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Semtech Corporation UCLAMP1211Z.TNT
- Part No.:
- UCLAMP1211Z.TNT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0201 (0603 Metric)
- Datasheet:
-
UCLAMP1211Z.TNT.pdf
- Description:
- TVS DIODE 12VWM 25VC SLP0603P2X3
- Quantity:
- Payment:
- Shipping:
Inventory:3,226
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Product details
Overview
UCLAMP1211Z.TNT from Semtech is a transient diverting suppressor designed for single-line 12V EOS protection in high-reliability I/O and power bus applications. It delivers ±30kV IEC 61000-4-2 ESD immunity, clamps at 14.5V (IPP = 24A), maintains <20mΩ dynamic resistance, and operates from –40°C to +125°C - enabling robust USB Type-C VBUS and industrial load switch input protection.
For engineers reviewing the UCLAMP1211Z.TNT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability across temperature, low dynamic resistance under surge, junction capacitance (175pF), and DFN 1.6×1.6mm 6-lead package compatibility with space-constrained USB PD and IoT designs.
Technical Context
The UCLAMP1211Z.TNT 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 (14.5–14.8V) across 24–40A peak pulse current (tp = 8/20μs) due to decreasing RDS(on).
It features bidirectional protection with 12V working voltage (VRWM), 13.3V typical breakdown (VBR), and 175pF junction capacitance at 12V reverse bias - optimized for DC power rails and low-speed signal lines where capacitance tolerance permits, not high-speed data lanes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 12 V - defines maximum continuous DC operating voltage on protected line without leakage or conduction. |
| Clamping Voltage (VC) | 14.5 V at IPP = 24A - limits transient overvoltage seen by downstream ICs during 8/20μs surges. |
| Peak Pulse Current (IPP) | 40 A (8/20μs) - supports compliance with IEC 61000-4-5 ±1kV surge testing on 42Ω source impedance. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - eliminates need for secondary ESD stages in front-end protection. |
| Dynamic Resistance (RDYN) | 20 mΩ - ensures minimal voltage rise under high-current transients, critical for protecting low-voltage FET gates. |
| Junction Capacitance (CJ) | 175 pF @ 12V - suitable for VBUS, CC, SBU, or load switch inputs; not appropriate for USB SS or DP/DM lines. |
Pinout & Package
UCLAMP1211Z.TNT is housed in a RoHS-compliant, halogen-free DFN 1.6 mm × 1.6 mm × 0.55 mm 6-lead package with exposed thermal pad (not electrically connected). All pins must be soldered for full surge rating: three GND pins provide low-inductance return path; three IN pins parallel the protected line to maximize current sharing and minimize trace inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground reference for trigger circuit and shunt FET source; must be connected to low-impedance PCB ground plane via multiple vias. |
| 4, 5, 6 | IN | Parallel-connected input terminals for protected line (e.g., VBUS or load switch input); all three must be routed together to minimize loop inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.3V across 24–40A surge range - prevents overvoltage failure of sensitive 12V-rated controllers. |
| Low dynamic resistance | 20 mΩ enables effective energy diversion below damage thresholds of internal FETs in load switches and PD controllers. |
| High-temperature stability | Clamping remains stable from –40°C to +125°C - eliminates derating concerns in industrial or automotive under-hood environments. |
| Integrated FET-based protection | Replaces multi-device TVS+series resistor solutions with single-chip, low-parasitic protection for compact USB Type-C and IoT layouts. |
Applications
| USB Type-C VBUS Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 12V USB PD 3.0 VBUS lines against lightning-induced surges and connector ESD events in portable docking stations. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at Type-C receptacle, shunting surge energy to ground before reaching PD controller and buck converter. Use Value: Maintains 14.5V clamping at 125°C - avoids overvoltage latch-up of 15V-rated PD controllers where standard TVS would exceed 18V. |
Use Scenario: Safeguarding input of 12V-rated industrial load switches (e.g., ON Semi NIS5132) against EOS in remote metering and robotics control modules. IC Role / Device Role / Timing Role: Primary front-end protector absorbing 40A 8/20μs transients, preventing gate oxide rupture and drain-source avalanche in the load switch FET. Use Value: 20 mΩ RDYN limits voltage overshoot to <1V above clamp level - keeps stress on load switch within safe SOA limits during fast-rising transients. |
| IoT Sensor Hub Power Rail Protection | 12V Industrial Control Bus Protection |
|
Use Scenario: Securing 12V auxiliary power rail feeding multiple sensor nodes in smart building gateways exposed to EFT bursts per IEC 61000-4-4. IC Role / Device Role / Timing Role: Bidirectional EOS suppressor on main 12V distribution node, coordinating with local ceramic decoupling to suppress sub-100ns EFT edges. Use Value: ±4kV EFT immunity ensures uninterrupted operation during 5/50ns burst noise - critical for maintaining sensor data integrity in noisy factory environments. |
Use Scenario: Hardening 12V backplane power bus in programmable logic controllers (PLCs) against induced surges from relay switching and motor drive noise. IC Role / Device Role / Timing Role: System-level transient suppressor mounted at bus entry point, limiting voltage excursions to protect downstream PMICs and microcontrollers. Use Value: 1120W peak pulse power rating handles repeated 1kV/42Ω surges without degradation - extends field lifetime in harsh industrial settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS1211P | Same FET-based architecture, identical 12V VRWM, but rated for 24A IPP (vs. 40A for UCLAMP1211Z.TNT); clamping voltage 14.8V at 24A. | Suitable for lower-energy applications like USB-C CC lines or low-power IoT peripherals where 40A surge margin is unnecessary. | Select TDS1211P when board space or cost optimization outweighs need for highest surge headroom. |
| SM712-TR | Standard bipolar TVS array (12V/15V), 30A IPP, higher dynamic resistance (~100mΩ), clamping rises to ~23V at 24A and worsens with temperature. | Acceptable for non-critical 12V rails where clamping voltage margin >8V is tolerable and thermal derating is managed externally. | Choose SM712-TR only if legacy design reuse or dual-rail (RS-485) capability is required; avoid where precise clamping is mandatory. |
Compared with TDS1211P and SM712-TR, UCLAMP1211Z.TNT provides superior surge handling (40A vs. 24A/30A), tighter clamping stability (±0.3V vs. ±2V drift), and lower dynamic resistance - making it the preferred choice for next-generation USB PD, industrial load switches, and mission-critical 12V power rails.
Availability
UCLAMP1211Z.TNT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT sensor hub power rails requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for UCLAMP1211Z.TNT 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 protection, signal integrity, and power management.
The UCLAMP family targets high-reliability transient suppression using active FET-based architectures - engineered specifically for USB PD, industrial power rails, and automotive body electronics where traditional TVS limitations compromise system robustness.
FAQ
What is the maximum continuous operating voltage for UCLAMP1211Z.TNT?
The UCLAMP1211Z.TNT has a reverse stand-off voltage (VRWM) of 12 V, meaning it can safely operate on DC power rails up to 12 V without leakage or conduction. This makes UCLAMP1211Z.TNT ideal for protecting 12V VBUS lines in USB PD applications and industrial 12V control buses where sustained voltage must remain within strict limits.
How does UCLAMP1211Z.TNT achieve stable clamping voltage across temperature?
UCLAMP1211Z.TNT uses a precision-triggered shunt FET instead of a passive PN-junction, resulting in clamping voltage that stays within 14.5–14.8 V from –40°C to +125°C. Unlike TVS diodes whose VC rises with temperature, UCLAMP1211Z.TNT's FET-based architecture maintains consistent performance - a key advantage verified in its datasheet's clamping vs. temperature curves.
Can UCLAMP1211Z.TNT be used on high-speed data lines like USB SuperSpeed?
No - UCLAMP1211Z.TNT has 175 pF junction capacitance at 12 V reverse bias, which would severely degrade signal integrity on USB 3.x, PCIe, or DisplayPort lanes. For those interfaces, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25 pF). UCLAMP1211Z.TNT is intended exclusively for 12V power and low-speed control lines such as VBUS, CC, SBU, or load switch inputs.
What is the recommended PCB layout for optimal surge performance with UCLAMP1211Z.TNT?
Place UCLAMP1211Z.TNT as close as possible to the protected connector. Route all three IN pins (4,5,6) together in a single short, wide trace; connect all three GND pins (1,2,3) directly to a solid ground plane using ≥4 vias. Avoid stubs or splits - this minimizes parasitic inductance and ensures full 40A surge current sharing across parallel paths, as specified in the official layout guidelines for UCLAMP1211Z.TNT.
Is UCLAMP1211Z.TNT compatible with lead-free reflow processes?
Yes - UCLAMP1211Z.TNT is fully RoHS-compliant and rated for standard lead-free reflow profiles (JEDEC J-STD-020). Its DFN 1.6×1.6mm package uses lead-free matte tin plating and UL 94V-0 molding compound, supporting peak temperatures up to 260°C. The device's thermal design accommodates typical reflow cycles without compromising EOS performance or reliability of UCLAMP1211Z.TNT.
UCLAMP1211Z.TNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0201 (0603 Metric)
- Series:
- uClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 25V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 125W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 19pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP0603P2X3
UCLAMP1211Z.TNT FAQ
1.How can I place an order for UCLAMP1211Z.TNT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP1211Z.TNT 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 UCLAMP1211Z.TNT reliable?
The price and inventory of UCLAMP1211Z.TNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP1211Z.TNT is usually 5 days.
3.What payment methods are accepted for UCLAMP1211Z.TNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP1211Z.TNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP1211Z.TNT?
UCLAMP1211Z.TNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP1211Z.TNT 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 UCLAMP1211Z.TNT?
For technical support, including UCLAMP1211Z.TNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP1211Z.TNT requirements.
6.How does Aetrix verify that UCLAMP1211Z.TNT is sourced from the original manufacturer or authorized distributors?
All UCLAMP1211Z.TNT 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 UCLAMP1211Z.TNT meets industry standards.
7.What is the process for return or replacement of UCLAMP1211Z.TNT?
All UCLAMP1211Z.TNT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP1211Z.TNT, 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 UCLAMP1211Z.TNT part is unused and in its original packaging.
Return procedure for UCLAMP1211Z.TNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP1211Z.TNT Tags
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