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Semtech Corporation LCDA12.TBT
- Part No.:
- LCDA12.TBT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LCDA12.TBT.pdf
- Description:
- TVS DIODE 12VWM 24VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,935
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Product details
Overview
LCDA12.TBT from Semtech is a transient diverting suppressor designed for high-energy EOS protection on 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 175pF junction capacitance at 22V - deployed in USB PD, USB Type-C, and industrial load switch input protection.
For engineers reviewing the LCDA12.TBT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, temperature-stable clamping behavior, and direct alternatives for 22V bus protection in high-reliability embedded and portable systems.
Technical Context
The LCDA12.TBT 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. Its clamping voltage remains nearly constant across 24–40A (8/20μs) due to sub-20mΩ dynamic resistance and low RDS(on) collapse under surge.
Unlike conventional TVS diodes, LCDA12.TBT maintains stable 27.5–28V clamping from −40°C to +125°C and exhibits minimal temperature drift in breakdown voltage (25–27.9V) and leakage (130–600nA at 22V), enabling robust protection in thermally demanding industrial and mobile applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - supports continuous operation on USB PD 20V bus and industrial 24V rails without leakage-induced stress. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - holds protected ICs like USB PD controllers below damage threshold even at full surge rating. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and IoT gateways. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and consumer ESD requirements without derating. |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with USB Type-C VBUS protection where low-frequency filtering is prioritized over high-speed signal integrity. |
| Dynamic Resistance | 20mΩ (8/20μs) - enables flat clamping curve and minimizes voltage overshoot during fast-rising transients. |
Pinout & Package
LCDA12.TBT is housed in a Pb-free, RoHS-compliant DFN package measuring 1.6mm × 1.6mm × 0.55mm with six terminals. The compact footprint saves >50% board area versus SO-8 TVS solutions while supporting high-current routing via three parallel ground and input paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return for surge current; all three must be connected to minimize inductance and maximize 40A capability. |
| Pins 4, 5, 6 | IN | Protected line input (e.g., VBUS); parallel connection ensures uniform current sharing and thermal distribution across FET channels. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based shunt architecture | Enables near-constant clamping voltage across 24–40A and −40°C to +125°C, eliminating thermal derating concerns of silicon diode TVS. |
| Low dynamic resistance | 20mΩ ensures <0.8V additional drop at 40A, preserving margin between clamping and downstream IC absolute maximum ratings. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns) - protects against repetitive burst noise in motor drives and PLC I/O modules. |
| UL 94V-0 molding compound | Ensures flame-retardant reliability in enclosed industrial enclosures and battery-powered portable devices. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBUS lines in USB-C receptacles handling up to 20V/5A PD negotiation. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector to clamp lightning-induced surges before reaching PD controller. Use Value: Maintains 27.5–28V clamping across temperature and current range, preventing false OVP trips and ensuring PD communication continuity during surge events. |
Use Scenario: Safeguarding enable and input pins of high-side load switches (e.g., HS2950P) in remote meters and robotics. IC Role / Device Role / Timing Role: Front-end EOS protector absorbing 40A transients to prevent gate oxide damage and latch-up in integrated FET drivers. Use Value: Clamping voltage stays below 28V across operating temperature, keeping internal switch FET within safe VDS limits during 1.2/50μs surge events. |
| IoT Gateway Power Bus Protection | Notebook/Tablet DC Input Protection |
Use Scenario: Securing 22V auxiliary power inputs in cellular-connected edge gateways exposed to outdoor surge environments. IC Role / Device Role / Timing Role: Primary surge suppression device on main DC input rail, coordinated with upstream fuse and downstream LDO. Use Value: Delivers 1120W peak pulse power handling with stable clamping, reducing need for oversized PCB traces or secondary protection stages. |
Use Scenario: Protecting 20V DC-in ports on ultrabooks and tablets subjected to accidental adapter misconnection or ESD discharge. IC Role / Device Role / Timing Role: Low-capacitance (175pF), high-withstand transient suppressor placed adjacent to barrel jack or USB-C port. Use Value: Enables compact layout with no thermal pad required, while sustaining ±30kV ESD without degradation after repeated strikes. |
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 datasheet Rev 2.5 - confirmed pin-to-pin and functionally equivalent. | No functional difference; TDS2211P.C is the standard orderable variant with 3,000-unit tape-and-reel packaging. | Select TDS2211P.C for volume production with standard logistics; LCDA12.TBT may reflect alternate branding or special test screening but shares full compatibility. |
| uClamp2411ZA | 24V working voltage, lower 20A IPP rating, higher 30V clamping at 20A, and smaller 0.65mm × 0.65mm DFN-2 package - not pin-compatible. | Targeted at CC/SBU lines in USB-C, not VBUS; unsuitable for 40A surge duty or 22V continuous operation. | Use uClamp2411ZA only for low-current control lines; LCDA12.TBT remains mandatory for main power rail protection requiring 40A/22V compliance. |
Compared with TDS2211P.C, LCDA12.TBT offers identical protection performance and layout compatibility, while uClamp2411ZA serves a distinct low-power signaling role - making LCDA12.TBT the sole suitable option for 22V bus-level surge suppression in USB PD and industrial power interfaces.
Availability
LCDA12.TBT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT gateway power buses requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LCDA12.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 ICs for precision protection, sensing, and signal integrity.
The LCDA12.TBT belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace traditional TVS diodes with FET-based clamping for stable, temperature-invariant surge protection in next-generation power interfaces.
FAQ
What is the maximum continuous operating voltage for LCDA12.TBT?
The LCDA12.TBT has a reverse stand-off voltage (VRWM) of 22V, meaning it reliably blocks up to 22V DC or RMS in normal operation without significant leakage. This makes LCDA12.TBT suitable for USB PD 20V systems and industrial 24V rails where transient headroom is critical. Operation above 22V risks premature conduction and accelerated wear.
Does LCDA12.TBT require a thermal pad on the PCB?
No, LCDA12.TBT does not require an exposed thermal pad. Unlike power MOSFETs or linear regulators, LCDA12.TBT dissipates surge energy through controlled FET conduction rather than steady-state power dissipation. The DFN-6 package relies on low-inductance GND connections (pins 1–3) and short IN traces (pins 4–6) for optimal performance - confirmed in Semtech's layout guidelines for LCDA12.TBT.
How does LCDA12.TBT's clamping voltage compare to standard TVS diodes at elevated temperature?
LCDA12.TBT maintains 27.5–28V clamping from −40°C to +125°C, whereas conventional TVS diodes exhibit rising clamping (e.g., +5–10V increase at 125°C). This stability stems from its FET-based architecture - the trigger circuit's breakdown voltage dominates clamping, not junction resistance. For LCDA12.TBT, this ensures consistent protection margins across automotive cabin or industrial enclosure temperatures.
Can LCDA12.TBT be used on high-speed data lines like USB SuperSpeed or PCIe?
No, LCDA12.TBT is not intended for high-speed data lines. With 175pF junction capacitance at 22V, it would severely degrade signal integrity on differential pairs operating above ~100MHz. LCDA12.TBT is specifically designed for VBUS, power rails, and control lines - use low-capacitance devices like RClamp3371ZC (<0.25pF) for USB SS/DP/DM lanes instead.
Is LCDA12.TBT compliant with RoHS and halogen-free standards?
Yes, LCDA12.TBT is Pb-free, halogen-free, and fully compliant with RoHS and WEEE directives. Its molding compound carries UL 94V-0 flammability rating, and lead finish is lead-free - all verified in Semtech's official datasheet Rev 2.5. This compliance supports global market access for LCDA12.TBT in consumer, industrial, and medical end equipment.
LCDA12.TBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 12V (Max)
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 24V
- Current - Peak Pulse (10/1000µs):
- 5A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 5pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LCDA12.TBT FAQ
1.How can I place an order for LCDA12.TBT through Aetrix?
Please submit a Request for Quotation (RFQ) for LCDA12.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 LCDA12.TBT reliable?
The price and inventory of LCDA12.TBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LCDA12.TBT is usually 5 days.
3.What payment methods are accepted for LCDA12.TBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LCDA12.TBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LCDA12.TBT?
LCDA12.TBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LCDA12.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 LCDA12.TBT?
For technical support, including LCDA12.TBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LCDA12.TBT requirements.
6.How does Aetrix verify that LCDA12.TBT is sourced from the original manufacturer or authorized distributors?
All LCDA12.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 LCDA12.TBT meets industry standards.
7.What is the process for return or replacement of LCDA12.TBT?
All LCDA12.TBT units undergo pre-shipment inspection (PSI). If there is an issue with LCDA12.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 LCDA12.TBT part is unused and in its original packaging.
Return procedure for LCDA12.TBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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