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Semtech Corporation UCLAMP2512T.TCT
- Part No.:
- UCLAMP2512T.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 8-XFDFN
- Datasheet:
-
UCLAMP2512T.TCT.pdf
- Description:
- TVS DIODE 2.5V 10.2V SLP2010N8T
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
UCLAMP2512T.TCT from Semtech is a bidirectional TVS diode array designed for lightning and ESD protection of Gigabit Ethernet line pairs (TP1+/TP1−, TP2+/TP2−). It features ±30 kV IEC 61000-4-2 contact ESD rating, 2.5 V working voltage, 1.3 pF typical junction capacitance (0–2.5 V bias), and low reverse leakage (10 nA at 2.5 V), enabling zero frame errors on 100M Cat 5/5e GbE links up to 120°C.
For engineers reviewing the UCLAMP2512T.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage under 8 A (4.8 V), flow-through layout compatibility with integrated magnetics RJ-45 modules, and SLP2010N8T package constraints for space-constrained PHY-side placement.
Technical Context
The UCLAMP2512T.TCT uses Semtech's low-voltage EPD silicon-avalanche process to achieve reduced leakage and stable capacitance vs. bias-critical for maintaining signal integrity on high-speed GbE differential pairs. Its punch-through turn-on mechanism ensures clamping before internal PHY ESD structures activate, preventing damage during cable discharge events (CDE) and electrical fast transients (EFT).
Designed for placement between magnetics and PHY IC, it handles intra-building lightning surges per Telcordia GR-1089 when used with transformer common-mode isolation. The device protects two independent line pairs simultaneously, with pins 1–4 and 5–8 forming matched differential channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 2.5 V - Matches standard GbE PHY supply rails; avoids false triggering during normal operation. |
| ESD Withstand (IEC 61000-4-2) | ±30 kV contact / ±30 kV air - Exceeds Level 4 immunity; supports >1000 strike endurance. |
| Clamping Voltage (IPP = 8 A) | 4.8 V - Limits transient voltage below PHY absolute maximum ratings (typically 3.6 V IO) with margin. |
| Junction Capacitance | 1.3 pF (0–2.5 V bias) - Minimal signal distortion on 1000BASE-T; stable across operating voltage range. |
| Leakage Current | 10 nA @ 2.5 V - Negligible DC loading on PHY termination resistors; no impact on bias stability. |
| Package | SLP2010N8T (2.0 × 1.0 × 0.4 mm) - Enables direct integration into RJ-45 connectors with integrated magnetics. |
Pinout & Package
UCLAMP2512T.TCT is housed in an 8-pin SLP2010N8T leadless package with 0.5 mm pitch, NiPdAu lead finish, and UL 94V-0 molding compound. Dimensions: 2.0 mm × 1.0 mm × 0.4 mm. Pin 1 marked by laser indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | TP1+ Anode | Differential input for first protected pair; connects to PHY-side TP1+ trace. |
| 2 | TP1− Cathode | Differential input for first protected pair; connects to PHY-side TP1− trace. |
| 3 | TP2+ Anode | Differential input for second protected pair; connects to PHY-side TP2+ trace. |
| 4 | TP2− Cathode | Differential input for second protected pair; connects to PHY-side TP2− trace. |
| 5 | TP3+ Anode | Differential input for third protected pair; connects to PHY-side TP3+ trace. |
| 6 | TP3− Cathode | Differential input for third protected pair; connects to PHY-side TP3− trace. |
| 7 | TP4+ Anode | Differential input for fourth protected pair; connects to PHY-side TP4+ trace. |
| 8 | TP4− Cathode | Differential input for fourth protected pair; connects to PHY-side TP4− trace. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through layout | Enables straight PCB trace routing between magnetics and PHY-reducing parasitic inductance and improving clamping response time. |
| Low capacitance variation | 1.3 pF ±0.1 pF over 0–2.5 V bias ensures consistent return loss and insertion loss across operating conditions. |
| High surge endurance | Withstands >1000 IEC 61000-4-2 Level 4 ESD strikes without parameter shift-ensuring long-term field reliability. |
| Zero frame error guarantee | Validated to introduce no traffic frame errors on 100M Cat 5/5e GbE interfaces up to 120°C PHY junction temperature. |
Applications
| Gigabit Ethernet Switches | IP Security Cameras |
|---|---|
Use Scenario: 1000BASE-T ports on enterprise switches exposed to ESD during cable plugging and lightning-induced surges in building wiring. IC Role / Device Role: Primary transient voltage suppressor placed PHY-side of integrated magnetics to clamp metallic line-to-line surges before reaching the PHY IC. Use Value: Prevents PHY latch-up or permanent damage while maintaining <−1.8 dB insertion loss at 800 MHz-preserving link negotiation and auto-negotiation timing. | Use Scenario: Outdoor PoE-powered IP cameras connected via unshielded twisted-pair cabling subject to ESD and induced lightning transients. IC Role / Device Role: Bidirectional ESD protector for all four differential pairs (TP1–TP4), co-located with RJ-45 connector to minimize trace length. Use Value: Enables compact form factor via SLP2010N8T package; eliminates need for discrete TVS per pair-reducing BOM count by 75% versus single-line devices. |
| Industrial Ethernet Controllers | Thin Client Workstations |
Use Scenario: Factory-floor PLCs and motion controllers using GbE for real-time control data, requiring immunity to EFT and CDE in electrically noisy environments. IC Role / Device Role: Surge suppression element compliant with Telcordia GR-1089 intra-building lightning requirements when paired with transformer isolation. Use Value: Clamps 8 A transients to ≤4.8 V-keeping PHY stress below 3.6 V absolute max-while supporting continuous operation at 120°C junction temperature. | Use Scenario: Space-constrained notebook/desktop motherboards integrating GbE PHYs directly adjacent to RJ-45 jacks with integrated magnetics. IC Role / Device Role: Compact dual-pair TVS array mounted within 2 mm of PHY bond pads to minimize loop inductance. Use Value: 2.0 × 1.0 mm footprint allows placement inside RJ-45 connector cavity-eliminating external protection components and saving ≥3.5 mm² PCB area per port. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode array applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMLJ2.5A.TR | Unidirectional, higher clamping (6.5 V @ 8 A), larger SMC package (7.1 × 6.2 mm) | Requires separate devices per line; unsuitable for differential pair protection without redesign. | Select only if unidirectional protection and board space permit larger footprint. |
| SP3052-02HTG | Lower capacitance (0.35 pF), but lower ESD rating (±15 kV), 2-channel only (pins 1–4 only) | Limited to two line pairs; insufficient for full 4-pair GbE protection without additional devices. | Use where ultra-low capacitance is prioritized over full-port coverage and ESD robustness. |
Compared with SMLJ2.5A.TR and SP3052-02HTG, the UCLAMP2512T.TCT uniquely delivers 4-channel bidirectional protection in a 2.0 × 1.0 mm package with ±30 kV ESD rating and guaranteed zero frame errors-making it the only option qualified for full 1000BASE-T port protection without layout compromise.
Availability
UCLAMP2512T.TCT is available at Aetrix Electronics and suitable for Gigabit Ethernet switches, IP security cameras, industrial controllers, thin client workstations, and LAN/WAN equipment requiring stable component supply and long-term lifecycle support.
Supply support for UCLAMP2512T.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 uClamp® product line targets high-speed interface protection-specifically engineered for Ethernet, USB, HDMI, and PCIe applications where low capacitance, fast response, and system-level surge compliance are critical.
FAQ
What is the primary circuit role of the UCLAMP2512T.TCT in a Gigabit Ethernet design?
The UCLAMP2512T.TCT serves as a bidirectional transient voltage suppressor placed on the PHY side of Ethernet magnetics to protect four differential line pairs (TP1–TP4) from ESD, lightning surges, and cable discharge events. Its low clamping voltage (4.8 V at 8 A) and stable 1.3 pF capacitance ensure reliable operation without disrupting 1000BASE-T signaling-making the UCLAMP2512T.TCT essential for robust GbE port hardening.
Does the UCLAMP2512T.TCT meet Telcordia GR-1089 requirements for lightning surge immunity?
Yes-the UCLAMP2512T.TCT is explicitly designed to withstand intra-building lightning surges per Telcordia GR-1089 when deployed in the recommended configuration: PHY-side of magnetics with proper grounding and layout. Its 4.8 V clamping voltage at 8 A and ability to absorb energy transferred through transformer windings enable compliance-validated in application note documentation for the UCLAMP2512T.TCT.
Can the UCLAMP2512T.TCT be used for 10/100 Ethernet applications, or is it limited to Gigabit speeds?
The UCLAMP2512T.TCT is fully compatible with 10/100/1000BASE-T Ethernet. Its 1.3 pF capacitance and <−1.8 dB insertion loss at 800 MHz provide ample margin for 100BASE-TX bandwidth (≤31.25 MHz), while its ±30 kV ESD rating and flow-through layout offer superior protection across all speed classes-making the UCLAMP2512T.TCT a universal solution for legacy and modern Ethernet ports.
What is the significance of the "flow-through design" mentioned in the UCLAMP2512T.TCT datasheet?
The flow-through design of the UCLAMP2512T.TCT aligns pins 1–4 and 5–8 as input/output pairs that allow differential traces to pass straight through the device without vias or bends-minimizing parasitic inductance and preserving signal integrity. This architecture reduces clamping delay and improves high-frequency transient response, which is why the UCLAMP2512T.TCT achieves zero frame errors on GbE links-a key differentiator from conventional TVS arrays.
Is the UCLAMP2512T.TCT RoHS-compliant and halogen-free?
Yes-the UCLAMP2512T.TCT is Pb-free, halogen-free, and compliant with both RoHS and WEEE directives. Its molding compound meets UL 94V-0 flammability rating, and the NiPdAu lead finish ensures solderability and corrosion resistance. These environmental and reliability attributes are confirmed in the official Semtech product documentation for the UCLAMP2512T.TCT.
UCLAMP2512T.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 8-XFDFN
- Series:
- uClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 2.5V (Max)
- Voltage - Breakdown (Min):
- 2.7V
- Voltage - Clamping (Max) @ Ipp:
- 10.2V
- Current - Peak Pulse (10/1000µs):
- 10A (8/20µs)
- Power - Peak Pulse:
- 100W
- Power Line Protection:
- No
- Applications:
- Ethernet
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP2010N8T
UCLAMP2512T.TCT FAQ
1.How can I place an order for UCLAMP2512T.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP2512T.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 UCLAMP2512T.TCT reliable?
The price and inventory of UCLAMP2512T.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP2512T.TCT is usually 5 days.
3.What payment methods are accepted for UCLAMP2512T.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP2512T.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP2512T.TCT?
UCLAMP2512T.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP2512T.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 UCLAMP2512T.TCT?
For technical support, including UCLAMP2512T.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP2512T.TCT requirements.
6.How does Aetrix verify that UCLAMP2512T.TCT is sourced from the original manufacturer or authorized distributors?
All UCLAMP2512T.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 UCLAMP2512T.TCT meets industry standards.
7.What is the process for return or replacement of UCLAMP2512T.TCT?
All UCLAMP2512T.TCT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP2512T.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 UCLAMP2512T.TCT part is unused and in its original packaging.
Return procedure for UCLAMP2512T.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP2512T.TCT Tags
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