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Semtech Corporation RCLAMP2594N.TCT
- Part No.:
- RCLAMP2594N.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 10-XDFN Exposed Pad
- Datasheet:
-
RCLAMP2594N.TCT.pdf
- Description:
- TVS DIODE 5V 8.5V 10-SLF3020P10T
- Quantity:
- Payment:
- Shipping:
Inventory:2,835
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Product details
Overview
RClamp2594N.TCT from Semtech is a 4-channel, low-capacitance ESD and surge protection array designed for high-speed Ethernet data lines operating at 5 V. It delivers IEC 61000-4-2 ±30 kV (contact/air), IEC 61000-4-4 4 kV EFT, and IEC 61000-4-5 35 A (8/20 µs) lightning protection with 3 pF max capacitance and 0.05 Ω typical dynamic resistance-enabling robust signal integrity in Gigabit and 2.5GbE interfaces.
For engineers reviewing the RClamp2594N.TCT datasheet, pinout, applications, or equivalent options, this device serves as a critical secondary-level TVS solution for differential Ethernet pairs where low clamping voltage (7.5–8.5 V @ 35 A), minimal PCB footprint (DFN 3.0 × 2.0 mm), and sub-5 V ESD clamping (4.2–4.7 V @ TLP) are mandatory.
Technical Context
The RClamp2594N.TCT integrates four independent bidirectional steering diode paths with a shared snap-back TVS element, enabling low-voltage clamping via crow-bar action during high-energy transients. Its architecture supports simultaneous protection of two differential pairs (Line 1–2 and Line 3–4) without cross-talk coupling.
Each channel features a 5 V reverse stand-off voltage (VRWM), 6.5–11.5 V breakdown (VBR), and 75–250 mA holding current (IH), ensuring stable operation under continuous bias while triggering reliably during fast-rising ESD/EFT events. The 0.05 Ω dynamic resistance minimizes voltage overshoot during TLP pulses up to 16 A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 5 V VRWM - matches standard Ethernet PHY supply rails and ensures no leakage or conduction during normal operation. |
| ESD Rating | ±30 kV IEC 61000-4-2 (contact/air) - exceeds industrial immunity requirements for handheld and field-deployable equipment. |
| Surge Current | 35 A (8/20 µs) - handles lightning-induced surges on Ethernet ports per IEC 61000-4-5 Level 3/4. |
| Capacitance | ≤3 pF (at 0 V, 1 MHz) - preserves signal integrity for >1.25 Gbps differential signaling without measurable eye degradation. |
| Clamping Voltage | 7.5–8.5 V @ 35 A (8/20 µs) - limits stress on downstream PHY ICs below absolute maximum ratings. |
| Dynamic Resistance | 0.05 Ω (typical, TLP 4–16 A) - reduces transient-induced voltage overshoot (V = L·di/dt) in compact PCB layouts. |
| Package | DFN 3.0 × 2.0 × 0.4 mm, 10-lead - enables dense placement near RJ-45 magnetics with minimal parasitic inductance. |
Pinout & Package
Package: DFN 3.0 × 2.0 × 0.4 mm, 10-lead, NiPdAu lead finish, RoHS/WEEE compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Line 1 Input | Input terminal for first differential pair; connects to PHY-side trace of Line 1 (e.g., TX+). |
| Pin 10 | Line 1 Output | Output terminal for Line 1; routes to magnetics or connector side, completing differential path. |
| Pin 2 | Line 2 Input | Input terminal for second differential pair (e.g., TX−); paired with Pin 9 for full differential protection. |
| Pin 9 | Line 2 Output | Output terminal for Line 2; maintains signal continuity while enabling ESD/surge shunting to ground. |
| Pins 3 & 8 | Center Tab (NC) | Non-connected thermal pad; electrically isolated-no PCB connection required for functionality. |
| Pin 4 | Line 3 Input | Input for third line (e.g., RX+); forms protected differential pair with Pin 7. |
| Pin 7 | Line 3 Output | Output for Line 3; routed unbroken to maintain impedance control and minimize stub length. |
| Pin 5 | Line 4 Input | Input for fourth line (e.g., RX−); completes quad-line protection set with Pin 6. |
| Pin 6 | Line 4 Output | Output for Line 4; symmetric layout with Pins 1/10 and 2/9 ensures balanced transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Snap-back TVS architecture | Enables sub-8.5 V clamping at 35 A surge current, reducing stress on 3.3 V/5 V PHY I/O structures. |
| 0.05 Ω dynamic resistance | Minimizes voltage overshoot during nanosecond-scale ESD events, critical for maintaining PHY latch-up immunity. |
| 3 pF max junction capacitance | Supports clean signal transmission up to 2.5 GbE without equalization penalty or jitter accumulation. |
| DFN 3.0 × 2.0 mm footprint | Reduces PCB area by >40% vs. SOIC-8 alternatives, enabling placement directly adjacent to integrated magnetics. |
| ±30 kV ESD withstand | Eliminates need for external pre-treatment or shielding in unattended industrial Ethernet nodes. |
Applications
| Gigabit Ethernet PHY Protection | 2.5GbE Industrial Switch Ports |
|---|---|
|
Use Scenario: Protecting 1000BASE-T PHY transceivers in enterprise switches against ESD discharge from plugging/unplugging RJ-45 cables. IC Role / Device Role / Timing Role: Secondary-level transient suppressor placed between PHY IC and integrated magnetics, clamping fast-rising ESD before it reaches sensitive CMOS I/O. Use Value: Prevents permanent damage to PHY ESD structures while maintaining <1 ns response time and <3 pF loading on differential pairs. |
Use Scenario: Securing 2.5GBASE-T uplink ports in factory automation gateways exposed to frequent cable hot-plug events in dusty, high-static environments. IC Role / Device Role / Timing Role: Quad-channel rail clamp providing simultaneous protection for all four differential lanes (TX+/TX−/RX+/RX−) with matched clamping characteristics. Use Value: Ensures uninterrupted link negotiation and BER <10⁻¹² under repeated ±30 kV contact ESD stress, verified per IEC 61000-4-2. |
| Integrated Magnetics Modules | LVDS-Based Industrial Camera Interfaces |
|
Use Scenario: Embedding in compact RJ-45 connectors with built-in magnetics for space-constrained edge devices like PoE-powered IP cameras. IC Role / Device Role / Timing Role: On-board surge protector mounted directly on the connector PCB, minimizing trace inductance between clamp and transformer center taps. Use Value: Achieves 35 A (8/20 µs) lightning surge handling without derating, leveraging transformer attenuation while adding fail-safe clamping. |
Use Scenario: Protecting LVDS video links between machine vision sensors and FPGA-based frame grabbers in robotic inspection systems. IC Role / Device Role / Timing Role: Low-capacitance ESD guard for 650 Mbps LVDS clock/data pairs, preserving edge rate and common-mode rejection. Use Value: Maintains <100 mVpp differential noise margin at 350 MHz while surviving >10,000 ESD strikes per pin in production test environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD and surge protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SP3052-04UTG (Littelfuse) | Higher capacitance (5.5 pF), lower surge rating (20 A), same 5 V VRWM and DFN-10 package. | Less suitable for 2.5GbE due to bandwidth limitation; acceptable for 1000BASE-T with margin. | Select when cost sensitivity outweighs 2.5 GbE support and PCB area is not constrained. |
| TPD4E05U06DQAR (TI) | Lower ESD rating (±12 kV), lower clamping (5.5 V), 0.6 pF capacitance, but only 2-channel (requires two units for 4-line coverage). | Better for ultra-high-speed SerDes; insufficient for IEC 61000-4-5 lightning protection. | Choose only for ESD-only scenarios below 1 GbE where minimal capacitance is prioritized over surge robustness. |
Compared with SP3052-04UTG and TPD4E05U06DQAR, the RClamp2594N.TCT uniquely balances 35 A surge capability, ±30 kV ESD immunity, and 3 pF capacitance in a single 4-channel DFN-making it the only option qualified for full IEC 61000-4-2/4-4/4-5 compliance in compact Gigabit+ Ethernet designs.
Availability
RClamp2594N.TCT is available at Aetrix Electronics and suitable for Gigabit Ethernet PHY protection, 2.5GbE industrial switch ports, and integrated magnetics modules requiring stable component supply across extended temperature ranges (−40°C to +125°C).
Supply support for RClamp2594N.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.
The RClamp2594N.TCT belongs to Semtech's RailClamp® family-engineered specifically for high-speed data line protection in networking, industrial, and automotive communication interfaces where low capacitance and fast transient response are essential.
FAQ
What is the primary circuit role of the RClamp2594N.TCT in an Ethernet design?
The RClamp2594N.TCT functions as a secondary-level transient voltage suppressor placed between the Ethernet PHY IC and integrated magnetics. It provides bidirectional ESD and surge protection for four high-speed differential data lines (e.g., TX+/TX−/RX+/RX−) while maintaining signal integrity through ultra-low capacitance (≤3 pF) and fast snap-back clamping action. Its role is to shunt transient energy away from the PHY before it causes latch-up or permanent damage.
Does the RClamp2594N.TCT require external biasing or control signals to operate?
No, the RClamp2594N.TCT is a passive, always-on protection device with no external bias or enable requirements. It operates solely based on its intrinsic silicon-avalanche and snap-back TVS characteristics. When a transient exceeds its 5 V reverse stand-off voltage (VRWM), it automatically enters low-impedance conduction mode-clamping the line voltage to ≤8.5 V without any power supply, ground connection beyond the internal path, or configuration overhead.
Can the RClamp2594N.TCT be used for USB 3.0 or PCIe Gen3 interfaces?
No, the RClamp2594N.TCT is not recommended for USB 3.0 or PCIe Gen3. Its 3 pF capacitance exceeds the strict ≤0.3 pF requirement for PCIe Gen3 differential pairs and may degrade eye diagram margins at 5+ Gbps. It is specifically characterized and validated for Ethernet applications up to 2.5 GbE (including Gigabit and 2.5GBASE-T), where its 3 pF loading and 7.5–8.5 V clamping voltage meet system-level immunity targets without compromising link training.
How does the RClamp2594N.TCT handle differential versus common-mode transients?
The RClamp2594N.TCT protects each line individually with respect to ground, making it effective against both differential-mode transients (e.g., line-to-line ESD) and common-mode surges (e.g., cable discharge to chassis). Its internal steering diode + TVS architecture routes transient current from any I/O pin to ground, with clamping specified for line-to-ground (7.5–8.5 V @ 35 A) and line-to-line (same path) conditions. For full common-mode suppression, it must be used in conjunction with properly designed Bob Smith termination on the magnetics side.
What is the significance of the "0.05 Ω dynamic resistance" specification for the RClamp2594N.TCT?
The 0.05 Ω typical dynamic resistance (RDYN) quantifies the RClamp2594N.TCT's ability to limit voltage overshoot during fast-rising transients like ESD. Using V = L·di/dt, lower RDYN reduces the peak clamping voltage seen by the protected PHY-especially critical in compact PCB layouts where trace inductance cannot be fully eliminated. This value is measured via TLP testing (4–16 A), confirming consistent low-impedance conduction across the operational surge range of the RClamp2594N.TCT.
RCLAMP2594N.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 10-XDFN Exposed Pad
- Series:
- RailClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6.5V
- Voltage - Clamping (Max) @ Ipp:
- 8.5V
- Current - Peak Pulse (10/1000µs):
- 35A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- Yes
- Applications:
- Ethernet
- Capacitance @ Frequency:
- 2.1pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-SLF3020P10T
RCLAMP2594N.TCT FAQ
1.How can I place an order for RCLAMP2594N.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for RCLAMP2594N.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 RCLAMP2594N.TCT reliable?
The price and inventory of RCLAMP2594N.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RCLAMP2594N.TCT is usually 5 days.
3.What payment methods are accepted for RCLAMP2594N.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RCLAMP2594N.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RCLAMP2594N.TCT?
RCLAMP2594N.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RCLAMP2594N.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 RCLAMP2594N.TCT?
For technical support, including RCLAMP2594N.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RCLAMP2594N.TCT requirements.
6.How does Aetrix verify that RCLAMP2594N.TCT is sourced from the original manufacturer or authorized distributors?
All RCLAMP2594N.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 RCLAMP2594N.TCT meets industry standards.
7.What is the process for return or replacement of RCLAMP2594N.TCT?
All RCLAMP2594N.TCT units undergo pre-shipment inspection (PSI). If there is an issue with RCLAMP2594N.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 RCLAMP2594N.TCT part is unused and in its original packaging.
Return procedure for RCLAMP2594N.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
RCLAMP2594N.TCT Tags
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