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Semtech Corporation LCDA12C-8.TBT
- Part No.:
- LCDA12C-8.TBT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LCDA12C-8.TBT.pdf
- Description:
- TVS DIODE 12VWM 26.6VC 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:878
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Product details
Overview
LCDA12C-8.TBT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, 20mΩ dynamic resistance, and 175pF junction capacitance - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the LCDA12C-8.TBT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specifications, DFN-6 package layout guidance, real-world clamping stability across temperature and current, and validated alternatives for 22V bus protection in compact, high-reliability designs.
Technical Context
The LCDA12C-8.TBT implements a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events and rapidly shunts transients to ground. Unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) across 24–40A peak pulse current and −40°C to +125°C operating temperature due to decreasing RDS(on) under surge conditions.
It operates with a 22V reverse stand-off voltage (VRWM) and 25–27.9V breakdown voltage (VBR), supports unsymmetrical line surge testing per IEC 61000-4-5 (±1kV, 1.2/50μs), and delivers 1120W peak pulse power handling - enabling robust protection without thermal derating penalties typical of junction-based TVS devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Stand-Off Voltage | 22 V - defines maximum continuous DC or RMS operating voltage on protected line without leakage activation |
| Clamping Voltage | 27.5–28 V at 40A (8/20μs) - ensures downstream 22V-rated ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surges |
| Peak Pulse Current | 40 A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems |
| Dynamic Resistance | 20 mΩ - enables flat clamping response and minimizes voltage rise under increasing surge current |
| Junction Capacitance | 175 pF at 22V, 1MHz - low enough for 22V power rail protection without signal integrity impact on adjacent traces |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds Level 4 ESD immunity for handheld and portable equipment interfaces |
| Operating Temperature | −40°C to +125°C - supports operation in automotive cabin, industrial control, and outdoor IoT environments |
Pinout & Package
LCDA12C-8.TBT is housed in a RoHS-compliant, halogen-free DFN package measuring 1.6 mm × 1.6 mm × 0.55 mm with 6 leads and UL 94V-0 molding compound. The package features three dedicated ground terminals (Pins 1–3) and three parallel input terminals (Pins 4–6) to maximize surge current sharing and minimize parasitic inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Low-inductance ground return path; all three must be connected to PCB ground plane via multiple vias for full 40A surge capability |
| Pins 4, 5, 6 | IN | Parallel-connected input node for protected bus (e.g., VBus in USB PD); all three pins carry surge current simultaneously |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient shunting | Replaces traditional TVS diodes with active clamping architecture for stable voltage limiting across current and temperature |
| Constant clamping performance | 27.5–28V clamping maintained from 24A to 40A and −40°C to +125°C - eliminates design margin uncertainty in thermal or high-current scenarios |
| High-energy surge rating | 1120W peak pulse power (8/20μs) enables compliance with IEC 61000-4-5 for industrial and USB PD applications |
| Low dynamic resistance | 20mΩ ensures minimal IR drop during surge conduction - critical for protecting low-voltage tolerance components on 22V rails |
| Compact DFN footprint | 1.6mm × 1.6mm area saves >50% board space vs. comparable SO-8 or SOT-23 TVS solutions while supporting same surge rating |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Front-End Protection |
|---|---|
Use Scenario: Protecting VBus lines in USB Type-C receptacles supporting up to 20V/5A PD profiles against lightning-induced surges and connector hot-plug ESD. IC Role / Device Role / Timing Role: Primary EOS shunt device placed directly at connector entry point to clamp transients before reaching PD controller and load switch ICs. Use Value: Maintains 27.5–28V clamping across full temperature range - prevents false overvoltage shutdown and avoids overdesigning with higher IPP-rated TVS diodes. |
Use Scenario: Safeguarding input terminals of high-side load switches (e.g., HS2950P) in remote meters, robotics, and programmable logic controllers exposed to field wiring transients. IC Role / Device Role / Timing Role: Transient energy diversion element that protects internal MOSFET gate oxide and drain-source junction from EOS-induced failure. Use Value: Limits clamping voltage below 30V - ensuring it stays under the absolute maximum drain-source voltage rating of common 30V-rated load switches. |
| IoT Device DC Power Input Protection | Storage Device 22V Backup Rail Protection |
Use Scenario: Securing 22V auxiliary power inputs on battery-backed edge nodes and wireless gateways subjected to EFT bursts and indirect lightning coupling. IC Role / Device Role / Timing Role: First-line transient suppressor on main DC input rail, coordinated with downstream low-capacitance TVS for data lines. Use Value: Delivers ±4kV EFT immunity (IEC 61000-4-4) and 40A surge capacity without derating - enabling single-device protection for compact, sealed enclosures. |
Use Scenario: Protecting 22V backup power rails in NVMe SSDs and enterprise storage controllers where voltage overshoot could corrupt flash memory or PMIC sequencing. IC Role / Device Role / Timing Role: Fast-acting clamping device placed between backup supply and system PMIC input to prevent latch-up or brownout during surge events. Use Value: 175pF capacitance avoids resonance with typical 10–100μF bulk capacitors - preserving power rail stability during transient suppression. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P.C | Identical electrical specs, same DFN-6 package, identical marking (T22), and shared Semtech qualification - direct form-fit-function replacement with same tape-and-reel packaging (3,000 pcs/reel). | No functional difference; used interchangeably in USB PD and industrial designs per Semtech's ordering documentation. | Select TDS2211P.C when sourcing from authorized distributors with standard reel logistics; LCDA12C-8.TBT may reflect regional or contract manufacturing variant. |
| uClamp2411ZA.TCT | 24V VRWM, lower 24A IPP rating, higher 30V clamping, smaller 0.65mm × 0.65mm DFN-2 package - optimized for CC/SBU lines, not power rails. | Designed for low-capacitance (<0.5pF), low-current signal line protection - unsuitable for 40A surge or 22V bus clamping. | Use uClamp2411ZA.TCT only for auxiliary signal lines (CC, SBU); LCDA12C-8.TBT remains required for main VBus protection where high IPP and stable clamping are mandatory. |
Compared with TDS2211P.C, LCDA12C-8.TBT offers identical protection performance and package compatibility, while uClamp2411ZA.TCT serves a fundamentally different role - signal-line ESD suppression - making it non-substitutable for 22V power rail applications requiring 40A surge handling and 27.5V clamping.
Availability
LCDA12C-8.TBT is available at Aetrix Electronics and suitable for USB Type-C PD interface protection, industrial load switch input safeguarding, and IoT device 22V DC power input protection requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LCDA12C-8.TBT 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 semiconductors for power management, protection, and signal integrity applications.
LCDA12C-8.TBT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 22V power rail protection where stable clamping, temperature independence, and high surge current are critical.
FAQ
What is the maximum continuous operating voltage for LCDA12C-8.TBT?
The LCDA12C-8.TBT has a reverse stand-off voltage (VRWM) of 22 V, meaning it can continuously withstand up to 22 V DC or RMS on its input terminal without entering conduction. This makes LCDA12C-8.TBT suitable for nominal 20V USB PD systems and other 22V-rated power rails where sustained voltage stability is required between transient events.
Does LCDA12C-8.TBT require external bias or control signals to operate?
No, LCDA12C-8.TBT is a fully passive, self-triggering device. It contains an integrated precision trigger circuit and surge-rated FET that activate automatically when input voltage exceeds the breakdown threshold (~25–27.9 V). No external power, enable pin, or configuration is needed - LCDA12C-8.TBT functions immediately upon installation in the signal path.
How does LCDA12C-8.TBT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (VC = VBR + IPP × RDYN), LCDA12C-8.TBT maintains a near-constant clamping voltage of 27.5–28 V from 24A to 40A and across −40°C to +125°C. This results from its FET-based architecture, where RDS(on) decreases under surge, eliminating thermal and current-dependent voltage drift seen in junction-based TVS.
Can LCDA12C-8.TBT be used on high-speed data lines like USB SuperSpeed or PCIe?
No, LCDA12C-8.TBT is not intended for high-speed data line protection. Its 175 pF junction capacitance would severely degrade signal integrity on differential pairs operating above ~100 MHz. For USB SS, DP/DM, or PCIe lanes, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25 pF); LCDA12C-8.TBT is strictly for 22V power or low-frequency I/O line protection.
What PCB layout practices are recommended for optimal performance of LCDA12C-8.TBT?
Place LCDA12C-8.TBT as close as possible to the protected connector. Connect all three IN pins (4–6) with a single short, wide trace to the protected line, and tie all three GND pins (1–3) directly to a solid ground plane using ≥3 vias each. Avoid stubs or splits in the ground path - this minimizes parasitic inductance and ensures full 40A surge current sharing across all terminals.
LCDA12C-8.TBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 8
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 26.6V
- Current - Peak Pulse (10/1000µs):
- 20A (8/20µs)
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 8pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
LCDA12C-8.TBT FAQ
1.How can I place an order for LCDA12C-8.TBT through Aetrix?
Please submit a Request for Quotation (RFQ) for LCDA12C-8.TBT 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 LCDA12C-8.TBT reliable?
The price and inventory of LCDA12C-8.TBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LCDA12C-8.TBT is usually 5 days.
3.What payment methods are accepted for LCDA12C-8.TBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCDA12C-8.TBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCDA12C-8.TBT?
LCDA12C-8.TBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCDA12C-8.TBT 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 LCDA12C-8.TBT?
For technical support, including LCDA12C-8.TBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCDA12C-8.TBT requirements.
6.How does Aetrix verify that LCDA12C-8.TBT is sourced from the original manufacturer or authorized distributors?
All LCDA12C-8.TBT 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 LCDA12C-8.TBT meets industry standards.
7.What is the process for return or replacement of LCDA12C-8.TBT?
All LCDA12C-8.TBT units undergo pre-shipment inspection (PSI). If there is an issue with LCDA12C-8.TBT, 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 LCDA12C-8.TBT part is unused and in its original packaging.
Return procedure for LCDA12C-8.TBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LCDA12C-8.TBT Tags
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