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Semtech Corporation UCLAMP2501ZATFT
- Part No.:
- UCLAMP2501ZATFT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0201 (0603 Metric)
- Datasheet:
-
UCLAMP2501ZATFT.pdf
- Description:
- 1-LINE 2.5V 4.5PF 0.11 OHMS SLP0
- Quantity:
- Payment:
- Shipping:
Inventory:5,588
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Product details
Overview
UCLAMP2501ZATFT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 25V-rated I/O or power lines in USB Type-C, USB PD, and industrial interfaces. It delivers ±30kV IEC 61000-4-2 ESD immunity, clamps at 28V under 40A (8/20μs), maintains <20mΩ dynamic resistance, and operates from –40°C to +125°C in a 1.6mm × 1.6mm DFN-6 package.
For engineers reviewing the UCLAMP2501ZATFT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability across temperature and peak current, low leakage (<600nA at 25V), junction capacitance (175pF), and compatibility with load switch input protection and high-voltage USB PD bus architectures.
Technical Context
The UCLAMP2501ZATFT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant - 27.6–28V - across 24A to 40A peak pulse current (8/20μs) due to decreasing RDS(on) under surge conditions.
It features a three-terminal input-to-ground architecture (pins 4–6 = IN, pins 1–3 = GND), enabling robust 40A surge handling via parallel pin connection. Its 175pF junction capacitance at 22V and 1MHz, combined with <600nA reverse leakage at VRWM, supports stable operation in high-speed, high-voltage interface protection without signal integrity compromise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 25 V - defines maximum continuous DC operating voltage on protected line without leakage or conduction. |
| Clamping Voltage | 28 V at 40 A (8/20 μs) - ensures downstream ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surge. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - meets highest industrial and consumer ESD immunity requirements without degradation. |
| Dynamic Resistance | 20 mΩ - enables flat clamping response and minimizes voltage rise under increasing surge current. |
| Junction Capacitance | 175 pF at 22 V, 1 MHz - low enough for USB PD bus protection without distorting 5–20 V DC signaling or degrading transient response. |
| Reverse Leakage | 600 nA max at 25 V - ensures negligible standby power loss and avoids false triggering in high-impedance sensing paths. |
| Package | DFN-6 (1.6 mm × 1.6 mm × 0.55 mm) - enables ultra-compact placement adjacent to connectors with minimal PCB area and thermal mass. |
Pinout & Package
UCLAMP2501ZATFT is housed in a Pb-free, RoHS-compliant 6-lead DFN package (1.6 mm × 1.6 mm × 0.55 mm) with exposed thermal pad not required - energy dissipation occurs within the silicon FET structure. All six terminals are electrically active: three dedicated to ground and three to the protected input line.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | Ground (GND) | Low-inductance return path for surge current; all three must be connected to maximize 40A capability and minimize ground bounce. |
| Pins 4, 5, 6 | Input (IN) | Protected line connection (e.g., VBUS in USB PD); parallel routing ensures uniform current sharing and optimal clamping performance. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient diversion | Replaces traditional TVS diodes with active shunt switching - eliminates linear VC = VBR + IPP×RDYN dependency and enables flat clamping. |
| Temperature-stable clamping | Clamps at 27.6–28 V from –40°C to +125°C - eliminates derating concerns in automotive or industrial ambient environments. |
| High-energy surge rating | 40 A (8/20 μs) and ±1 kV (1.2/50 μs, RS = 42 Ω) - satisfies IEC 61000-4-5 Level 3/4 for industrial equipment and USB PD system-level compliance. |
| Low dynamic resistance | 20 mΩ - reduces IR drop during surge, preserving voltage margin between clamp level and IC absolute maximum ratings. |
| Ultra-low leakage | <600 nA at 25 V - prevents loading of high-impedance enable or sense lines in load switch and e-fuse applications. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–25 V VBUS lines in USB-C receptacles supporting up to 100 W power delivery against lightning-induced surges and connector hot-plug transients. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at the connector, clamping overvoltage before it reaches the PD controller or buck converter. Use Value: Maintains 28 V clamping across full 40 A surge and –40°C to +125°C, preventing controller latch-up or gate oxide damage where standard TVS would exceed 38 V at elevated temperature. |
Use Scenario: Safeguarding input terminals of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT edge nodes exposed to 42 Ω source impedance surges. IC Role / Device Role / Timing Role: Primary front-end protector absorbing >1120 W peak pulse energy (8/20 μs) to prevent internal FET avalanche failure. Use Value: Limits voltage across load switch drain-source to ≤28 V during ±1 kV surges, avoiding destructive breakdown while enabling compact 1.6 mm² footprint vs. larger TVS arrays. |
| High-Voltage Industrial I/O Protection | USB PD Controller Interface Protection |
Use Scenario: Shielding 24 V PLC analog/digital I/O channels from field-induced transients in factory automation and building control systems. IC Role / Device Role / Timing Role: Single-device solution for unsymmetrical line protection per IEC 61000-4-5, replacing multi-component TVS+capacitor networks. Use Value: Delivers ±4 kV EFT immunity (IEC 61000-4-4) and stable 28 V clamping independent of ambient temperature - critical for uncooled enclosures operating at 85°C+. |
Use Scenario: Securing CC, VCONN, and SBU lines in USB PD controller ICs (e.g., STUSB4500, CYPD3177) against ESD and EOS events during cable insertion or fault conditions. IC Role / Device Role / Timing Role: Secondary protection stage complementing low-capacitance RClamp devices on SuperSpeed lanes, handling higher-energy threats on auxiliary lines. Use Value: Provides 25 V working voltage margin above 20 V PD bus, ensuring no forward conduction during normal operation while delivering ±30 kV ESD robustness per IEC 61000-4-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | 22 V working voltage, 27.5–28 V clamping at 40 A, same DFN-6 package | Optimized for 20–22 V USB PD buses; lower VRWM limits use in 25 V systems | Select when protecting 22 V nominal rails where tighter clamping margin is required below 25 V IC thresholds. |
| UCLAMP3301ZATFT | 33 V working voltage, 36 V clamping at 40 A, identical footprint and pinout | Suitable for 28–33 V industrial buses; higher VRWM increases risk of leakage or false triggering in 25 V designs | Choose only if system operating voltage exceeds 25 V and clamping above 28 V is acceptable for downstream components. |
Compared with TDS2211P and UCLAMP3301ZATFT, UCLAMP2501ZATFT uniquely balances 25 V system compatibility, 28 V clamping headroom, and full-temperature-stable performance - making it the optimal choice for next-generation USB PD 3.1 and 24 V industrial I/O where both voltage margin and thermal reliability are critical.
Availability
UCLAMP2501ZATFT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and high-voltage I/O protection requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for UCLAMP2501ZATFT 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 high-performance analog and mixed-signal ICs for precision protection, signal integrity, and wireless infrastructure.
The UCLAMP series is part of Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes with FET-based active clamping for superior voltage stability, temperature resilience, and surge energy handling in high-reliability interfaces.
FAQ
What is the maximum continuous operating voltage for UCLAMP2501ZATFT?
The UCLAMP2501ZATFT has a reverse stand-off voltage (VRWM) of 25 V, meaning it can safely block up to 25 V DC or RMS AC continuously without significant leakage or conduction. This makes it suitable for 24 V industrial buses and 20–25 V USB PD applications where sustained voltage levels approach but do not exceed this threshold. Exceeding 25 V risks premature triggering or accelerated degradation.
How does UCLAMP2501ZATFT achieve stable clamping voltage across temperature?
UCLAMP2501ZATFT achieves stable clamping by using a surge-rated FET as the main conduction element, controlled by a precision trigger circuit. As surge current rises, the FET's RDS(on) decreases, counteracting voltage rise - resulting in clamping of 27.6–28 V from –40°C to +125°C. This contrasts with TVS diodes whose clamping increases linearly with temperature due to fixed dynamic resistance.
Can UCLAMP2501ZATFT replace standard TVS diodes in USB PD designs?
Yes - UCLAMP2501ZATFT is specifically validated for USB PD bus protection, offering superior performance over standard TVS diodes: it clamps at 28 V (vs. >38 V for typical 22 V TVS at 125°C), maintains stability across temperature, and handles 40 A (8/20 μs). Its 1.6 mm × 1.6 mm DFN-6 footprint allows direct layout replacement in many existing designs with improved reliability.
What is the significance of the 20 mΩ dynamic resistance in UCLAMP2501ZATFT?
The 20 mΩ dynamic resistance (RDYN) in UCLAMP2501ZATFT reflects the effective on-resistance of its internal shunt FET under surge conditions. This ultra-low value ensures minimal IR drop during high-current transients, enabling consistent 27.6–28 V clamping across the full 1–40 A range and preserving safe voltage margins for downstream 25 V-tolerant ICs like USB PD controllers and load switches.
Is UCLAMP2501ZATFT compatible with automated optical inspection (AOI) and reflow processes?
Yes - UCLAMP2501ZATFT is packaged in a standard RoHS-compliant DFN-6 with solderable side-wettable flanks and Pb-free terminations. Its 1.6 mm × 1.6 mm body and 0.55 mm height are compatible with industry-standard AOI systems and reflow profiles (J-STD-020 moisture sensitivity level 1). The marking "U25" and date code support full traceability in high-volume manufacturing.
UCLAMP2501ZATFT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0201 (0603 Metric)
- Series:
- µClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 2.5V (Max)
- Voltage - Breakdown (Min):
- 2.7V
- Voltage - Clamping (Max) @ Ipp:
- 7.5V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 40W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 25pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP0603P2X3F
UCLAMP2501ZATFT FAQ
1.How can I place an order for UCLAMP2501ZATFT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP2501ZATFT 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 UCLAMP2501ZATFT reliable?
The price and inventory of UCLAMP2501ZATFT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP2501ZATFT is usually 5 days.
3.What payment methods are accepted for UCLAMP2501ZATFT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP2501ZATFT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP2501ZATFT?
UCLAMP2501ZATFT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP2501ZATFT 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 UCLAMP2501ZATFT?
For technical support, including UCLAMP2501ZATFT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP2501ZATFT requirements.
6.How does Aetrix verify that UCLAMP2501ZATFT is sourced from the original manufacturer or authorized distributors?
All UCLAMP2501ZATFT 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 UCLAMP2501ZATFT meets industry standards.
7.What is the process for return or replacement of UCLAMP2501ZATFT?
All UCLAMP2501ZATFT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP2501ZATFT, 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 UCLAMP2501ZATFT part is unused and in its original packaging.
Return procedure for UCLAMP2501ZATFT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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