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Semtech Corporation RCLAMP1851Y.TFT
- Part No.:
- RCLAMP1851Y.TFT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 2-XFDFN
- Datasheet:
-
RCLAMP1851Y.TFT.pdf
- Description:
- TVS DIODE 18VWM 12V SLP0603P2X3E
- Quantity:
- Payment:
- Shipping:
Inventory:2,681
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Product details
Overview
RCLAMP1851Y.TFT from Semtech is a bidirectional ultra-low-capacitance TVS diode designed for ESD protection of NFC antenna circuits and high-speed RF signal lines. It features a working voltage of ±18 V, typical junction capacitance of 0.35 pF at 0 V, dynamic resistance <0.1 Ω, ESD withstand of ±18 kV (IEC 61000-4-2 contact), and resides in an SLP0603P2X3E package (0.6 × 0.3 × 0.25 mm).
For engineers reviewing the RCLAMP1851Y.TFT datasheet, pinout, applications, or equivalent options, key selection criteria include low RF signal distortion, sub-0.1 Ω dynamic resistance for minimal clamping voltage rise under ESD stress, and compatibility with 18 V AC-coupled NFC resonator circuits without signal clipping.
Technical Context
The RCLAMP1851Y.TFT employs silicon-avalanche solid-state technology optimized for transient suppression on single-line NFC interfaces. Its bidirectional structure supports AC-coupled signals up to ±18 V, and its ultra-low capacitance ensures negligible harmonic distortion in 13.56 MHz NFC bands.
Designed specifically for board-level protection of NFC antenna traces, it delivers fast response time (<1 ns), withstands ≥1000 IEC 61000-4-2 Level 4 ESD strikes, and maintains stable clamping performance across temperature (–40°C to +85°C junction).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | ±18 V - Matches NFC resonator circuit peak AC swing without forward conduction or signal clipping. |
| Junction Capacitance | 0.35 pF (typ @ 0 V) - Minimizes RF insertion loss and preserves NFC signal integrity at 13.56 MHz. |
| Dynamic Resistance | <0.1 Ω (typ) - Ensures low clamping voltage rise during ESD transients, protecting downstream NFC controller inputs. |
| ESD Withstand | ±18 kV contact per IEC 61000-4-2 - Meets highest industrial/user-interface ESD immunity requirements. |
| Clamping Voltage | 11 V (at 16 A TLP) - Limits voltage seen by protected IC during worst-case ESD event. |
| Package | SLP0603P2X3E (0.6 × 0.3 × 0.25 mm) - Enables placement directly at NFC antenna feed point with minimal parasitic inductance. |
Pinout & Package
Package: SLP0603P2X3E - 2-pin ultra-small leadless package with NiAu finish, bottom-view symmetry, and 0.22 mm pad pitch. Dimensions: 0.60 mm × 0.30 mm × 0.25 mm nominal height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode/Cathode (bidirectional) | Electrically symmetrical terminal - interchangeable connection to NFC antenna line or controller side; no polarity orientation required. |
| Pin 2 | Anode/Cathode (bidirectional) | Paired terminal completing the bidirectional ESD path; connects to GND reference plane via shortest possible trace. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low capacitance | 0.35 pF enables NFC/RF signal integrity preservation without harmonic distortion or detuning. |
| Bidirectional ESD protection | Supports AC-coupled NFC antenna circuits operating at ±18 V peak without DC bias dependency. |
| Sub-0.1 Ω dynamic resistance | Minimizes voltage overshoot during ESD events, critical for safeguarding sensitive NFC controller I/O pins. |
| High ESD endurance | Rated for ≥1000 IEC 61000-4-2 Level 4 ESD strikes - ensures long-term reliability in consumer handheld environments. |
Applications
| NFC Antenna Protection | FM Antenna Signal Line |
|---|---|
Use Scenario: Protecting NFC antenna feed points on smartphones and wearables exposed to user-handling ESD. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between antenna matching network and NFC controller IC. Use Value: Prevents latch-up or damage to NFC controller while maintaining 13.56 MHz resonance due to 0.35 pF capacitance. | Use Scenario: ESD protection of FM radio antenna input traces in portable media devices. IC Role / Device Role / Timing Role: Low-capacitance shunt device guarding analog RF front-end against human-body-model discharges. Use Value: Avoids FM signal attenuation or frequency drift thanks to sub-0.4 pF loading and symmetric clamping behavior. |
| High-Speed Data Line | RF Front-End Interface |
Use Scenario: Protecting single-ended high-speed data lines (e.g., I²C clock or reset lines near NFC modules). IC Role / Device Role / Timing Role: Standalone ESD suppressor on signal paths sharing proximity with NFC antennas. Use Value: Delivers <11 V clamping at 16 A TLP with no signal degradation-critical for timing-sensitive control lines. | Use Scenario: Guarding RF signal paths between antenna switches and NFC transceivers in multi-band mobile platforms. IC Role / Device Role / Timing Role: Low-inductance, low-capacitance interface protector co-located with RF matching components. Use Value: Maintains impedance match and return loss performance (S21 > –0.5 dB up to 2 GHz) while providing ±18 kV ESD immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPD1E05U06DPYR | 0.4 pF capacitance, ±5.5 V working voltage, 12 kV ESD rating | Targeted for lower-voltage USB/IO lines-not suitable for ±18 V NFC resonators | Select only for sub-6 V signal rails where higher capacitance is acceptable. |
| SZ1.8SMCG-TP | 1.8 V working voltage, 100 pF capacitance, unidirectional | Designed for DC-biased power rail protection-not compatible with AC-coupled NFC antenna operation | Use only for low-voltage supply rail clamping; incompatible with bidirectional RF signal paths. |
Compared with TPD1E05U06DPYR and SZ1.8SMCG-TP, the RCLAMP1851Y.TFT uniquely combines ±18 V working voltage, 0.35 pF capacitance, and bidirectional symmetry-making it the only validated option for NFC antenna loop protection without signal clipping or detuning.
Availability
RCLAMP1851Y.TFT is available at Aetrix Electronics and suitable for NFC antenna protection, FM radio front-end design, and high-speed RF signal line safeguarding requiring stable component supply across consumer electronics production cycles.
Supply support for RCLAMP1851Y.TFT 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 semiconductor company specializing in high-performance analog and mixed-signal semiconductors for power management, protection, and sensing applications.
The RCLAMP® product line was engineered specifically for ultra-low-capacitance, high-reliability ESD protection of RF and high-speed digital interfaces-including NFC, USB, HDMI, and antenna signal paths-in portable and wireless devices.
FAQ
What is the primary application of the RCLAMP1851Y.TFT?
The RCLAMP1851Y.TFT is primarily designed for ESD protection of Near Field Communication (NFC) antenna circuits. Its ±18 V working voltage, 0.35 pF capacitance, and bidirectional architecture allow it to protect AC-coupled NFC resonators without signal clipping or harmonic distortion-making it ideal for smartphones, wearables, and contactless payment terminals where NFC functionality must remain robust under repeated ESD exposure.
Does the RCLAMP1851Y.TFT require specific PCB layout considerations?
Yes-the RCLAMP1851Y.TFT demands careful PCB layout to preserve its RF performance. Place it directly at the NFC antenna feed point with minimum trace length to ground, use symmetric 0.22 mm pad spacing matching the SLP0603P2X3E land pattern, and avoid vias or stubs near the device. Semtech recommends a 0.205 mm × 0.273 mm stencil aperture for reliable solder joint formation given its 0.6 × 0.3 mm footprint and 0.25 mm height.
Is the RCLAMP1851Y.TFT compatible with automated SMT assembly?
Yes-the RCLAMP1851Y.TFT is qualified for standard reflow soldering processes and compatible with automated SMT assembly. Its NiAu lead finish and SLP0603P2X3E package meet IPC-7351B Class B standards. Semtech provides detailed stencil aperture recommendations (0.205 mm × 0.273 mm) and land pattern guidelines to ensure consistent solder paste release and void-free joints during high-volume manufacturing.
How does the RCLAMP1851Y.TFT perform under repeated ESD stress?
The RCLAMP1851Y.TFT is rated to withstand over 1000 ESD strikes at IEC 61000-4-2 Level 4 (±15 kV air / ±8 kV contact) without parameter degradation. This endurance is verified through accelerated life testing and reflects its silicon-avalanche construction, which avoids wear-out mechanisms common in polymer-based or multilayer varistor solutions-ensuring long-term reliability in consumer-facing interfaces.
Can the RCLAMP1851Y.TFT be used on non-NFC RF lines such as Bluetooth or Wi-Fi antennas?
The RCLAMP1851Y.TFT may be used on other RF signal lines like Bluetooth or Wi-Fi antennas only if the operating voltage remains within ±18 V and signal frequencies stay below 2 GHz. Its 0.35 pF capacitance and low insertion loss (≤ –0.5 dB up to 2 GHz) support such use, but its ±18 V rating exceeds typical Bluetooth/Wi-Fi baseband voltage ranges-so system-level validation of clamping behavior and RF match is required before deployment.
RCLAMP1851Y.TFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 2-XFDFN
- Series:
- RailClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 18V (Max)
- Voltage - Breakdown (Min):
- 23V (Typ)
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 3A (8/20µs)
- Power - Peak Pulse:
- 60W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 0.35pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP0603P2X3E
RCLAMP1851Y.TFT FAQ
1.How can I place an order for RCLAMP1851Y.TFT through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP1851Y.TFT 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 RCLAMP1851Y.TFT reliable?
The price and inventory of RCLAMP1851Y.TFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP1851Y.TFT is usually 5 days.
3.What payment methods are accepted for RCLAMP1851Y.TFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP1851Y.TFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP1851Y.TFT?
RCLAMP1851Y.TFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP1851Y.TFT 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 RCLAMP1851Y.TFT?
For technical support, including RCLAMP1851Y.TFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP1851Y.TFT requirements.
6.How does Aetrix verify that RCLAMP1851Y.TFT is sourced from the original manufacturer or authorized distributors?
All RCLAMP1851Y.TFT 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 RCLAMP1851Y.TFT meets industry standards.
7.What is the process for return or replacement of RCLAMP1851Y.TFT?
All RCLAMP1851Y.TFT units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP1851Y.TFT, 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 RCLAMP1851Y.TFT part is unused and in its original packaging.
Return procedure for RCLAMP1851Y.TFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RCLAMP1851Y.TFT Tags
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