at 40A (8/20μs)-due to the FET's decreasing RDS(on) under surge, unlike conventional TVS diodes whose VC rises linearly with IPP.
The device operates over −40°C to +125°C, with reverse stand-off voltage of 18V, breakdown voltage of 20.5V (typ), and junction capacitance of 175pF at 18V. All six pins are functionally grouped: Pins 1–3 as GND, Pins 4–6 as IN, enabling robust parallel current sharing and low-inductance PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 18V - defines maximum continuous DC bus voltage it can protect without leakage or degradation |
| Clamping Voltage (40A, 8/20μs) | 25.5V - ensures protected ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surge |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - meets highest system-level ESD immunity requirements for consumer and industrial ports |
| Peak Pulse Current | 40A (8/20μs) - supports compliance with IEC 61000-4-5 Level 4 surge testing on 22Ω source impedance |
| Dynamic Resistance | 20mΩ - enables flat VC vs. IPP curve and minimizes voltage overshoot during fast-rising transients |
| Junction Capacitance | 175pF @ 18V - low enough for USB PD VBUS line protection without signal integrity impact |
Pinout & Package
Package: DFN 1.6 mm × 1.6 mm × 0.55 mm, 6-lead, Pb-free, RoHS-compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected to minimize inductance and maximize 40A capability |
| Pins 4, 5, 6 | IN | Protected line input (e.g., VBUS); parallel connection ensures uniform current sharing and thermal distribution |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <±0.5V from 24A to 40A (8/20μs), eliminating design margin uncertainty from VC drift |
| Temperature-stable protection | VC remains stable from −40°C to +125°C - avoids derating or over-spec'ing in thermally demanding environments |
| Low dynamic resistance | 20mΩ enables sub-1V overshoot during 100A/μs dI/dt events, critical for protecting sensitive load switches |
| High-energy surge handling | 1120W peak pulse power rating supports repeated 40A surges without parametric shift or failure |
| Space-efficient packaging | 1.6×1.6mm footprint saves >60% board area vs. legacy SO-8 or SOT-23 TVS solutions for same performance class |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting the 20V-capable VBUS line in USB-C receptacles against lightning-induced surges and connector hot-plug ESD. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at the connector, shunting surge energy to ground before it reaches the PD controller or e-fuse. Use Value: Maintains 25.5V clamping at full 40A surge and 125°C ambient-prevents latch-up or gate oxide damage in downstream 24V-tolerant PD ICs. |
Use Scenario: Safeguarding the input of high-side load switches (e.g., HS2950P) in remote meters and robotics against 1kV/42Ω line surges. IC Role / Device Role / Timing Role: Primary front-end protector that limits voltage seen by the load switch's internal MOSFET drain, preventing avalanche failure. Use Value: 20mΩ dynamic resistance ensures <0.8V additional drop during 40A surge-keeps switch VDS within safe SOA limits. |
| IoT Edge Node Power Rail Protection | Tablet/Notebook VBUS Line Protection |
Use Scenario: Securing 12–18V auxiliary power rails in battery-powered IoT gateways exposed to ESD during field servicing or docking. IC Role / Device Role / Timing Role: Standalone EOS protector on main DC input, operating independently of system power sequencing. Use Value: ±30kV ESD rating and −40°C to +125°C operation ensure reliability in uncontrolled environmental deployments. |
Use Scenario: Protecting the VBUS line in ultraportable notebooks where space constraints prohibit larger TVS arrays. IC Role / Device Role / Timing Role: Single-device solution replacing multi-diode TVS stacks, minimizing BOM count and routing complexity. Use Value: 175pF capacitance avoids resonance or attenuation on 20V/3A PD lines, preserving power negotiation timing integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | 22V working voltage, 27.5V clamping at 40A, same DFN-6 package | Targeted for 20–22V USB PD systems; higher VRWM than RCLAMP01811ZA.F | Select when protecting 20V+ buses where tighter VBR margin is required; not drop-in due to different VRWM and clamping profile |
| uClamp2411ZA | 24V working voltage, 33V clamping at 20A, 6-pin DFN but lower IPP rating | Designed for CC/SBU lines-not rated for VBUS-level surge energy | Use only for auxiliary signal lines; insufficient for 40A/1120W VBUS protection-RCLAMP01811ZA.F provides 2× peak power handling |
Compared with TDS2211P and uClamp2411ZA, RCLAMP01811ZA.F offers optimal balance of 18V system compatibility, 40A surge capacity, and thermal stability-making it the preferred choice for compact, high-reliability VBUS protection where clamping voltage margin and board space are jointly constrained.
Availability
RCLAMP01811ZA.F is available at Aetrix Electronics and suitable for USB Type-C power delivery interfaces, industrial load switch inputs, and IoT edge node power rails requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/REACH compliance.
Supply support for RCLAMP01811ZA.F 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 protection, signal integrity, and power management.
RCLAMP01811ZA.F belongs to Semtech's Transient Diverting Suppressor (TDS) product line-engineered to replace conventional TVS diodes in high-energy EOS applications where stable clamping, temperature resilience, and minimal board footprint are essential.
FAQ
What is the maximum continuous operating voltage for RCLAMP01811ZA.F?
RCLAMP01811ZA.F has a reverse stand-off voltage (VRWM) of 18V, meaning it is rated for continuous DC operation up to 18V on the protected line. Exceeding this voltage risks increased leakage current and potential degradation. The device begins clamping above ~20.5V (typical VBR) and fully activates at surge levels, making it ideal for 12–18V industrial and USB PD auxiliary rails.
How does RCLAMP01811ZA.F differ from standard TVS diodes in surge response?
Unlike standard TVS diodes-which exhibit rising clamping voltage with increasing peak pulse current due to fixed dynamic resistance-RCLAMP01811ZA.F uses a triggered FET architecture. This results in near-constant clamping voltage (25.5V at both 24A and 40A) and ultra-low dynamic resistance (20mΩ), delivering predictable protection across surge magnitude and temperature extremes.
Can RCLAMP01811ZA.F be used to protect USB Type-C VBUS lines compliant with USB PD 3.0?
Yes. RCLAMP01811ZA.F is explicitly validated for USB Type-C VBUS protection in Semtech reference designs. Its 18V VRWM, 25.5V clamping, and ±30kV ESD rating meet USB PD 3.0 system-level immunity requirements. It is commonly paired with low-capacitance RClamp3371ZC on SuperSpeed lanes and uClamp2411ZA on CC lines in complete port protection schemes.
What is the recommended PCB layout for RCLAMP01811ZA.F to achieve full 40A surge capability?
To achieve rated 40A (8/20μs) performance, all three GND pins (1–3) and all three IN pins (4–6) must be connected with short, wide copper traces. Place RCLAMP01811ZA.F within 3mm of the connector, use ≥4 vias per GND pad to inner ground planes, and avoid stubs or splits in the IN/GND paths. Layout adherence ensures minimal parasitic inductance and uniform current sharing across parallel pins.
Is RCLAMP01811ZA.F compatible with lead-free reflow processes?
Yes. RCLAMP01811ZA.F is Pb-free, halogen-free, and RoHS/WEEE compliant, qualified for standard JEDEC J-STD-020D reflow profiles with peak temperatures up to 260°C. Its UL 94V-0 molding compound and lead-free finish (NiPdAu) ensure robust solder joint integrity and long-term reliability under thermal cycling in production assembly.
RCLAMP01811ZA.F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0201 (0603 Metric)
- Series:
- RailClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 1.8V (Max)
- Voltage - Breakdown (Min):
- 2.2V
- Voltage - Clamping (Max) @ Ipp:
- 5.8V
- Current - Peak Pulse (10/1000µs):
- 8A (8/20µs)
- Power - Peak Pulse:
- 45W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 0.55pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP0603P2X3F
RCLAMP01811ZA.F FAQ
1.How can I place an order for RCLAMP01811ZA.F through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP01811ZA.F 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 RCLAMP01811ZA.F reliable?
The price and inventory of RCLAMP01811ZA.F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP01811ZA.F is usually 5 days.
3.What payment methods are accepted for RCLAMP01811ZA.F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP01811ZA.F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP01811ZA.F?
RCLAMP01811ZA.F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP01811ZA.F 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 RCLAMP01811ZA.F?
For technical support, including RCLAMP01811ZA.F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP01811ZA.F requirements.
6.How does Aetrix verify that RCLAMP01811ZA.F is sourced from the original manufacturer or authorized distributors?
All RCLAMP01811ZA.F 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 RCLAMP01811ZA.F meets industry standards.
7.What is the process for return or replacement of RCLAMP01811ZA.F?
All RCLAMP01811ZA.F units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP01811ZA.F, 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 RCLAMP01811ZA.F part is unused and in its original packaging.
Return procedure for RCLAMP01811ZA.F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RCLAMP01811ZA.F Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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