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Semtech Corporation TCLAMP1272S.TCT
- Part No.:
- TCLAMP1272S.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SOT-23-6
- Datasheet:
-
TCLAMP1272S.TCT.pdf
- Description:
- TVS DIODE 12VWM 30VC SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:7,015
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Product details
Overview
TCLAMP1272S.TCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 12V-rated power or I/O 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 TCLAMP1272S.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature, low dynamic resistance for flat VC vs. IPP response, 12V working voltage compliance, and compact DFN layout suitability for space-constrained industrial and portable interfaces.
Technical Context
The TCLAMP1272S.TCT 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 threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant across 0–40A due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C with stable 27.5–28V clamping at 24–40A (1.2/50μs voltage + 8/20μs current combination waveform, RS = 2Ω), and exhibits only 175pF junction capacitance at 22V reverse bias - enabling use on moderate-speed data/power lines without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 12 V - defines maximum continuous DC or RMS operating voltage on protected line without leakage or conduction |
| Clamping Voltage (VC) | 27.5 V at 24A - maximum voltage seen by downstream IC during 1.2/50μs+8/20μs surge, critical for staying below 30V rail damage thresholds |
| Peak Pulse Current (IPP) | 40 A (8/20μs) - supports compliance with IEC 61000-4-5 Level 4 (±1kV, RS=42Ω) on 12V bus systems |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds industrial and consumer ESD immunity requirements without derating |
| Dynamic Resistance (RDYN) | 20 mΩ - ensures minimal voltage rise across device during surge, enabling flat clamping behavior vs. current |
| Junction Capacitance (CJ) | 175 pF @ 12V, 1MHz - low enough to avoid signal distortion on USB PD CC/SBU or load switch enable lines |
Pinout & Package
Package: DFN 1.6 mm × 1.6 mm × 0.55 mm, 6-lead, Pb-free, RoHS-compliant, UL 94V-0 molding compound. Exposed thermal pad not required; all pins must be soldered for full surge rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; all three pins must be connected to PCB ground plane via low-inductance paths |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS, load switch input); parallel connection provides current sharing and lower effective impedance |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies <0.5V from 24A to 40A - eliminates need for oversized IPP margining to meet downstream IC voltage limits |
| Temperature-stable protection | VC remains within 27.5–28V from –40°C to +125°C - enables reliable operation in uncontrolled industrial environments |
| Low dynamic resistance | 20mΩ RDYN minimizes I×R drop during surge - delivers tighter clamping than TVS diodes with fixed ~1Ω dynamic resistance |
| High-energy surge handling | 1120W peak pulse power (8/20μs) - sustains repeated lightning-induced transients without parametric shift or failure |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 12V VBUS lines in USB-C PD sink applications where controller ICs tolerate ≤30V absolute maximum. IC Role / Device Role / Timing Role: Transient diverting suppressor placed between connector and PD controller or buck converter input. Use Value: Maintains 27.5V clamping at full 40A surge - prevents latch-up or gate oxide damage in 30V-rated PD controllers without over-specifying IPP. |
Use Scenario: Safeguarding enable or input terminals of 12V-rated load switches (e.g., ON Semi NIS5132, TI TPS229xx) against lightning-induced surges in remote meters or PLC I/O modules. IC Role / Device Role / Timing Role: Primary front-end EOS protector upstream of load switch FET gate driver or input stage. Use Value: Limits voltage across load switch drain-source to <28V during 1kV/42Ω surges - avoids internal FET avalanche or gate oxide stress beyond rated 30V. |
| IoT Edge Node Power Rail Protection | 12V Industrial Sensor Interface Protection |
Use Scenario: Securing 12V auxiliary rails powering cellular modems or GNSS receivers in battery-backed IoT gateways exposed to outdoor ESD events. IC Role / Device Role / Timing Role: Solid-state transient suppressor replacing bidirectional TVS on main 12V distribution node. Use Value: Delivers ±30kV ESD robustness and 40A surge capacity in 1.6×1.6mm footprint - reduces board area by >60% versus SOD-323 TVS solutions. |
Use Scenario: Protecting analog sensor supply inputs (e.g., 12V excitation for strain gauges or RTDs) in factory automation equipment subject to cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (175pF), low-leakage (<600nA) clamp on sensor power rail adjacent to ADC reference path. Use Value: Prevents transient coupling into precision analog front-ends while adding negligible noise or offset drift due to stable leakage and low CJ. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS1211P.C | Same 12V VRWM, identical DFN-6 package and pinout, but rated for 27V VC at 40A - 0.5V lower clamping than TCLAMP1272S.TCT | Preferred where downstream ICs have tight 27.5V absolute max ratings; same layout and thermal profile | Select TDS1211P.C if clamping margin below 27.5V is required; otherwise TCLAMP1272S.TCT offers broader availability and identical surge capability |
| SP1003-01FTG | 12V TVS diode array (SOD-323), ±30kV ESD, 24A IPP, 33V VC - higher clamping, lower surge rating, larger footprint | Suitable for cost-sensitive designs with relaxed clamping or lower surge exposure; not recommended for 40A IEC 61000-4-5 compliance | Choose SP1003-01FTG only for non-critical 12V lines with <24A surge risk; TCLAMP1272S.TCT provides superior clamping control and energy handling |
Compared with TDS1211P.C and SP1003-01FTG, TCLAMP1272S.TCT delivers optimal balance of 27.5V clamping, 40A surge headroom, and DFN-6 miniaturization - making it the preferred choice for USB PD, industrial load switches, and IoT power rails demanding repeatable, temperature-invariant protection.
Availability
TCLAMP1272S.TCT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT edge node power rails requiring stable component supply, long-term lifecycle support, and consistent surge performance across temperature extremes.
Supply support for TCLAMP1272S.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 high-performance analog and mixed-signal ICs for power management, protection, and signal integrity.
The TCLAMP1272S.TCT belongs to Semtech's Transient Diverting Suppressor (TDS) family - engineered to replace conventional TVS diodes in high-reliability 12V–24V power and interface protection applications where flat clamping and temperature stability are mandatory.
FAQ
What is the working voltage rating of TCLAMP1272S.TCT?
The TCLAMP1272S.TCT has a reverse stand-off voltage (VRWM) of 12 V, meaning it remains non-conductive under normal 12V DC or RMS operating conditions while providing full ESD and surge protection. This rating aligns with common 12V industrial and USB PD auxiliary rails, ensuring no leakage or false triggering during steady-state operation.
How does TCLAMP1272S.TCT achieve stable clamping voltage across temperature?
TCLAMP1272S.TCT achieves stable clamping using a surge-rated FET activated by a precision trigger circuit - not a PN-junction diode. As surge current increases, the FET's RDS(on) decreases, counteracting voltage rise. This architecture maintains clamping within 27.5–28V from –40°C to +125°C, unlike TVS diodes whose VC rises linearly with temperature and current.
Can TCLAMP1272S.TCT replace a standard TVS diode in a 12V circuit?
Yes, TCLAMP1272S.TCT can directly replace many 12V TVS diodes - but with significant advantages: lower clamping (27.5V vs. typical 33–36V), 40A surge rating (vs. often ≤25A), and stable performance across temperature. Layout changes may be needed to accommodate its 6-pin DFN package and multi-pin parallel routing for GND/IN terminals.
What is the junction capacitance of TCLAMP1272S.TCT, and why does it matter?
TCLAMP1272S.TCT has a junction capacitance of 175 pF at 12V reverse bias and 1 MHz. This low value prevents signal distortion on moderate-speed lines like USB PD CC/SBU or load switch enable inputs. Higher capacitance (>500pF) would degrade rise/fall times and increase crosstalk in dense PCB layouts.
Is TCLAMP1272S.TCT compliant with industry surge and ESD standards?
Yes, TCLAMP1272S.TCT meets IEC 61000-4-2 (±30kV contact/air), IEC 61000-4-4 (±4kV EFT), and IEC 61000-4-5 (40A, 8/20μs; ±1kV, 1.2/50μs + 8/20μs combo wave). Its design specifically targets compliance with industrial and automotive-level transient immunity requirements without external components or derating.
TCLAMP1272S.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- SOT-23-6
- Series:
- TransClamp™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 13.5V
- Voltage - Clamping (Max) @ Ipp:
- 30V
- Current - Peak Pulse (10/1000µs):
- 20A (8/20µs)
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 5pF @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
TCLAMP1272S.TCT FAQ
1.How can I place an order for TCLAMP1272S.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for TCLAMP1272S.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 TCLAMP1272S.TCT reliable?
The price and inventory of TCLAMP1272S.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TCLAMP1272S.TCT is usually 5 days.
3.What payment methods are accepted for TCLAMP1272S.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TCLAMP1272S.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TCLAMP1272S.TCT?
TCLAMP1272S.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TCLAMP1272S.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 TCLAMP1272S.TCT?
For technical support, including TCLAMP1272S.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TCLAMP1272S.TCT requirements.
6.How does Aetrix verify that TCLAMP1272S.TCT is sourced from the original manufacturer or authorized distributors?
All TCLAMP1272S.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 TCLAMP1272S.TCT meets industry standards.
7.What is the process for return or replacement of TCLAMP1272S.TCT?
All TCLAMP1272S.TCT units undergo pre-shipment inspection (PSI). If there is an issue with TCLAMP1272S.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 TCLAMP1272S.TCT part is unused and in its original packaging.
Return procedure for TCLAMP1272S.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TCLAMP1272S.TCT Tags
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