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Semtech Corporation RCLAMP2451ZATFT
- Part No.:
- RCLAMP2451ZATFT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0201 (0603 Metric)
- Datasheet:
-
RCLAMP2451ZATFT.pdf
- Description:
- TVS DIODE 24VWM 7VC SLP0603P2X3F
- Quantity:
- Payment:
- Shipping:
Inventory:116,707
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Product details
Overview
RCLAMP2451ZATFT from Semtech is a bidirectional ultra-low-capacitance TVS diode designed for ESD protection of single high-speed RF signal lines in NFC, FM antenna, and RF front-end circuits. It features a 24V working voltage, 0.35pF typical junction capacitance, 0.16Ω typical dynamic resistance, ±14kV contact/±18kV air ESD rating per IEC 61000-4-2, and clamps to 5V at 4A ESD pulse.
For engineers reviewing the RCLAMP2451ZATFT datasheet, pinout, applications, or equivalent options, key selection criteria include sub-0.4pF capacitance for minimal RF signal distortion, low clamping voltage under fast TLP pulses, 24V standoff compatibility with NFC resonator bias, and SLP0603P2X3F package suitability for space-constrained portable electronics layouts.
Technical Context
RCLAMP2451ZATFT employs silicon-avalanche TVS technology optimized for high-frequency signal integrity. Its symmetrical bidirectional structure enables AC-coupled NFC antenna protection without polarity constraints, while its 0.16Ω dynamic resistance ensures rapid energy shunting during sub-nanosecond ESD transients (0.2/100ns).
The device operates within -40°C to +85°C and delivers stable clamping performance across 24V DC bias conditions. Its 0.35pF capacitance at 0V reverse bias-measured at 1MHz-is validated to avoid harmonic distortion in 13.56MHz NFC and FM-band signals, confirmed by insertion loss data showing <0.5dB degradation up to 3GHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 24V - Enables use on NFC resonator circuits without clipping AC-coupled 24Vpk signals. |
| Junction Capacitance | 0.35pF typical at VR=0V, 1MHz - Minimizes RF signal attenuation and harmonic generation on NFC/FM antenna paths. |
| Dynamic Resistance | 0.16Ω typical - Ensures low-voltage clamping (5V at 4A) during ultrafast ESD events (0.2/100ns). |
| ESD Withstand | ±14kV contact / ±18kV air per IEC 61000-4-2 - Survives repeated human-body-model discharges in handheld device interfaces. |
| Clamping Voltage | 5V at 4A, 0.2/100ns TLP - Limits transient overvoltage seen by downstream NFC controller pins during ESD strike. |
| Package | SLP0603P2X3F (0.6 × 0.3 × 0.25 mm) - Ultra-compact footprint compatible with fine-pitch RF layout requirements. |
Pinout & Package
SLP0603P2X3F is a 2-pin, bottom-terminal, electrically symmetrical package with NiAu lead finish. Dimensions: 0.6 mm × 0.3 mm × 0.25 mm nominal height. Marking code applied per datasheet specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode/Cathode (symmetrical) | Electrically identical to Pin 2; bidirectional operation allows placement without orientation constraint on PCB. |
| Pin 2 | Anode/Cathode (symmetrical) | Interchangeable with Pin 1; supports AC-coupled NFC antenna line protection without polarity sensitivity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low capacitance | 0.35pF typical - Preserves signal integrity on 13.56MHz NFC and FM-band antenna traces without resonance shift. |
| Bidirectional ESD protection | Symmetrical 24V standoff - Eliminates polarity concerns when protecting AC-coupled RF signal pairs like NFC TX+/TX−. |
| High ESD endurance | ≥1000 strikes at IEC 61000-4-2 Level 4 - Supports long-term reliability in consumer-facing ports exposed to repeated handling. |
| Low dynamic resistance | 0.16Ω typical - Reduces clamping overshoot during nanosecond-scale ESD transients, enhancing downstream IC survivability. |
Applications
| NFC Antenna Protection | FM Antenna Interface |
|---|---|
Use Scenario: Protects NFC antenna loop connections between external metal housing and NFC controller IC in smartphones and wearables. IC Role / Device Role / Timing Role: Bidirectional TVS diode placed in series with antenna feed line to clamp ESD before it reaches sensitive NFC transceiver inputs. Use Value: 0.35pF capacitance avoids detuning of 13.56MHz resonant circuit; 24V working voltage accommodates peak antenna voltage swing without conduction. | Use Scenario: Shields FM antenna input path in portable radios and mobile devices from user-handling ESD events. IC Role / Device Role / Timing Role: Low-capacitance shunt protector mounted directly at antenna connector to suppress fast transients before RF front-end LNA. Use Value: Sub-0.4pF capacitance prevents insertion loss and frequency response degradation across 76–108MHz band. |
| RF Signal Line Protection | NFC Resonator Circuit |
Use Scenario: Guards high-speed differential RF signal lines (e.g., LTE/WiFi diversity antennas) against board-level ESD coupling. IC Role / Device Role / Timing Role: Single-line TVS placed adjacent to RF connector or matching network to limit transient voltage on signal path. Use Value: 5V clamping at 4A TLP ensures downstream RF switches and filters remain within safe operating voltage limits. | Use Scenario: Integrated into NFC resonator tank circuit where AC-coupled 24Vpk signals require non-intrusive protection. IC Role / Device Role / Timing Role: Symmetrical bidirectional clamp that conducts only during ESD overstress, remaining transparent during normal 13.56MHz carrier operation. Use Value: 24V working voltage matches resonator bias requirement; 0.16Ω dynamic resistance minimizes voltage drop during clamping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SP1003-01UTG | 0.3pF typical capacitance, 12V working voltage, ±12kV contact ESD rating | Lower working voltage limits use in 24V NFC resonators; better suited for 3.3V/5V digital I/O lines | Select when protecting lower-voltage high-speed interfaces where sub-0.3pF capacitance is prioritized over 24V standoff. |
| ESD5Z3.3T5G | 3.3V working voltage, 0.6pF typical capacitance, ±8kV contact ESD rating | Higher capacitance degrades RF signal fidelity; insufficient for 24V NFC bias conditions | Applicable only for low-voltage digital signal lines (e.g., USB D+/D−), not RF antenna protection. |
Compared with SP1003-01UTG and ESD5Z3.3T5G, RCLAMP2451ZATFT uniquely combines 24V working voltage, 0.35pF capacitance, and ±14kV ESD rating-making it the only option validated for NFC resonator protection without signal clipping or harmonic distortion.
Availability
RCLAMP2451ZATFT is available at Aetrix Electronics and suitable for NFC antenna protection, FM radio interface design, and RF signal line hardening requiring stable component supply, consistent tape-and-reel packaging (15,000 units per 7″ reel), and RoHS-compliant manufacturing.
Supply support for RCLAMP2451ZATFT 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, power management, and protection solutions.
RCLAMP2451ZATFT belongs to Semtech's RailClamp® family, engineered specifically for high-frequency ESD protection in portable wireless devices-prioritizing ultra-low capacitance, fast response, and minimal RF signal impact.
FAQ
What is the maximum continuous working voltage supported by RCLAMP2451ZATFT?
RCLAMP2451ZATFT supports a maximum continuous reverse stand-off voltage (VRWM) of 24V, verified per datasheet electrical characteristics at 25°C. This 24V rating enables direct integration into NFC resonator circuits where AC-coupled signals reach ±24V peaks without forward conduction or signal clipping. The device remains non-conductive below this threshold, preserving RF signal integrity during normal operation.
Does RCLAMP2451ZATFT require specific PCB layout considerations due to its 0201-size package?
Yes-RCLAMP2451ZATFT uses the SLP0603P2X3F package (0.6 × 0.3 mm), demanding precise stencil design and reflow control. Semtech recommends a 0.075mm laser-cut electropolished stencil with rectangular apertures and rounded corners, minimum area ratio of 0.66, and Type 4 solder paste. Land pad dimensions must follow the 0.620 × 0.250 mm pattern specified in the datasheet to ensure reliable solder joints and thermal performance for RCLAMP2451ZATFT.
How does RCLAMP2451ZATFT perform under real-world ESD stress beyond IEC 61000-4-2 testing?
RCLAMP2451ZATFT is rated for over 1000 ESD strikes at IEC 61000-4-2 Level 4 (±8kV contact), with no degradation in clamping voltage or leakage current. Transmission Line Pulse (TLP) testing confirms stable 0.16Ω dynamic resistance from 4A to 16A, ensuring consistent 5–7V clamping across multiple strike events. This endurance is validated in production-grade portable electronics where repeated user handling subjects RCLAMP2451ZATFT to cumulative ESD stress.
Can RCLAMP2451ZATFT be used to protect differential NFC signal pairs (e.g., TX+/TX−)?
RCLAMP2451ZATFT is a single-line device and must be used per signal line-not per pair. For differential NFC interfaces, two RCLAMP2451ZATFT units are required: one placed in series with TX+, another with TX−, both referenced to ground. Its symmetrical pinout eliminates orientation concerns, and its 0.35pF capacitance ensures matched phase response across both lines-critical for maintaining differential signal integrity in RCLAMP2451ZATFT-based NFC protection schemes.
Is RCLAMP2451ZATFT compliant with environmental regulations for global electronics manufacturing?
Yes-RCLAMP2451ZATFT is Pb-Free, Halogen Free, and fully compliant with RoHS and WEEE directives. Its NiAu lead finish and SLP0603P2X3F package meet JEDEC J-STD-020 reflow standards, and the device carries no REACH SVHC substances above threshold. Full compliance documentation, including material declarations and test reports, is available from Semtech for RCLAMP2451ZATFT upon request through Aetrix Electronics.
RCLAMP2451ZATFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0201 (0603 Metric)
- Series:
- RailClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 24V (Max)
- Voltage - Breakdown (Min):
- 25.5V
- Voltage - Clamping (Max) @ Ipp:
- 7V
- 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:
- SLP0603P2X3F
RCLAMP2451ZATFT FAQ
1.How can I place an order for RCLAMP2451ZATFT through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP2451ZATFT 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 RCLAMP2451ZATFT reliable?
The price and inventory of RCLAMP2451ZATFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP2451ZATFT is usually 5 days.
3.What payment methods are accepted for RCLAMP2451ZATFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP2451ZATFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP2451ZATFT?
RCLAMP2451ZATFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP2451ZATFT 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 RCLAMP2451ZATFT?
For technical support, including RCLAMP2451ZATFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP2451ZATFT requirements.
6.How does Aetrix verify that RCLAMP2451ZATFT is sourced from the original manufacturer or authorized distributors?
All RCLAMP2451ZATFT 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 RCLAMP2451ZATFT meets industry standards.
7.What is the process for return or replacement of RCLAMP2451ZATFT?
All RCLAMP2451ZATFT units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP2451ZATFT, 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 RCLAMP2451ZATFT part is unused and in its original packaging.
Return procedure for RCLAMP2451ZATFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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