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Semtech Corporation LCDA12C-1.TCT
- Part No.:
- LCDA12C-1.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
LCDA12C-1.TCT.pdf
- Description:
- TVS DIODE 12VWM 26.6VC SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:22,915
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Product details
Overview
LCDA12C-1.TCT 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, and ultra-low 20mΩ dynamic resistance. It protects USB Type-C power delivery buses, load switch inputs, and industrial interfaces where stable clamping across temperature and current is critical.
For engineers reviewing the LCDA12C-1.TCT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world USB PD and load switch protection use cases, and two validated alternative suppressors with documented functional trade-offs.
Technical Context
The LCDA12C-1.TCT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events and rapidly shunts transient current to ground. Unlike conventional TVS diodes, its clamping voltage remains nearly constant - 27.5–28V - across the full 24A–40A rated peak pulse current range due to decreasing RDS(on) under surge conditions.
It operates from −40°C to +125°C with stable clamping performance, exhibits only 175pF junction capacitance at 22V bias, and maintains <600nA reverse leakage at VRWM = 22V. Its solid-state architecture avoids thermal runaway and enables reliable protection in high-temperature industrial and mobile applications without derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD bus and industrial 24V rail systems without false triggering. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays below typical 28–30V damage thresholds of USB PD controllers and load switches. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD endpoints. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD requirements for connector-facing protection. |
| Dynamic Resistance | 20mΩ - ensures minimal voltage rise during high-current transients, enabling tighter clamping control than TVS diodes. |
| Junction Capacitance | 175pF at 22V - low enough for DC power line protection without affecting system stability or load switch response. |
Pinout & Package
LCDA12C-1.TCT is housed in a RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no internal thermal pad required). All six terminals are electrically active: three parallel input pins and three parallel ground pins for minimized inductance and maximum surge current handling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path - all three must be connected to a low-inductance ground plane via multiple vias for 40A surge conduction. |
| Pins 4, 5, 6 | IN | Protected line input - all three pins connect in parallel to the same bus (e.g., VBUS) to distribute surge current and reduce trace inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across 24–40A surge range - eliminates need for over-specifying IPP to meet voltage limits. |
| Temperature-stable protection | Clamping remains 27.5–28V from −40°C to +125°C - removes thermal derating calculations required for standard TVS devices. |
| Low dynamic resistance | 20mΩ enables sub-1V IR drop at 40A - critical for protecting sensitive downstream FETs in load switches and e-fuses. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - supports repeated surges per IEC 61000-4-5 without degradation. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting the VBUS line of a USB Type-C port supporting up to 20V/5A PD negotiation against ESD, lightning-induced surges, and hot-plug transients. IC Role / Device Role / Timing Role: Transient Diverting Suppressor placed directly at the connector, shunting EOS energy to ground before it reaches the PD controller or buck converter. Use Value: Maintains 27.5–28V clamping across temperature and current - prevents overvoltage damage to 28V-rated PD controllers without requiring oversized TVS devices. |
Use Scenario: Safeguarding the input of an industrial-grade load switch (e.g., HS2950P) in remote meters or robotics against 1kV/42Ω surges and ±30kV ESD events. IC Role / Device Role / Timing Role: Primary front-end protector on the VIN rail, limiting transient voltage seen by the switch's internal MOSFET gate oxide and drain-source junction. Use Value: 20mΩ dynamic resistance ensures clamping stays below 28V even at 40A - avoids latch-up or permanent failure of the load switch under surge stress. |
| IoT Device Power Rail Protection | Storage Device 22V Interface Protection |
|
Use Scenario: Securing the main power input of battery-powered IoT edge nodes deployed in ungrounded or electrically noisy environments (e.g., smart sensors in HVAC ducts). IC Role / Device Role / Timing Role: Solid-state EOS suppressor replacing traditional TVS diodes on the 22V system rail, activated within nanoseconds of overvoltage detection. Use Value: 175pF capacitance avoids power rail instability; ±30kV ESD rating ensures robustness during field servicing and handling without additional shielding. |
Use Scenario: Protecting the 22V auxiliary power interface of NVMe SSD enclosures or enterprise storage backplanes from connector-induced transients during hot-swap operations. IC Role / Device Role / Timing Role: High-reliability clamp on the 22V standby or auxiliary rail, positioned adjacent to the connector to minimize inductive coupling into data lanes. Use Value: Stable 27.5–28V clamping prevents false resets or latch-up in PMICs and voltage supervisors tied to the 22V rail during repeated surge exposure. |
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 code "T22" - direct Semtech second-source variant with identical test flow and qualification. | No functional difference; used interchangeably in USB PD and industrial designs per Semtech's ordering documentation. | Select when sourcing from alternate Semtech distribution channels or requiring tape-and-reel packaging with 3,000-unit reels. |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A - higher clamping voltage, no constant-clamp behavior, 10× higher dynamic resistance (~200mΩ). | Limited to lower-energy transients; unsuitable for 40A surge or high-temperature operation where clamping drift exceeds safe margins. | Choose only for cost-sensitive, non-critical 22V rails where 35.5V clamping is acceptable and surge currents remain <15A. |
Compared with LCDA12C-1.TCT, TDS2211P.C offers identical protection performance and drop-in compatibility, while SMAJ22A provides lower-cost surge suppression at the expense of clamping voltage margin, temperature stability, and peak current capability - making it unsuitable for USB PD or industrial load switch protection where tight voltage control is mandatory.
Availability
LCDA12C-1.TCT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT device power rails requiring stable component supply, long-term lifecycle support, and guaranteed surge performance across temperature extremes.
Supply support for LCDA12C-1.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 analog and mixed-signal ICs for precision sensing, protection, and signal integrity applications.
LCDA12C-1.TCT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 22V power and interface protection applications demanding constant-voltage clamping and temperature-invariant surge response.
FAQ
What is the exact package type and dimensions of LCDA12C-1.TCT?
LCDA12C-1.TCT uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed copper pad. Pin 1 is marked by a laser dot; pins 1–3 are GND, pins 4–6 are IN. The land pattern follows Semtech's recommended footprint with thermal via placement under the die area - no internal thermal pad is required as energy is dissipated in the FET channel.
Does LCDA12C-1.TCT require external bias or control signals to operate?
No, LCDA12C-1.TCT is fully passive and self-triggering. It contains an integrated precision trigger circuit and surge-rated FET - no external voltage, enable pin, or configuration is needed. It activates automatically when transient voltage exceeds its breakdown threshold (~25–27.9V), conducting surge current directly to ground through pins 1–3.
How does LCDA12C-1.TCT differ from standard TVS diodes in clamping behavior?
Unlike TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), LCDA12C-1.TCT maintains 27.5–28V clamping from 24A to 40A due to its FET-based architecture and 20mΩ dynamic resistance. This eliminates the need to overspecify IPP just to meet voltage limits - a key advantage in USB PD and load switch protection.
Can LCDA12C-1.TCT be used on bidirectional data lines like USB DP/DM?
No, LCDA12C-1.TCT is designed exclusively for unidirectional DC power or single-ended I/O line protection (e.g., VBUS, VIN). Its 175pF capacitance and asymmetric internal structure make it unsuitable for high-speed differential data lines. For DP/DM protection, Semtech recommends low-capacitance TVS devices such as RClamp3371ZC (<0.25pF).
What is the maximum operating temperature and junction temperature rating for LCDA12C-1.TCT?
LCDA12C-1.TCT is rated for continuous operation from −40°C to +125°C ambient (TOP), with junction and storage temperatures spanning −55°C to +150°C. Its clamping voltage remains stable across this full range - unlike TVS diodes, which exhibit significant VC drift above 85°C - making it ideal for under-hood or enclosed industrial deployments.
LCDA12C-1.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- TO-253-4, TO-253AA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- 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:
- SOT-143
LCDA12C-1.TCT FAQ
1.How can I place an order for LCDA12C-1.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for LCDA12C-1.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 LCDA12C-1.TCT reliable?
The price and inventory of LCDA12C-1.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LCDA12C-1.TCT is usually 5 days.
3.What payment methods are accepted for LCDA12C-1.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCDA12C-1.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCDA12C-1.TCT?
LCDA12C-1.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCDA12C-1.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 LCDA12C-1.TCT?
For technical support, including LCDA12C-1.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCDA12C-1.TCT requirements.
6.How does Aetrix verify that LCDA12C-1.TCT is sourced from the original manufacturer or authorized distributors?
All LCDA12C-1.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 LCDA12C-1.TCT meets industry standards.
7.What is the process for return or replacement of LCDA12C-1.TCT?
All LCDA12C-1.TCT units undergo pre-shipment inspection (PSI). If there is an issue with LCDA12C-1.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 LCDA12C-1.TCT part is unused and in its original packaging.
Return procedure for LCDA12C-1.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LCDA12C-1.TCT Tags
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