My Inquiry
My Account
Semtech Corporation UCLAMP1211P.TNT
- Part No.:
- UCLAMP1211P.TNT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 0402 (1006 Metric)
- Datasheet:
-
UCLAMP1211P.TNT.pdf
- Description:
- TVS DIODE 12VWM 28.5VC SLP1006P2
- Quantity:
- Payment:
- Shipping:
Inventory:9,672
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
UCLAMP1211P.TNT from Semtech is a transient diverting suppressor designed for high-energy EOS protection on single 12V I/O or power lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5V clamping voltage at 24A, 20mΩ dynamic resistance, and DFN 1.6×1.6×0.55mm 6-lead package - deployed in USB Type-C PD input protection.
For engineers reviewing the UCLAMP1211P.TNT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance for flat VC vs. IPP behavior, DFN layout compatibility, and compliance with IEC 61000-4-2/4-4/4-5 surge standards.
Technical Context
The UCLAMP1211P.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 due to decreasing RDS(on) under surge conditions.
It delivers stable 27.5–28V clamping across 24–40A (8/20μs) and −40°C to +125°C, with 175pF junction capacitance at 22V and <600nA reverse leakage - enabling robust protection for 12V bus interfaces without signal integrity compromise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 12V - defines maximum continuous DC operating voltage on protected line without leakage or conduction. |
| Clamping Voltage | 27.5V at 24A (1.2/50μs + 8/20μs combo wave) - ensures downstream 12V-rated ICs (e.g., USB PD controllers) remain below damage threshold during surge. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 12V systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD immunity mandates for exposed ports. |
| Dynamic Resistance | 20mΩ - enables flat clamping response; VC rise ≤0.5V from 24A to 40A, unlike TVS diodes with linear VC = VBR + IPP×RDYN. |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with medium-speed digital buses (e.g., USB 2.0, SMBus, I²C) without signal distortion. |
Pinout & Package
UCLAMP1211P.TNT is housed in a Pb-free, RoHS-compliant DFN 1.6mm × 1.6mm × 0.55mm 6-lead package with exposed thermal pad (not electrically connected). All GND pins must be soldered for full 40A surge capability; all IN pins must be paralleled for lowest inductance path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; requires low-inductance PCB connection via multiple vias to internal ground plane. |
| 4, 5, 6 | IN | Parallel-connected input terminals for protected 12V line; must be routed as single low-impedance trace from connector to device. |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping voltage | 27.5–28V across 24–40A and −40°C to +125°C - eliminates derating uncertainty in thermally demanding environments. |
| FET-based shunt architecture | Replaces PN-junction TVS with active switching; avoids thermal runaway and enables higher energy absorption per mm². |
| Low dynamic resistance | 20mΩ - reduces voltage overshoot during fast-rising transients (<1ns ESD edge), improving protection margin for sensitive analog/RF inputs. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz bursts) - protects against repetitive switching noise in motor drives and PLC I/O modules. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial I/O Module Surge Protection |
|---|---|
Use Scenario: Protecting VBUS line of USB-C receptacles supporting up to 20V PD negotiation, exposed to ESD and lightning-induced surges in docking stations and portable chargers. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed directly at connector, clamping transients before they reach USB PD controller and load switch. Use Value: Maintains 27.5V clamping at full 40A surge and 125°C ambient - prevents overvoltage damage to 12V-rated PD controllers where standard TVS would exceed 35V. |
Use Scenario: Securing 12V auxiliary power inputs on programmable logic controllers (PLCs), remote I/O terminals, and sensor hubs installed in factory-floor cabinets. IC Role / Device Role / Timing Role: Front-end transient guard for 12V supply rail feeding isolated DC-DC converters and microcontrollers. Use Value: Survives repeated ±1kV/42Ω surges (IEC 61000-4-5) while holding clamping below 28V - avoids brownout or latch-up in downstream 12V logic rails. |
| Automotive Body Control Module (BCM) Power Input | Smart Building HVAC Controller 12V Rail |
Use Scenario: Protecting 12V battery-supplied inputs in BCMs handling door lock actuators, mirror controls, and interior lighting drivers. IC Role / Device Role / Timing Role: First-line defense against load dump and jump-start transients on vehicle 12V distribution network. Use Value: Operates reliably from −40°C to +125°C with no clamping voltage drift - ensures consistent protection during cold cranking and under-hood thermal cycling. |
Use Scenario: Shielding 12V power input of HVAC zone controllers mounted in ceiling plenums with limited airflow and elevated ambient temperatures. IC Role / Device Role / Timing Role: Transient suppressor on main 12V input feeding MCU, display driver, and relay interface ICs. Use Value: 175pF capacitance avoids signal ringing on 12V rail monitoring circuits; 600nA max leakage prevents battery drain in always-on building automation nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCLAMP2411P.TNT | 24V working voltage, 32V clamping at 24A, same 40A rating and DFN package. | Targeted for 24V industrial buses (e.g., CAN FD power rails, PoE midspans); not suitable for 12V systems due to higher standoff. | Select only if system nominal voltage is ≥20V; UCLAMP1211P.TNT provides tighter margin for 12V designs. |
| SMAJ12A | Standard unidirectional TVS diode, 12V VRWM, 19.9V VBR, 30.6V VC @ 12.3A, 1500W PPPK, DO-214AC package. | Larger footprint (4.5×3.2mm), higher clamping (30.6V), and rising VC with temperature/current - less effective for high-reliability 12V PD inputs. | Use where cost is primary constraint and thermal derating margins allow; avoid in space-constrained or high-temp USB-C designs. |
Compared with UCLAMP2411P.TNT and SMAJ12A, UCLAMP1211P.TNT uniquely delivers flat 27.5V clamping at full 40A and 125°C in a 1.6mm² DFN - enabling smaller PCB area, higher surge margin, and simplified thermal design for 12V power rail protection.
Availability
UCLAMP1211P.TNT is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial I/O modules, automotive body control units, smart building controllers, and IoT gateway power inputs requiring stable component supply and long-term lifecycle support.
Supply support for UCLAMP1211P.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 high-performance analog and mixed-signal ICs for precision sensing, power management, and transient protection.
The UCLAMP family targets high-reliability EOS protection in compact, thermally demanding applications - engineered to replace traditional TVS diodes with superior clamping stability and surge endurance in 12V–24V systems.
FAQ
What is the maximum continuous operating voltage for UCLAMP1211P.TNT?
The UCLAMP1211P.TNT has a reverse stand-off voltage (VRWM) of 12V, meaning it supports continuous DC operation up to 12V without significant leakage or conduction. This makes UCLAMP1211P.TNT ideal for protecting 12V power rails in USB PD, industrial I/O, and automotive BCM applications where sustained voltage must remain within safe limits.
How does UCLAMP1211P.TNT achieve stable clamping voltage across temperature and current?
UCLAMP1211P.TNT uses a surge-rated FET activated by a precision trigger circuit instead of a PN-junction TVS. As surge current increases, the FET's RDS(on) decreases, maintaining clamping voltage near the trigger circuit's breakdown level. This results in 27.5–28V clamping from −40°C to +125°C and 24–40A - a key advantage over conventional TVS diodes whose clamping rises linearly with current and temperature.
Can UCLAMP1211P.TNT be used on high-speed data lines like USB 2.0 or I²C?
UCLAMP1211P.TNT has 175pF junction capacitance at 22V, which is appropriate for medium-speed digital buses such as USB 2.0 (480 Mbps), SMBus, and I²C (up to 1 MHz). It is not intended for SuperSpeed USB 3.x or PCIe lanes requiring sub-0.5pF capacitance. For those, Semtech recommends RClamp series devices alongside UCLAMP1211P.TNT in hybrid protection schemes.
What PCB layout practices maximize surge performance for UCLAMP1211P.TNT?
To maximize surge performance, place UCLAMP1211P.TNT as close as possible to the protected connector. Connect all three IN pins (4,5,6) with a single low-inductance trace, and tie all three GND pins (1,2,3) directly to a solid ground plane using ≥4 thermal vias. Avoid stubs or splits in the IN/GND paths - this minimizes parasitic inductance and ensures full 40A capability is realized in-system.
Is UCLAMP1211P.TNT compliant with environmental and safety standards?
Yes, UCLAMP1211P.TNT is Pb-free, halogen-free, and RoHS/WEEE compliant. Its molding compound meets UL 94V-0 flammability rating. It satisfies IEC 61000-4-2 (±30kV ESD), IEC 61000-4-4 (±4kV EFT), and IEC 61000-4-5 (40A 8/20μs, ±1kV 1.2/50μs) - making UCLAMP1211P.TNT suitable for global industrial, automotive, and consumer deployments with stringent compliance requirements.
UCLAMP1211P.TNT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 0402 (1006 Metric)
- Series:
- µClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 28.5V
- Current - Peak Pulse (10/1000µs):
- 7A (8/20µs)
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 25pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SLP1006P2
UCLAMP1211P.TNT FAQ
1.How can I place an order for UCLAMP1211P.TNT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP1211P.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 UCLAMP1211P.TNT reliable?
The price and inventory of UCLAMP1211P.TNT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP1211P.TNT is usually 5 days.
3.What payment methods are accepted for UCLAMP1211P.TNT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP1211P.TNT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP1211P.TNT?
UCLAMP1211P.TNT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP1211P.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 UCLAMP1211P.TNT?
For technical support, including UCLAMP1211P.TNT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP1211P.TNT requirements.
6.How does Aetrix verify that UCLAMP1211P.TNT is sourced from the original manufacturer or authorized distributors?
All UCLAMP1211P.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 UCLAMP1211P.TNT meets industry standards.
7.What is the process for return or replacement of UCLAMP1211P.TNT?
All UCLAMP1211P.TNT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP1211P.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 UCLAMP1211P.TNT part is unused and in its original packaging.
Return procedure for UCLAMP1211P.TNT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP1211P.TNT Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
